A polytropic co-production carbon dioxide power cycle system and method thereof

Abstract

The present application belongs to the technical field of comprehensive energy utilization, and relates to a multi-energy co-production carbon dioxide power cycle system and method thereof, comprising a gas storage bin, a first compressor, a first cooler, a liquid storage tank, a first turbine and a post-preheater, a hot water supply unit, a waste heat recovery unit and a cold energy recovery unit. The present application supplies hot water through the hot water supply unit to absorb the heat generated by multi-stage compression of carbon dioxide to obtain steam to supply steam to users, and absorbs and stores waste heat of the system through cooperation of the waste heat recovery unit and the hot water supply unit to heat carbon dioxide after expansion and work, and recovers cold energy in the carbon dioxide after expansion and work through the cold energy recovery unit to supply cold water or make ice to users, so that waste heat and cold energy of the power cycle process can be recovered, and steam and cold energy including electric energy are output, which not only reduces system energy consumption, but also improves energy utilization efficiency of the system.