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ambient air temperature effects on the temperature of sewage sludge composting process

Journal of Environmental Sciences 2005年第6期17卷 1004-1007页

作者： HUANG Qi-fei CHEN Tong-bin GAO Ding HUANG Ze-chun Chinese Research Academy of Environmental Sciences Beijing 100012 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

Using data obtained with a full-scale sewage sludge composting facility, this paper studied the effects of ambient air temperature on the composting temperature with varying volume ratios of sewage sludge and recycled compost to bulking agent. Two volume ratios were examined experimentally, 1 ： 0 ： 1 and 3 ： 1 ： 2. The results show that composting temperature was influenced by ambient air temperature and the influence was more significant when composting was in the temperature rising process： composting temperature changed 2.4-6.5℃ when ambient air temperature changed 13℃. On the other hand, the influence was not significant when composting was in the high-temperature and/or temperature falling process： composting temperature changed 0.75-1.3℃ when ambient air temperature changed 8-15℃. Hysteresis effect was observed in composting temperature＇s responses to ambient air temperature. When the ventilation capability of pile was excellent（at a volume ratio of 1：0：1）, the hysteresis time was short and ranging 1.1-1.2 h. On the contrary, when the proportion of added bulking agent was low, therefore less porosity in the substrate（at a volume ratio of 3：1：2）, the hysteresis time was IonQ and ranging 1.9-3.1 h.

关键词： sewage sludge composting ambient air temperature hysteresis

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Influence of the ambient air temperature on the electrical contact reliability of electromagnetic relay

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第3期8卷 485-489页

作者： YAO Fang ZHENG Jian-rong HUANG Zhang-wu People Electric Appliances Group Yueqing 32560 China

The dynamic contact resistances of HH52P electromagnetic relays are measured under different ambient air tem- perature. Their diagnostic parameters are extracted and determined. It is found that the ambient air temperature obviously influ- ences some parameters. In order to research its influence on the electrical contact reliability of electromagnetic relay, the statistic analysis is applied to study the static contact resistance, the max of the dynamic contact resistance and the bounce time. It is found that the ambient air temperature regularly influences the three parameters. Thoroughly, the phenomenon is studied and analyzed in the point of material science so as to probe into the essential matter of it.

关键词： ambient air temperature Electromagnetic relay Electrical contact reliability Contact resistance Bounce time

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The influence of environment temperatures on single crystalline and polycrystalline silicon solar cell performance

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Science China(Physics,Mechanics & Astronomy) 2012年第2期55卷 235-241页

作者： WEN Cai FU Chao TANG JinLong LIU DeXiong HU SiFu XING ZhiGang School of Science Laboratory for Extreme Conditions Matter PropertiesSouthwest University of Science and TechnologyMianyang 621010China Epilight Technology Co. Ltd.Shanghai 201203China

The influence of the cell temperature (named interior environment temperature) and ambient air temperature (named exterior environment temperature) on the open-circuit voltage,short-circuit current,and output power has been carefully studied for the Si solar *** results show that one of the environment temperatures plays the major role,and the temperature dependence of device performance parameters is different for single crystalline and polycrystalline Si solar ***,the ambient air temperature builds a bridge for the comparison of the effect between the cell temperature and the illumination intensity on solar cell *** on the experimental results,the reasons which cause the difference of the environment temperatures dependence are analyzed.

关键词： Si solar cell cell temperature ambient air temperature illumination intensity cell performance

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