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窗负荷在整个空调负荷中占很大的份量。我国的建筑物多以自然采光为主,这个问题尤显突出。因此,应对窗负荷作认真的研究,这对空调节能来说,具有重要意义。理论分析的结果表明,玻璃外窗的得热量由两个分量组成:1.直接透过窗玻璃进入室内的短波日射热流q_t;2.玻璃窗自身吸收日射热后,以对流及长波辐射的形式传入室内侧的热流q_i。后面这部分热流,与窗玻璃表面温度、表面放热系数、室内外空气温度等因素有关,一般称之为窗面热流。实测这两个热流量是研究窗负荷的一项重要的内容。
Window load in the air conditioning load in a large share. Most of the buildings in our country are mainly natural daylighting, which is especially conspicuous. Therefore, the window load should be seriously studied, which is energy-saving air-conditioning, is of great significance. The results of theoretical analysis show that the heat gain of the glass outer window is composed of two components: 1. The short-wave solar heat flux entering the indoor directly through the window glass q_t; 2. The glass window absorbs the solar heat by itself and flows in the form of convection and long-wave radiation The incoming heat flow to the indoor side q_i. Behind this part of the heat flow, and the window surface temperature, surface heat release coefficient, indoor and outdoor air temperature and other factors, generally referred to as window heat flow. The two measured heat fluxes are an important part of the study window load.