This option offers big benefits and maximum return on investment. Heat can be recovered and converted into recirculating air for comfort heating in plants or pre-heated process air. When not required, heat is rejected to the outdoors. Annual Energy Savings Up to $16,700, A 300 Hp compressor can generate 13,610 BTU/minute. This represents 8.16 therms/hour of usable heat worth $4080.00 per 1000 hours of compressor operation, Recover costs in less than two years with the resulting energy savings. The EES can be installed for an initial investment equal to or less than nearly any heat recovery system, Thermostatic monitoring and the ability th mix outdoor air with recirculating air allows for better temperature control. Temperature range can be adjusted from 50F to 90F (10C to 32C). Negative Pressure Problem Solved By bringing in a continuous flow of outside air, the EES System will provide make-up air to virtually eliminate negative pressure in the plant.
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in section "Screw compressors"