Multi energy coupling system refers to the conversion, complementarity, and coordination of solar energy (photovoltaic/solar thermal), heat pumps, boilers, and heat sources through certain technical means in the energy system, achieving multi energy supply of heating and domestic hot water. Compared to traditional heating methods, multi energy coupled heating systems can play an important role in saving energy, reducing emissions, and improving heating efficiency

1. Flexibility: Multi energy coupled systems can dynamically adjust their operating modes according to seasonal and different temperature requirements, with strong stability and reliability

2. Efficiency: Multi energy coupling systems can fully utilize waste heat, significantly improve thermal efficiency, and reduce energy waste

3. Environmental friendliness: The multi energy coupling system adopts renewable energy to reduce the waste gas generated by combustion and achieve green and low-carbon living

This system is a heating and cooling+domestic hot water system. Adopting multi energy coupling, PVT photovoltaic/photothermal+air source heat pump+thermal storage water tank, with a building area of 32000 square meters, using 12 285kw (cooling load) air source heat pumps, with an electrical load of 1140kw, and a maximum daily hot water volume of 120m³/ d， Maximum hourly water consumption of 60m³/ h。 The temperature of domestic hot water is 50 ℃. The heating time is 7 hours, and 5 air source heat pump hot water units with a rated heat capacity of 180kw are used. There are a total of 994 sets of PVT photovoltaic modules, which can meet the daily demand for hot water while generating 487kw of electricity. The annual heating operating cost is calculated to be 16-18 yuan/square meter and 7-9 yuan/ton for hot water

This system is equipped with 6 gas boilers with a heating capacity of 6MW. Currently, the heating area is 820000 square meters, and it will need to be increased in the future. The water vapor in the flue gas of gas boilers is pre cooled at the chimney outlet in a saturated state, forming white smoke, which causes certain atmospheric pollution. This project adopts a flue gas absorption heat pump unit with a heating capacity of 6.6MW, using natural gas as the driving energy to absorb the waste heat in the flue gas and transfer it to the heating pipeline network, enhancing the heating capacity, saving heating energy, and reducing the content of sulfides and nitrides in the flue gas, reducing the formation of white smoke, and even completely disappearing it. It also improves the ultra-low emission transformation of the atmosphere and reduces the formation of colored smoke plumes; Whitening” The governance effect is very significant. Save nearly a million operating costs and achieve energy savings of approximately 15-20%

This system provides hot water for workshop heating and worker bathing. Adopting multi energy coupling, solar energy+cross season heat storage+heat storage tank+electric boiler, heating area of 20000 square meters, heat load of 1600kw, maximum water consumption of 88m³/ Day, maximum hourly water consumption of 20m³/ h。 The temperature of domestic hot water is 55 ℃. The water usage time for this project is relatively concentrated. When hot water is not used at the end of summer, cross season heat storage is adopted, and temperature difference control is used. When solar energy and heat storage cannot meet the end use during winter heating, electric boilers are used for supplementary heating. The comprehensive calculation shows that the annual heating operation cost is 12-14 yuan/square meter, and the hot water cost is 10-12 yuan/ton