Solar regenerative heating device for greenhouse heating

Abstract

The invention discloses a solar regenerative heating device for greenhouse heating, which comprises a heat collection system and a heating system. The heat collection system comprises a solar thermal collector and a water tank communicated with the solar thermal connector through a first circulation pipeline. The heating system comprises a coil radiator, a manifold, a water collector and a buried tube heat exchanger, wherein the coil radiator is communicated with the water tank through a second circulation pipeline, the manifold and the water collector are connected to the water tank through a third circulation pipeline, the buried tube heat exchanger is connected between the manifold and the water collector, the coil radiator can be used as a heating device for the heating system, heat of the water tank can be used for heating, and heat stored in the buried tube heat exchanger in the underground soil inside a greenhouse in a non-heat-supply season can also be used for heating. By means of the solar regenerative heating device for greenhouse heating, seasonal storage of solar heat is realized, greenhouse heating is less susceptible to seasons and sunshine amount, the greenhouse heating is continuous and effective, and solar energy utilization rate is increased.

Description

technical field [0001] The invention relates to the field of solar heating, in particular to a solar thermal storage heating device for greenhouse heating. Background technique [0002] A greenhouse is an artificially established microclimate system suitable for the growth of crops. The particularity of this system lies in the high heat transfer coefficient of the enclosure structure, fast heat leakage, and basically no heat storage capacity compared with conventional buildings, so there will be a small temperature difference between indoor and outdoor in winter, which cannot meet the 12-15°C temperature of greenhouse crops. The question of minimum temperature requirements. At present, there are mainly two types of heating systems for greenhouses, namely hot air heating systems and hot water heating systems. The hot air heating system often uses a fuel-fired hot air stove, that is, after the return air in the greenhouse is heated, it is sent to the room through a plastic f...

AI Technical Summary

Problems solved by technology

The solar hot water heating system can solve the above problems, but due to the low solar energy density on the earth's surface, and the characteristics of seasonal and day-night changes, the energy collection of the solar hot water heating system at night and during periods without sunshine becomes a problem. As a result, the solar hot water heating system inevitably has great instability, and the efficiency of solar energy utilization becomes very low.

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