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Problem 3 A home in a Midwestern city is being heated with a heat pump in...
2. A heat pump is operated to maintain a home at 25 °C when the outside temperature is only -5 °C...
2. A heat pump is operated to maintain a home at 25 °C when the outside temperature is only -5 °C. (a) If the house requires 50 kW heat, what is the power required for the heat pump? Assume the heat pump to be a Carnot heat pump (b) If an electric heater was used for this purpose instead, assuming an electric current of 5A, what would be the required resistance of the heater? (c) If electricity costs 10 cents...
On a cold winter day where the outside temperature is -10o C, a heat pump provides...
On a cold winter day where the outside temperature is -10o C, a heat pump provides 20 kW to heat a house to 20o C. The heat pump has a COPHP of 4 at the maximum power. The next day a storm brings the outside temperature down to −15o C. If the ratio of COPHP and the reversible COPrev for day 1 and day 2 is the same, COPHP for both days is the same, and that the house loses...
- R134a in an ideal vapor compression heat pump generates 35 kW to heat a room....
- R134a in an ideal vapor compression heat pump generates 35 kW to heat a room. A mixture of 95% quality enters the compressor at 0.6 bar and saturated liquid exits the condenser at 14 bar. Determine: a) Mass flow rate (kg/hr) b) Compressor power (kJ/min) c) Heat transferred from outside (kW) d) Coefficient of performance
1. R134a in a vapor compression heat pump generates 35 kW of heat to a cold...
1. R134a in a vapor compression heat pump generates 35 kW of heat to a cold room. Saturated vapor enters the compressor at 1.6 bar and saturated liquid exits the condenser at 8 bar. Assuming 75% isentropic efficiency for the compressor, determine: a) Mass flow rate (kg/s) b) Compressor power (kW) c) Heat transfer from the outside d) Coefficient of performance
R134a in an ideal vapor compression heat pump generates 35 kW to heat a room. A...
R134a in an ideal vapor compression heat pump generates 35 kW to heat a room. A mixture of 95% quality enters the compressor at 0.6 bar and saturated liquid exits the condenser at 14 bar. Determine: a) Mass flow rate (kg/hr) b) Compressor power (kJ/min) c) Heat transferred from outside (kW) d) Coefficient of performance We aim (haahi) Qinam = ni Chi-hu)
Problem #3 Refrigerant R-134a enters the condenser of a heat pump at 1000 kPa and 80°C...
Problem #3 Refrigerant R-134a enters the condenser of a heat pump at 1000 kPa and 80°C at a rate of 0.025 kg/s and leaves at 1000 kPa as saturated liquid. If the compressor consumes 2 kW of power, determine: a) The COP of the heat pump (as heating device). b) The rate of heat absorption from the outside air. тан Condenser Throttling valve Compressor Evaporator To
02. [HW] Textbook problem 6-160 (6 marks) A heat pump receives heat from a lake that...
02. [HW] Textbook problem 6-160 (6 marks) A heat pump receives heat from a lake that has an average winter time temperature of 6°C and supplies heat into a house having an average temperature of 27° C. (a) If the house loses heat to the atmosphere at a rate of 64000 kJ/h, determine the minimum power supplied to the heat pump, in kW. (b) A heat exchanger is used to transfer the energy from the lake water to the heat...
5, (25 points) A Carnot heat pump is used to maintain a house at 20 °C...
5, (25 points) A Carnot heat pump is used to maintain a house at 20 °C in winter and consumes 8 kW of power (electricity) when operating. On a day temperature outside the house is -3 °C, the house is estimated to lose heat at an average rate of 80,000 kJ/h. (Sa). (2p) Please identify the hot reservoir and the cool reservoir of this heat pump. (5b). (2p) Please draw of schematic diagram of this heat pump-house heating system with...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
2. A heat pump is operated to maintain a home at 25 °C when the outside temperature is only -5 °C. (a) If the house requires 50 kW heat, what is the power required for the heat pump? Assume the heat pump to be a Carnot heat pump (b) If an electric heater was used for this purpose instead, assuming an electric current of 5A, what would be the required resistance of the heater? (c) If electricity costs 10 cents...
- R134a in an ideal vapor compression heat pump generates 35 kW to heat a room. A mixture of 95% quality enters the compressor at 0.6 bar and saturated liquid exits the condenser at 14 bar. Determine: a) Mass flow rate (kg/hr) b) Compressor power (kJ/min) c) Heat transferred from outside (kW) d) Coefficient of performance
1. R134a in a vapor compression heat pump generates 35 kW of heat to a cold room. Saturated vapor enters the compressor at 1.6 bar and saturated liquid exits the condenser at 8 bar. Assuming 75% isentropic efficiency for the compressor, determine: a) Mass flow rate (kg/s) b) Compressor power (kW) c) Heat transfer from the outside d) Coefficient of performance
R134a in an ideal vapor compression heat pump generates 35 kW to heat a room. A mixture of 95% quality enters the compressor at 0.6 bar and saturated liquid exits the condenser at 14 bar. Determine: a) Mass flow rate (kg/hr) b) Compressor power (kJ/min) c) Heat transferred from outside (kW) d) Coefficient of performance We aim (haahi) Qinam = ni Chi-hu)
Problem #3 Refrigerant R-134a enters the condenser of a heat pump at 1000 kPa and 80°C at a rate of 0.025 kg/s and leaves at 1000 kPa as saturated liquid. If the compressor consumes 2 kW of power, determine: a) The COP of the heat pump (as heating device). b) The rate of heat absorption from the outside air. тан Condenser Throttling valve Compressor Evaporator To
02. [HW] Textbook problem 6-160 (6 marks) A heat pump receives heat from a lake that has an average winter time temperature of 6°C and supplies heat into a house having an average temperature of 27° C. (a) If the house loses heat to the atmosphere at a rate of 64000 kJ/h, determine the minimum power supplied to the heat pump, in kW. (b) A heat exchanger is used to transfer the energy from the lake water to the heat...
5, (25 points) A Carnot heat pump is used to maintain a house at 20 °C in winter and consumes 8 kW of power (electricity) when operating. On a day temperature outside the house is -3 °C, the house is estimated to lose heat at an average rate of 80,000 kJ/h. (Sa). (2p) Please identify the hot reservoir and the cool reservoir of this heat pump. (5b). (2p) Please draw of schematic diagram of this heat pump-house heating system with...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
In a vapor-compression refrigeration heat pump cycle with Refrigerant 134a as the working fluid provides heating at a rate of 15 kW to maintain a building at 20 °C year-round. During the heating mode in the winter, the outside temperature is 5 °C. It is also used for cooling in the summer when outside temperature is 34 °C. Saturated vapor at 2.4 bar leaves the evaporator and superheated vapor at 8 bar leaves the compressor. There is no significant heat...
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