Help: Heat exchange issue with spray cooling water
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Seeking help: Heat exchange issues with spray cooling water. Source of the spray water: Cooling of metal surfaces (heat treatment, surface temperature around 1400°C); water at 25°C is used for spray cooling. Spray water flow rate: 5t/h. Actual site: The water vapor is directly removed using an exhaust fan and discharged into the atmosphere (at atmospheric pressure). The fan flow rate is approximately 15,000 m3/h. Design objective: To utilize the heat from the spray water (water mist) through a heat exchanger, either by absorbing that heat or by recovering the condensed water. Help: What type of heat exchanger should be used, and what is the approximate required heat exchange area? (Heat exchange with water at 25°C) Please help, experts – even just a brief suggestion would be appreciated. Thank you!
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In this operating condition, air inevitably gets mixed in, so to recover as much moisture as possible, the temperature should be lowered further. It is recommended to use gas-gas membrane plate heat exchangers; PVC material can be used when the temperature is not high, while aluminum foil or stainless steel should be used for higher temperatures.