1. The cycle of operation is repeated after the liquid refrigerant passes back to the regulator after leaving the condenser.
2. The surrounding air inside spaces is cooled by refrigerant passing through the coils.
3. Storage vessel is used for keeping surplus refrigerant.
4. The cycle of refrigeration is repeated continuously in the refrigerating plant.
5. If gas contain some liquid, the crankcase will become cold or frosted.
III. a) , .
C 6 7 If the regulator evaporator.
b) , ; .
If the regulator is passing an excess of refrigerant ( ), then the gas entering the compressor will still contain some liquid ( ), which will cause the crankase to become cold or frosted.( ).
If the regulator is insufficiently open ( ), all the liquid will have evaporated before reaching the end of the circuit ().
The pressure in the condenser will correspond to the temperature of condensation.( ).
IV. , .
An evaporator, coils, an air cooling battery, a compressor, a regulator, a crankcase, a condenser, a geuge, a receiver, a storage vessel.
V. .
1. A device where the heat of compression is extracted is the condenser.
2. A device where the gas is recompressed is the compressor.
A device which acts as a storage vessel is the a receiver.
4. A device which passes liquid refrigerant only at the proper rate is the regulator.
5. A device that cools the surrounding air is the evaporator.
A device that shows the pressure is the gauge.
VI. .
1. The evaporator coils consist of grids.
2. The grids are on the walls and ceiling of the chamber to be cooled.
3. The air cooling battery is placed behind the screen.
4. A vessel may contain brine, water or other fluid.
5. The evaporator is first cooled with refrigerant.
6. Evaporator cools the surrounding air.
7. Absorbption causes the refrigerant to evaporate.
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8. The dry gas remain in the in the evaporator at the end of the circuit.
9. The gas in the compressor will contain some liquid if the regulator is passing an excess of refrigerant.
10. The compressor crankcase become frosted when the gas entering the compressor will contain some liquid.
11. If the regulator is insufficiently opened all the liquid will have evaporated before reaching the end of the circuit as a result only part of evaporator coil can do useful work.
12. A regulator passes liquid refrigerant at the rate at which it is formed in the condenser.
13. Yes, it preserves the right proportion of the total charge in the condenser and in the evaporator.
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14. The gas is recompressed in the compressor to the pressure necessary for condensation.
15. The gas passes into the condenser after compressor.
16. The heat is extracted in the condenser by means of the condenser cooling medium (water).
17. The gas again become a liquid when the heat of evaporation and compression is extracted by the cooling medium in the compressor.
18. The relationship pressure / temperature is shown on the gauge.
19. A receiver acts as a storage vessel for surplus refrigerant.
20. The liquid refrigerant passes back to the regulator to repeat the whole cycle of operation.
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70 (21 ) 600 850 .
100 (38 ) 210 290 .
140 (60 ) 85 110 .
200 (93 ) 45 50 .
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