Heat storage-heat supply system and its application in hydroponics

Abstract

Disclosed are a thermal storage and supply system and application of the thermal storage and supply system on water culture in the field of greenhouse water cultivation plants. The thermal storage and supply system comprises a thermal collection device, a thermal accumulator buried in the ground, an overground thermal supply system and a thermal insulation water tank, wherein the overground thermal supply system and the thermal insulation water tank are arranged in a greenhouse. The water inlet end and the water outlet end of the thermal accumulator are connected with the water outlet end and the water inlet end of the thermal collection device respectively, and hot water of the thermal collection device circulates to the thermal accumulator so as to achieve thermal storage; the first water inlet end of the thermal insulation water tank is connected with the water outlet end of the thermal collection device, a second water inlet end of the thermal insulation water tank is connected with the water outlet end of the thermal accumulator, and the thermal insulation water tank can obtain the hot water from the thermal collection device and the thermal accumulator; the overground thermal supply system is arranged in a seedbed water culture groove, the water inlet end and the water outlet end of the overground thermal supply system are connected with the water outlet end and the water return end of the thermal insulation water tank respectively, and the thermal insulation water tank supplies the plants with heat. The thermal storage and supply system can collect and store the heat in summer and provide the greenhouse with the heat in winter; not only is the thermal storage quantity large and is thermal loss small, but also continuous thermal supply can be achieved regardless of rainy days and nights, and thermal collection, thermal storage and thermal supply of the greenhouse all the year round are achieved.

Description

technical field [0001] The invention relates to a method in the technical field of agricultural planting, in particular to a heat storage-heat supply system and its application in hydroponic cultivation. Background technique [0002] In order to ensure the annual supply of vegetables and flowers, greenhouse cultivation methods in protected areas are often used. At present, Venlo-type smart glass greenhouses are widely used as seedling production plants, which need to provide heat for the greenhouse in the cold winter. There are mainly the following six heating methods in winter: [0003] Heating wire heating: that is, by heating the electric heating wire laid on the bottom of the seedbed, the purpose of directly heating the cultivation substrate is achieved. Its advantages are low investment, flexible layout, fast heating, and more suitable for seedbed heating. The disadvantages are uneven temperature distribution, high power consumption, poor safety, difficult to control,...

AI Technical Summary

Problems solved by technology

[0011] The present invention aims at the above-mentioned deficiencies existing in the prior art, and provides a heat storage-heat supply system and its application in hydroponic cultivation, using the soil in the greenhouse (1m 2 Greenhouse area with thermal storage soil volume 1.74m 3 ) heat storage, by embedding (burial depth 10.5m) a large number of U-shaped heat exchange tubes to absorb and store the light and heat of solar water heaters, not only has a large amount of heat storage, but also has good thermal insulation performance, which can realize annual heat storage and winter heating without heating. Affected by continuous rainy days, there is no need for auxiliary heating, which solves the problem that the general heating system cannot achieve heat storage in summer and heat supply in winter

Images