Nano-antimony-doped tin oxide(ATO) was synthesized using the sol-gel method.A colloidal dispersion of ATO nanoparticles in distilled water was achieved using a milling process in which different dispersants were stu...Nano-antimony-doped tin oxide(ATO) was synthesized using the sol-gel method.A colloidal dispersion of ATO nanoparticles in distilled water was achieved using a milling process in which different dispersants were studied.In this paper,different factors that affect the stability of ATO nanoparticles were discussed,such as zeta potential,dispersant,and pH value.Sodium polyphosphate was a suitable dispersant for stabilizing ATO nanoparticles in distilled water.A stable dispersion of ATO nanoparticles in distilled water was prepared.The stable dispersion of ATO nanoparticles was used to prepare nano-thermal insulation glass paint to block near-infrared rays of sunlight.展开更多
Polyvinylchloride(PVC)panel is one of the most favorite decorative materials that has been popularly applied as finishing of ceiling in residential buildings.It is about five years that the people incline to redecorat...Polyvinylchloride(PVC)panel is one of the most favorite decorative materials that has been popularly applied as finishing of ceiling in residential buildings.It is about five years that the people incline to redecorate the ceiling of old buildings with PVC panel in big cities of Iran,such as Mashad.In this study,the influence of ceiling PVC panel on the cooling and heating loads of studied apartment were determined by software DeST-h.In addition,the summer natural ventilation of the mentioned apartment is investigated by determining the wind speed into the apartment through the computational fluid dynamics(CFD)software.The evaluation of environment indoor wind velocity showed that most of the apartment space is a comfortable zone.The results of studied building analyses demonstrated that using PVC panel on the ceiling can decline the energy consumption of the penthouse(fifth level)of the investigated building,which is about 3.7%and 7%for studied methods of without and with air layer,respectively.In addition,although the existence of air layer can decline the cooling and heating loads,the increase in air layer thickness did not show significant decrease on building energy consumption.However,the PVC panel is expensive and is not suitable to be used for ceiling thermal insulation,but adding a thin layer of air between ceiling and PVC panel can be a good step toward sustainable building,when the people are inclined to utilize it as a decorative ceiling.展开更多
Taking a certain housing in Guangzhou as an example,we conduct the field measurement of the microclimate at fixed points for air temperature,relative humidity,black globe temperature and wind speed,etc.We investigate ...Taking a certain housing in Guangzhou as an example,we conduct the field measurement of the microclimate at fixed points for air temperature,relative humidity,black globe temperature and wind speed,etc.We investigate the effects of manmade lake,shade of trees and ground surface character on outdoor thermal environment,and make a quantitative analysis on the weighting position of the landscape design factors in design behavior.The study intends to explore a method to improve the thermal environment of residential quarters by changing the corresponding factors.展开更多
基金financed by the China Postdoctoral Science Foundation(2012M511809)the National Natural Science Foundation of China(51178189)the Guangdong-Hongkong Breakthrough Project in Key Areas(2004A30310001)
文摘Nano-antimony-doped tin oxide(ATO) was synthesized using the sol-gel method.A colloidal dispersion of ATO nanoparticles in distilled water was achieved using a milling process in which different dispersants were studied.In this paper,different factors that affect the stability of ATO nanoparticles were discussed,such as zeta potential,dispersant,and pH value.Sodium polyphosphate was a suitable dispersant for stabilizing ATO nanoparticles in distilled water.A stable dispersion of ATO nanoparticles in distilled water was prepared.The stable dispersion of ATO nanoparticles was used to prepare nano-thermal insulation glass paint to block near-infrared rays of sunlight.
基金funded by the 111 Project(No.111-2-13)and the State Key Laboratory of Subtropical Building Science,South China University of Technology,China(No.200833)。
文摘Polyvinylchloride(PVC)panel is one of the most favorite decorative materials that has been popularly applied as finishing of ceiling in residential buildings.It is about five years that the people incline to redecorate the ceiling of old buildings with PVC panel in big cities of Iran,such as Mashad.In this study,the influence of ceiling PVC panel on the cooling and heating loads of studied apartment were determined by software DeST-h.In addition,the summer natural ventilation of the mentioned apartment is investigated by determining the wind speed into the apartment through the computational fluid dynamics(CFD)software.The evaluation of environment indoor wind velocity showed that most of the apartment space is a comfortable zone.The results of studied building analyses demonstrated that using PVC panel on the ceiling can decline the energy consumption of the penthouse(fifth level)of the investigated building,which is about 3.7%and 7%for studied methods of without and with air layer,respectively.In addition,although the existence of air layer can decline the cooling and heating loads,the increase in air layer thickness did not show significant decrease on building energy consumption.However,the PVC panel is expensive and is not suitable to be used for ceiling thermal insulation,but adding a thin layer of air between ceiling and PVC panel can be a good step toward sustainable building,when the people are inclined to utilize it as a decorative ceiling.
基金This experimental analysis was supported by the National Natural Science Foundation of China(Grant Nos.50538040 and 50720165805).
文摘Taking a certain housing in Guangzhou as an example,we conduct the field measurement of the microclimate at fixed points for air temperature,relative humidity,black globe temperature and wind speed,etc.We investigate the effects of manmade lake,shade of trees and ground surface character on outdoor thermal environment,and make a quantitative analysis on the weighting position of the landscape design factors in design behavior.The study intends to explore a method to improve the thermal environment of residential quarters by changing the corresponding factors.