Research On Cost And Emission Of CCHP-wind Hydrogen Coupling System

China is facing the dual task of carbon peak and carbon neutral,and renewable energy represented by wind energy will play an important role in this task.However,renewable energy such as wind energy is intermittent and volatile,so how to absorb and solve these uncertain energy becomes particularly important.In this study,CCHP-wind-hydrogen coupling system was simulated and analyzed.The results show that this system has the advantages of controllable cost and less emission,and is a feasible technical route,which is expected to solve the problem of power fluctuation.The specific research contents are as follows:Firstly,this study combines the CCHP（Combined Cooling Heating and Power）system,the wind Power generation system and the hydrogen production system to construct the CCHP-wind hydrogen coupling system.Taking the residential buildings in Dalian City as a case,the equipment selection of the system is optimized and solved.The results show that the system has a certain feasibility.Secondly,this paper integrates hydrogen production,compression,storage and transportation stages,and puts forward the concept of full-link hydrogen cost.Dalian City is taken as the research object for accounting.The results show that the full-link hydrogen cost of CCHP-wind hydrogen coupling system（46.56 yuan/kg H₂）is basically the same as that of natural gas steam reforming hydrogen production（44.13 yuan/kg H₂）,higher than that of coal gasification hydrogen production（29.9 yuan/kg H₂）,and lower than that of hydrolytic hydrogen production（64.68 yuan/kg H₂）.It shows that the hydrogen production cost of this method is relatively economical and controllable.Thirdly,the carbon dioxide emission of the whole link is calculated and analyzed.The results show that the full-link CO₂ emission of CCHP-wind hydrogen coupling system（11.58kg CO₂/H₂）is much lower than that of coal gasification hydrogen production（29.12 kg CO₂/H₂）,natural gas steam reforming hydrogen production（15.00 kg CO₂/H₂）and electrolytic water hydrogen production（44.85 kg CO₂/H₂）.It is proved that the system has a good carbon dioxide emission reduction effect.