メガケム List of Products and Services

This is a device that uses R1234yf, developed as a substitute refrigerant for HFC-134a. Compared to HFC-134a, it has a lower ozone depletion potential and global warming potential, making it an environmentally friendly refrigerant. The refrigeration system using R1234yf (refrigerant for car air conditioners and vending machines) is clearly arranged on a tabletop base. The high-temperature, high-pressure refrigerant gas (superheated vapor) discharged from the compressor passes through the dryer, solenoid valve, and sight glass, where it is cooled and condensed (subcooled liquid) in the condenser. The low-temperature, low-pressure liquid refrigerant (saturated liquid) that passes through the capillary tube (expansion valve) via the sight glass enters the evaporator, where it undergoes heat exchange with air. The vaporized refrigerant (superheated vapor), which has absorbed latent heat from the air, returns to the compressor via the sight glass and solenoid valve. A P-h diagram (pressure-enthalpy diagram) is created from the measured pressures and temperatures of each component, and the coefficient of performance (COP) of this device is calculated from the inlet pressure and temperature of the compressor and the compressor efficiency.

• Measurement and Inspection

This is a device that uses R1234yf, a refrigerant developed as a substitute for HFC-134a. Compared to HFC-134a, it has a lower ozone depletion potential and global warming potential, making it an environmentally friendly refrigerant. The refrigeration system using R1234yf (refrigerant for car air conditioning and vending machines) is clearly arranged on a tabletop base. The EC2002 has an added heating and cooling switch compared to the EC2001, allowing for effective learning of the heat pump cycle. The high-temperature, high-pressure refrigerant gas (superheated vapor) discharged from the compressor passes through the dryer, solenoid valve, and sight glass, where it is cooled and condensed into a liquid (subcooled liquid) in the condenser. The low-temperature, low-pressure liquid refrigerant (saturated liquid) that passes through the capillary tube (expansion valve) via the sight glass enters the evaporator, where it undergoes heat exchange with air, providing latent heat of vaporization to the air. The vaporized refrigerant (superheated vapor) then returns to the compressor via the sight glass and solenoid valve. By measuring the pressure and temperature at each part, a P-h diagram (pressure-enthalpy diagram) is created, and the coefficient of performance (COP) of this device is calculated from the inlet pressure and temperature of the compressor and the compressor efficiency.

• Other analytical equipment

It consists of an electric heating boiler, a single-stage axial flow impulse turbine, a variable load device (generator), a condenser with a cooling fan, a water tank, and a circulation pump. The water sent to the boiler by the circulation pump is heated by the electric heater to become high-temperature, high-pressure steam, which is injected from four nozzles to rotate the turbine and drive the generator. The used steam is cooled in the condenser with a cooling fan and returned to the water tank. The boiler is temperature-controlled by a PID-controlled electric heater and is equipped with a pressure relief valve and thermal trip for safety.

• Thermal power generation

It consists of a circulating water tank and pump, flow control valve and flow sensor, propeller turbine with guide vanes, generator, and electrical load device. Five propeller turbines of different shapes are included to investigate the efficiency of various propellers and analyze the performance of the power generation system. Additionally, please try creating your own turbine using a 3D printer or similar equipment for experimentation. The turbine mounting section (drain outlet) is designed with transparent resin so that the interior can be observed.

• Hydroelectric power

This is a very suitable teaching material for demonstrating thermal engineering, as it is a heat engine similar to the Carnot cycle that heats and cools gas within a cylinder and converts the thermal energy from its volume changes into work. The power generated by the engine is converted into electrical energy (W) using a motor generator or into mechanical energy (Nm) using a torque meter. Additionally, experiments on refrigeration cycles can be conducted using an external power source (sold separately). The included interface and software can display in real-time the cylinder pressure (kPa), rotational speed (rpm), cylinder volume (cm³), crank angle, and temperature data from both the heating and cooling sides of the displacer on a PC (sold separately), and can draw P-V diagrams to estimate the efficiency of the Stirling engine.

