日光温室墙体夜间放热量计算与保温蓄热性评价方法的研究

Method for Calculation of Heat Release at Night and Evaluation for Performance of Heat Preservation of Wall in Solar Greenhouse

本文提出了以墙体夜间放热量作为评价指标的日光温室墙体保温蓄热性能评价的方法。在以付立叶级数形式表达的室内外气温等墙体工作条件下,根据一维非稳态传热的理论,采用有限差分算法,建立了日光温室墙体传热过程模拟与墙体放热量的计算方法,并开发了相应的计算机程序RGWSQCR。根据对几种墙体的夜间传热量计算结果进行非线性回归分析,建立了墙体夜间放热量简化计算的经验公式。

This article gives the evaluation method for performance of heat preservation of wall in solar greenhouse, which accepts the heat release of wall at night as the evaluation index. On the basis of the theory about one-dimensional unsteady heat transfer and finite difference method, a model on heat transfer process and a method for calculation of heat release of wall in solar greenhouse were developed, with the operating conditions for wall of inside and outside air temperature in form of Fourier series. Then the corresponding computer program called RGWSQCR was finished. Some empirical formulas with simple form for calculating heat release of wall at night were established, by nonlinear regression analysis on the calculation results of the heat transfer.