Solar underground heat accumulation sunlight greenhouse heating system

Abstract

The invention belongs to the solar utilization technology and discloses a solar underground heat accumulation sunlight greenhouse heating system. According to the solar underground heat accumulation sunlight greenhouse heating system, underground soil heat accumulation heat exchange pipes are embedded in the soil under a frozen earth layer outside a sunlight greenhouse; the underground soil heat accumulation heat exchange pipes are communicated with a solar thermal collector through thermal medium output pipes and cold medium return pipes; a heat accumulation water tank and a plate type heat exchanger A are arranged inside the sunlight greenhouse; surface soil heat dissipation pipes are embedded under the surface soil inside the sunlight greenhouse; a heat accumulation water pump and the plate-type heat exchanger A and a surface soil heat exchanger, the plate-type heat exchanger A and the heat medium output pipes are communicated through the pipes. The solar underground heat accumulation sunlight greenhouse heating system has the advantages of being simple in structure, low in construction cost, convenient to construct, stable and reliable in operation, good in heating effect, free of environmental pollution and particularly suitable for popularization and application in cold regions in north China.

Description

technical field [0001] The invention belongs to the solar energy utilization technology, and mainly relates to a solar energy underground heat storage solar greenhouse heating system. Background technique [0002] The winter heating of agricultural solar greenhouses is an indispensable production facility for greenhouse production in cold northern regions. Greenhouses with heating equipment can produce normally throughout the year, with high output and good economic benefits; greenhouses without heating equipment can only be produced seasonally, with low output and poor economic benefits. Therefore, greenhouse heating directly affects and determines the development of greenhouse agriculture. In recent years, protected area cultivation represented by solar greenhouses has entered a historical period of rapid development. However, so far, the heating method of solar greenhouses in cold regions has not changed much, continuing the traditional coal boiler heating method. A lo...

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Problems solved by technology

The applicant of this patent once designed a "solar greenhouse combined with ground energy and solar energy heating device", although it has reached the design requirements of energy saving and environmental protection, and the users are satisfied, but its shortcomings are also very prominent. The cost of the series of projects is high. Second, the underground geological conditions are complex, and the construction is difficult and difficult. Third, the heating contribution rate of the solar greenhouse is low, and the operating cost is relatively high.

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