3. An oil heater heats 100 kg per minute of oil from 30°C to 100°C in a counter-flow heat exchanger. The average specific heat of the oil is 2.5 k]/kg-"C. Exhaust gases used for heating enter the heater with an average specific heat of 1 kJ/kg-'C, a mass flow rate of 200 kg/min and an initial temperature of 200'C. The overall heat transfer coefficient is 80 W/m2 -C. Determine the heating surface area in m2.

3. An oil heater heats 100 kg per minute of oil from 30°C to 100°C in a counter-flow heat exchanger. The average specific heat of the oil is 2.5 k]/kg-"C. Exhaust gases used for heating enter the heater with an average specific heat of 1 kJ/kg-'C, a mass flow rate of 200 kg/min and an initial temperature of 200'C. The overall heat transfer coefficient is 80 W/m2 -C. Determine the heating surface area in m2.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter44: Geothermal Heat Pumps

Section: Chapter Questions

Problem 13RQ: If 14 gpm of water is flowing through an open-loop heat pump with a temperature difference of 7F,...

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The function of the pressure tank in an open-loop, geo-thermal heat pump well system is to prevent the well pump from _____.
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If 14 gpm of water is flowing through an open-loop heat pump with a temperature difference of 7F, how much heat in Btu/h is being absorbed or rejected in the heat pump? Show all work and units.
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Welded ______sealed compressors are normally used in household refrigerators.
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(b) Determine the cooling load (q₁), heat rejection (q) and actual compressor work input (w) per unit mass in kJ/kg. . C. (c) Calculate the coefficient of performance (COP) of this actual refrigeration cycle and compare it with the COP of a reversed Carnot cycle for refrigeration if used under the same inside and outside amblent temperatures.
Can you please help me with question 3
The condenser of a room air conditioner is designedto reject heat at a rate of 15,000 kJ/h from refrigerant-134aas the refrigerant is condensed at a temperature of 408C. Air(cp 5 1005 J/kg?K) flows across the finned condenser coils,entering at 258C and leaving at 358C. If the overall heat transfer coefficient based on the refrigerant side is 150 W/m2?K,determine the heat transfer area on the refrigerant side.
Pls help me thankss