CR2032 button cell.Analyze and compare new energy heating, cooling and bathing hot water technologies

　　Analyze and compare new energy heating, cooling and bathing hot water technologies

　　Traditional energy consumption for heating in northern winter mainly relies on mineral combustion. Mineral energy is a non-renewable one-time energy source, and a large amount of pollutants are produced during the combustion process, seriously polluting the living environment.

　　In recent years, the government and relevant departments have made great efforts to improve the atmospheric environment and gradually eliminate the use of coal and other mineral energy. Encourage renewable new energy utilization technologies and equipment, and the government's financial department will provide one-time financial subsidies to new energy utilization units.

　　1Energy distinction

　　Non-renewable one-time mineral energy includes: coal, oil, natural gas, etc.; renewable and environmentally friendly new energy includes: solar energy, wind energy, geothermal energy, tidal energy, etc. Among them, geothermal energy and solar energy are green and environmentally friendly new renewable energy sources with large resource reserves and wide distribution. Heat pump is an energy-saving and environmentally friendly technology that can achieve clean and efficient utilization of geothermal energy, waste heat and other resources. The use of geothermal energy and the development of heat pump systems are of great significance to optimizing the energy structure, mitigating resource pressure, and improving the atmospheric environment.

　　2 New energy technologies and analysis and comparison

　　2.1 Solar energy

　　Main functions: hot water for bathing, heating

　　The utilization of solar hot water and heating is relatively convenient and the technology is relatively mature. Solar hot water bathing technology has a history of more than 30 years and has been widely recognized and applied by people. The operating principle of the solar hot water bathing system is shown in Figure 1.

　　Disadvantages: It is greatly affected by climate and light density, and cannot complete the work independently part of the time. Other energy sources must be used to assist in heating and heating purposes.

　　Conclusion: Solar heating bathing hot water projects are relatively common and mature, and building heating technology needs to be strengthened.

　　2.2 Air source heat pump

　　Main functions: heating, cooling and hot water for bathing

　　Air source heat pump technology has a history of more than 20 years. In the early days, it was generally used to heat hot water for bathing. In the past 10 years, it has been gradually expanded to building heating and cooling projects. The heat source of air source heat pumps comes from the air. As long as a small amount of electrical energy is input, a large amount of heat energy can be mined in the air during the heat pump cycle, which can be utilized by increasing the pressure and temperature. Compared with solar energy, it is almost not affected by the weather. Low-temperature air source heat pumps can operate normally and efficiently at ambient temperatures above -25°C, and the energy efficiency ratio (COP) is generally between 2.0 and 4.0. The operating principle of the air source heat pump system is shown in Figure 2.

　　Disadvantages: The operating efficiency will decrease as the ambient temperature decreases. In addition, when the ambient temperature is lower than 5°C, due to the high moisture content of the air, frost will form on the surface of the evaporator. The unit will automatically start the defrost process, and the energy consumed by defrost is approximately Accounting for 10%, it is not suitable to promote air source heat pumps in severely cold areas (ambient temperature below -25°C).

　　Conclusion: Air source heat pump technology is relatively mature and suitable for heating and cooling of small and medium-sized buildings. Combined with indoor floor low-temperature radiant heating in winter and fan coil cooling in summer, the heating task can be completed in the north.

　　2.3 Ground source heat pump

　　Main functions: heating, cooling and hot water for bathing

　　Ground source heat pump technology has experienced explosive growth since 2007 and is now generally understood and recognized by everyone. The heat source of the ground source heat pump comes from the ground. The temperature utilization depth is generally 60m~120m. The ground below 30m is not affected by the climate. It has constant temperature in all seasons. The ground source heat pump operates stably. Compared with the air source heat pump, there is no defrosting energy consumption and the efficiency is increased by about 20%. .

　　The pipes and equipment of the ground source heat pump system are installed hiddenly. There is no cooling tower on the roof and no plug-in units on the walls, thus maintaining the integrity and beauty of the building. The operating principle of the ground source heat pump system is shown in Figure 3.

　　Disadvantages: The heat source of ground source heat pumps comes from underground, and a well must be drilled underground. A heat exchange system must be laid in the well. The drilling construction volume is large. The drilling location usually occupies the green belt or parking lot of the unit. After the heat exchange system is laid, the ground returns to level. Guaranteed original design functionality. Drilling and laying underground heat exchange systems increases investment. Generally, drilling costs and material costs for soil geology account for about 30% of the total investment. For rock geology, this cost has increased.

　　Conclusion: The heat source temperature of the ground source heat pump improves its operating efficiency, and there is no frequent defrosting action. Its biggest advantage is its more stable operation. It is the preferred technology for heating and cooling of large and medium-sized buildings.

　　2.4 Air source heat pump direct supply waterless heating

　　Main functions: heating and cooling

　　This technology is less than 10 years old. Compared with other heating systems, the direct-supply waterless heating system eliminates the need for a water circulation system and completely solves the problem of antifreeze. There is no heat transfer between heat pump and water circuit circulation, eliminating water pump power consumption and reducing secondary heat exchange and pipeline heat loss. The system can be miniaturized, so that each room is equipped with an independent system, and the control and operation are extremely flexible. Combining its advantages, system efficiency increases by approximately 20%. Air source heat pump direct supply waterless heating is shown in Figure 4.

　　Conclusion: Other heating equipment must have water pump power consumption, and water pump power consumption accounts for about 15% of the total operating costs. Direct-supply waterless heating technology, unique water-pump system and reduced heat exchange loss design have effectively improved operating efficiency, obviously. Reduced power consumption. Suitable for homes and other residential-based independent buildings and building groups.

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