Heat Pump
5c. A heat pump is used to heat a house in the winter and cool it in the summer. The loads are 5000W in the winter with a house temperature of 20º C and 4000W in the summer with a house temperature of 25º C. Determine the minimum electric power in both cases if the year-round temperature three meters below the ground is 10º C below the ambient temperature. State all assumptions made. (2 marks)
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Que.2a With suitable diagrams, describe the geothermal resource types 6 marks) b Show that the efficiency of a heat pump is higher in the heating mode than in the cooling mode. (2 marks) Que.2c A...
Que.2a With suitable diagrams, describe the geothermal resource types 6 marks) b Show that the efficiency of a heat pump is higher in the heating mode than in the cooling mode. (2 marks) Que.2c A heat pump is used to heat a house in the winter and cool it in the summer. The loads are 5000W in the winter with a house temperature of 20° C and 4000W in the summer with a house temperature of 25° C. Determine the...
A heat pump is to be used to heat a house in winter and then reversed...
A heat pump is to be used to heat a house in winter and then
reversed to cool the house in summer. The interior space is to be
maintained at 20oC. Heat transfer through walls and roof is
estimated to be χ = 0.525 kJ/sec per degree difference in
temperature between inside and outside. (6a) (8p) In winter if the
outside temperature is 5oC, what is the minimum power required to
drive the heat pump? (6b) (12p) For the same...
We propose to heat a house in the winter with a heat pump. The house is...
We propose to heat a house in the winter with a heat pump. The house is to be maintained at 20°C at all times. When the ambient temperature outside drops to -10°C, the rate at which heat is lost from the house is estimated to be 25 kW. What is the minimum electrical power (in kW) required to drive the heat pump? Use the correct sign convention to indicate the direction of work. Hint: the minimum power happens with the...
Assignment Name: The second law of Thermodynamics for a heat pump Homework Purpose: Apply the second...
Assignment Name: The second law of Thermodynamics for a heat pump Homework Purpose: Apply the second law of Thermodynamies and Carnot cycle to a heat pump Task We propose to heat a house in the winter with a heat pump. The house is to be maintained at 20°C at l mes. When the ambient temperature outside drops to -10°C, the rate at which heat is lost from the house is estimated to be 25 kw. What is the minimum electrical...
02. [HW] Textbook problem 6-160 (6 marks) A heat pump receives heat from a lake that...
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A heat pump is used to heat a house and maintain it at 24°C. On a...
A heat pump is used to heat a house and maintain it at 24°C. On a winter day when the outdoor air temperature is -5°C (negative value), 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 if heat is extracted from (a) the outdoor air at -4 oC and (b) the well water at 12C.
A Stirling-engine is used in the heat-pump mode to heat a house. The engine maintains a...
A Stirling-engine is used in the heat-pump mode to heat a house. The engine maintains a temperature of 20.5 °C inside the house. The temperature of the Earth loop is 14.1 °C. (The Earth loop buried deep under the ground is the cold reservoir of this heat pump.) What is the coefficient of performance of this heat pump? Tries 0/12 If the power of the electric motor driving the heat pump is 157 W, then what is the rate at...
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...
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...
Anyone can help me with this question? 2 - Heat pump .The heat pump illustrated beside...
Anyone can help me with this question?
2 - Heat pump .The heat pump illustrated beside uses 1.5 kw mechanical power (that's is 1500 J/s) and extracts 1.2 million calories per hour from the outside air . A) How much heat is pumped into the house every day? .B) If this heat pump is made such that it is ideal and reversible, and you decide to heat your house with a gas furnace and use the heat pump as an...
Que.2a With suitable diagrams, describe the geothermal resource types 6 marks) b Show that the efficiency of a heat pump is higher in the heating mode than in the cooling mode. (2 marks) Que.2c A heat pump is used to heat a house in the winter and cool it in the summer. The loads are 5000W in the winter with a house temperature of 20° C and 4000W in the summer with a house temperature of 25° C. Determine the...
A heat pump is to be used to heat a house in winter and then
reversed to cool the house in summer. The interior space is to be
maintained at 20oC. Heat transfer through walls and roof is
estimated to be χ = 0.525 kJ/sec per degree difference in
temperature between inside and outside. (6a) (8p) In winter if the
outside temperature is 5oC, what is the minimum power required to
drive the heat pump? (6b) (12p) For the same...
We propose to heat a house in the winter with a heat pump. The house is to be maintained at 20°C at all times. When the ambient temperature outside drops to -10°C, the rate at which heat is lost from the house is estimated to be 25 kW. What is the minimum electrical power (in kW) required to drive the heat pump? Use the correct sign convention to indicate the direction of work. Hint: the minimum power happens with the...
Assignment Name: The second law of Thermodynamics for a heat pump Homework Purpose: Apply the second law of Thermodynamies and Carnot cycle to a heat pump Task We propose to heat a house in the winter with a heat pump. The house is to be maintained at 20°C at l mes. When the ambient temperature outside drops to -10°C, the rate at which heat is lost from the house is estimated to be 25 kw. What is the minimum electrical...
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...
Anyone can help me with this question?
2 - Heat pump .The heat pump illustrated beside uses 1.5 kw mechanical power (that's is 1500 J/s) and extracts 1.2 million calories per hour from the outside air . A) How much heat is pumped into the house every day? .B) If this heat pump is made such that it is ideal and reversible, and you decide to heat your house with a gas furnace and use the heat pump as an...
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