Heat Recovery Systems Analysis And Design Of Air Compressor

This paper summarizes and reviews the progress of the air compressor heat recovery systems at home and abroad firstly. Then some existing problems during system reform are discussed and the reasons of breakdown during system operation are analyzed. Classifications and functions of air compressors are summarized. Oil injected screw air compressor is selected as theresearch subject, and oil injected screw air compressor system components are presented. In light of the analysis and thermodynamic calculation on the reversible adiabatic compression, reversible isothermal compression and reversible polytropic compression process, the amount of recoverable waste heat is studied during actual compression process of air compressors and the feasibility of heat recovery techniques of oil injected screw air compressor system is evaluated.On the basis of existing oil injected screw air compressors of Ingersoll Rand Company, main influencing factors of the air compressor heat recovery systems, such as discharge temperature, oil injection temperature and oil volume, are analyzed and calculated. Meanwhile, the maximum allowable pressure drop of the oil-side in the heat recovery heat exchanger is calculated to ensure the system running continuously and reliably. Through comparative analysis, a plate heat exchanger is selected for heat recovery from oil injected screw air compressor. In order to reduce the initial equipment investment, thermal mix design method is carried out for the plate heat exchanger design and calculation. To prove the superiority of thermal mix design, traditional design method is adopted by Phecal software.Based on the above analysis, the actual application of heat recovery air compressor system in Shanghai Chlor-Alkali Chemical Co., Ltd. is introduced and the economic analysis is made.