The sewage source heat pump mainly uses urban sewage as the cold and heat source for extracting and storing energy, and uses the internal circulation of the refrigerant in the heat pump system to change the state of the refrigerant, and consumes a small amount of electric energy, so as to achieve an innovative cooling and heating effect. New Technology to Solve Heating and Environmental Protection Shields On June 11, the reporter went with the staff of Shenyang City Construction Committee and Shenyang Power Supply Company to the Renewable Water Heat Pump No. 1 Heat Exchange Station located in Sunshine 100 International New City. The first sentence of the exchange with He Yongchun, the manager of the heat exchange station, was “squeakingâ€. "If the heat supply line of the people's home is ©, then the sewage will not flow all over the house." "This issue will never happen in reality," He Yongchun told reporters confidently. Originally, the main working principle of sewage source heat pump is to use the sewage source heat pump compressor system, consume a small amount of electric energy, and “extract†the low λ heat energy stored in the water in winter to provide heat for users. Sewage is introduced from the municipal pipe network, heat energy is extracted through the plate heat exchanger, and then sent to the heating unit through the intermediate water circulation pump, and then supplied to users. The water and sewage supplied to users are separated by two sets of closed devices and there is no opportunity for them to meet each other. According to Liang Yunfa, chief of the office of the ground-source heat pump of Shenyang Municipal Construction Committee, Shenyang is located in northern China. Winter heating is mainly achieved through the combustion of fossil fuels such as ú, oil, and natural gas. Heating and environmental protection have become an intractable shield. Urban sewage is a rare source of heat and heat for heat pumps in the cold regions of the North. Its temperature is relatively stable throughout the year, winter is higher than the ambient air temperature, and summer is lower than the ambient air temperature. This temperature characteristic makes the sewage source heat pump operate more efficiently than conventional air conditioning systems, and has significant energy saving and operating cost savings. He said that at present, the Sunshine 100 International New City Phases I, II and III projects promote the application of sewage source heat pump technology, and the actual heating area reached 1.62 million square meters, ranking first in the country. According to statistics, this project can reduce carbon dioxide emissions by 106,900 tons, 346 tons of sulfur dioxide, and 300 tons of nitrogen oxides in the following year, achieving zero PM2.5 emissions. At the same time, the sewage source heat pump technology system does not need to set up a cooling tower, uses the city's original sewage, and saves a lot of water resources. “As the government authorities, we fully support the promotion and application of this technology.†Power supply boosts environmental projects To build a beautiful homeland with clear water and blue sky, it is necessary to rely on high-tech means. Electric power plays an irreplaceable role in boosting the sewage source heat pump project. “This project is a model project for the effective linkage and successful construction of the “Four Ones†under the joint efforts of the Shenyang City Construction Committee, Shenyang Power Supply Company, sewage source heat pump heating companies and real estate development companies. Liang Yunfa said. According to Fan Zhenyu, responsible for the marketing department of Shenyang Power Supply Company, the application of the sewage source heat pump heating technology is the company’s response to the call of the State Grid Corporation of China to fully start the electric energy replacement work in the operating area and face the terminal energy consumption market, and continuously improve the power in the terminal. The proportion of energy consumption is an important measure to promote social energy conservation and emission reduction, improve energy efficiency, and solve the urban haze problem. At the same time, it is in line with the country's latest energy strategy, changing the way, adjusting the structure, and taking a successful case of sustainable energy development. “Initially, before the implementation of this project in Shenyang, we were most worried about the problem of electricity. Electricity supply, services, electricity prices, investment costs for the entire project, operating costs, and post-maintenance issues all involved electricity, but with Shenyang When the company's technical personnel came into contact, they found that they had transformed all of our concerns into favorable conditions, and a big mountain became a smooth road.†Dong Yue, a sales manager of sewage source heat pump heating companies, told reporters. In order to ensure that the project landed as soon as possible and to achieve its effectiveness as soon as possible, Shenyang Power Supply Company established a special working group to integrate resources at the initial stage of the project and provide a rationalized power supply program for the sewage source heat pump heating companies through on-site surveys and load forecasting. At the same time, a special person was assigned to provide ground source heat pump related power price policies for waste water source heat pump heating companies, risk assessment for project investment, and economic evaluation based on the development of power market. Once the project was proposed, it was highly concerned by the municipal party committee and the municipal government. Under the joint efforts of the power supply enterprises, sewage source heat pump heating companies and developers, the project was quickly approved by the Shenyang City Construction Committee, forming the “four λ oneâ€. The joint collaboration model, the project broke ground successfully. Stepping out of the park surrounded by green trees, in front of the rippling blue river. Blue sky, white clouds, green water ... Here, energy-saving emission reduction is no longer a slogan or slogan, but the reality that is occurring. [Extended reading] Sewage is also treasure According to statistics, under the 5% annual growth rate of global energy consumption, the global charcoal is expected to be recoverable for 200 years, oil can be recovered for 30 to 40 years, natural gas can be recovered for 60 years, and fossil fuel energy is expected to be used for one to two hundred years. The world's energy shortage situation is grim. China’s energy resources per capita are poor, and the per capita possession is only one-half of the world average and one-tenth of the United States. The problem of energy shortages has become increasingly serious. Saving energy and developing new energy have become urgent issues facing all humankind. Energy and environment are the two major themes of sustainable development. At present, the heating and air-conditioning of buildings based on burning petrochemical raw materials not only has a large amount of energy, but also causes great pollution to the environment. Urban sewage is composed of industrial wastewater and domestic sewage. It has a huge amount of water and is a kind of renewable thermal energy resource rich in low λ thermal energy. The sewage source heat pump air conditioning system uses urban sewage as the building's cold and heat source to solve the winter heating of buildings. The important technology of air conditioning in summer and hot water supply throughout the year is also a thought and effective way for the development and utilization of urban sewage resources. At the same time, the city waste heat and carbon dioxide, sulfur dioxide, nitrogen oxides, dust and other pollutants are reduced. The sewage source heat pump system is the most promising one for the development and application prospects of various heat pump technologies in China. At present, the technology is relatively mature. There are many domestic and foreign engineering projects. In the early 1980s, sewage source heat pump technology has been applied in Sweden, Norway and other Nordic countries. Now China's sewage source heat pump has also been applied to a certain extent. Data statistics show that the application of the sewage source heat pump system saves more than two-thirds of the electric energy compared with the electric heating system, and saves more than one-half of the ú charcoal resources compared to the conventional fuel-based heat pump. Because the heat source temperature of the sewage source heat pump is relatively stable throughout the year, its cooling and heating coefficient is about 40% higher than that of a conventional air source heat pump, and its operating cost is only 50% to 60% of that of an ordinary central air conditioner. In terms of the comparison of clean heating methods, the economic benefits of sewage source heat pumps are very significant: equipment investment, annual operating costs, and annual operating costs are 84.1%, 85.0%, and 72.5% of the groundwater heat source systems, respectively, and are gas-fired air-cooled air-conditioning systems. 77.1%, 35.0%, 46.2%. More vacuum pump information is available at China Vacuum Pump Trading Network (/).
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