CN108800615A - Shallow layer geothermal energy and solar energy composite exterior wall preserving temperature and reducing temperature system - Google Patents

Abstract

The invention discloses a shallow geothermal energy and solar energy composite external wall heat preservation and cooling system, which includes an external wall, a heating or cooling coil, a common water supply and return vertical pipe, a supply and return main pipe, solar hot water and an underground pipe water system , the heating or cooling coil is organically combined with the exterior wall insulation and exterior decoration structure, and is connected to the water supply and return main pipe together with the buried pipe water system and the solar hot water system; by switching the water supply and return main pipe valve and the solar tube The road valve realizes the heating and insulation or cooling and cooling of the outer wall, and brings the heat to the underground soil layer. The beneficial effects of the present invention are: direct use of shallow geothermal energy, a low-grade energy source, and solar energy as an auxiliary energy source, heating and heat preservation of building exterior walls in winter and cooling and cooling in summer, can reduce energy consumption of building exterior walls by 10%-50% ;Use the solar hot water system to replenish heat for the soil in transitional seasons, solve the problem of unbalanced soil heat absorption and discharge, and realize sustainable development and utilization of shallow geothermal resources.

Description

Shallow geothermal energy and solar energy composite external wall insulation and cooling system

technical field

The invention relates to the field of building energy conservation, in particular to a shallow geothermal energy and solar energy composite external wall heat preservation and cooling system.

Background technique

In my country, at this stage, building energy consumption accounts for about 1/3 of the total energy consumption in the country. Enhancing the thermal insulation and thermal insulation performance of building envelopes is one of the important measures to reduce building energy consumption and realize building energy conservation. At present, common methods of external wall thermal insulation include rubber powder polystyrene particle external wall thermal insulation system, EPS board thin plaster external wall thermal insulation system, and rigid foam polyurethane external wall thermal insulation system. The thermal insulation of the thermal insulation board reduces the dissipation of indoor energy, which are all passive thermal insulation measures.

Using renewable energy such as geothermal energy and solar energy to reduce the consumption of non-renewable energy such as coal and natural gas is also one of the important measures to achieve building energy conservation. In recent years, more and more attention has been paid to the development and utilization of shallow geothermal energy. Shallow geothermal energy is mostly low-grade thermal energy, especially the constant temperature layer of the soil is maintained at the level of the local average annual temperature all year round, but due to the low temperature, it cannot be directly used for heating and domestic water, and usually requires the use of heat pump technology. If the low-grade shallow geothermal energy can be directly used for building energy saving and consumption reduction, it will have great practical significance.

Contents of the invention

The purpose of this invention is to provide a shallow geothermal energy and solar energy composite exterior wall insulation and cooling system, which directly uses shallow geothermal energy, a low-grade energy source, to implement heating and insulation in winter and cooling and cooling in summer on the exterior walls of buildings, thereby reducing the temperature of buildings. The energy consumption of the external wall can realize the energy saving of the building. At the same time, solar energy is used as auxiliary energy, auxiliary heating in winter and replenishing heat for soil in transitional seasons, solving the problem of unbalanced soil heat absorption and discharge in winter and summer, and realizing sustainable development and utilization of shallow geothermal resources.

In order to achieve the above purpose, the technical solution adopted by the present invention is to provide a shallow geothermal energy and solar energy composite external wall thermal insulation and cooling system, which: includes external walls, heating or cooling coils, common water supply and return risers, and exhaust valves , the water supply and return main pipe, the solar water heating system formed by the solar collector, the circulating water pump of the solar water heating system and the pipeline of the solar water heating system, and the buried pipe water formed by the buried pipe and the pipeline of the buried water system systems, valves. The heating or cooling coil is a serpentine coil, and heat conduction plates can be added to improve heat transfer. It is installed inside the outer wall, and is organically combined with the outer wall insulation and outer decorative structural layer. The specific setting should take into account the local climate conditions and the grade of geothermal resources. , multiple sets of parallel connections are connected with the common water supply and return riser, the pipe material can be PPR, PE, aluminum-plastic composite pipe, etc., which can be laid during the construction process, or can be made into prefabricated building components to achieve prefabricated installation; the shared water supply The return water riser is located indoors or in the pipe well for convenient maintenance and antifreeze, with an exhaust valve on the top, and is connected with the main water supply and return pipe located in the trench or in the basement; the main water supply and return pipe is connected with the buried pipe water system It is connected with the solar water heating system to form a closed pipeline, and the solar water heating system circulating water pump and the buried pipe water system are respectively provided on the solar water heating system pipeline and the water supply and return main pipe. The circulating water pump provides circulating power, and valves connecting or disconnecting the heating or cooling coils in the outer wall are provided on the solar hot water system pipeline and the main supply and return water pipe. In winter, the buried pipe water system and the solar water heating system are combined to deliver hot water for the heating coil to achieve heating and heat preservation for the outer wall of the building; The water is sent to the cooling coil through the circulating water pump of the buried pipe water system to cool the exterior wall of the building, and at the same time bring the heat to the underground soil layer for heat supplementation; in the transition season, by switching the valve, the solar hot water system is prepared The hot water is circulated by the circulating water pump of the buried pipe water system to bring the heat to the underground soil layer to achieve heat supplementation.

