Vapour jet compressor in refrigeration engineering ET 352
Vapour jet compressor in refrigeration engineering
|Name:||Vapour jet compressor in refrigeration engineering|
Unlike standard compression refrigeration systems, vapour jet refrigerating machines do not have a mechanical but a vapour jet compressor. This makes it possible to use different heat sources for cold production. Such sources could e.g. be solar energy or process waste heat.
The system includes two refrigerant circuits: one circuit is used for cold production (refrigeration cycle), the other circuit is used for the generation of motive vapour (vapour cycle).
The vapour jet compressor compresses the refrigerant vapour and transports it to the condenser. A transparent tank with a water-cooled pipe coil serves as condenser.
In the refrigeration cycle some of the condensed refrigerant flows into the evaporator connected to the intake side of the vapour jet compressor. The evaporator is a so-called flooded evaporator where a float valve keeps the filling level constant. The refrigerant absorbs the ambient heat or the heat from the heater and evaporates. The refrigerant vapour is aspirated by the vapour jet compressor and compressed again.
In the vapour cycle a pump transports the other part of the condensate into a vapour generator. An electrically heated tank with water jacket evaporates the refrigerant. The generated refrigerant vapour drives the vapour jet compressor. Alternatively to the electric heater, solar heat can be used as drive energy by using ET 352.02 and the solar thermal collector HL 313.
Relevant measured values are recorded by sensors, displayed and can be processed onto a PC. The heater power at the evaporator is adjustable. The cooling water flow rate at the condenser is adjusted using a valve.
Vapour jet compressor
- dmin convergent-divergent nozzle: approx. 1,7mm
- dmin mixing jet: approx. 7mm
- tank: approx. 3,5L
- pipe coil area: approx. 0,17m2
- tank: approx. 3,5L
- heater power: 4x 125W
- refrigerant tank: approx. 0,75L
- water jacket: approx. 9L
- heater power: 2kW
- max. flow rate: approx. 1,7L/min
- max. head: approx. 70mWS
- temperature: 12x -20…100°C
- pressure: 2x 0…10bar; 2x -1…9bar
- flow rate: 3x 0…1,5L/min
- power: 1x 0…750W, 1x 0…3kW
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase, 230V, 60Hz, 3 phases
Weight: approx. 225kg
water connection, drain, PC with Windows recommended