A new test method about the time constant of the solar collector has been presented in this paper. It is simple and has been validated through experiments. With the new method it is not necessary to adjust the inlet temperature of the transfer fluid as closely as possible to the ambient air temperature. Also, it is not necessary to know the characteristic parameters of the collector in advance. The model used in the paper is a first order system model, as in most cases. The experimental data obtained from the test of solar collector time constant shows that the solar collector is not a strictly first order system. A criterion is proposed to decide whether the system is a first order system or not and the resemblance of the system to the first order system.

吸附制冷技术作为一种低品位热能驱动的绿色制冷技术, 目前已经成为国际上普遍关注的一个学术方向. 文中简述了吸附制冷技术的发展历史, 评述了吸附制冷技术在吸附剂、吸附理论、热量回收过程、吸附床技术方面的进展, 阐述了近几年来吸附制冷方面的典型研究成果与典型样机, 最后指出了吸附制冷技术今后的主要发展方向.

Considering the basic heat transfer rules of superfluid helium and the phase diagram of helium, pressure effects on heat transfer to Hell are especially studied. If the bath pressure is less than λ-Pressure (Pλ), special peak heat flux desity relations are shown to correlate bath pressure, hydrostatic head and modified pressure items (van der Waals pressure and fountain pressure). If the bath pressure is greater than λ-pressure(P>Pλ), a generalized formula of peakflux density of Hellp bath is shown,.

The adsorption performance of CaCl2-NH3 is studied under the condition of different expansion spaces for adsorbent, and the relationships between adsorption performance of CaCl2-NH3 and the phenomena of swelling and agglomeration during adsorption are researched. It is found that the performance stability is related to the ratio of expansion space to the volume of adsorbent ras, and the performance attenuation is serious in the case of large ras. Severe adsorption hysteresis exists in the process of adsorption and desorption at the same evaporating and condensing temperatures, which is related to the stability constant of chemical reaction. This phenomenon cannot be explained by the theory of physical adsorption. Moderate agglomeration will be beneficial to the formation of ammoniate complex; the magnitude of expansion space will affect adsorption performance. Analysis shows that the activated energy needed in the process of adsorption for the sample with ras of 2:1 is less than that for the sample with ras of 3:1. The refrigeration performance of CaCl2-NH3 is predicted from experiments. The cooling capacity of one adsorption cycle is about 945.4kJ/kg for the adsorbent with an ras of 2:1 at the evaporating temperature of 0℃.

对一种高压静电场与紫外线照射相结合的复合净化除病毒技术进行了实验研究，旨在寻长有效杀死空气中的病毒，特别是SARS病毒的方法，为空调系统空气净化处理提供配套技术。建立了中央空调室内环境模拟系统，利用超声雾化噬菌体储备液形成稳定的病毒气溶胶源，用明胶与素琼脂双层平板通过气流冲击法回收噬菌体，以检测净化装置除尘、杀病毒效果。结果表明，采用该技术在实际应用中对PM10的过滤系数在86%以上，在试验系统中的除病毒效率可达95%.通过本课题研究建立了试验平台，并获得了工程应用验证。