The effect of the present invention is to directly use shallow geothermal energy, a low-grade energy source, and use solar energy as an auxiliary energy source to implement heating and heat preservation in winter and cooling and cooling in summer for the outer wall of the building, which can reduce the energy consumption of the outer wall of the building by 10%-50% , At the same time, using the solar water heating system to replenish heat for the soil in the transition season can better solve the problem of soil heat absorption and discharge imbalance, and is conducive to the sustainable development and utilization of shallow geothermal resources. Direct use of shallow geothermal energy without using heat pump technology can reduce power consumption; using solar energy as an auxiliary energy source can not only increase the effect of heating and heat preservation in winter or reduce the number of buried pipes, but also replenish heat to the soil in transitional seasons to solve the problem of soil pollution. Unbalanced heat absorption and exhaust; Moreover, because the temperature of the outer surface of the building's outer wall increases or decreases, it can reduce the impact of large changes in outdoor air temperature on the indoor temperature and improve indoor comfort; the outer wall insulation heating or cooling coil and The organic combination of building exterior walls can not only reduce the energy consumption of building exterior walls, but also improve indoor comfort, and can be widely used in exterior wall insulation systems of various buildings.

Description of drawings

Fig. 1 is a schematic diagram of a shallow geothermal energy and solar energy composite exterior wall heat preservation and cooling system according to the present invention.

In the picture:

1. External wall 2. Heating or cooling coil 3. Common water supply and return riser

4. Exhaust valve 5. Water supply and return main pipe 6. Solar collector

7. Circulating water pump of solar water heating system 8. Pipeline of solar water heating system

9. U-shaped buried pipe 10. Circulating water pump of buried pipe water system

11. Buried pipe water system pipeline 12-13. The first group of valves

14-15, the second group of valves 16-17, the third group of valves

Detailed ways

A shallow geothermal energy and solar energy composite external wall heat preservation and cooling system of the present invention is described in conjunction with the accompanying drawings.

A shallow geothermal energy and solar energy composite external wall thermal insulation and cooling system shown in Figure 1 includes an external wall 1, a heating or cooling coil 2, a common water supply and return riser 3, an exhaust valve 4, and a supply and return main pipe 5 , the solar water heating system formed by the solar heat collector 6 and the solar water heating system pipeline 8, the buried pipe water system formed by the U-shaped buried pipe 9 and the buried pipe water system pipeline 11, the first group of valves 12 -13, the second group of valves 14-15, the third group of valves 16-17. The heating or cooling coil 2 is a serpentine coil, and a heat conduction plate can be added. The heat conduction plate is made of ultra-thin steel plate or aluminum plate to improve heat transfer. It is arranged in the outer wall 1 and organically combined with the outer wall insulation and outer decoration structure layer The specific setting should take into account the local climate conditions and the grade of geothermal resources. Multiple groups of parallel connections are connected to the common water supply and return riser 3. PPR, PE, aluminum-plastic composite pipes and other pipes that are easy to bend can be selected. It can also be made into prefabricated building components to realize prefabricated installation. The common water supply and return riser 3 is located indoors or in the pipeline well for the convenience of maintenance and antifreeze. The water supply and return main pipe 5 in the interior or in the basement is connected, and the water supply and return main pipe 5 is connected with the buried pipe water system and the solar water heating system to form a closed pipeline, and between the solar water heating system pipeline 8 and the The water supply and return main pipe 5 is respectively provided with a solar hot water system circulating water pump 7 and an underground pipe water system circulating water pump 10 to provide circulating power. There are valves that connect or disconnect the heating or cooling coils in the exterior wall. The circulating medium in this system can be non-toxic and non-corrosive liquids such as water and ethylene glycol antifreeze.

