空调动态负荷变步长计算方法

Air Conditioning Load Calculation with Variable Time Steps

多层墙体传热反应系数／Ｚ传递系数的异步长关系，为发展变步长的反应系数法／Ｚ传递函数法开辟了一条可行的途径．本文进一步提出了多层墙体传热反应系数／Ｚ传递系数异步长关系的一种修正形式，将异步长关系由单向拓展为双向，并在此基础上，结合线性系统叠加原理，提出空调动态负荷计算的反应系数法和变步长Ｚ传递函数法，可以有效地降低计算量．

Relations of thermal response factors (TRF)/heat conduction transfer function (CTF) coefficients of multi layer slabs between different time step sizes had been presented. In this paper, the modified relations of TRF/CTF coefficients between different time step sizes were developed, which expanded the one way relations to two way ones. With the variable time step technique, new algorithms of TRF/CTF methods for fast calculation of air conditioning loads were developed on the basis of the principle of superposition in linear systems. It shows better effect in application than the traditional methods in which constant time step was used.