KTE-3000HD
4-WAY VALVE HEAT PUMP HEATING & COOLING EQUIPMENT
Equipment Introduction
This equipment is designed for experimental investigation of refrigerant flow direction switching using a 4-way valve, as well as for analyzing the cooling and heating operation characteristics of a heat pump system
A DAQ-based monitoring program is provided to enable real-time measurement of temperature, pressure, enthalpy, and heat transfer rate at each designated position in the system
All measured data can be automatically saved in Microsoft Excel format, allowing the data to be easily visualized, analyzed, and evaluated using graphical methods
Equipment Characteristics
Cooling cycle:
Compressor → 4-way valve → Heat exchanger 2 → Check valve 2 → Receiver → Filter dryer → Sight glass → Solenoid valve → Manual expansion valve → Heat exchanger 1 → Liquid separator → Compressor
Heating cycle:
Compressor → 4-way valve → Heat exchanger 1 → Check valve 1 → Receiver → Filter dryer → Sight glass → Solenoid valve → Manual expansion valve → Heat exchanger 2 → Liquid separator → Compressor
The system can be operated in manual mode, thermostatic control mode, or pump-down mode through connection with a sequence control system
Equipped with an automatic refrigeration performance measurement, data acquisition, and system monitoring program
Temperature measurement is available at the compressor inlet and outlet, condenser inlet and outlet, expansion valve inlet and outlet, evaporator outlet, inside chamber, and outside air using K-type thermocouples
Pressure measurement is available within the range of –1 to 35 bar at the compressor inlet and outlet, condenser outlet, and expansion valve inlet using installed pressure sensors
Experimental parameters include:
Refrigeration effect
Compressor work
Condensing heat transfer
Evaporating latent heat
Amount of flash gas at the expansion valve outlet
Dryness fraction and humidity at the expansion valve outlet
Coefficient of Performance (COP)
Measured temperature and pressure data
Measurement data can be automatically saved every minute, up to 1,440 minutes, as an Excel file by clicking the “SAVE” button
Education Contents
Heat pump system measurement and analysis using software-based monitoring
Cooling performance measurement and analysis of a heat pump system
Heating performance measurement and analysis of a heat pump system
Configuration and operation of sequence control circuits for refrigerant flow direction reversal in a heat pump system
Configuration and operation of manual control sequence circuits for a heat pump system
Manual control PLC programming for heat pump system operation
Configuration and operation of automatic control sequence circuits for a heat pump system
Automatic control PLC programming for heat pump system operation
Product Composition
Mechanical Refrigeration Device Component
Control Panel Devace Component
4 Way Valve Principle
Cooling operation
The valve is not powered during cooling operation, a compressed high-pressure refrigerant is connected to the heat exchanger
Heating operation
Power the valve during heating operation. When power is applied to the valve, the cap inside the body moves in the direction of A, and changes the direction of refrigerant flow.
The compressed high-pressure refrigerant is connected to the heat exchanger on the first side to deliver high temperature.
Structure of DA100 Program
Schematic diagram of the system displaying temperature and pressure in real time.
P–h (Pressure–Enthalpy) chart.
Data table showing temperature, humidity, and enthalpy values.
Calculated performance values, including Coefficient of Performance (COP), cooling capacity, and heating capacity of the heat exchanger.
Toggle switch to start the program and save measured data.
Refrigeration Cycle
Video Clips for Product Usage
