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- The function of the pressure tank in an open-loop, geo-thermal heat pump well system is to prevent the well pump from _____.9. The preservation of foodstuffs by refrigerating is an expensive process, butthe canning process is more expensive than refrigeration. Ills?A R22 refrigeration system is used to operate between 45degC and -30degC. The total cooling capacity is 350 kW. a. What is the ideal COP of the system? b. What is the heat rejected by the system? c. What is the total power consumed by the system? There are several steps made to improve the performance of the system. What happens to the COP, heat rejected and power consumed by the system when: d. For the same evaporator and condenser pressure, the temperature at the entrance of the compressor is -20degC, and the inlet to the expansion valve is subcooled by 5degC. Due to the wide temperature gap, it is decided to use a two-stage refrigeration system using flash gas removal and optimal intercooling operation in a flash chamber. What happens to the COP, heat rejected and power consumed by the system when: e. Having a low pressure and high-pressure compression. f. Two evaporators and two compressors, with the lower temperature evaporator having a cooling capacity of 225 kW. Notes: The…
- Under the established parameters of the "refrigeration & cryogenic plant for oxygen poduction", elaborate the design outdoor condtion and design indoor condition? What do you think is the refrigerant type which best for cryogenic plantPls. Answer thank you! An auditorium seating 1600 people is to be maintained at 80°F dry bulb and 65°F wet bulb temperature when outdoor air is at 91oF dry bulb and 75oF wet bulb. Solar heat load is 120,000 Btu/hr and supply air is at 60°F, determine the amount of supply air. (Use sensible heat load of 225 Btu/hr per person)What are the consideration of the design outdoor conditoon and indoor condition when constructing a refrigeration and cryogenic plant for liquid oxygen production? Please input sources.
- The air-handling unit of an air conditioning plant a total of 300 m3/min of dry air which comprises by volume 20% fresh air at DBT=40'C, WBT= 29°C and 80% return air at DBT-25 C, RH-50%. The air conditioned space has a sensible and latent heat load of 58 kW and 14.5 kW respectively. Calculate: a) Air supply temperature (Ts). b) Apparatus dew point temperature (ADP). c) BPF. d) The cooling coil load in TR. e) Plot the processes psychometrically.I. ESSAY/ ENUMERATION 1. GIVE ATLEAST 5 ADVANTAGES AND 5 DISADVANTAGES OF INORGANIC REFRIGERANTS. 2. HOW DOES A REFRIGERANT WORKS IN A REFRIGERATION SYSTEM? 3. DIFFERENTIATE POSITIVE AZEOTTROPES AND NEGATIVE AZEOTROPES IN TERMS OF THEIR APPLICATION IN REFRIGERATION SYSTEMS. 4. THE FOUR MAIN COMPONENTS OF A REFRIGERATION SYSTEM ARE COMPRESSOR, CONDENSER, EVAPORATOR AND AN EXPANSION VALVE. EXPLAIN BRIFLY THE FUNCTION OF EACH COMPONENT AND THE FLOW OF THE CYCLE.2. A Refrigeration system using R-22 has a capacity of 320 kW of refrigeration. The evaporating temperature is -10°C and the condensing temperature is 40°C. Calculate the dryness fraction in the mixture before the evaporator. A. 0.287 B. 0.315 C. 0.245 D. 0.227
- With a diagram explain Li-Br Vapor absorption refrigeration system and write its application andlimitations?6. An auditorium is to be maintained at a temperature of 26°C & 50% RH, Air is to be supplied at a temperature not lower than 15°C. The sensible heat gain is llokw and the latent heat gain is 37.5 kw, Take venti- lating air as 25% by weight of the air from the room, and is at 35°C & 60% RH. Determine the refrigeration capacity in TR(b) Determine the cooling load (q₁), heat rejection (q) and actual compressor work input (w) per unit mass in kJ/kg. . C. (c) Calculate the coefficient of performance (COP) of this actual refrigeration cycle and compare it with the COP of a reversed Carnot cycle for refrigeration if used under the same inside and outside amblent temperatures.