The working principle of a shallow geothermal energy and solar composite external wall heat preservation and cooling system in the present invention is: in winter, directly use shallow geothermal energy, a low-grade energy source, to actively heat and maintain the external wall of the building to strengthen the building. The heat preservation effect of the enclosure structure, the temperature of the water in the U-shaped buried pipe 9 absorbs geothermal energy rises and directly flows into the heating coil 2, and is circulated by the circulating water pump 10 of the buried pipe water system, and the temperature in the heating coil 2 is high. The water can increase the temperature outside the structure of the outer wall 1, reduce the temperature difference between the inside and outside of the structure of the outer wall 1, and reduce the dissipation of indoor heat to the outside through the wall. In order to improve the effect of heating and heat preservation or properly reduce the layout of buried pipes, use solar energy as an auxiliary heat source, close the second set of valves 14, 15, open the first set of valves 12, 13, the third set of valves 16, 17, and solar collectors 6 After receiving solar radiation, the water with increased temperature is circulated by the solar water heating system circulating water pump 7, and is connected in parallel with the buried pipe water system to deliver hot water to the heating coil 2, heating and insulating the outer wall of the building. In summer, when the sun shines, the temperature outside the outer wall 1 structure rises, and the heat transferred to the room increases the energy consumption of the building. The third group of valves 16, 17 is opened, the first group of valves 12, 13, and the second group 14 are closed. , 15. The buried pipe water system circulates cooling water lower than the outdoor ambient air temperature through the buried pipe water system circulating water pump 10 to the cooling coil 2, reducing the temperature outside the outer wall 1 structure, and realizing the cooling of the building outer wall. cooling, and at the same time bring the heat to the underground soil layer to achieve heat supplementation, alleviating the imbalance of soil heat absorption and discharge in winter and summer; in the transition season, close the first set of valves 12, 13, the third set of valves 16, 17, and open the second set of valves Valves 14 and 15, the temperature-increased water in the solar water heating system passes through the circulation pump 10 of the buried pipe water system to bring heat to the underground soil layer, which can better alleviate the imbalance of soil heat absorption and discharge in winter and summer.

The above-mentioned embodiments only express several implementation modes of the present invention, which should not be construed as limiting the patent scope of the present invention. For those of ordinary skill in the art, on the premise of not departing from the concept of the present invention, some modifications and improvements are within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims (10)

1. a kind of shallow layer geothermal energy and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：The system includes exterior wall, exterior wall Interior is heated or cooled coil pipe, shares Silicon-supply capacity, solar water heating system, for return water main pipe and underground pipe water system, institute State and coil pipe disengaging be heated or cooled, mouth of a river parallel communication shares on Silicon-supply capacity, the shared Silicon-supply capacity connection supplies back Water conduit tube；The underground pipe water system includes underground pipe water system pipeline and underground pipe, underground pipe water system pipeline with for return water Main pipe is connected to, and underground pipe water system water circulating pump is equipped with for return water main pipe；The solar water heating system includes solar energy heating Device, solar water heating system water circulating pump and solar water heating system pipeline, the solar water heating system pipeline and the confession The closure pipeline that return water main pipe parallel communication is formed with the underground pipe water system pipeline, in the solar water heating system pipeline With described for being designed on return water main pipe and the outer valve that coil pipe is heated or cooled within the walls and is connected to or disconnects.

2. shallow layer geothermal energy according to claim 1 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：It is described It solar heat water system pipeline and shares and is equipped with seasonal switching valve group for return water main pipe, the seasonal switching valve group includes the One group of valve, second group of valve and third group valve.

3. shallow layer geothermal energy according to claim 1 or 2 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that： The solar thermal collector selects flat plate collector or vacuum tube type heat collector, and is positioned on roof or vacant lot.

4. shallow layer geothermal energy according to claim 1 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：It is described Solar water heating system closes second group of valve, opens third group valve and first group of valve, underground pipe water system and solar energy Hot-water heating system joint is that heating coil conveys hot water, and temperature, which increases, after the water absorption geothermal energy in underground pipe flows into heating coil It is interior, and recycled by underground pipe water system water circulating pump；In solar water heating system, after solar thermal collector receives solar radiation, The raised water of temperature flows into heating coil, and is recycled by solar water heating system water circulating pump.

5. shallow layer geothermal energy according to claim 1 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：It is described Solar heat water system opens third group valve, closes second group of valve and first group of valve, underground pipe water system will be less than outdoor The cooling water of ambient air temperature by underground pipe water system water circulating pump cycle send to cooling coil, while by heat bring to In underground layer.

6. shallow layer geothermal energy according to claim 1 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：It is described Solar heat water system opens second group of valve, closes first group of valve and third group valve, temperature liter in solar water heating system High water brings heat into underground layer by underground pipe water system water circulating pump cycle.

7. shallow layer geothermal energy according to claim 1 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：It is described It is provided in exterior wall and multigroup coil pipe and in parallel with shared Silicon-supply capacity respectively, the shared Silicon-supply capacity is heated or cooled Being equipped with multiple free ends has the horizontal transverse-pipe with blockage, and setting triple valve, which is respectively communicated with, on horizontal transverse-pipe is heated or cooled Coil pipe intake-outlet.

8. shallow layer geothermal energy according to claim 1 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：It is described Silicon-supply capacity setting is shared indoors or in interior conduit well, shares and is equipped with air bleeding valve at the top of Silicon-supply capacity；The confession Return water main pipe is placed in the trench or basement of underground.

9. shallow layer geothermal energy according to claim 1 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：It is described Underground pipe is single U-shaped or double-U-shaped vertical buried pipe or spiral horizontal coiled pipe.

10. shallow layer geothermal energy according to claim 1 and solar energy composite exterior wall preserving temperature and reducing temperature system, it is characterized in that：Institute It states and coil pipe is heated or cooled as PPR, PE, the serpentine coil of aluminum plastic composite pipe material.