The oil (cp= 1759 J/kg.℃) from an oil cooled electric transformer is cooled from 79.5℃ to 29.4℃ at the rate of 1360.5kg per hour. This is done in an oil-water heat exchanger that receives 2948kg/hr of water at 15.6℃. For the heat exchanger U=295 W/m2℃. Find the exit temperature of water. answer: 25.294 degrees C

Q: 4. An exhaust valve has a valve curtain area of 3 x 10³ m2 and valve discharge coefficient of 0.7.…

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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…

Q: Water flows through a shower head steadily at the rate of 8 kg/min. The water is heated in an…

A: Given:  mass flow rate of water = 8 kg/min = (8/60) kg/s = 0.133 kg/s initial cold water inlet, Tc1…

Q: A component in a refrigeration system is the evaporator. It is here that the cold refrigerant picks…

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Q: A liquid food flows in the inner pipe (internal diameter-8 cm) of a double-pipe heat exchanger. The…

A: We will show the temperature profile sketch for the liquid food and water, X axis- length Y axis -…

Q: ou are designing an electric air heater for large conference rooms. A 75mm OD, 4mm wall thickness…

A: Given Data: The outer diameter of the pipe is D = 75 mm. The wall thickness of the pipe is t= 4 mm.…

Q: Steam at 1.4 MPa and 300°C enters the shell side of a shell and tube heat exchanger. It leaves as…

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Q: Water at 90C is being pumped from a large storage tank at 1 atm abs at a rate of 0.189 m3/min by a…

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Q: A heat exchanger is being used to transfer heat between water and a benzene. The benzene enters the…

A: Solution: Inlet temperature of benzene Th,i=90°C Inlet temperature of water Tc,i=15°C Density (ρ1)of…

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.