Refrigerant vapor rejects 70 kW of heat as it passes through an air-cooled condenser. Thecondenser has an air-side area of 210 m2 and based on this area, has an overall heat transfercoefficient of 0.037 kW/m?.°C. Cooling air flows at a rate of 7.59 kg/s. If condensation of therefrigerant occurs at 55°C, what is the inlet temperature (in °C) of the air? Take the specific heatof air to be 1.02 kJ/kg.°C.Round your answer to 2 decimal places.

given that: Q˙ = 70 kW A = 210 m2 U = 0.037 kW/m2 oC m˙ = 7.59 kg/s cpair = 1.02 kJ/kg-oC…

Answered: refrigerant occurs at 55°C, what is the…

refrigerant occurs at 55°C, what is the inlet temperature (in °C) of the air? Take the specific heat of air to be 1.02 kJ/kg.°C. Round your answer to 2 decimal places.

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

Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems

Section: Chapter Questions

Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

Refrigerant vapor rejects 70 kW of heat as it passes through an air-cooled condenser. The
condenser has an air-side area of 210 m2 and based on this area, has an overall heat transfer
coefficient of 0.037 kW/m?.°C. Cooling air flows at a rate of 7.59 kg/s. If condensation of the
refrigerant occurs at 55°C, what is the inlet temperature (in °C) of the air? Take the specific heat
of air to be 1.02 kJ/kg.°C.
Round your answer to 2 decimal places.

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