Vapour Compression Refrigeration Unit

• Complete refrigeration system enabling demonstration of the vapour compression refrigeration cycle
• Fully instrumented to enable complete analysis of the processes involved and calculation of the changes in performance with operating conditions
• Computer controlled system with automatic recording of process variables using an integral USB interface
• Hermetically sealed rotary compressor driven by DC motor with three phase BLDC variable speed drive
• Compressor speed under computer control with a wide range of operation from 2000 to 4400 RPM
• Real time display of superheat calculations
• Real time display of Coefficient of Performance
• Energy transferred to the evaporator and from the condenser measured independently on the service side of the process
• Measurement sensors include:

– 9x Thermistor sensors measuring temperatures throughout the system
– 2x Turbine type flow meters measuring flow of water through the condenser and e vaporator
– 2x Electronic sensors measuring pressures before and after the compressor
– 2x Bourdon type refrigeration pressure gauges (with scale indicating equivalent refrigerant saturation temperature)
– 1x Variable area flowmeter measuring refrigerant flowrate
– 1x DC Current shunt measuring current to the compressor motor

• Supplied complete with large water reservoir to isolate the process from fluctuations in temperature or pressure in the mains water supply
• Comprehensive instruction manual supplied

Features:

• Complete system enabling demonstration of the vapour compression refrigeration cycle
• Computer controlled with automatic recording of measured and calculated variables using a PC
• Hermetically sealed rotary compressor with wide speed range can be varied by the operator
• Condenser and evaporator both use plate heat exchangers with water as the heat transfer medium enabling a full energy balance to be carried out while varying the operating conditions on both sides of the compressor
• Overall performance of the system is calculated and displayed continuously enabling the effect of changes in the system to be evaluated
• Instrumented with electronic sensors measuring temperatures throughout the process, pressure on both sides of the compressor and independent water flowrates through the condenser and evaporator
• Bourdon type gauges indicate the pressure and corresponding refrigerant saturation temperature on both sides of the compressor independent from the electronic systems
• Variable speed pumps supply water at stable temperature and pressure from a large reservoir to the condenser and evaporator eliminating random fluctuations