The COP of a Carnot heat pump operating between 6°C and 37°C is.
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- The operating condition for the single compressor in a household refrigerator is the lowest box temperature, which is typically A. 0F B. -20F C. 20F D. 40FWhat is the highest COP that a refrigerator operating between temperature levels TL and TH can have?Define the no refrigerator can have a higher COP than a reversible refrigerator operating between the same temperature limits.
- . A carnot heat engine with thermal efficiency of 70% is supplied with heat at a rate of 800 kJ/min. If it is coupled to a carnot heat pump to deliver 1800 kJ/min of heating, determine the COP and temperature outside the house if it is maintained at 24CA heat pump with refrigerant-134a as the working fluid is used to keep a space at 25°C byabsorbing heat from geothermal water that enters the evaporator at 50°C at a rate of0.065 kg/s and leaves at 40°C. Refrigerant enters the evaporator at 20°C with a quality of15 percent and leaves at the same pressure as saturated vapor. If the compressorconsumes 1.2 kW of power, determine (a) the mass flow rate of the refrigerant, (b) therate of heat supply to the space, (c) the COP, and (d) the minimum power input to thecompressor for the same rate of heat supply.A heat pump cycle is executed with R–134a under the saturation dome between the pressure limits of 1.2 and 0.16 MPa. The maximum coefficient of performance of this heat pump is (a) 5.7 (b) 5.2 (c) 4.8 (d) 4.5 (e) 4.1
- A heat engine has a total heat input of 1.3 kJ and a thermal efficiency of 35 percent. How much work will it produce?A cycle heat engine does 50 kJ of work per cycle If the efficiency of the heat engine is 75% The heat rejected per cycle is....A heat pump with refrigerant-134a as the working fluid is used to keep a space at 25°C by absorbing heat from geothermal water that enters the evaporator at 60°C at a rate of 0.065 kg/s and leaves at 40°C. Refrigerant enters the evaporator at 12°C with a quality of 15 percent and leaves at the same pressure as saturated vapor. If the compressor consumes 1.6 kW of power, determine the COP.
- You have a refrigerator in your garage. Does it perform differently in the summer than in the winter?Explain.A heat pump (HP) is used to heat a house and maintain it at 24 °C. On a winter day when the outdoor air temperature is -5 °C, the house is estimated to lose heat at a rate of 80,000 kJ/h. Determine the minimum power required (????,??) to operate this heat pump.What is the COP of the Carnot refrigerator if the COP of the Carnot heat pump is 2.3 where two cycles are operation between identical reservoirs?