• Analysis and prediction system

We will measure the heat transfer due to forced convection and observe the cooling rate of heated objects in the airflow. The air inhaled from the bell mouth is released into the atmosphere after passing through the experimental area (pin-shaped module), diffusion body, constant-speed fan, flow control valve, and silencer. At the wind tunnel entrance, there is a thermocouple to measure the temperature of the incoming air, and there are two static pressure ports and a pitot tube mounting point before and after the pin-shaped module. The pitot tube can be mounted either in front or behind to measure the velocity distribution in the cross-sectional direction. In the experimental area, pins are arranged perpendicular to the wind direction, and one of them can be removed and replaced with a pin-type heater. The pin-type heater has a thermocouple built into it, allowing us to measure the heat transfer based on the time it takes for the temperature to decrease and the wind speed. The control unit has thermocouple connection ports (2 locations), pressure connection ports (differential pressure at 2 locations), and a heater power switch, and it digitally displays the temperatures at two locations, the differential pressure before and after the pin-shaped module, and the differential pressure between the total pressure and static pressure of the pitot tube. By using the optional (sold separately) data automatic collection system VDAS-B, various data can be collected and analyzed in real-time on a PC (sold separately).

• Analysis and prediction system

The device consists of a main unit made up of a glass container, a heating heater, a water circulation pump, a heating wire test specimen, and a water-cooled cylinder test specimen (with copper oxide surface and gold-plated surface), as well as a control unit composed of a wire temperature adjustment volume and a digital display (for water temperature, water flow rate, voltage, and current). In the boiling heat transfer experiment, the heater wire (resistance) placed inside the glass container is heated, and the transition from subcooled boiling to nucleate boiling and unstable film boiling is observed, drawing a boiling curve from the heat flux and degree of superheat. This metal wire generates high heat exceeding 100°C. In the condensation heat transfer experiment, the heat transfer due to the condensation phenomenon that occurs when steam contacts the surface of the water-cooled cylinder test specimen placed inside the glass container is measured. The heat transfer rate is derived from the temperature changes at the inlet and outlet of the water flowing through the cylinder test specimen and the flow rate. To clarify the effect of surface finishing on heat transfer, the cylinder test specimen has two types of finishes: gold plating and oxide film, revealing the differences between film and droplet condensation. By using the optional data automatic collection system VDAS-B (sold separately), various data can be collected and analyzed in real-time on a PC (sold separately).

• Analysis and prediction system

You will learn about heat energy conversion and power measurement using a boiler and steam engine, as well as the basic principles of thermodynamics. Water pumped from the storage tank by the feedwater pump is superheated in the boiler and becomes steam, which drives a two-cylinder steam engine. The steam exiting the engine passes through a water-cooled condenser and enters a drainage tank or steam measurement container. A manually operated load device connected to the steam engine measures the engine's rotational speed, torque, and output, while thermocouples measure the temperature inside the boiler, the temperature of the throttling calorimeter, and the inlet and outlet temperatures of the cooling water for the condenser, displaying the results digitally. The throttling calorimeter measures the dryness of the steam based on the heat quantity. Two analog gauges display the inlet pressure of the boiler and engine, and an electric meter shows the heater power. The analysis of the Rankine cycle and verification of steam plant performance, including the Mollier diagram, clarify the relationship between pressure and temperature through boiler experiments with saturated steam. For safety, when the water level in the boiler drops and the heater overheats, the heater automatically stops, and a lamp lights up. Additionally, the boiler's safety valve limits the pressure.

• Analysis and prediction system

This device experiments on how heat is transmitted by large changes in pressure and clarifies the differences between radiation and natural convection. It consists of a steel pressure vessel (cylindrical), a control device, a vacuum pump, and a regulator for compressed air. A small heater is suspended in the center of the pressure vessel, and thermocouples for temperature measurement are installed on the heater surface and the vessel wall. The temperatures of the heater and the vessel, as well as the pressure, are displayed digitally. Additionally, the heater surface and the inside of the vessel are blackened to act as ideal thermal radiators. In the experiment, compressed air can be filled up to a maximum of 125 kPa (gauge pressure), and a vacuum of approximately -100 kPa (gauge pressure) can be achieved. Creating a vacuum state reduces heat loss due to convection, allowing for more accurate measurements of heat transfer. The emissivity of the surface is measured, the Stefan-Boltzmann law is demonstrated, and the understanding of dimensionless characteristics using Nusselt number, Grashof number, Prandtl number, and Knudsen number is developed. By using the accompanying data acquisition system (VDAS), various data can be collected and analyzed in real-time on a PC (sold separately).

