Research On Operational Characteristics And High- Efficiency Heat Transfer Of Water Source Heat Pump System In Riverside Metro Station In Cold Region

With the continuous development of China's urbanization and modernization,a large amount of energy and large public transport are needed by more and more cities.The heat pump is an efficient,environmentally friendly,energy-saving device that makes full use of low-grade thermal energy.The energy consumed by the entire heat pump is only a small part of the output energy.There are a large number of cities in China that are under construction or have been approved to construct subways.There are more and more subway station buildings,and the energy required for subway air conditioning systems is increasing.If the subway station building and the heat pump can be combined according to local conditions,it will be able to effectively save energy and reduce emissions,and reduce environmental pollution.This thesis studies the air-conditioning cold and heat source system of the riverside subway station in Harbin in the severe cold region,and analyzes the application of the river water source heat pump system and the feasibility of the subway station construction.Firstly,by analyzing the climatic characteristics of Harbin,the water quality,temperature,and volume of the Songhua River Harbin section,it is concluded that the river water in the Harbin section of the Songhua River is a suitable natural source of cold and heat.Feasibility.However,there may be other aspects to be considered in specific practical applications.Secondly,according to the actual situation of the subway station construction project,the Dest software is used to simulate the dynamic load of the subway station during the whole year,and three different river water source heat pump systems and river water intake schemes are designed,which are direct,indirect,and closed river water source heat pumps.system.The TRNSYS software is used to simulate the three-year system and the comparison of air source heat pump systems throughout the year.The energy consumption and performance of the system are analyzed and analyzed,and the overall efficiency of the river water source heat pump system in the subway station is analyzed.Superiority of source heat pump system.An experimental platform for scaling and descaling of the river water source heat pump heat exchanger was set up to analyze and study the effects of flow velocity,median particle size andsediment content on scaling and the effect of ultrasonic systems on descaling.Finally,the superiority of the river water source heat pump system is analyzed from the aspects of economy,energy saving and environmental protection benefits,and the closed river water source heat pump system is selected as the most suitable for subway station construction.In short,the ultrasonic system can solve the scaling problem of river water source heat pump systems,providing new development and guidance for the development of river water source heat pumps,and the design of closed river water source heat pump systems also provides new ideas for the development of surface water sources in cold regions.