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.
Homework Answers
please
ask if anything else.Add Answer to:
A heat pump is used to heat a house and maintain it at 24°C. On
a...
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 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...
A house uses a heat pump to maintain the indoor temperature at 22 C on a...
A house uses a heat pump to maintain the indoor temperature at 22 C on a cold winter day when the outside temperature is -10 C. On this day, the house receives heat from the heat pump at a rate of 24 kW. Is it possible for this heat pump to operate at 2.5 kW? Justify your answer.
6-104 A Camot heat pump is to be used to bcat a house and nutintain it...
6-104 A Camot heat pump is to be used to bcat a house and nutintain it at 25% in winter. On a day which the average outdoor temperature remains at about 2'C, the house is esti- mated to lose heat at a rate of 55,000 Jh. Iſ the heat pump consumes 4.8 kW of power while operating, determine (a) how long the heat pump ran on that day: (b) the toul heating costs, assuming an average price of 11e/kWh for...
An ideal heat pump is used to maintain the inside temperature of a house at Tin...
An ideal heat pump is used to maintain the inside temperature of a house at Tin = 20 ∘C when the outside temperature is Tout. Assume that when it is operating, the heat pump does work at a rate of 1700 W . Also assume that the house loses heat via conduction through its walls and other surfaces at a rate given by (650W/∘C)(Tin−Tout). For what outside temperature would the heat pump have to operate at all times in order...
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...
termo QUESTION 4 (a) Derive and expression for the coefficient of performance (COP) of a completely...
termo
QUESTION 4 (a) Derive and expression for the coefficient of performance (COP) of a completely reversible heat pump in terms of the thermal energy reservoir, high temperatures T, and low temperature 1, respectively. Draw a diagram that support the COP derivation. [7 marks] (b) A Heat Pump (HP) is to be used for heating a bouse in winter as illustrated in Figure Q4(b). The house is to be maintained at 26°C at all times. When the temperature outdoors drop...
(d) Figure Q3 shows an air-conditioner is used to maintain a house at 15 °C by...
(d) Figure Q3 shows an air-conditioner is used to maintain a house at 15 °C by removing the heat from the house to the outside air at a temperature of 30 °C. The house is estimated to gain heat at a rate of 200,000 kJ/h. The air- conditioner consumes 5 kW of electric power when running. Analyse if the air-conditioner is powerful enough to perform the task. (10 marks) [Total : 25 marks] Air- cond 30 °C 15 °C 200,000...
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...
EXAM 3B 1. The Carnot heat engine receives 6500 kJ/h of heat from a boiler at...
EXAM 3B 1. The Carnot heat engine receives 6500 kJ/h of heat from a boiler at 950 °C and rejects the waste heat to a well at 20°C. The produced power output of heat engine is fully used to operate the heat pump that draws the heat from the outdoor environment and transfers it to warm the house at the rate of 1100 kJ/min. If the house is maintained at 23°C, what is the lowest temperature of outdoor environment? (6...
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 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...
6-104 A Camot heat pump is to be used to bcat a house and nutintain it at 25% in winter. On a day which the average outdoor temperature remains at about 2'C, the house is esti- mated to lose heat at a rate of 55,000 Jh. Iſ the heat pump consumes 4.8 kW of power while operating, determine (a) how long the heat pump ran on that day: (b) the toul heating costs, assuming an average price of 11e/kWh for...
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...
termo
QUESTION 4 (a) Derive and expression for the coefficient of performance (COP) of a completely reversible heat pump in terms of the thermal energy reservoir, high temperatures T, and low temperature 1, respectively. Draw a diagram that support the COP derivation. [7 marks] (b) A Heat Pump (HP) is to be used for heating a bouse in winter as illustrated in Figure Q4(b). The house is to be maintained at 26°C at all times. When the temperature outdoors drop...
(d) Figure Q3 shows an air-conditioner is used to maintain a house at 15 °C by removing the heat from the house to the outside air at a temperature of 30 °C. The house is estimated to gain heat at a rate of 200,000 kJ/h. The air- conditioner consumes 5 kW of electric power when running. Analyse if the air-conditioner is powerful enough to perform the task. (10 marks) [Total : 25 marks] Air- cond 30 °C 15 °C 200,000...
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...
EXAM 3B 1. The Carnot heat engine receives 6500 kJ/h of heat from a boiler at 950 °C and rejects the waste heat to a well at 20°C. The produced power output of heat engine is fully used to operate the heat pump that draws the heat from the outdoor environment and transfers it to warm the house at the rate of 1100 kJ/min. If the house is maintained at 23°C, what is the lowest temperature of outdoor environment? (6...
Most questions answered within 3 hours.
-
help me and discuss one successful and one
unsuccessful international company/busines in Indonesia.whyit
succeed and why...
asked 1 minute ago -
I- Choose the best answer
Which of the following statements about the structure and
packaging of...
asked 2 minutes ago -
1. A sample of 144 incoming freshman found that 45 of them
scored more than 550...
asked 9 minutes ago -
Kc is 2.35 × 1018 at 25 °C for the formation of iron(III)
oxalate complex ion....
asked 10 minutes ago -
Team Values – Discuss as a team what values are important.
Develop a statement or itemised...
asked 22 minutes ago -
C# Visual Studio -The local driver's license
office has asked you to create an application that...
asked 27 minutes ago -
An economy has a per worker production function y=k^1/4, a
marginal propensity to save of 24%,...
asked 31 minutes ago -
You are the Human Resource Officer in your company. You have
been asked to present to...
asked 35 minutes ago -
2. Consider the following application description for a
publishing firm, and translate all of the information...
asked 39 minutes ago -
The manager is seeking to maximize profit. Based on the current
price of $550 per surfboard,...
asked 44 minutes ago -
The population standard deviation (σ) is 2 for a standardized
achievement test that is normally distributed....
asked 48 minutes ago -
What is the future value of 650 after 16 years under 24% annual
compounding? Semiannual compounding?...
asked 49 minutes ago