Show transcribed image text 13. Heat Recovery in a Sheetrock Plant (3 engineers) One of the components needed in the manufacture of Sheetrock is water The process requires 0.004 4 m3/s of water at a temperature of about 30°C. During summer months, the city water supply provides water whose temperature can be as high as 32.5°C. During other months, the average temperature of water supplied by the city is about 7.5°C. This water must be heated so it can be used successfully for the process. The water is heated by natural gas burners while it is in a storage tank. One of the final phases of Sheetrock production is the drying stage. Heated air is moved by a fan around the Sheetrock in an oven. The air is then exhausted. It is desired to recover energy from the warm, humid exhaust air and use the energy to heat the incoming city water from 7.5°C (worst case) to as warm as possible. The energy recovered would reduce the
13. Heat Recovery in a Sheetrock Plant (3 engineers) One of the components needed in the manufacture of Sheetrock is water The process requires 0.004 4 m3/s of water at a temperature of about 30°C. During summer months, the city water supply provides water whose temperature can be as high as 32.5°C. During other months, the average temperature of water supplied by the city is about 7.5°C. This water must be heated so it can be used successfully for the process. The water is heated by natural gas burners while it is in a storage tank. One of the final phases of Sheetrock production is the drying stage. Heated air is moved by a fan around the Sheetrock in an oven. The air is then exhausted. It is desired to recover energy from the warm, humid exhaust air and use the energy to heat the incoming city water from 7.5°C (worst case) to as warm as possible. The energy recovered would reduce the
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