• Analysis and prediction system

This is a tabletop device that conducts performance experiments on thermoelectric power generation using the Peltier effect, which creates a temperature difference from the voltage between dissimilar metals, and the Seebeck effect, which generates voltage from a temperature difference. In the Seebeck effect experiment, the voltage generated from the temperature difference between the cooling surface and the hot surface of the device is measured using cold water from an external source and variable electric heater output. In the Peltier effect experiment, the electric heater, water storage tank, and water supply pump are adjusted to measure the temperature difference on the device's surface. By accurately measuring the flow of water, the amount of heat transfer can be calculated, allowing for performance evaluation based on temperature gradient and power, as well as analysis of the coefficient of performance (COP) and energy balance in each mode. The device panel includes a schematic diagram and digitally displays heater output (W), cooling water inlet temperature (°C), device surface temperatures (top and bottom), voltage, current, and power. By using the optional (sold separately) data automatic collection system (VDAS-B), various data can be collected in real-time to a PC (sold separately) and experimental results can be analyzed.

• Analysis and prediction system

This is a system commonly used in heating and cooling air conditioning equipment for buildings and houses, as well as radiators. It is a tabletop experimental device where heated hot water circulates through copper pipes in a heat exchanger and exchanges heat with the air flowing through a wind tunnel. The device comes with a 32-tube heat exchanger, and as an option (sold separately), a 16-tube or 16-tube fin-type heat exchanger is available, allowing for experiments to be conducted with either heat exchanger installed. The hot water system consists of a tank with a PID-controlled heater, a pump, and a water level gauge, and it digitally displays the inlet and outlet temperatures and flow rate of the hot water. The air supply duct system is composed of an orifice and pressure ports for flow measurement, an electric fan, and a slide valve, and it digitally displays the temperatures at the duct inlet and the heat exchanger inlet and outlet, as well as the orifice differential pressure. In the empty space on the right side of the device, an optional (sold separately) data automatic collection system (VDAS-F) can be installed. By using the data automatic collection system, various data can be collected in real-time to a PC (sold separately) and the experimental results can be analyzed.

• Analysis and prediction system

This is a tabletop experimental device designed to clarify the relationship between saturated vapor pressure and temperature, and to compare theoretical values. The device, composed of a stainless steel heating container (boiler) and a control unit, is compactly designed for tabletop experiments and conducts variations of saturated vapor pressure with temperature and verification of the Antoine equation. When water is placed in the boiler and heated, the temperature and pressure of the water rise. Sensors read the temperature and pressure, displaying them digitally, while a mechanical Bourdon tube pressure gauge also shows the pressure inside the boiler. Additionally, a front observation window allows for the observation of the boiling process inside the boiler and checking the water level. For safety, the heating element is equipped with a thermostat to limit the heater temperature and a relief valve to limit the boiler pressure. On the right side of the device, there is space to install an optional (sold separately) data automatic collection system (VDAS-F). By using the data automatic collection system, various data can be collected in real-time to a PC (sold separately) and the experimental results can be analyzed.

• Analysis and prediction system

This is a tabletop experimental device that conducts experiments on natural convection, forced convection, and heat transfer using heater modules with different surface shapes. The device consists of a duct measuring 128mm x 75mm, a removable fan, and three types of heater modules. Three thermocouples measure the temperature at the inlet and outlet of the duct and on the surface of the heater modules. Additionally, a manual thermocouple is included to measure the surface temperature at six locations along the module from the side of the duct. The measured temperatures and wind speeds are displayed in real-time on a digital display. Furthermore, by using an optional (sold separately) data acquisition system (VDAS-B), various data can be collected and analyzed in real-time on a PC (sold separately).

• Analysis and prediction system

This is a tabletop experimental device for comparing and verifying the thermal conductivity and heat transfer rates of various metals. The heat transfer experimental device consists of a heater power supply and a measurement data display, and experiments are conducted by attaching one of the options TD1002a to d (sold separately). The heat transfer experimental device (TD1002) supplies variable current to the heater of the optional device, and a safety switch prevents the heater from overheating. In the spare space on the right side of the device, an optional (sold separately) data automatic collection system (VDAS-F) can be installed, allowing for real-time collection and analysis of various data on a PC (sold separately) using the data automatic collection system.

• Analysis and prediction system

This is a tabletop experimental device that demonstrates Charles's (Gay-Lussac's) law, which shows that the volume of an ideal gas is proportional to its absolute temperature when the pressure is constant. A pressure sensor and thermocouples (three locations) are installed in a heater-equipped adiabatic container, and each measurement data is displayed digitally. One thermocouple measures the surface temperature of the heater for control, while the other two measure the air temperature inside the container. The digital display shows the pressure inside the container, the air temperatures at two locations, and their average value. It measures the relationship between the pressure and temperature of an ideal gas (air) to demonstrate Charles's law. The device can also operate in reverse. After heating with the valve open and releasing the air inside the container, the valve is closed. Then, as the container cools down, the pressure and temperature drop are recorded. This allows for results to be obtained under various starting points and surrounding conditions. The optional VDAS automatic recording function is useful for slow natural cooling experiments. By using the optional (sold separately) data automatic collection system (VDAS-B), various data can be collected and analyzed in real-time on a PC (sold separately).

