7.1(20%) A Carnot heat engine transfers 13.5 kW of waste heat output to low-temperaturethe energy reservoir which is at 15°C. The net power output from the heat generator is 16.5 kW.The power output (Wut, net) from the heat generator is transferred without loss to a Carnot heat pump.The heat pump transfers energy from the heat generator's low-temperature energy reservoir to an energyreservoir with a constant temperature of 50°C.termiskenergireservoarОнукмCarnot-varmekraft-maskinLVKMшлепоtermisktermiskenergireservoarTRYPQH.NPCarnot-varmepumpeQLVPenergireservoarT₁a) What power does the Carnot thermal power engine receive from the heat source in kW and what temperature is itthe heat source in "C?b) What power factor does this Carnot heat pump have and what heat output does it deliver to the areawith 50°C temperature?

Step 1:We have given that,Waste heat output QL= 13.5 kWNet power output from the heat Generator:…

Answered: 7.1 (20%) A Carnot heat engine…

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.46P

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Refrigerators currently being manufactured in the United States are using______as their refrigerant.
The operating condition for the single compressor in a household refrigerator is the lowest box temperature, which is typically A. 0F B. -20F C. 20F D. 40F
An irreversible heat pump with COP of 2.4 is used to heat water to 80°C for cleaning purposes. This heat pump absorbs heat from surrounding at 30°C and received the entire power, W from a Carnot heat engine operating between 250°C and 30°C. The Canot heat engine received 6.3 kW of heat from the high temperature source. i) Draw the schematic diagram of the above system. ii) Determine the power received by the heat pump, W from Carnot heat engine, kW. i1) Calculate the rate of heat supplied to the water by the heat pump, kW. iv) Determine the COP of the heat pump if it operates on a reversed Carnot cycle.
A heat pump operates on a Carnot heat pump cycle with a COP of 8.97. It keeps a space at 29.03 C by consuming 2.59 kW of power. Determine the heating load (kW) provided by the heat pump. (Use 2 decimal places for the final answer.)
(b) An irreversible heat pump with COP of 2.4 is used to heat water to 80°C for cleaning purposes. This heat pump absorbs heat from surrounding at 30°C and received the entire power, W from a Carnot heat engine operating between 250°C and 30°C. The Carnot heat engine received 6.3 kW of heat from the high temperature source. i) Draw the schematic diagram of the above system. ii) Determine the power received by the heat pump, W from Carnot heat engine, kW. iii) Calculate the rate of heat supplied to the water by the heat pump, kW. iv) Determine the COP of the heat pump if it operates on a reversed Carnot cycle.
What would be the maximum COP for a heat pump operating in your house if the outside temperature is 55 F? Draw a heat flow diagram. How much cheaper will this be than electrical heating?
B) A reversible heat engine operates between two reservoirs at temperatures of 600°C and 40°C. The engine drives a reversible refrigerator which operates between reservoirs at temperatures of 40°C and -20°C. The heat transfer to the heat engine is 2000 kJ and the net work output for the combined engine refrigerator is 360 kJ. (i) Calculate the heat transfer to the refrigerant and the net heat transfer to the reservoir at 40°C. (ii) Reconsider (i) given that the efficiency of the heat engine and the C.O.P. of the refrigerator are each 40 per cent of their maximum possible values.
A heat pump operates on a Carnot heat pump cycle with a COP of 8.89. It keeps a space at 27.39 C by consuming 2.41 kW of power. Determine the heating load (kW) provided by the heat pump.
A heat pump with COP of 2.0 is used to heat water to 90 oC for cleaning purpose. This heat pump absorb heat from surrounding at 30 oC and received the entire power, ̇ from a Carnot heat engine operating between 200 oC and 25 oC. The Carnot heat engine received 6.3 kW of heat from the high temperature source. i) Draw the schematic diagram of the above system. ii) Determine the power received by the heat pump, ̇ from Carnot heat engine, kW. iii) Calculate the rate of heat supplied to the water by the heat pump, kW. iv) Determine the COP of the heat pump if it operates on a reversed Carnot cycle.
A heat engine operates between two reservoirs at 800 and 20oC. Onehalf of the work output of the heat engine is used to drive a Carnot heatpump that removes heat from the cold surrounding at 2oC and transfersit to a house maintained at 22oC.If the house is losing heat at a rate of 62,000 kJ/h,Determine:a) The minimum rate of heat supply (kJ/h) to the heat enginerequired to keep the house at 22oC. b) The thermal efficiency of the heat engine, if the rate of heatsupply to the heat engine is 15,000 kJ/h. c) The total amount of entropy change of the surrounding by takinginto account both the heat engine and Carnot heat pump for the casesof i) and ii), respectively. d) The cyclic entropy change of the heat engine for the cases of i) andii), respectively.
(9) The coefficient of performance of a residential heat pump is 2.85. If the input power to this heat pump is 2.7 kW, Calculate the rate of heat supply to the house, in kJ/h.
A Carnot heat engine receives heat from a reservoir at 900⁰C at a rate of 700 kJ/min and rejects the waste heat to the ambient air at 27⁰C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -5⁰C and transfers it to the same ambient air at 27⁰C. Determine a) the maximum rate of heat removal from the refrigerated space and a) the total rate of heat rejection to the ambient air. Pls include illustration of cycle.

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