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Method and system for collecting and improving heat energy in a greenhouse

A thermal energy and greenhouse technology, applied in the field of agricultural engineering, can solve problems such as application limitations, achieve the effects of increasing temperature, improving operating efficiency, and reducing investment costs

Inactive Publication Date: 2011-12-14
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The groundwater source heat pump system has been widely used in buildings, but due to the restriction of the initial investment cost in facility agriculture, its application in greenhouses is limited

Method used

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  • Method and system for collecting and improving heat energy in a greenhouse

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Embodiment Construction

[0030] The application mode of the present invention will be illustrated below by taking a solar greenhouse with a length of 75m, a span of 8.5m, and a ridge height of 3.2m as an example.

[0031] As shown in the drawings, the present invention mainly includes a thermal energy harvester 1 , a thermal energy storage 13 and a heat pump unit 5 structurally.

[0032] The thermal energy storage 13 is mainly composed of parallel heat exchange tubes evenly installed underground. The heat exchange tubes are connected to the sub-collector, and the inside is filled with water. Through the circulation of water, it is used to store the heat collected by the back wall during the day; it is used to extract the shallow layer at night The heat in the soil provides the heat source for the heat pump unit. The heat pump unit 5 raises the heat stored in the thermal energy storage, and then transfers the raised heat to the heat collector 1 for release. The heat energy collector 1 is mainly compos...

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Abstract

The invention belongs to the technical field of agricultural engineering, and discloses a greenhouse heat energy collection and heat energy raising method and system, which can realize the heat energy storage of transferring and storing the heat collected by the heat energy collector arranged on the back wall in the shallow soil of the greenhouse during the daytime At night, the heat of the thermal energy storage in the shallow soil is used as the initial heat source, and the heat is raised by the heat pump before heating the greenhouse to increase the night temperature of the solar greenhouse. The method of the invention uses solar energy as a heat source, does not produce harmful gases, and has no pollution to the environment; the heat collection system uses the shallow soil heat source of the greenhouse, which reduces the initial investment cost; the heat in the greenhouse can be transferred to the shallow soil during the day , the temperature of the shallow soil is increased, and the operating efficiency of the heat pump unit is also improved.

Description

technical field [0001] The technical field that the present invention relates to is agricultural engineering technical field, specifically, the present invention relates to a method and system for collecting and heating shallow soil heat in a greenhouse. Background technique [0002] Although solar greenhouses can collect solar energy to store heat and release heat when the indoor temperature drops to ensure that the indoor temperature will not be too low, but when encountering extreme low temperatures, the temperature in the greenhouse is not enough to ensure the normal growth of plants. To ensure that the plants in the greenhouse can grow normally in winter, heating equipment must be provided. At present, the commonly used heating methods in solar greenhouses include hot water heating, hot air heating, electric heating, and fire path heating. These traditional heating methods consume a lot of energy, and also produce a large amount of harmful gases, which pollute the envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G9/24
CPCY02A40/25Y02P60/12Y02P60/14
Inventor 杨其长方慧魏灵玲程瑞锋刘文科梁号
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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