• Analysis and prediction system

This is a tabletop device that demonstrates the relationship between pressure and volume of an ideal gas at a constant temperature (Boyle's Law). It consists of a test cylinder, a reservoir tank, a mechanical pressure gauge, a thermocouple with a digital display, and a digital level gauge, along with a manual pressure pump and a vacuum pump for pressure variation. The experiment is conducted using dry air from the atmosphere while maintaining a constant air temperature. The pressure in the reservoir tank (on the left) is increased or decreased using the manual pump, which moves the liquid piston (oil) in the test cylinder (on the right). Boyle's Law is verified through the changes in air pressure, temperature, and volume confined within the test cylinder. The device includes pressure and temperature sensors, as well as level gauge connection cables, and can collect and analyze various data in real-time on a PC (sold separately) using an optional (sold separately) data acquisition system (VDAS-B).

• Analysis and prediction system

This is a tabletop experimental device used for conducting calibration experiments on the characteristics (linearity) and accuracy of various thermometers commonly used for temperature measurement. The device consists of a heater (ON/OFF switch), a heater tank, an ice box, constant voltage and constant current output terminals, a voltage output display, a Wheatstone bridge circuit, and various resistance terminals, and it comes with eight types of thermometers. Additionally, the included experimental manual allows for smooth execution of the experiments. By using the optional (sold separately) data automatic collection system (VDAS-B), various data can be collected in real-time to a PC (sold separately) and the experimental results can be analyzed.

• Analysis and prediction system

This is a tabletop experimental device that demonstrates heat transfer (overall heat transfer) between adjacent fluids and verifies the effects of flow rate and temperature difference. The heat exchange experimental device TD360 offers four types of heat exchangers: double-tube, plate, multi-tube cylindrical, and tank jacket (coil) type, with experimental items available as options (sold separately). One of these can be attached to the device for experimentation. The system consists of a hot water system and a cooling system, along with a flow control valve and flow meter, with temperatures and flow rates displayed digitally. The hot water system is composed of a tank with a PID-controlled heater, a pump, and a water level gauge, ensuring stable temperature and flow. The digital display shows the inlet and outlet temperatures of hot and cold water, the temperature of the thermocouples integrated into the heat exchanger (sold separately), and the flow rates of hot and cold water, allowing experiments to be conducted without a PC (sold separately). The four types of heat exchangers (sold separately) have the same heat transfer area (0.02 m²) and wall thickness (1 mm), making it easy to compare each exchanger.

• Analysis and prediction system

This study examines the theory of heat transfer by forced convection and various formulas related to forced convection in pipes. The apparatus consists of an electric fan, a heater-equipped copper pipe covered with insulation, a measuring display, and a control panel. The air drawn in by the fan and flow control valve enters the test copper pipe (with an inner diameter of 32 mm) through an orifice. The air heated by the heater is discharged outside while passing through each measurement point. The control panel is equipped with four sets of manometers to measure the pressure loss of the fan, orifice flow rate, pressure loss in the copper pipe, and the differential pressure of the Pitot tube. Additionally, a temperature switch displays the temperatures from 14 thermocouples installed at various locations on the copper pipe. The thermocouples are installed at seven locations on the outer surface of the copper pipe, three locations on the outer surface of the insulation pipe, and three locations on the inner surface of the insulation pipe. A Pitot tube with thermocouples is also included to measure the velocity distribution in the cross-section of the copper pipe. To avoid overheating, the heater is designed to stop when the air is not flowing as specified.

• Analysis and prediction system

The air conditioning systems widely used in various industries, as well as for improving living standards, not only maintain comfort in daily life but also refer to the control of industrial process environments. The EC1550V is a device equipped with an HVAC-R air conditioning system that demonstrates the thermodynamic processes of heating and humidifying, cooling, and refrigeration within ducts. The portable experimental device, using R134a as the refrigerant and equipped with movable casters, draws air from the intake grille on the left side of the duct, passing through a manual opening and closing damper, a variable speed axial fan, a primary heater, a steam humidifier, a heat exchanger (water-cooled), a water sprayer, a mist eliminator, and a secondary heater, before being discharged from the exhaust grille on the right side of the duct. It digitally displays the temperature and humidity for each air conditioning process, the air velocity at one location within the duct, the refrigerant pressure (high and low), temperature, refrigerant flow rate, and the power consumption of the compressor. The chilled water tank, temperature-controlled by the refrigeration system, sends chilled water to the heat exchanger in the duct via a variable speed pump, and the inlet and outlet temperatures and flow rates of the heat exchanger are displayed digitally. The primary and secondary heaters, controlled by PID, can be compared in performance with different power inputs.

