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P4.4 An air-conditioning unit, operating on a reversed Carnot cycle, is used to keep a house...
Question 1 (10 marks) As shown in Fig. Q1, a house is cooled by an air...
Question 1 (10 marks) As shown in Fig. Q1, a house is cooled by an air conditioning system to maintain the temperature inside the house to be 25 °C during the summer. When the ambient temperature outside is 45 °C, the rate at which heat is transferred to the house is estimated to be Qleak .u HP 30 kW 1.1 Calculate the coefficient of performance (COP) of this air conditioning system if it operates on a Carnot cycle? Fig. Q1...
Wac (elec) The diagram depicts a portion of a DX air-conditioning system that provides cooling to...
Wac (elec) The diagram depicts a portion of a DX air-conditioning system that provides cooling to one zone in a building. The outdoor unit provides heat-rejection and includes the compressor and the condenser fan. The indoor-fan moves air from the conditioned zone, across the cooling coil, and then back to the conditioned zone. The indoor-fan (with directly coupled motor) is located within the air-stream. Electric power consumption of the indoor fan motor is denoted Wm. The electrical power supply for...
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)...
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...
11:38 3 of 6 MEN 211 Natre Dame Univenity Mechanical Engineering Dep An air conditioning system is composed of a cooling pat and a ming pat shown in the ollowing fgure. The cooling losd is ensure...
11:38 3 of 6 MEN 211 Natre Dame Univenity Mechanical Engineering Dep An air conditioning system is composed of a cooling pat and a ming pat shown in the ollowing fgure. The cooling losd is ensured by a retrigeration cycle opersting with retrigerant R. 134a Mod arst a pressure of 1 bar,atenperstue of35°C-are tive hundty ot 35 % ardo fow rate of 100 m3h is mbed with ar at 1 bar, 24°C.50% RH and S00 m3p, The mot e at...
1) A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated...
1) A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting its waste heat to cooling water that enters the condenser at 16 °C at a rate of 0.25 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 65°C and leaves at 42°C. The inlet state of the compressor is 60 kPa and -34°C and the compressor is estimated to gain a net heat of...
System Model: Automotive Air Conditioning System Outside Air Temp: 45 oC Car Interior Air Temp: 22...
System Model: Automotive Air Conditioning System Outside Air Temp: 45 oC Car Interior Air Temp: 22 oC Heat Load = 4.2 kJ/sec rate at which heat must go in to the air conditioner to be removed from the car’s interior Refrigerant: R134a HINT: Heat enters an air conditioning system where? Refrigerant 134a … - leaves the evaporator coil and enters the compressor as a saturated vapor at the evaporator pressure of 2.8 bars. - It leaves the compressor at...
Question 1 (10 marks) As shown in Fig. Q1, a house is cooled by an air conditioning system to maintain the temperature inside the house to be 25 °C during the summer. When the ambient temperature outside is 45 °C, the rate at which heat is transferred to the house is estimated to be Qleak .u HP 30 kW 1.1 Calculate the coefficient of performance (COP) of this air conditioning system if it operates on a Carnot cycle? Fig. Q1...
Wac (elec) The diagram depicts a portion of a DX air-conditioning system that provides cooling to one zone in a building. The outdoor unit provides heat-rejection and includes the compressor and the condenser fan. The indoor-fan moves air from the conditioned zone, across the cooling coil, and then back to the conditioned zone. The indoor-fan (with directly coupled motor) is located within the air-stream. Electric power consumption of the indoor fan motor is denoted Wm. The electrical power supply for...
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)...
11:38 3 of 6 MEN 211 Natre Dame Univenity Mechanical Engineering Dep An air conditioning system is composed of a cooling pat and a ming pat shown in the ollowing fgure. The cooling losd is ensured by a retrigeration cycle opersting with retrigerant R. 134a Mod arst a pressure of 1 bar,atenperstue of35°C-are tive hundty ot 35 % ardo fow rate of 100 m3h is mbed with ar at 1 bar, 24°C.50% RH and S00 m3p, The mot e at...
1) A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting its waste heat to cooling water that enters the condenser at 16 °C at a rate of 0.25 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 65°C and leaves at 42°C. The inlet state of the compressor is 60 kPa and -34°C and the compressor is estimated to gain a net heat of...
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