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At steady state, a heat pump provides 30,000 Btu/h to maintain a dwelling at 68°F on...
Needed help in this question! URCES Problem 5.64 At steady state, a heat pump provides 30,000...
Needed help in this question!
URCES Problem 5.64 At steady state, a heat pump provides 30,000 Btu/h to maintain a dwelling at 68°F on a day when the outside temperature is 50°F. The power input to the heat pump is 5 hp. If electricity costs 8 cents per kW h, compare the actual operating cost with the minimum theoretical operating cost for each day of operation. The actual operating cost: $/day. The minimum theoretical operating cost: $/day. By accessing this...
A heat pump maintains a dwelling at 68 F. When operating steadily, the power input to...
A heat pump maintains a dwelling at 68 F. When operating steadily, the power input to the heat pump is 5 hp, and the heat pump receives energy by heat transfer from 55 F well water at a rate of 500 Btu/min. determine the coefficient of performace. Evaluating electricity at $ 0.10 per kW.h determine the cost in a a month when the heat pump operates for 300 hours.
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...
A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW.
Problem 2) A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW. (a) Determine the net power required to operate the heat pump, in kW. (b) Evaluating electricity at $0.08 per determine the cost of electricity in a month when the heat pump operates for 200 hours. Problem 3) A power cycle receives energy by heat transfer from the combustion of fuel at a rate of 300 MW. The thermal efficiency...
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...
3. A cold storage facility is maintained at 20°F when the outside air temperature is 90°RF...
3. A cold storage facility is maintained at 20°F when the outside air temperature is 90°RF by an air conditioning unit operating as a cycle at steady state. The unit must remove 120,000 Btu/h continuously from the facility to maintain the required indoor temperature, and has a power input of 20 hp Determine: the actual coefficient of the air conditioning unit the minimum theoretical horsepower that would be required to operate a cooling unit under these conditions. (1hp 2545 Btu/h)...
At steady state, a heat pump driven by an electric motor maintains the interior of a...
At steady state, a heat pump driven by an electric motor maintains the interior of a building at TH = 293 K. The rate of heat transfer, in kJ/h, from the building through its walls and roof is given by 8000(TH - TC), where TC is the outdoor temperature. Determine the minimum electric power, in kW, required to drive the heat pump for TC = 255 K.
During winter time a heat pump is operating on a heating mode to maintain a living...
During winter time a heat pump is operating on a heating mode to maintain a living room at 23oC during which the outside temperature is -5oC. The system is using R134a as a working fluid. The refrigerant leaves the condenser at 28oC and enters a compressor at -10oC. The refrigerant flow rate is 0.12kg/s. Assume an ideal VCC to evaluate the system and report the followings: a. Process diagram b. Heating capacity kJ/hr c. Coefficient of performance of the system...
US PRINTER VERSİON "ACKIC I Problem 5.044 SI A heat pump cycle is used to maintain...
US PRINTER VERSİON "ACKIC I Problem 5.044 SI A heat pump cycle is used to maintain the intenior of a building at 20°C. At steady state, the heat pump receives energy by 9eC and discharges energy by heat transfer to the building at a rate of 120,000 k/h. Over a period of 14 days, an electric meter records that 2000 kw-h of electricity is provided to the heat pump. Determine: (a) the amount of eneroy that the heat pump receives...
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...
Needed help in this question!
URCES Problem 5.64 At steady state, a heat pump provides 30,000 Btu/h to maintain a dwelling at 68°F on a day when the outside temperature is 50°F. The power input to the heat pump is 5 hp. If electricity costs 8 cents per kW h, compare the actual operating cost with the minimum theoretical operating cost for each day of operation. The actual operating cost: $/day. The minimum theoretical operating cost: $/day. By accessing this...
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...
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...
3. A cold storage facility is maintained at 20°F when the outside air temperature is 90°RF by an air conditioning unit operating as a cycle at steady state. The unit must remove 120,000 Btu/h continuously from the facility to maintain the required indoor temperature, and has a power input of 20 hp Determine: the actual coefficient of the air conditioning unit the minimum theoretical horsepower that would be required to operate a cooling unit under these conditions. (1hp 2545 Btu/h)...
US PRINTER VERSİON "ACKIC I Problem 5.044 SI A heat pump cycle is used to maintain the intenior of a building at 20°C. At steady state, the heat pump receives energy by 9eC and discharges energy by heat transfer to the building at a rate of 120,000 k/h. Over a period of 14 days, an electric meter records that 2000 kw-h of electricity is provided to the heat pump. Determine: (a) the amount of eneroy that the heat pump receives...
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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