空调冷负荷计算方法及软件比对及改进研究

Air conditioning cooling load calculation method and comparison and improvement of calculation software

针对目前不同空调冷负荷计算软件的计算结果差异较大的问题,应用程序比对验证的方法,选取了43个算例,对计算结果进行了比对分析。对于不同软件采用的模型,不同得热类型中对流与辐射得热量的分配比例和辐射在房间各表面的分配模型差异较大;不同软件的修正方法也存在差异。软件主要采用传递函数法和谐波反应法,其得热量的理论计算结果基本一致,但冷负荷计算结果存在差异。以国际上关于得热量中对流和辐射比例的最新研究成果替换软件原有数据,改进辐射在室内各表面的分配模型,提高了计算精度和准确度。计算结果表明,对计算方法规范和完善后,不同计算软件计算结果的差异可减小到10%以内。

Considering the marked differences in calculation results by existed calculation software, compares and analyses the calculation results of 43 examples by a program comparison and verification method. For the models of different software, there are notable variances in the convection share and radiation share for different heat gain types, and the distribution models of radiation heat between the inner surfaces; and the correction factors are different. The software mainly adopt the harmonic response method and the cooling load coefficient method, of which the theoretical calculation result of heat gain are approximately identical while the cooling load calculation result are different. Improves the calculation precision and accuracy by substituting the convection and radiation proportions of heat gain from the latest international research findings for the original data and improving the distribution model of radiation heat between the inner surfaces. As a result, the calculation deviation of different software can be reduced to less than 10% by improving the calculation method.