• Analysis and prediction system

The air conditioning systems widely used in various industries not only maintain the comfort of life but also refer to the control of industrial process environments, contributing to the improvement of living standards. The air conditioning system experimental device EC1501V demonstrates the cooling and dehumidification processes as well as the thermodynamic processes of refrigeration systems. The tabletop experimental device using R134a as the refrigerant is equipped with an evaporator (evaporator) in the center of the open duct, a fan at the right end, and a disk for flow adjustment. The transparent acrylic plate at the front allows for observation of the internal sensors and the evaporator. The temperature of the refrigeration system, the temperature and humidity at the duct inlet and outlet, and the high and low pressures are digitally displayed on the control panel's LCD display. Additionally, using the included VDAS software, various data can be displayed and collected on a PC (sold separately), and p-h diagrams and psychrometric charts can be drawn.

• Analysis and prediction system

This is a tabletop refrigeration system using refrigerant R134a. You will learn about the pressure-enthalpy diagram (p-h diagram) and derive subcooling and superheating, as well as the coefficient of performance (COP) from the enthalpy changes. The refrigeration circuit is equipped with high and low-pressure gauges, pressure switches, a thermal expansion valve, a sight glass, and a dryer. The evaporator coil (evaporator) and condenser coil (condenser) submerged in a water tank accurately collect temperature changes and clearly demonstrate the heat pump. The water in the tank is circulated by a pump to maintain a steady state. The high and low pressures and temperatures of each component are digitally displayed on the control panel's LCD display, and various data can be displayed and collected on a PC (sold separately) using the included VDAS software. The compressor inlet temperature, thermal expansion valve inlet temperature, and low and high pressures are used to plot the p-h diagram, calculate cooling effect and heating effect (kJ/kg), compressor work (kJ/kg), COPc cooling coefficient, COPh heating coefficient, degree of subcooling (K), degree of superheating (K), and more.

• Analysis and prediction system

This is a tabletop experimental device for an open cooling tower (counterflow type) that cools the cooling water of building air conditioning and heating equipment. Temperature-controlled hot water is sprayed from the top of the cooling tower and is cooled by air while passing through the packing material before returning to the water tank. The orifice at the intake measures the air volume, and the air sent by a variable-speed fan is discharged from the bottom to the top of the cooling tower (counterflow). The measurement values from each sensor (temperature/humidity/flow/pressure) are digitally displayed on the control panel, and data can be collected and automatically calculated using the accompanying software on a PC (sold separately). The device comes with one standard cooling tower that is transparent, allowing for observation of the internal conditions. Additionally, a wide range of experiments can be conducted using four optional cooling towers available for separate purchase.

• Analysis and prediction system

The refrigeration system using R404a as the refrigerant (such as showcases, cold storage, and refrigerated warehouses) has been arranged clearly on a tabletop pedestal. By operating the switch, it is possible to switch between cooling and heating, allowing for effective learning of the heat pump cycle. During cooling operation, the high-temperature, high-pressure refrigerant gas (superheated vapor) discharged from the compressor passes through the dryer, solenoid valve, and sight glass, where it is cooled and condensed into a liquid (subcooled liquid) in the condenser. The low-temperature, low-pressure liquid refrigerant (saturated liquid) that passes through the capillary tube (expansion valve) via the sight glass enters the evaporator. In the evaporator, it undergoes heat exchange with the air, providing latent heat of vaporization to the air, and the vaporized refrigerant (superheated vapor) returns to the compressor via the sight glass and solenoid valve.

