深圳市高層住宅空氣源熱泵輔助太陽能集中熱水系統(tǒng)運行能耗和成本分析
[Abstract]:The application and development of solar water heating system in China has been developed for nearly forty years, and all kinds of application technology are relatively mature. However, the centralized (centralized heat, centralized heat supply, centralized management) solar hot water system in the promotion and use of the high-rise residential buildings in Shenzhen City, the energy conservation of its system has been questioned, therefore the analysis of centralized solar energy The energy consumption of the hot water system plays a vital role in the promotion and operation of the residential building. The air source heat pump assisted solar centralized hot water system is a combination of heat pump technology and renewable energy technology. The system makes full use of renewable energy and low grade air thermal energy. It has great energy saving potential and advantages in theory. This paper mainly analyzes the energy consumption and cost of the air source heat pump assisted solar centralized hot water system in Shenzhen high-rise residential buildings with 24 hours water demand, and gives reasonable optimization suggestions for its popularization and application. First, the air source heat pump assisted solar centralized hot water system is used in this paper. The operation principle, operation mode and system control method of the system are summarized and summarized. Then, the solar radiation of the solar collector system, the heat collecting efficiency and the heat collection of the plate collector, the refrigerant thermodynamic cycle of the air source heat pump auxiliary heating system, the compressor, the condenser, the evaporator and the throttle valve, are concentrated in the heat storage and heating system. The mathematical calculation method is established for the heat loss of the pipe network, the heat loss of the water tank, the pump and the power of the fan. According to the system mathematical calculation method established, the main influencing factors of the system heat collection and heat collecting efficiency are analyzed and determined, such as the radiation amount, the ambient temperature, the average temperature of the heat collecting system, the heat of the water tank and the pipe network. The main influencing factors of the loss - the environmental temperature, the insulation property of the insulation material, the thickness of the thermal insulation material, the heat of the air source heat pump, the main influence factors of the heating efficiency and the running time - the heat load of the system, the heat collection of the system, finally determine the theoretical calculation formula and the influence factors of the energy consumption of the system. On the basis of this, this paper selects two districts in Shenzhen which installed the air source heat pump to assist the solar hot water heating system, and analyses the energy consumption and cost of the system. First of all, the monthly data collection of the water consumption and power consumption of the two solar hot water hot water systems is obtained, and the monthly data collection is obtained for more than one year. The mathematical fitting formula of the water consumption per capita in Shenzhen and the energy consumption per unit of the unit in one year, and redefining the summer, winter and transition seasons in Shenzhen. By comparing the theoretical and actual energy consumption of the system, the reasons for the difference are analyzed and the operating costs of the two items are calculated. Secondly, the project 1 is carried out in July. The temperature of the environment, the atmospheric irradiance, the temperature of the import and export of the collector system and the flow rate of the collector circulation are recorded. On this basis, the fitting formula of the variation of solar radiation in summer is analyzed, the relationship between the system heat and the inlet and outlet temperature of the collection heat system and the instantaneous heat efficiency of the system are also analyzed. The relationship between the heat efficiency of the system and the thermal efficiency of the heat water tank in 2 is tested. The delay relationship between the temperature of the water tank and the heat collection is verified. The heat loss coefficient of the 2 water tank is calculated. The annual solar energy guarantee rate for the two projects, the annual energy replacement and the environment are also calculated. The results show that the application of the complete Chinese solar water heating system to ensure the 24 hour water supply system in the high-rise residential buildings in Shenzhen is unreasonable. The energy consumption and cost of the air source heat pump assisted solar centralized hot water system are obvious compared with other conventional energy sources and their energy consumption and cost vary with the season. It is obvious, but considering the cost of labor, management fees and equipment maintenance cost brought by unified management, the system will save energy but not money.
【學(xué)位授予單位】:重慶大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:TU822;TU18
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