Solar energy creates a comfortable home life

Today's society is busy coping with the energy crisis (non-renewable resources such as oil, natural gas, coal, electricity, etc. are drying up), energy prices continue to rise, increasingly affecting the international economic situation and people's normal lives, especially for new energy-intensive The application of technology and new products has created huge resistance; the development and utilization of renewable energy, air and solar energy (which will never be exhausted) has become the focus of global attention, and the Chinese government is also strongly supporting and encouraging the development and use of new and renewable energy.

Solar energy is the energy released by the continuous nuclear fusion reaction process inside the sun, and it is radiated to the earth. People use photoelectric, photothermal, and photochemical methods to convert and use it to serve humanity. Its characteristic is inexhaustible, inexhaustible, once put into life-long use, without any pollution. In other words, solar energy is a green, environmentally friendly, and cheap energy source. How to effectively use solar energy in floor heating is particularly important. This article lists two types of floor heating systems that use solar energy: one is the dual heat source system of solar energy + wall-hung boiler, which realizes heating and domestic hot water functions; the other is the solar energy + air source heat pump (or heat pump), which can be supplemented with auxiliary power. The multi-heat source system of the heating equipment realizes a home comfort system integrating heating, central air conditioning (refrigeration) and domestic hot water.

The system can realize a home comfort system integrating floor heating, domestic hot water and central air conditioning (refrigeration).

It is a multi-heat source system that uses solar energy + air source heat pump (or heat pump) and can be supplemented with auxiliary electric heating equipment. The system is optimized in design, extremely cost-effective, simple in structure, and energy-saving effect can reach more than 40%. It is a typical program worthy of universal promotion.

Heating and air conditioning (shared) water tanks, floor heating pumps, floor heating pipelines, and solar collector plates. When there is a need for heating, automatically control the electric valves AV3, AV4 to open to form a solar floor heating system. The water pump (P2) is a floor heating circulating water pump, which directly pumps the floor heating water into the solar heat collecting plate for heat exchange. The air source heat pump is used as a secondary heating source. When the solar energy (sunlight) is insufficient, the heat exchange coil of the air source heat pump system will heat the water tank, which can fully meet the needs of the floor heating heat source.

The system can realize the two functions of floor heating and domestic hot water. The system adopts two heat sources of solar energy and gas-fired wall-mounted boiler, and effectively combines the two heat sources through a "flow balance tank", so that the entire system is automatically controlled to achieve simple operation, comfortable and energy-saving operation. It is already a very mature application program, and there are many similar engineering examples.

A group of coils of the pressurized solar collector plate, solar circulation pump, and double coil heat exchange water tank form a closed circulation system. The solar circulation pump is controlled by temperature to circulate in the medium, and the circulating medium is a special antifreeze. Because the volume and pressure of the antifreeze medium are affected by the temperature of the antifreeze, an expansion valve, safety valve, and expansion tank must be installed in the pipeline.

The solar circulation system heats the double-coil heat exchange water tank, and the heat exchange coil and water pump form a circulation system to send the solar heat source water to the flow balance tank. Mix the hot water with the wall-mounted boiler in the flow balance tank. The flow balance tank is a key component of the parallel operation of the two heat source systems, which plays the role of heat source mixing and hydraulic and flow balance distribution. The floor heating pump is a floor heating circulation pump, which can play the role of circulation and pressure increase. If the pump is stopped, it will also achieve comfortable temperature control of the floor heating system. During non-heating period, closing the electric valve can cut off the floor heating system.

The double coil heat exchange water tank is also a volumetric water tank for domestic hot water. Hot water passes through the three-way mixing valve, which can keep the outlet temperature of 50 constant. It forms a central hot water system with the faucet pipe and hot water circulation pump. The most ingenious design of the system is that when the heating is stopped (the AV1 electric valve is closed), the hot water of the wall-mounted boiler heats the heat exchange water tank through the coil. Therefore, H2 heat exchange coil has the function of "bidirectional heat exchange". In this way, sufficient solar hot water can be guaranteed even when solar energy (sunlight) is insufficient. The hot water circulation pump (P4) in the picture can realize the circulation of hot water pipelines, automatically constant the water temperature of the pipeline, so that the faucet water "opens immediately and is hot, no need to put cold water".





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