• Analysis and prediction system

We will conduct measurement experiments on solar thermal efficiency and heat loss regarding the use of renewable and environmentally friendly energy sources. Similar to devices used for residential heating or swimming pools, it consists of pipes arranged on a plate, a transparent acrylic cover, a portable frame with an angle adjustment mechanism, a mixing pump, a pressure relief valve, and a control unit. The back of the plate is treated with insulation to reduce heat loss. Cold water supplied from sources such as water mains passes through a flow meter and valve, is heated by the solar collector, and enters the pump. The hot water discharged from the pump mixes with the supplied cold water and heads back to the solar collector. The pressure relief valve operates based on the water supply pressure, releasing hot water to limit internal pressure. The control unit digitally displays the cold water flow rate, solar radiation, cold water temperature, inlet/outlet temperatures of the solar collector, and ambient temperature, clarifying the energy efficiency and heat loss of the solar collector. By using the optional (sold separately) data automatic collection system VDAS-B, various data can be collected in real-time to a PC (sold separately), allowing for the analysis of experimental results.

• Analysis and prediction system

The device mounted on a movable cart understands the principles, advantages, and limitations of collecting solar energy. The device consists of a highly polished stainless steel parabolic reflector, a copper cylindrical energy collector, a turntable, and a display unit. By adjusting the horizontal and vertical positions of the reflector, solar energy can be gathered into the energy collector, and four types of collectors of different sizes allow for experiments at various concentration ratios. Additionally, a removable transparent cover enables the comparison of collector characteristics with and without shielding. A pyranometer is installed on the reflector support to measure the amount of solar radiation energy, and the display unit digitally shows the collector temperature, ambient temperature, and solar radiation amount. By using the optional (sold separately) data automatic collection system VDAS-B, various data can be collected in real-time to a PC (sold separately), and experimental results can be analyzed.

• Analysis and prediction system

This is an experimental device for learning about the performance and usage of solar panels and energy storage systems, which are forms of renewable energy. It consists of a solar panel mounted on a lightweight frame with casters, which can be adjusted for angle, a solar radiation meter, a solar panel unit made up of batteries, a control unit that includes a charge controller, and an electrical load unit. The control unit digitally displays the solar panel voltage and current output, battery voltage and current output (when charging), voltage and current output to the electrical load unit, and solar radiation (W/m²). The electrical load device includes four filament lamps and a variable electrical load device (3-50Ω), as well as a 100W inverter for external output. Experiments using batteries with low capacity help investigate charge and discharge cycles. By using the optional (sold separately) data automatic collection system VDAS-B, various data can be collected in real-time to a PC (sold separately) and the experimental results can be analyzed.

• Analysis and prediction system

This is an experimental device for learning the basics of wind power generation, equipped with a 70W wind turbine and a φ400mm axial flow fan wind tunnel, mounted on a movable caster stand. Air drawn in from the left bell mouth passes through a honeycomb, anemometer, wind turbine, safety mesh, axial flow fan, and silencer duct before being discharged. Experiments are conducted while manipulating wind speed, blade pitch, yaw angle, and turbine speed (load resistance), with parameters such as blade pitch, yaw angle, turbine rotation speed (rpm), and current output (A) digitally displayed on the control box. Additionally, using the accompanying software (VDAS), wind speed (m/s), output (W), generator voltage (V), and other data can be automatically calculated in real-time, allowing for efficient collection of experimental data on a PC (sold separately). Transparent observation windows are located at the front and back of the experimental area, and the front opening door is equipped with an interlock safety mechanism.

• Analysis and prediction system

This is a device for visualizing the airflow around a model installed in a wind tunnel, which generates smoke from the tip of a probe. It consists of an oil supply device and an electric heater control device, and it controls the amount of smoke (oil droplets) generated by adjusting the oil supply and heater output volume.

• Analysis and prediction system

Compressed air is rapidly blown from an optional (sold separately) large-capacity compressor and tank into the downstream of the experimental area. The air that passes through the straightening and contraction sections of the wind tunnel supplies stable flows at subsonic, Mach 1.4, and Mach 1.8 to the experimental area. The air that has passed through the experimental area mixes again with the blown air and recirculates. Excess air is discharged from the exhaust filter. The experimental area, measuring 100mm x 25mm, comes with three types of interchangeable liners for subsonic, Mach 1.4, and Mach 1.8. The included model is mounted in the center of the observation window, and experiments are conducted while changing the angle. The pressure at 25 locations in the experimental area is displayed in real-time digitally in four groups, and two Bourdon tube pressure gauges show the pressure from the compressor (sold separately) and the supply pressure to the wind tunnel. *The operating time (approximately 10 to 20 seconds) varies depending on the capacity of the compressed air tank, etc.

