The Sewage-source Heat Pump Of A Certain City District Heating Feasibility Study

The sewage-source heat pump is a renewable energy technology that draws heat or cold quantity from sewage by heat pump technology to provide heating or cooling for buildings.The sewage-source heat pump is a high energy-efficient technology, thus its utilizing in energy saving and low carbon city development is of great significance.Owing to the function of the sewage-source heat pump influenced by multiple factors,experts have been committed to the field of research over the years so as to apply that technology scientifically.The operation mode of the sewage-source heat pump is small temperature difference and mass flow. Compared with traditional way of heating, its delivery line has a great investment and transmission energy consumption. Anyway there exists a direct relationship between its transporting distance and construction cost, operating cost and the reliability of the heating and cooling. According to energy-saving principle of the sewage-source heat pump, winter water temperature is higher, the sewage-source heat pump system COP is greater, on the other hand, the higher the water temperature in summer, the less EEF sewage-source heat pump system. In sewage water temperature under certain conditions, if the sewage design choice available temperature difference is too big, will directly affect the performance of heat pump system and safe operation of the equipment simultaneously.Based on maximum transmission energy efficiency ratio of relevant standard, the article can measure to acquire the maximum heating distance. And according to the basic principle of water-water heat exchanger heat transfer, the temperature difference of sewage in the system will be available by calculation and analysis. The article uses dynamic load analysis method to determine the heating capacity building thermal indicators and assessment. The end systems connecting method and operation regulation scheme have been brought forward for some specific problems such as the heating water temperature low and the user directly supply.Finally, the energy saving and environment benefits of the system have been evaluated in this article.