Refrigeration Cycle and Heat Pump System - for educational teaching, training, and learning of refrigerating, heat pump cycle, compressor, condenser, expansion device, evaporator, mollier chart
KR-115 is designed to learn the theory of Heat Transfer in refrigeration engineering. With proper setup, KR-115 can be emulated as a Refrigeration or Heat Pump system. All system components are mounted on the front panel so students can directly observe, touch the components, and hear the noise produced by the components while it is running under either Refrigeration or Heat Pump cycle.
KR-115 offers three expansion devices available for the refrigerant to pass through; they are pressure expansion valve, capillary tube, and thermal expansion valve. Students can use the control panel to switch the preferred expanding path from three expansion devices and compare the corresponding performance under Refrigeration or Heat Pump cycle.
The state of the refrigerant can be clearly observed through 6 sight glasses at different phases of the Refrigeration / Heat Pump cycle. 5 hand valves are used to manually control the flowing direction of the refrigerant circulating through the system. Student must use the valves to lead the refrigerant to the appropriate flowing direction so that the system can operate in corresponding cooling / heating condition. If students mislead the refrigerant to wrong flowing direction, the pressure protection switches will detect the conflict and halt the compressor to prevent the system from being damaged.
1. Refrigeration circulation system with capillary tube
2. Refrigeration circulation system with pressure expansion control valve
3. Refrigeration circulation system with thermal expansion control valve
4. Reverse cycle heat pump system
5. Reverse cycle heat pump system without refrigerant receiver
6. Drawing Mollier Chart
7. Calculating system performance
8. Comparison of system performance
9. Comparison of energy between cooling and heating experiments
10. Coefficient of performance (COP) and energy efficiency ratio (EER)