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The principle of solar energy and wall-mounted combination system

In recent years, the gas wall is hung in replace the traditional coal-fired boiler has entered thousands of households. It has little pollution, less cost, and high energy utilization, and is favored by users. However, natural gas is a non-renewable resource, and human beings have been constantly exploring efficient cleaning, renewable or sustainable use of resources, and solar energy is one of them. Contradiction is that the solar energy is affected by the weather, and the efficiency is very unstable. Therefore, there is no advantageous use of wall-mounting furnaces or solar energy, while combined with two heating systems can make the shorter shortage.

1. Cold hot water circulation heat Solar energy and wall-mounted furnace system plus 1 solar water pump, by Single chip microcomputer control, through temperature sensor inductive temperature difference, control system operating state, and heat the cold and cold water. 2. Residents’ water The solar water tank is a hot storage tank. The external valve provides life water, and the system is turned off when the valve is turned off to ensure the supply of hot water in residents.

3. Solar heating

Solar energy heats the water under the underwater tank, and then circulates the cold and cold water through the difference in the density between the hot and cold water, and the water storage tank is connected to the heat pipe to achieve heating. The purpose of heating.

4. Soil heating heat transfer The temperature sensor measures the temperature of the heating back water, resulting in a temperature difference with the heat exchange water tank, if the temperature difference of the system is reached, the water circulation is performed, and the solar energy is warm water Heating, reaching the heating purposes; if the preset temperature difference is not reached, it still uses natural gas heating to ensure heating demand for residents.

Second, the system works

The Pole Ground Mounting Systems is controlled by the microcontroller, including the read temperature value, calculating the temperature difference, the working state, and the display, the following is the workflow of the program.

Read the solar water outlet, heat the water tank water, the warm back temperature, set to T1, T2, T3. The temperature difference of T1 and T2 is ΔT1, T2 and T3 temperature differences are ΔT2, 2 water tank heat exchange water pump is No. 1 pump, and the heat exchange tank and wall-mounted furnace are No. 2 pump, and the cold water is controlled from the heat exchange water tank and the floor heating. The solar water tank and the solenoid valve of the wall furnace are No. 1 valve and No. 2 valves, which are turned on or off at the same time, and the 3-valve is the solenoid valve between the heat exchange tank and the floor heating. After the system is turned on, the temperature sensor and the LED screen are initialized. After the first pump is opened for 2 min, the pump is opened 1 min, allowing the water circulation in the line, read the temperature and the valve state and display it in the LED screen, and completes initialization.

Entering the main program, determines the mode of operation according to ΔT1 and ΔT2, when ΔT1 \u003c2 ° C, set this state flag bit is 0, closing the No. 1 pump, read temperature difference is ΔT2 If △ T2 \u003c1 ° C, the No. 2 pump is closed, the 1, 2 valve is disconnected, No. 3The valve is closed, and the temperature value is read after 20 minutes, and the cooling water tank is insufficient in this working condition is not sufficient to cut the solar and geothermal circulation of the floor heating, and the wall is heated separately. If △ t2\u003e 1 ° C, No. 2 pump is opened, the 1, 2 valve is closed, the 3-valve is disconnected, and the temperature value is read until the cycle is jumped out to the Δt2 \u003c1 ° C, and the heat shift tank is heating and heat-exchanged heat.

When ΔT1\u003e 8 ° C, this state flag bit is set to 1, open the No. 1 pump, and then determine the mode of operation according to the ΔT2, which is consistent with the above first case, when 2 ° C \u003c△ T1 \u003c8 ° C, first determine the logo, the working mode is the same as the logo.

The system determines the operating state according to the ΔT1, select the main program, and controls the No. 1 pump state according to the flag bit, and selects the mode of operation according to ΔT2 to achieve energy saving purposes. Third, the system composition For resident housing structure, the system is mainly composed of core control systems, circular heat exchange systems, heating systems, etc., for laying pipes or housing Users with large area can increase the heat transfer tank having a diameter of 0.5m, high 1.5m in the system, and act to two heating systems heat exchange. Fourth, system components Control system remove microcontrollers, mainly involving three devices, temperature sensors selected waterproof sensors, digital input, small volume, large range, high precision, and electromagnetic The valve is controlled by the single chip microcomputer, and the water pump operating voltage is 24V, and the working voltage of the solenoid valve is DC 12V, all of which are digital output.