Economic Analysis And Operation Of Peaking On Cooling Combined Heating And Power Systems

CCHP(Combined cooling heating and power)systems is a new type of energy supply set of power generation and energy supply,can not only improve China’s energy structure,energy conservation,and can protect the safe use of electricity,so it has broad prospects for development.Early building CCHP system is the main form,as the technology matures,regional systems are developed.However,rising energy prices make the economic conditions of CCHP systems uncertain,a detailed economic analysis of the systems are needed.It describes the theoretical and technical knowledge of building type and region type system.First,through the establishment of economic analysis model and based on nearly a decade of energy price data,the economic analysis of the building type systems are evaluated and the way the use of high-grade energy is proposed to change.Based on the economic analysis,an exposition of the positioning of the building type systems is made and region type system is the future direction of development.Secondly,a region type system case about 100 MW capacity level is designed based on electrically-based principles and combined with electric refrigeration technology,heat pump technology,storage technology.A study of the feasibility and economic analysis is done for the case,which runs 16 hours in the city grid high load time(peaking time).According to the case,the size is as follows: 106 MW total installed capacity,104 MW design cooling load,95 MW design electric load,68 MW design heating load,123.45 million k W·h annual cooling load,31.06 million k W·h heating load,542 million k W·h power generation,476000 Ton hot water.Finally,a comprehensive benefit analysis,which includes analysis of peaking and environmental benefits,is done for the case and compared to conventional economic analysis.The emissions and peakiheng effect of the region case is remarkable,which can produce environmental benefits 61,083,400 yuan and 56,716,000 yuan peaking benefit each year.Based on comprehensive benefit analysis,the recovery period of the case is 5.286 years,which is shorter than nine-year payback period with conventional analysis.It has a certain significance that region type systems in the urban also serves peaking power.