| China is abundant in wind energy resources.However,the wind turbine and cogeneration unit mismatch lead to the phenomenon of serious winds curtailment.In order to solve the problems of winter heating in the north of China and summer cooling in the south,a direct-drive steam compression heat pump system of wind turbine is proposed.The direct heating system of wind energy heat pump is a new type of energy system that directly converts the mechanical energy of wind turbine into heat energy.Because the energy conversion loss between mechanical energy and electric energy reduces,the system cost reduces and the efficiency is improves.First of all,through the comparative analysis of the performance of the heat pump,the design of the direct-drive steam compression heat pump system of the wind turbine is finally completed.According to the study of the matching characteristics of the wind turbine and the high temperature heat pump,it is concluded that the ratio of the transmission ratio of the wind turbine to the open type compressor is 1:5.37.Secondly,taking Zhangbei area as an example,two 1.5 MW wind turbine-driven cascade heat pump systems are used to heat the building with a building area of 49693.20 m2.Finally,the average daily COP of the heating season can reach 2.88,and the energy stored in the heat storage tank at the high wind speech just can make up for the lack of heating at the low wind speed,and the remaining heating capacity can reach 1599 k W.Through the construction of wind turbine direct-drive steam compression heat pump system experimental platform,the wind energy heat pump system operating characteristics are further revealed and verified.The main innovation of this dissertation is the research on the operation and matching characteristics of direct drive cascade heat pump system in wind turbine.The research results can provide new theories and methods for expanding the application field of wind energy heat pump system. |
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