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Question 1 (10 marks) As shown in Fig. Q1, a house is cooled by an air...
P4.4 An air-conditioning unit, operating on a reversed Carnot cycle, is used to keep a house...
P4.4 An air-conditioning unit, operating on a reversed Carnot cycle, is used to keep a house at 20°C in an environment at 45°C. The electric power input to the unit is 3.5 kW. Determine the COP of the air conditioning unit, and the rate of cooling in kW and in Btu/h. P4.5_F U Cooling P4.6 . mine the minimum post Question the same me ol coolin. PAT
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...
PLEASE PROVIDE STEP-BY-STEP SOLUTION WITH EXPLANATION: ANSWERS Question 1 (40 marks) An initial design calculation is...
PLEASE PROVIDE STEP-BY-STEP SOLUTION WITH
EXPLANATION:
ANSWERS
Question 1 (40 marks) An initial design calculation is to be undertaken for a large refrigeration plant that will service a frozen goods warehouse. The warehouse is to be kept at a temperature of -20.0°C and the total refrigeration heat load is 1.50 MW. The refrigeration system is to reject heat to the ambient air at 30.0°C and operate with a discharge pressure of 1.60 MPa and a suction pressure of 60.0 kPa...
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...
An Air conditioner maintains a house temperature of 23C while outside temp is 50C. If gbe...
An Air conditioner maintains a house temperature of 23C while outside temp is 50C. If gbe refrigeration cycle removes 8kw from the house and compressor does 2 hp of work on the refrigerent. determine 1. the heat rejected to the outside environment in kw? 2. the actual coefficient of performance for A/C unit 3. the max possible cop
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...
Probleml An air comditionot with R-134m as the working laido maintains a house at a constant...
Probleml An air comditionot with R-134m as the working laido maintains a house at a constant temperature of 25 0C durisg the summer. The minumats temperdiure in the air conditioner cycle is-S°C, and the maximum temperatire in the air conditioner cycle is eqaivalent to the outside tempcrature. The house gains beat froth the walls and windows at 95,000 kJh when the outside temperature is 35 C, and the people, lighits, and appliances in the house geoerate 7,000 kJh What is...
4. A water chiller provides 100 tons 3.516 kw/ton of refrigeration to cool water to a...
4. A water chiller provides 100 tons 3.516 kw/ton of refrigeration to cool water to a temperature of 12.10 C for an air conditioning system. The heat extracted from the water is to be rejected in a cooling tower at 35.4°C, Assuming that the chiller operates on an ideal vapour refrigeration cycle with the temperature in the evaporator equal to the chilled water temperature and the saturation temperature in the condenser equal to the cooling tower water temperature, determine (a)...
A home's temperature is maintained at 25°C by an AC system with a COP of 3.2...
A home's temperature is maintained at 25°C by an AC system with a COP of 3.2 which cools outside air (38°C with a 30°C Wet Bulb) to 10 C and injects the cooled air into the home. The 25 C air exits the home. A) draw the process on the attached psychrometric chart. B) If the home gains 50,000 KJ/hr what is the required power in kW? C) How much water is condensed if any? D) Without changing the COP...
4. Refrigeration and air conditioning is quite useful, but it is, in effect, a way to move heat f...
4. Refrigeration and air conditioning is quite useful, but it is, in effect, a way to move heat from a low temperature to a high temperature. Is this possible, given the second law? Answer the following questions below, for R-134a (a common refrigerant), and then state whether you believe refrigeration violates the second law, and why (or why not) a. R-134a arrives to the inside of the refrigerator that you are trying to keep cooled to T- 4°C. The air...
P4.4 An air-conditioning unit, operating on a reversed Carnot cycle, is used to keep a house at 20°C in an environment at 45°C. The electric power input to the unit is 3.5 kW. Determine the COP of the air conditioning unit, and the rate of cooling in kW and in Btu/h. P4.5_F U Cooling P4.6 . mine the minimum post Question the same me ol coolin. PAT
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...
PLEASE PROVIDE STEP-BY-STEP SOLUTION WITH
EXPLANATION:
ANSWERS
Question 1 (40 marks) An initial design calculation is to be undertaken for a large refrigeration plant that will service a frozen goods warehouse. The warehouse is to be kept at a temperature of -20.0°C and the total refrigeration heat load is 1.50 MW. The refrigeration system is to reject heat to the ambient air at 30.0°C and operate with a discharge pressure of 1.60 MPa and a suction pressure of 60.0 kPa...
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...
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...
Probleml An air comditionot with R-134m as the working laido maintains a house at a constant temperature of 25 0C durisg the summer. The minumats temperdiure in the air conditioner cycle is-S°C, and the maximum temperatire in the air conditioner cycle is eqaivalent to the outside tempcrature. The house gains beat froth the walls and windows at 95,000 kJh when the outside temperature is 35 C, and the people, lighits, and appliances in the house geoerate 7,000 kJh What is...
4. A water chiller provides 100 tons 3.516 kw/ton of refrigeration to cool water to a temperature of 12.10 C for an air conditioning system. The heat extracted from the water is to be rejected in a cooling tower at 35.4°C, Assuming that the chiller operates on an ideal vapour refrigeration cycle with the temperature in the evaporator equal to the chilled water temperature and the saturation temperature in the condenser equal to the cooling tower water temperature, determine (a)...
A home's temperature is maintained at 25°C by an AC system with a COP of 3.2 which cools outside air (38°C with a 30°C Wet Bulb) to 10 C and injects the cooled air into the home. The 25 C air exits the home. A) draw the process on the attached psychrometric chart. B) If the home gains 50,000 KJ/hr what is the required power in kW? C) How much water is condensed if any? D) Without changing the COP...
4. Refrigeration and air conditioning is quite useful, but it is, in effect, a way to move heat from a low temperature to a high temperature. Is this possible, given the second law? Answer the following questions below, for R-134a (a common refrigerant), and then state whether you believe refrigeration violates the second law, and why (or why not) a. R-134a arrives to the inside of the refrigerator that you are trying to keep cooled to T- 4°C. The air...
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