The main features of top-flcor rooms with natural ventilation are identified by investigating indoor thermal environment in summer season. One is high indoor air temperature, for this reason the indoor climate is far ...The main features of top-flcor rooms with natural ventilation are identified by investigating indoor thermal environment in summer season. One is high indoor air temperature, for this reason the indoor climate is far beyond the thermal comfort standard; the other is the inhomogeneons temperature distribution of the inner wall surfaces, and high temperature of the inner surface of the roof causes much scorching to the head of occupant. This is the characteristic of such rooms. Both features mentioned above should be considered comprehensively for the evaluation of indoor thermal environment of the top-floor rooms with asymmetric radiant field. In order to characterize the indoor thermal environment of the rooms, the heat stress index, HSI and radiant heat flux reaching human head, Q_R should be introduced simultaneously as thermal indexes for the indoor climate evaluation. The application of the indexes to a topfloor room is presented and analyzed.展开更多
At present,laminar airflow(LAF)systems and mixing ventilation(MV)systems are two commonly used ventila-tion solutions for operating rooms(ORs)to ensure the required indoor air quality.However,recent studies have shown...At present,laminar airflow(LAF)systems and mixing ventilation(MV)systems are two commonly used ventila-tion solutions for operating rooms(ORs)to ensure the required indoor air quality.However,recent studies have shown that there is little difference in the prevalence of surgical site infection(SSI)for the LAF systems and MV systems.The objective of this study was to compare the performance of an LAF system with an MV system in ORs at St.Olavs hospital,Norway.In this study,all the experimental measurements were conducted in real ORs with LAF and MV systems.This study found that the air velocity above the surgical incision is approximately two times higher in the OR with LAF than that in the OR with MV.The use of surgical lamps and different airflow patterns may contribute to the different surgical microenvironment of ORs with LAF and MV.展开更多
The effect of the courtyard on moderating the hush climate and improving the thermal environment of the courtyard style cave dwelling, and the interaction amongst the ambient, the courtyard and its surrounding cave ro...The effect of the courtyard on moderating the hush climate and improving the thermal environment of the courtyard style cave dwelling, and the interaction amongst the ambient, the courtyard and its surrounding cave rooms were investigated. A field measurement was carried out in such a typical dwelling in the winter. The results presented in this paper prove the ability of this dwelling to transform an extreme winter environment outside cave rooms into a better outdoor community space and will be helpful for modern architects to seek a low cost housing solution with concern for sustainable development.展开更多
基金This work was supported by the National Natural Science Foundation for Distinguished Young Scholars (Grant No. 50125821)
文摘The main features of top-flcor rooms with natural ventilation are identified by investigating indoor thermal environment in summer season. One is high indoor air temperature, for this reason the indoor climate is far beyond the thermal comfort standard; the other is the inhomogeneons temperature distribution of the inner wall surfaces, and high temperature of the inner surface of the roof causes much scorching to the head of occupant. This is the characteristic of such rooms. Both features mentioned above should be considered comprehensively for the evaluation of indoor thermal environment of the top-floor rooms with asymmetric radiant field. In order to characterize the indoor thermal environment of the rooms, the heat stress index, HSI and radiant heat flux reaching human head, Q_R should be introduced simultaneously as thermal indexes for the indoor climate evaluation. The application of the indexes to a topfloor room is presented and analyzed.
文摘At present,laminar airflow(LAF)systems and mixing ventilation(MV)systems are two commonly used ventila-tion solutions for operating rooms(ORs)to ensure the required indoor air quality.However,recent studies have shown that there is little difference in the prevalence of surgical site infection(SSI)for the LAF systems and MV systems.The objective of this study was to compare the performance of an LAF system with an MV system in ORs at St.Olavs hospital,Norway.In this study,all the experimental measurements were conducted in real ORs with LAF and MV systems.This study found that the air velocity above the surgical incision is approximately two times higher in the OR with LAF than that in the OR with MV.The use of surgical lamps and different airflow patterns may contribute to the different surgical microenvironment of ORs with LAF and MV.
基金Supported by the National Natural Science Foundation of China (59638210).
文摘The effect of the courtyard on moderating the hush climate and improving the thermal environment of the courtyard style cave dwelling, and the interaction amongst the ambient, the courtyard and its surrounding cave rooms were investigated. A field measurement was carried out in such a typical dwelling in the winter. The results presented in this paper prove the ability of this dwelling to transform an extreme winter environment outside cave rooms into a better outdoor community space and will be helpful for modern architects to seek a low cost housing solution with concern for sustainable development.
