Circularly geoheat exchanging underground energy-accumulating liquid reservoir and its construction process

Abstract

The circularly geoheat exchanging underground energy-accumulating liquid reservoir system consists of one or several underground liquid reservoirs, heat carrying medium, underground heat exchange pipes, circularly conveying pipeline, etc. The underground liquid reservoirs and the heat carrying medium has collected natural cold or heat containing geoheat energy, the underground heat exchange pipes are connected to the underground liquid reservoirs, and the circularly conveying pipeline is set in the channel between the underground liquid reservoirs and the ground. The present invention has great amount of stored energy, environment friendship, high heat exchange speed and high heat exchange efficiency.

Description

technical field [0001] The invention belongs to the application field of renewable energy and environmental protection and energy-saving technologies, and in particular relates to a circulating geothermal heat exchange type underground energy storage liquid storehouse and a construction method thereof. Background of the invention [0002] Surface water and soil are a huge solar collector, collecting 47% of the sun's energy, which is more than 500 times the energy used by humans every year. The ground source heat pump system is a high-efficiency circulating heat exchange system that uses underground shallow renewable energy, including groundwater, soil, or surface water. By inputting a small amount of high-grade energy into the heat pump, a large amount of low-temperature energy is obtained to high-temperature energy. transfer output. [0003] The main forms used in existing heat pump technologies are air source heat pumps, water source heat pumps or ground source heat pumps...

AI Technical Summary

Problems solved by technology

Buried heat exchange tube type circulating geothermal heat exchange type underground energy storage liquid storage can be used as a front-end coupling part of soil buried tube heat pump system, usually divided into: horizontal buried pipe, vertical buried pipe and spiral coil pipe, among which, the most An effective soil buried pipe setting method is to set up soil buried pipes by excavating buried pipes or vertically burying an underground U-shaped pipe at a certain interval. These technologies have been widely used in North American countries and have been proven to be used to solve problems such as The energy supply problem of air conditioning and hot water (see: "Energy saving mechanism of ground source heat pump", Journal of Solar Energy Sinica vol.25, No.1), wherein, the way of horizontal excavation buried pipe is as announced in Chinese patent ZL200420015826.7 " Shallow soil ground temperature water source heat pump” is not commonly used due to the need for a large amount of earthwork work and the cost has increased sharply. Spiral pipe buried pipes also need to be excavated and buried pipes, and the heat transfer effect is not as good as that of U-shaped pipes vertically buried pipes; non-excavation The method of buried pipes only relies on U-shaped soil buried pipes for heat exchange, which requires relatively high material and geological structure of the soil heat exchanger, so the efficiency is not high enough. The system is generally suitable for residential single buildings with relatively small areas. It is relatively difficult to apply in large-scale projects, and the underground drilling depth of vertical buried pipes is large, the project period is long, and the cost is high. Usually, the cost of underground drilling projects accounts for 50% of the entire project, especially when it is applied in cities. The dense distribution of buildings and public facilities makes construction very inconvenient, and due to the high price of urban land, the construction of soil buried pipes for the above-mentioned engineering operations is greatly affected by the distance between ground buildings and occupies a large amount of surface area, and U-shaped pipe soil heating The device is also adversely affected by a large amount of contact heat transfer in the near-surface soil section, which limits its application in many situations

[0005] In summary, due to the above-mentioned defects and use restrictions in the existing technology, in order to better solve the problem of using renewable energy such as earth heat storage to provide building air conditioning With regard to the large-scale popularization and application of low-level cold and hot energy required for hot water energy supply and production, it is necessary to consider from a new perspective to make a comprehensive breakthrough in the constraints of existing technologies

Images