Surface air cooler-heat pump combined heat collection system and operation method thereof

Abstract

The invention discloses a surface air cooler-heat pump combined heat collection system and an operation method thereof, and belongs to the field of agricultural facilities. A water inlet of a surfaceair cooler-fan is connected with a heat collection tank and a heat storage tank through a water supply L-shaped three-way ball valve, and a water outlet of the surface air cooler-fan is connected withthe heat collection tank and the heat storage tank through a water return L-shaped three-way ball valve; the heat collection tank and the heat storage tank are connected through heat pump and transmit heat, and the energy collected during the daytime is stored in the heat storage tank while controlling the water temperature in the heat collection tank through the heat pump. In the surface air cooler-heat pump combined heat collection system and the operation method thereof, the heat pump is combined with the active heat collection system, so that the water temperature of the heat collection tank in a daytime system can be effectively reduced, so that the heat collection efficiency of the system is improved; the total capacity of a reservoir is reduced by at least 30%, so that a large amount of indoor space is prevented from being occupied, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of agricultural facilities, and specifically relates to a surface cooler-heat pump combined heat collection system and an operating method thereof. Background technique [0002] Solar greenhouses and greenhouses are the two main types of horticultural facilities in my country. Especially solar greenhouses are widely used in northern China. They have the advantages of energy saving and low cost, and can effectively meet the needs of winter vegetable production. A traditional solar greenhouse stores heat energy through the north wall during the day and releases it to heat the indoor air at night. However, because the accumulation and release process of heat energy in the wall cannot be controlled artificially, the controllability is poor, and the heat stored and released is limited, resulting in poor indoor temperature regulation ability, which is not conducive to the improvement of crop yield and quality. ...

AI Technical Summary

Problems solved by technology

[0004] The existing surface cooler-fan heat collection and release system can effectively improve the temperature controllable level in the solar greenhouse, but under the weather conditions with weak solar radiation such as alpine regions or cloudy days, the heat collection efficiency of the system is low, and the heat collection Small, the heating effect at night is limited, and the system COP is low; at the same time, the surface cooler-fan heat collection and release system needs to be equipped with a large-volume heat storage pool. In practical applications, 3 sets of surface cooler-fan need to be equipped with about 4.6m 3 The hot water storage tank not only takes up a lot of indoor space in the greenhouse, but also increases the construction cost

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