Installation of cooling and melting ice and snow for road surface and bridge road by using underground natural energy resource

[0007] Specific implementation manner 1: This implementation manner is described with reference to FIG. 1. This embodiment consists of compressor 1, condenser 2, expansion valve 3, evaporator 4, circulating pump 5, deep heat exchanger 6, shallow heat exchanger 7, first control valve 8-1, and second control valve 8. -2. The third control valve 8-3, the fourth control valve 8-4, the fifth control valve 8-5, the sixth control valve 8-6 and the seventh control valve 8-7 are composed. The input end of the first circulating pump 5-1 is connected to the first output end of the condenser 2 tube pass, the output end of the first circulating pump 5-1 is connected to the input end of the first control valve 8-1, and the first control The output end of the valve 8-1 is respectively connected to the input end of the shallow heat exchanger 7 and one end of the third control valve 8-3, and the output end of the shallow heat exchanger 7 is connected to the second control valve 8-2 and the fourth control valve 8-2. One end of the control valve 8-4 is connected, the other end of the second control valve 8-2 is connected to the first input end of the condenser 2 tube pass, and the other end of the fourth control valve 8-4 is connected to the sixth control valve 8-6 One end of the evaporator is connected to the output end of the deep heat exchanger 6, the other end of the sixth control valve 8-6 is connected to the first input end of the evaporator 4 tube pass, and the first output end of the evaporator 4 tube pass is connected to the fifth control One end of the valve 8-5 is connected, and the other end of the fifth control valve 8-5 is respectively connected to the other end of the third control valve 8-3 and the input end of the second circulating pump 5-2, and the second circulating pump 5-2 The output end of the seventh control valve 8-7 is connected to one end, and the other end of the seventh control valve 8-7 is connected to the input end of the deep heat exchanger 6. Ethylene glycol solution is used in the pipeline.

[0008] Both the deep heat exchanger 6 and the shallow heat exchanger 7 use high-density polyethylene pipes or steel pipes

[0009] Specific implementation manner 2: This implementation manner is described with reference to FIG. 1. The input end of the compressor 1 of this embodiment is connected to the second output end of the shell side of the evaporator 4, the output end of the compressor 1 is connected to the second input end of the shell side of the condenser 2, and one end of the expansion valve 3 is connected to the evaporator. The second input end of the shell side 4 is connected, and the other end of the expansion valve 3 is connected to the second output end of the shell side of the condenser 2.

[0010] Both the deep layer heat exchanger 6 and the shallow layer heat exchanger 7 use high-density polyethylene pipes or steel pipes, the road (bridge) shallow layer heat exchanger 7 pipe spacing is controlled between 150mm and 300mm, and the shallow layer heat exchanger 7 The embedment depth is 50mm~80mm from the ground (bridge) surface, which should be determined according to the load on the road (bridge) surface, the temperature of the pipe and the heating fluid in the buried pipe. The underground energy pipe is calculated from the load on the bridge (road) surface and the heat exchange per unit drilling depth is 50-100W/m. The drilling depth is controlled at 40-100m, not too deep, otherwise the cost is high.

[0011] The applicant conducted a simulation calculation on a road (bridge) surface with a length of 50m and a width of 6m in an area of ​​Beijing. Among them, the shallow heat exchanger 7 embedded in the road (bridge) plane is a high-density polyethylene pipe, and the inner diameter of the pipe is d 1 =21.25mm, outer diameter d 2 = 26.75mm, the length is 5.5m, the distance between the tubes is 200mm, and the buried depth of the shallow heat exchanger 7 is 80mm. The deep-layer heat exchanger 6 is buried longitudinally with a buried depth of 80m. The deep-layer heat exchanger 6 uses a high-density polyethylene tube with an outer diameter of 33.5mm and an inner diameter of 27mm. Choose a heat pump unit with a heating capacity of about 140KW, and the effect of removing ice and snow on the bridge deck heating is good.

[0012] The working principle of this device:

[0013] The operating mode of this device during winter snow melting:

[0014] Close the third control valve 8-3, the fourth control valve 8-4, the first control valve 8-1, the second control valve 8-2, the fifth control valve 8-5, and the sixth control valve 8-6. The seventh control valve 8-7 is opened, and the deep heat exchanger 6 sends the heat energy obtained by the underground temperature of 10℃ (Shenyang area) to the heat pump circulation system through the sixth control valve 8-6, and then the first circulation pump 5- 1 Through the first control valve 8-1, the heated glycol solution is input to the shallow heat exchanger 7 buried under the road (bridge) surface, and the shallow heat exchanger 7 dissipates heat to the road surface (the ground temperature is above 0℃) ), to melt the snow and ice on roads and bridges.

[0015] The operation mode of the cooling device in summer:

[0016] Close the first control valve 8-1, the second control valve 8-2, the fifth control valve 8-5, and the sixth control valve 8-6, the third control valve 8-3, the fourth control valve 8-4, and the The seventh control valve 8-7 is opened, and the low temperature solution obtained from the deep heat exchanger 6 enters the shallow heat exchanger 7 through the fourth control valve 8-4. The shallow heat exchanger 7 absorbs the high temperature of about 40℃ on the ground. From the other end of the shallow heat exchanger 7, the absorbing glycol solution returns to the deep heat exchanger 6 via the second circulating pump 5-2 through the other end of the third control valve 8-3 to circulate, reaching the summer road, The purpose of cooling the bridge deck or ground.