In which of the following refrigeration system, waste heat can be effectively used?
Vapour compression cycle
Vapour absorption cycle
Air refrigeration cycle
None of these
- The relative coefficient of performance is equal to
- Which of the following statement is wrong?
- The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which…
- If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the…
- The centrifugal compressors are generally used for refrigerants that require
- The advantage of dry compression is that
- Most thermostatic expansion valves are set for a superheat of
- In mechanical refrigeration system, the refrigerant has the maximum temperature
- The wet bulb temperature during sensible cooling of air
- One of the purposes of sub cooling the liquid refrigerant is to
- The undesirable property of a refrigerant is
- The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature,…
- A human body feels comfortable when the heat produced by the metabolism of human body is equal to the
- In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water…
- The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to
- Moisture in Freon refrigeration system causes
- The coefficient of performance of Electrolux refrigerator is the ratio of
- Which of the following refrigerant has the lowest freezing point?
- Freon group of refrigerants are
- The index which correlates the combined effects of air temperature, relative humidity and air velocity…
- In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature…
- For obtaining high COP, the pressure range of compressor should be
- Which of the following statement is correct for ammonia as a refrigerant?
- The dehumidification process, on the psychrometric chart, is shown by
- The optimum effective temperature for human comfort is
- A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking…
- The COP of a vapour compression plant in comparison to vapour absorption plant is
- For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet…
- Mass flow ratio of NH₃ in comparison to Freon12 for same refrigeration load and same temperature…
- The leakage in a refrigeration system using ammonia is detected by