The condenser of a room air conditioner is designed to reject heat at a rate of 15,000 kJ/h from refrigerant-134a as the refrigerant is condensed at a temperature of 40°C. Air (cp = 1005 J/kg·K) flows across the finned condenser coils, entering at 25°C and leaving at 35°C. 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.

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Q: A fluid is flowing through a heat exchanger (HEX) at a rate of 2500 kg/h. The heat exchanger…

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Q: Pravinbhai

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Q: What is refrigeration capacity? How can we calculate refrigeration capacity in condensing systems?

A: Refrigeration capacity -  Refrigeration capacity of a refrigeration system is the measure of…

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Q: ! Required information Consider a water-to-water counterflow heat exchanger with these…

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Q: A steam enters the condenser with an enthalpy of 2234 kJ/kg. If the condensed steam leaves t…

A: Given:h1=2234 KJ/Kgh2=321 KJ/KgQ=5000 KW

Q: A surface condenser with a cooling surface area of 244.31 m² is supplied with 3475 gal/min of…

A: (a) Write the mass flow rate of cooling water.   m˙w=3475 gal/min=3475 gal/min×1 kg/s15.85…

Q: Background: A chiller with a refrigerant flow rate of 50 lb/min (0.378 kg/s) of R-134a has a suction…

A: Refrigerant=R134aMass flow rate of refrigerant, m˙=50 lb/minSuction pressure, Ps=40 PSIADischarge…

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Q: f 7.59 kg/s. If conde

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Q: A heat exchanger is used to cool oil (with cp = 2.2 kJ/kg.°C) from 170 to 50°C by water (with cp =…

A: Given Data- For hot fluid Cp=2.2KJ/Kg'C mh=1.5kg/s Th1=170'C Th2=50'C For cold fluid Cp=4.18 KJ/Kg'C…

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Q: n-walled, double-tube, counterflow heat exchanger is used to cool oil (Cp = 2.20 kJ/kg °C) from 150…

A: Given data as per question For Hot fluid , oil Cph=2.2 kJ/kg°C, Thi=150°C, Tho=40°C, m˙=2 kg/s For…

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Q: In a lithium bromide-water absorption refrigeration system, the condenser and evaporator…

A: Step 1:Step 2:

Q: 00000.r FIGURE P8-61 8-62 Refrigerant-134a is condensed in a refrigeration sys- tem by rejecting…

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Q: Steam enters the condenser of a steam power plant at a flow rate of 18000 kg/h, a degree of dryness…

A: Mass flow rate of steam, m˙s=18000kg/h=180003600kg/s=5kg/s Degree if dryness of steam at inlet,…

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Q: nt at 1750 rpm. Determine the heat rejection rate in kW at 0 °C evaporating temperature and 55 °C…

A: Given:N=1750 rpmTe=0°CTc=55°C

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A: Introduction One of the most precious home appliances is the refrigerator. By forcing a liquid…

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Q: In a shell-and-tube heat exchanger, water enters at 85°C at the rate of 5.4 kg/s. Engine oil enters…

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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.