6-49 An air conditioner removes heat steadily from a house at a rate of 750 kJ/min while drawing electric power at a rate of 5.25 kW. Determine (a) the COP of this air conditioner and (b) the rate of heat transfer to the outside air.
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- Thermodynamics: A refrigeration unit using Refrigerant-134a is used to maintain a certain space at –15°C. The condenser rejects heat (?H) to cooling water that enters the condenser at 15°C at a rate of 0.2 kg/s and leaves at 35°C (all as saturated liquid water). The superheated refrigerant enters the condenser at 0.8 MPa and 40°C and leaves as a saturated liquid at the same temperature. If the compressor consumes 4.5 kW of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load (?̇L), (c) the COP.A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor compression refrigeration cycle between 0.18 and 0.7 MPa. The mass flow rate of the refrigerant is 72.4 g/s. Determine the power input to the compressor (in kW). Do not answer in image formatRefrigerant R-134a is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator temperature is -16°C. The saturated vapor enters the condenser at 40°C and the saturated liquid exits at the same temperature. The cooling capacity of the system is 10 tons.Determine:(a) the rate of heat transfer to the refrigerant passing through the evaporator, in kW.(b) the mass flow rate of refrigerant through the system, in kg/s.(c) the coefficient of performance.
- 3. Asteady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 30°C in the condenser as it rejects heat. The evaporator pressure is 160 kPa. Determine a-the coefficient of performance b-the amount of heat absorbed from the refrigerated space c-the net work inputRefrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator temperature is -30°C. Saturated vapor enters the condenser at 36°C, and saturated liquid exits at the same temperature. The mass flow rate of refrigerant is 10 kg/min. Determine the rate of heat transfer to the refrigerant passing through the evaporator, in kW,A refrigerant 12 refrigeration system requires a load of 50 kW at an evaporator pressure of 270 kPa and a condenser pressure of 1000 kPa. The refrigerant is subcooled 10 degrees before entering the expansion valve and vapor is superheated 14 degrees before entering the compressor. Determine the Work of compressor Heat rejected Refrigerating Effect COP Using T and S diagram and this table https://www.docdroid.net/JaBMibo/refrigerant-134a-1-pdf
- A Carnot refrigeration cycle is executed in a closed system in the saturated liquid-vapor mixture region using 1 kg of refrigerant-134a as the working fluid. The maximum and the minimum temperatures in the cycle are 22C and -4C, respectively. If the refrigerant is saturated liquid at the end of the heat rejection process, and the net work input to the cycle is 16 kJ, determine: b) The pressure at the end of the heat rejection process. Should correct please. (Gpt/ai Answer not allowed)A split air conditioning unit operating on vapor compression cycle uses Refrigerant (R-134a). The various state points of refrigerant (R-134a) are shown on the TS diagram. Determine the following a) The refrigerating effect 3 (b) Compressor work 3 (c) The heat rejected in the condenser 2 (d) The COP of heating 2 (e) The tonnage capacity of the unit for the refrigerant mass flow of 0.025 Kg/s.11-28 A space is kept at -15°C by a vapor-compression refrigeration system in an ambient at 25°C. The space gains heat steadily at a rate of 3500 kJ/h, and the rate of heat rejection in the condenser is 5500 kJ/h. Determine the power input, in kW, the COP of the cycle, and the second-law efficiency of the system.
- An ideal refrigerant-134a vapor-compression refrigeration cycle operates between 0.14 MPa and 0.7 MPa. The mass flow rate of the refrigerant is 0.15 kg/s. Determine the rate of heat removal from the refrigerated space, kW.Consider a refrigrator that operates on the vapor compression refrigeration cycle with R-134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 100 kPa, and exits at 1000 kPa and 80°C, and leaves the condenser as saturated liquid at 1000 kPa. The coefficient of performance of this refrigrator is Lütfen birini seçin: a. 1.21 b. 1.87 c. 2.85 d. 1.59 e. 2.34A simple saturated Refrigeration cycle for R-12 system operates at an evaporating temperature of -5°C and a condensing temperature of 40 C. Determine: a) refrigerating effect; b) The work of the compressor; c) The heat rejected in the system and d) The COP