FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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A refrigeration system has a heat rejected of 430 kw.If COP is 7,find the mass chilled water in the evaporator for a temperature decrease of 16°℃.
Find the COP of heat pump operating between 300 K and 600K temperature. If the same temperature ranges are used in heat engine, find the efficiency.
A refrigerator cycle uses refrigerant R-134a and operates between a low-side pressure of 1.5 Bar and high side of 10 Bar. The power input to the compressor 1.88 Kw. find the refrigerant mass flow rate, condensing heat load, and COP of this machine
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- A computer lab filled with 20 computers and 15 students is cooled by an air conditioningunit on a day where it is 90 oF outside. The room temperature is 72 oF. Assume an averagestudent generate 90 W of heat and each computer generates 150 W of heat. If the COP ofthe air conditioner is 2.5, what power input is required, in kW? If the air conditioneroperated at its maximum coefficient of performance, what power input would be required?arrow_forwardFind the COP of heat pump operating between 1000K and 300Karrow_forwardDo fastarrow_forward
- Find COP of refrigerator and heat pump operating between temperatures 300 K and 900 Karrow_forward/Heat is transferred from a tank of water in a refrigerator at(OC) degrees to a tank of boiling water at (100 C) degrees. With a reversible machine (heat pump). Calculate the Heat drawn from the refrigerator. if it was The heat transferred to the tank of boiling water is 2254kJ.arrow_forwardWater at 55°C is cooled in a The temperature of the surrounding air is from the condenser is 2,300,000 kJ/h. Find the capacity in liters per second of the pump used in the cooling tower. cooling tower which has 32°C dry bulb and 70% RH. an efficiency of 65%. The heat dissipatearrow_forward
- If COP of heat pump is 4, find the efficiency of heat engine working between the same temperature range.arrow_forwardplease answer all and with complete solutions. thank you.arrow_forwardA Factory uses a vapor absorption refrigerator to cool its products, the heat is supplied to generator by steam at 150 C (hfg=2500kJ/kg) and 90% dry. The temperature of the evaporator is to be maintained at -5 C. the refrigeration capacity is 20 Tonnes and actual COP is 70% of the maximum, atmospheric Pressure is 1 bar and ambient temperature 30 C. find the maximum COP. mass of steam per hourarrow_forward
- Find the COP of refrigerator working between temperatures 350 K and 1050 K. What will be efficiency of heat engine operating in same temperature range?arrow_forwardIn a steam turbine steam at 20 bar, 360°C is expanded to 0.08 bar. It then enters a condenser, where it is condensed to saturated liquid water. The pump feeds back the water into the boiler. Assume ideal processes, find per kg of steam the net work and cycle efficiency.arrow_forwardSolve fast..arrow_forward
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