• Analysis and prediction system

This is a device specially designed to conduct extensive experiments on the takeoff, flight, and landing of aircraft. The aircraft model in the suction-type open wind tunnel consists of two propellers, a main wing with a chord length of 152mm (NACA2412), and a fully movable tail with a chord length of 76mm. Air flowing in from the bell mouth is discharged from the device through a straightening honeycomb, the experimental area equipped with the aircraft, a diffusion body, an axial fan, and a silencing duct. The control wheel located at the front of the experimental area manipulates the tail angle of the aircraft model, while the lever simulating the engine throttle on the right side controls the wind speed within the wind tunnel.

• Analysis and prediction system

This is a specially designed small wind tunnel to visualize the airflow around a model. The compact device can be demonstrated in various locations, such as classrooms, regardless of the laboratory setting, and can be easily moved and stored when not in use. The airflow moves from the bottom to the top. Air entering from the bottom of the device passes through a converging section and a comb-shaped nozzle, then enters observation ducts illuminated on both sides. The lighting clarifies the streamlines around the model. There is a variable-speed fan at the duct exit, which adjusts the flow rate based on volume. A smoke generator is located at the bottom of the device. Smoke (oil droplets) is produced by heated vegetable oil and carbon dioxide supplied from a cylinder, and is sent to the comb-shaped nozzle. From the comb-shaped nozzle, 23 streamlines are released to observe the airflow around the model.

• others

This open-type suction wind tunnel can conduct a wide range of experiments related to fluid dynamics while being compactly designed. It consists of a large bell mouth, a two-dimensional nozzle contraction body, an experimental area (305x305x600mm), a diffusion body, a protective mesh, an axial flow fan, and a silencer unit, achieving a flow with minimal turbulence. The control unit (desktop type) regulates the rotational speed of the axial flow fan and controls the flow velocity in the experimental area. The wind tunnel and control unit mounted on a caster-equipped frame are designed to be very compact, making it easy to change their arrangement. Various options can be added according to the experimental purpose. The optional data automatic collection system VDAS (sold separately) can display measurement data in real-time on a computer (sold separately) and can calculate and graph the collected data, facilitating a smooth progression of experiments.

• Analysis and prediction system

This open-type suction wind tunnel, despite its compact design, allows for a wide range of experiments related to fluid dynamics. It consists of a large bell mouth with a honeycomb, a two-dimensional converging nozzle, an experimental area (125x125mm), a diffusion section, a protective mesh, a variable-speed fan, and a silencer unit, achieving a flow with minimal turbulence. The included manometers (6 units) and two Pitot tubes positioned before and after the experimental area measure wind speed and the pressure distribution in the wake of the model. The experimental area has four sides made of transparent acrylic panels, with the front and back panels being removable. The device comes with a single force balance measurement system and three types of experimental models (a cylindrical model with pressure holes, a NACA0012 wing model, and a flat plate model), allowing for immediate experiments on drag or lift, as well as pressure distribution experiments around a cylinder. The drag or lift (N) is digitally displayed on the included display unit. Additionally, the single force balance measurement system can be mounted on the underside of the experimental area, enabling the measurement of drag (N) with original test specimens made using a 3D printer or similar methods.

• Analysis and prediction system

The open channel is a variable slope type with a width of 300mm and a depth of 450mm, and the length of the channel can be selected from 5/7.5/10/12.5/15M. The channel consists of a water storage tank, a water circulation pump, a flow meter, a channel slope adjustment device, an electric drainage gate, and a control panel. The channel is equipped with a digital flow meter and an inclinometer, and a separate control panel manages the water flow, channel slope, and drainage gate level, with the drainage gate level setting the water depth in the channel. Pressure measurement holes spaced 25cm apart along the channel allow for analysis by connecting to a separately sold manometer or pressure display. The FC300 comes with necessary equipment for experiments, including a sluice gate, a weir, a depth gauge, a pitot tube for total pressure measurement, and a float switch, along with an experimental manual. Additionally, various options (sold separately) are available to suit experimental purposes. Furthermore, the included dedicated software (VDAS) can display and save water flow and channel slope data in real-time to a PC (sold separately).

• Analysis and prediction system

A transparent container that creates various types of vortices, generating natural and forced vortices, and measuring their shapes and movements. The device consists of a transparent container with a diameter of 380 mm that rotates with a variable speed motor, a removable perforated transparent container with a diameter of 286 mm, and a traversing pitot tube and depth gauge. Experiments will be conducted with the natural vortex flow using the perforated transparent container attached, and with the forced vortex flow after removing it.

