Monthly Archives: March 2020

Which Heat Exchanger Is Best? The Three Main Types Explained.

Which Heat Exchanger Is Best? The Three Main Types Explained. Heat exchangers all work by passing a hot fluid and a cold fluid across opposite sides of a piece of metal. The heat from one fluid passes across the metal (which is thermally conductive) into the other fluid without the fluids making contact. High fluid […]

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How to start with designing a heat exchanger?

Steps for design of heat exchanger Calculate the effectiveness. Calculate the capacity rate ratio. Calculate the overall heat transfer coefficient. Determine NTU. Calculate the heat transfer surface area. Calculate the length of the tube or heat exchanger. For sizing a heat exchanger, several thermal phenomena should be considered first: Forced convection of both fluids:  Convection is the transfer of heat between […]

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Effectiveness of Shell and Tube Heat Exchangers

The effectiveness (ϵ) of a heat exchanger is defined as the ratio of the actual heat transfer to the maximum possible heat transfer Effectiveness, ε: Effectiveness of a heat exchanger is defined as ratio of actual heat transferred to maximum possible heat that can be transferred. In physical terms, the heat exchanger effectiveness can be defined as the ratio of actual heat […]

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