Determination of the heat transfer coefficient of heat exchangers and selection of heat exchangers!
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The concentration crystallization tank is equipped with a jacket and coiled tubes. It uses steam with a thermal power of 4 kilograms; the solution inside the tank is 20% ammonium sulfate. Under a pressure of -75 KPA and a temperature of 55 degrees, dehydration takes place, with a throughput of approximately 1600 KG/H. There is a condenser at the gas outlet of the crystallization tank – steam flows through the tube side, while circulating water flows through the shell side, with the inlet water temperature at 30 degrees and the outlet water temperature at 35 degrees. It is required that all 1600 KG/H of steam be condensed. Please help me calculate the approximate heat exchange area required for a stainless steel double-pass tubular condenser, as well as for an enamel-coated plate-type condenser Could you help me estimate the heat transfer coefficient? Thank you!
It’s better to calculate the heat transfer coefficient by yourself; learn more – it will come in handy in the future!
Calculated using HTFS. Alternatively, the heat transfer coefficient estimation recommended in the heat exchanger section of the first volume of the Medical Engineering Institute’s \"Chemical Engineering Design Manual\" can be used.
Using the recommended overall heat transfer coefficient seems problematic to me; the device has another vacuum dehydration load of 500 KG/H. The heat exchange area of the condenser is 80 square meters, but with the estimated heat transfer coefficient, 20 square meters should be sufficient!
I have also tried to carry out calculations in this regard, but one thing is that the owner needs to take into account the phase change that occurs during the cooling process, as the heat transfer coefficient varies in such cases.