• Analysis and prediction system

We observe the impact of a precise and rapid high-speed jet stream on the test specimen (blade) and measure its force. As an optional accessory, a 120° conical plate and a 30° inclined plate (H8a) are also available, allowing us to measure the forces on various surfaces subjected to jet impact and understand the laws of momentum to solve jet impact problems.

• Analysis and prediction system

The analysis of the flow through the orifice will be conducted as a function of cross-sectional area, flow velocity, and flow rate. It consists of a cylindrical glass tank and an orifice, allowing observation of the water head situation through the orifice, and the measurement of the water head and its range of the jet flow using an integral pitot tube. An aluminum orifice set (6 types) is included. A H1F hydraulic bench (sold separately) is required for water supply and flow measurement for the experiment.

• Analysis and prediction system

This is a portable small water channel consisting of a 2.5M long transparent acrylic water channel and slope system. It is designed to be used in combination with the hydraulic bench H1F (sold separately), and comes with necessary weirs, flumes, depth gauges, and pitot tubes for total pressure measurement, along with the experimental procedure manual.

• Analysis and prediction system

It is a small water channel made of reinforced plastic, which allows for the installation of different weirs to control the flow and measure and analyze the flow rate. The device is installed on a hydraulic bench H1F (sold separately) to supply water. It comes with a rectangular weir, two types of V-shaped weirs, and a height gauge. For the experiment, a hydraulic bench H1F (sold separately) for water supply and flow measurement is required.

• Analysis and prediction system

It consists of a 2.5M long adjustable slope open channel, a water storage tank, a water circulation pump, a channel slope adjustment jack, a digital inclinometer, and a digital flow meter, capable of drawing up to 180L.min-1 of water to the upstream of the channel with a cross-section of 80xH250mm. Additionally, necessary equipment for the experiment, such as weirs, flumes, depth gauges, and pitot tubes for total pressure measurement, will be provided along with the experimental procedure manual.

• Analysis and prediction system

This is a compact tabletop experimental device for testing the operation characteristics of two centrifugal pumps in series and parallel operation, or a single pump. The device consists of electric motors (variable speed) that drive each pump individually, a transparent acrylic water storage tank and valves (for each pump inlet and outlet), pressure sensors (for each pump inlet and outlet), and a flow sensor (for the drainage outlet). The impeller part of each pump is designed with a transparent cover for observation, allowing for demonstrations of cavitation. The included control box allows for variable adjustment of motor speed and digitally displays rotation speed (rpm), torque (N.m), output (W), pressure (bar), flow rate (L/s), and temperature. Additionally, the included data acquisition software VDAS can collect and analyze various data in real-time on a PC (sold separately). *There is also an analog type of experimental device similar to the H53V. H52 Series and Parallel Pump Experimental Device (Constant Speed) The H52 has a constant speed pump motor and is composed of an analog pressure gauge and a float-type flow meter.

• Analysis and prediction system

This is a small wind tunnel experimental device with a test section of 100x50mm. It has a very compact design, allowing for easy movement and storage when not in use. It can be used in a wide range of experiments in combination with auxiliary equipment for demonstrations in lectures, practical training in laboratories, and student research projects. The air discharged from the blower flows into the test section through the rear duct, upper chamber, honeycomb, and converging section. The wind speed is derived using Bernoulli's theorem from the pressure in the test section and the chamber. This device has eight types of experimental setups available for separate purchase, ranging from AF11 to AF18, which can be easily attached to AF10. Each experimental setup can be purchased individually, and you are encouraged to consider configurations that meet your needs.

• Analysis and prediction system

We will demonstrate the transition from laminar flow to turbulent flow and compare the critical Reynolds number in transitional flow with theoretical values. The setup consists of a glass head tank and glass tubes, an ink tank, and an injector, allowing us to observe the behavior of the flow using dye while adjusting the flow rate with a drainage valve located at the bottom of the apparatus. We will experiment to see what happens when the flow changes from laminar to turbulent. Additionally, experiments can be conducted using an optional heater module (sold separately) to vary the water temperature and viscosity.

• Analysis and prediction system

It consists of a 5-meter long adjustable slope open channel, a water storage tank, a water circulation pump, a channel slope adjustment jack, a digital inclinometer, and a digital flow meter, capable of drawing up to 180 L/min of water to the upstream of the channel with a cross-section of 80xH250mm. Additionally, necessary equipment for the experiment, such as weirs, flumes, depth gauges, and pitot tubes for total pressure measurement, will be included with the experimental procedure document.

• Analysis and prediction system