Simplified design and calculation method of morphological feature parameters of solar-greenhouse building space

Abstract

The invention discloses a simplified design and calculation method of morphological feature parameters of a solar-greenhouse building space, and belongs to the field of energy-saving design of facility agriculture buildings. When a geographical latitude of a construction project site, a vegetable production critical-period which a greenhouse needs to ensure and a span of the solar greenhouse which needs to be constructed are determined, optimal design values of the morphological feature parameters, such as a high-span ratio of the solar greenhouse, rear-roof projection length and north-wall height under a corresponding span condition, of the solar-greenhouse building space can be calculated and obtained according to the method of the invention by consulting local average outdoor-air temperature and daily average total solar radiation amount in the corresponding period. Calculation results show that during an overwintering production period of solar greenhouses, the amount of heat which needs to be provided to the ''optimal-design greenhouse'' is 8340 MJ under a condition of ensuring that greenhouse environment temperature is not lower than 8 DEG C, and is decreased by 14.7% as compared with 9670MJ of the ''current greenhouse'', an energy-saving effect is significant, and an advantageous condition is provided for fully utilizing solar energy or other renewable energy sources as supplemental heat sources by the greenhouse.

Description

technical field [0001] The invention relates to a design method for optimizing design parameters of solar greenhouse building space shape characteristics using passive building design technology and efficiently utilizing solar energy according to climate characteristics in different geographical latitude regions, belonging to the field of energy-saving design of facility agricultural buildings. Background technique [0002] The solar greenhouse is a facility agricultural building with a large shape factor. It uses solar energy as the main resource and uses the greenhouse effect to improve the environment for planting vegetables in winter. Its building space is composed of walls (north, east and west walls), rear roof, front roof, ground and other enclosure structures. The geometric dimensions of the building space of the greenhouse, the construction method and thermal performance of the building envelope directly affect the lighting characteristics, heat preservation and hea...

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Problems solved by technology

[0003] The solar greenhouse was founded in the early 1980s in my country. However, due to the long-term constraints of traditional and primitive agricultural building materials and construction methods, and the lack of scientific theories and technical methods, the constraints and constraints of agricultural buildings are more based on experience. The design and construction lead to low land utilization rate, and it is difficult to guarantee the quality of the hot and humid environment in the solar greenhouse. Especially, the phenomenon of low temperature and high humidity at night is serious, and the occurrence of freezing diseases and insect pests is easy to occur, which directly affects the winter production efficiency of temperature-loving fruit and vegetable crops.

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