This work aimed to analyze the glass material used for sealing the end of a thermal collector in a parabolic trough solar power plant. Based on matched sealing requirements and application performance of glass and Kov...This work aimed to analyze the glass material used for sealing the end of a thermal collector in a parabolic trough solar power plant. Based on matched sealing requirements and application performance of glass and Kovar alloy 4J29, one borosilicate glass material （GD480S）, whose expansion coefficient was similar to that of Kovar alloy 4J29, was studied. Moreover, the effect of the ratio of SiO2 to B203 on the glass properties was explored in detail by Fourier transform infrared spectroscopy. As the SiO2 to B203 ratio in the glass increased from 4.18 to 5.77, the expansion coefficient showed a decreasing trend from 4.95×10-6/℃ to 4.55℃ 10-6/℃. In addition, the water resistance performance improved, enabling the glass material to seal well with the alloy for application in a trough solar power plant. Thus, the increase in the SiO2 to B2O3 ratio made the glass structure more compact and improved the glass performance to meet the requirements of an industrial tubular receiver.展开更多
Integrated landscaping technology of reclaiming condensed water from the thermal channel of double-pane glass curtain wall and applying the reclaimed water in micro irrigation of natural plants was explored.Selection ...Integrated landscaping technology of reclaiming condensed water from the thermal channel of double-pane glass curtain wall and applying the reclaimed water in micro irrigation of natural plants was explored.Selection of plant species for the internal space of glass curtain wall and vertical greening outside was studied to meet the ecological technological requirements of glass curtain wall.Progressive experiment of new technology and simulated calculation of indexes were applied to obtain solar radiation consumption,meet the ecological characters of plants in glass curtain walls,and finally improve indoor and outdoor thermal environment.The results showed that new ecological technologies of applying plants on glass curtain walls help realize ecological utilization of glass curtain walls,further reduce energy consumption of buildings,achieve and even surpass the standards of national 3-star green buildings.展开更多
17 MO·(8- x-y )La_2O_3·75B_2O_3· x Eu_2O_3· y Gd_2O_3 (MLBEG,M=Mg,Ca,Sr,Ba) glasses were prepared with the conventional high temperature process. The results of luminescent spectra and ESR reveal t...17 MO·(8- x-y )La_2O_3·75B_2O_3· x Eu_2O_3· y Gd_2O_3 (MLBEG,M=Mg,Ca,Sr,Ba) glasses were prepared with the conventional high temperature process. The results of luminescent spectra and ESR reveal that there are two valence states for europium ions: Eu (2+) and Eu (3+) in this system. The broad emission band peaking at 430 nm corresponds to the 5d→4f emission transition of Eu (2+) ions,and the sharp emission bands peaking at 592,616,650 and 750 nm correspond to the (() 5D_0)→(() 7F_ J) (J =1,2,3,4) emission transition of Eu (3+) ions respectively. In these boron glass networks,the kind of alkaline earth ions determines the amount of Eu (2+) ions reduced from Eu (3+) ions in air. So,the relative emission intensity of blue light and red light of the glass should be controlled by different alkaline earth ions. The experimental results illustrate that the introduction of Gd (3+) ion can distinctly improve the emission intensity ratios between the blue light and red light of the glass,which indicates that the main process of energy transfer is Gd (3+)→Eu (2+)→Eu (3+) in MLBEG system.展开更多
基金Funded by the Special Projects of Major Scientific and Technological Achievements of Hebei Province(No.13041110Z)
文摘This work aimed to analyze the glass material used for sealing the end of a thermal collector in a parabolic trough solar power plant. Based on matched sealing requirements and application performance of glass and Kovar alloy 4J29, one borosilicate glass material （GD480S）, whose expansion coefficient was similar to that of Kovar alloy 4J29, was studied. Moreover, the effect of the ratio of SiO2 to B203 on the glass properties was explored in detail by Fourier transform infrared spectroscopy. As the SiO2 to B203 ratio in the glass increased from 4.18 to 5.77, the expansion coefficient showed a decreasing trend from 4.95×10-6/℃ to 4.55℃ 10-6/℃. In addition, the water resistance performance improved, enabling the glass material to seal well with the alloy for application in a trough solar power plant. Thus, the increase in the SiO2 to B2O3 ratio made the glass structure more compact and improved the glass performance to meet the requirements of an industrial tubular receiver.
基金Supported by Foundation Program of Suzhou Low-carbon Economy and Technology Research Center:Innovation and Design of Low Carbon Emission for Suzhou Green Urban Architectural Complex(Q313801010)
文摘Integrated landscaping technology of reclaiming condensed water from the thermal channel of double-pane glass curtain wall and applying the reclaimed water in micro irrigation of natural plants was explored.Selection of plant species for the internal space of glass curtain wall and vertical greening outside was studied to meet the ecological technological requirements of glass curtain wall.Progressive experiment of new technology and simulated calculation of indexes were applied to obtain solar radiation consumption,meet the ecological characters of plants in glass curtain walls,and finally improve indoor and outdoor thermal environment.The results showed that new ecological technologies of applying plants on glass curtain walls help realize ecological utilization of glass curtain walls,further reduce energy consumption of buildings,achieve and even surpass the standards of national 3-star green buildings.
文摘17 MO·(8- x-y )La_2O_3·75B_2O_3· x Eu_2O_3· y Gd_2O_3 (MLBEG,M=Mg,Ca,Sr,Ba) glasses were prepared with the conventional high temperature process. The results of luminescent spectra and ESR reveal that there are two valence states for europium ions: Eu (2+) and Eu (3+) in this system. The broad emission band peaking at 430 nm corresponds to the 5d→4f emission transition of Eu (2+) ions,and the sharp emission bands peaking at 592,616,650 and 750 nm correspond to the (() 5D_0)→(() 7F_ J) (J =1,2,3,4) emission transition of Eu (3+) ions respectively. In these boron glass networks,the kind of alkaline earth ions determines the amount of Eu (2+) ions reduced from Eu (3+) ions in air. So,the relative emission intensity of blue light and red light of the glass should be controlled by different alkaline earth ions. The experimental results illustrate that the introduction of Gd (3+) ion can distinctly improve the emission intensity ratios between the blue light and red light of the glass,which indicates that the main process of energy transfer is Gd (3+)→Eu (2+)→Eu (3+) in MLBEG system.
