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物理清洗方式与膜箱浊度对浸没式超滤膜的影响研究 被引量:1
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作者 白海浪 朱圆圆 +1 位作者 王攀 杨波 《水处理技术》 CAS CSCD 北大核心 2015年第3期108-111,共4页
采用浸没式超滤处理舟山海域的高浊度海水,研究空曝气作用、气水联合反冲洗过程的气量与水量、膜箱浊度等在膜清洗过程的影响作用。结果表明,一定时间范围内的空曝气对膜丝表面的滤饼层有较好的去除效果,气水联合反洗过程中,反洗水量与... 采用浸没式超滤处理舟山海域的高浊度海水,研究空曝气作用、气水联合反冲洗过程的气量与水量、膜箱浊度等在膜清洗过程的影响作用。结果表明,一定时间范围内的空曝气对膜丝表面的滤饼层有较好的去除效果,气水联合反洗过程中,反洗水量与气量保持在合理的范围就可保持良好的清洗效果,曝气体积流量3 m3/h(标准状态),反洗水量为产水量的80%即为经济合理值,单独的上/下端进水反洗或先上/下端进水+下/上端进水的差异不大,膜箱浊度对膜污染有较大的影响作用,浸没式膜箱中浊度应保持在1 000 NTU以内。 展开更多
关键词 浸没式超滤 空曝气 汽水联合反冲洗 膜箱浊度
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Impact of cold indoor thermal environmental conditions on human thermal response 被引量:6
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作者 刘红 谭青 +2 位作者 李百战 谈美兰 马小磊 《Journal of Central South University》 SCIE EI CAS 2011年第4期1285-1292,共8页
To explore the thermal responses under the non-thermal equilibrium cold environmental conditions,a laboratory study was conducted in climate chamber.The local skin temperatures and thermal sensation of 20 subjects wer... To explore the thermal responses under the non-thermal equilibrium cold environmental conditions,a laboratory study was conducted in climate chamber.The local skin temperatures and thermal sensation of 20 subjects were recorded at 10 min intervals for 90 min under air temperatures of 7.4,9.1,11 and 15 °C.The results show that both local skin temperatures and mean skin temperature decrease not only with the drop of ambient air temperature but also with the exposure time.Local thermal sensation and overall the thermal sensation have the similar temperature-varying and time-varying characteristics.Predicted mean vote(PMV) model cannot correctly predict the thermal sensation under non-thermal equilibrium cold environment.The correlation between local thermal sensation and local skin temperatures shows that thermal sensation is closely related to skin temperature.Skin temperature is an effective indicator of thermal sensation.A linear relationship model between overall thermal sensation and mean skin temperature,considering both ambient temperature and exposure time,was established in the non-thermal equilibrium cold environment,which makes the evaluation of thermal sensation more objective. 展开更多
关键词 indoor thermal environment thermal comfort thermal sensation skin temperature human thermal response
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Cavity flow regime for spillway aerators 被引量:6
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作者 WU JianHua MA Fei 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第4期818-823,共6页
It is well known that the effect of air entrainment for cavitation damage controls is related not only to the air discharge into aerator devices but also the flow regime of the cavity below them.On the basis of the hy... It is well known that the effect of air entrainment for cavitation damage controls is related not only to the air discharge into aerator devices but also the flow regime of the cavity below them.On the basis of the hydraulic characteristics of the flow,the aerator devices were for the first time classified.The theoretical considerations were performed about the jet length and cavity flow regime with the influencing factors.Comparing with the behavior of the flow through the aerator of discharge tunnels,the flow regimes of the cavity below spillway aerators were experimentally investigated,and the empirical expressions were presented to identify the conversions of the cavity flow regimes,including fully filled cavity,partially filled cavity,and net air cavity.Some issues of the design of the aerator devices were suggested in the present work. 展开更多
关键词 AERATOR air entrainment CAVITY discharge tunnel flow regime SPILLWAY
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