A Counter-flow heat exchanger (water-to-water) with these specifications. Hot water enters at 95 oC while cold water enters at 20 oC. The exit temperature of hot water is 15 oC greater than that of cold water, and the mass flow rate of hot water is 50 percent greater than that of cold water. The product of heat transfer surface area and the overall heat transfer coefficient is 1400 W/K. Taking the specific heat of both cold and hot water to be Cp = 4180 J/kg.K, Calculate: (a) The outlet temperature of the cold water, (b) LMTD (c) The effectiveness of the heat exchanger, (d) The mass flow rate of the cold water, (e) The heat transfer rate.
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
A Counter-flow heat exchanger (water-to-water) with these specifications. Hot water enters at 95 oC while cold water enters at 20 oC. The exit temperature of hot water is 15 oC greater than that of cold water, and the mass flow rate of hot water is 50 percent greater than that of cold water. The product of heat transfer surface area and the overall heat transfer coefficient is 1400 W/K. Taking the specific heat of both cold and hot water to be Cp = 4180 J/kg.K, Calculate:
(a) The outlet temperature of the cold water,
(b) LMTD
(c) The effectiveness of the heat exchanger,
(d) The mass flow rate of the cold water,
(e) The heat transfer rate.
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