This study shows a technical,bioclimatic,and sustainable analysis of the first demountable house built entirely from glass components,Vitrohouse.The technical analysis details the construction challenges overcome to c...This study shows a technical,bioclimatic,and sustainable analysis of the first demountable house built entirely from glass components,Vitrohouse.The technical analysis details the construction challenges overcome to create a demountable house using only flat glass for all components(foundations,slabs,supporting structure,beams,roof,envelope,furnishings,kitchen fixtures,appliances).Secondly,we analyze the thermal and bioclimatic behavior of this demountable all-glass house to evaluate its energy efficiency.We also assess the contribution of Vitrohouse’s bioclimatic design to its sustainability level,using 11 of the most internationally recognized GBRSs(Green Building Rating Systems),demonstrating that it achieves a higher degree of sustainability than a conventional,non-bioclimatic home of the same size.Thirdly,we analyze the contribution of Vitrohouse’s demountable nature,showing that it has a higher level of sustainability than a conventionally built house.Finally,the sustainable analysis of its demountability is quantified using 11 GBRSs.The results show that it is perfectly feasible to construct buildings solely from flat glass,achieving high energy efficiency and sustainability.Furthermore,the glass components can be easily disassembled and reused,or recycled to manufacture new components with minimal energy consumption.展开更多
This study quantifies for the first time the contribution of high-weight demountable construction to the sustainable level of a building using 11 of the most representative and internationally used GBRSs(Green Buildin...This study quantifies for the first time the contribution of high-weight demountable construction to the sustainable level of a building using 11 of the most representative and internationally used GBRSs(Green Building Rating Systems).The scores of a prefabricated,high-weight demountable building(Sayab)were compared with those of a non-demountable building(a baseline),in both cases using 11 of the most important GBRSs.All GBRSs have found that high-weight demountable construction provides a higher level of sustainability.However,the resulting scores varied widely(from an increase of 1.4%to an increase of 22.72%),and only three GBRSs clearly valued its obvious sustainable advantages(CEDES:22.72%,DNGB:14.79%,SBTools:12.4%)while the rest valued it very little,and four of them barely valued it.The results of this case study are generalizable,since the different existing GBRSs do not have the capacity to detect small changes in high-weight demountable construction systems.However similar studies should be carried out to confirm the results obtained and accurately quantify the contribution of demountable construction to the sustainable level of buildings.展开更多
A V-shaped spacroscopic cell（V-cell） was constructed using two CaF2 optical plates for FTIR light transparent measurements in the range of 4000-1000 cm^（-1）.The spectrum of ethanol was characterized with the stand...A V-shaped spacroscopic cell（V-cell） was constructed using two CaF2 optical plates for FTIR light transparent measurements in the range of 4000-1000 cm^（-1）.The spectrum of ethanol was characterized with the standard spectra,excellent fitting was achieved with a bottom-width correction method.The principle of the V-cell was discussed,giving equations for the data interpretation.It shows that the V-cell is an auto-focus type spectroscopic cell,which can effectively avoid absorption saturation with amplifications for weak absorption bands.The V-cell design is simple and effective,easy to operate,suitable for applications in liquid samples with high absorption bands,willing to have broad application prospects.展开更多
Superconducting （SC） cavities currently used for the acceleration of protons at a low velocity range are based on half wave resonators. Due to the rising demand on high current, the issue of beam loading and space c...Superconducting （SC） cavities currently used for the acceleration of protons at a low velocity range are based on half wave resonators. Due to the rising demand on high current, the issue of beam loading and space charge problems has arisen. Qualities of low cost and high accelerating efficiency are required for SC cavities, which are properly fitted by using an SC quarter wave resonator （QWR）, We propose a concept of using QWRs with frequency 162.5 MHz to accelerate high current proton beams. The electromagnetic design and optimization of the prototype have been finished at Peking University. An analytical model derived by the transmission line theory is used to predict an optimal combination of the geometrical parameters, with which the calculation by Microwave Studio shows a good agreement. The thermal analysis to identify the temperature rise of the demountable bottom plate under various levels of thermal contact also has been done, and the maximum increment is less than 0.5 K even though the contact state is poor.展开更多
文摘This study shows a technical,bioclimatic,and sustainable analysis of the first demountable house built entirely from glass components,Vitrohouse.The technical analysis details the construction challenges overcome to create a demountable house using only flat glass for all components(foundations,slabs,supporting structure,beams,roof,envelope,furnishings,kitchen fixtures,appliances).Secondly,we analyze the thermal and bioclimatic behavior of this demountable all-glass house to evaluate its energy efficiency.We also assess the contribution of Vitrohouse’s bioclimatic design to its sustainability level,using 11 of the most internationally recognized GBRSs(Green Building Rating Systems),demonstrating that it achieves a higher degree of sustainability than a conventional,non-bioclimatic home of the same size.Thirdly,we analyze the contribution of Vitrohouse’s demountable nature,showing that it has a higher level of sustainability than a conventionally built house.Finally,the sustainable analysis of its demountability is quantified using 11 GBRSs.The results show that it is perfectly feasible to construct buildings solely from flat glass,achieving high energy efficiency and sustainability.Furthermore,the glass components can be easily disassembled and reused,or recycled to manufacture new components with minimal energy consumption.
文摘This study quantifies for the first time the contribution of high-weight demountable construction to the sustainable level of a building using 11 of the most representative and internationally used GBRSs(Green Building Rating Systems).The scores of a prefabricated,high-weight demountable building(Sayab)were compared with those of a non-demountable building(a baseline),in both cases using 11 of the most important GBRSs.All GBRSs have found that high-weight demountable construction provides a higher level of sustainability.However,the resulting scores varied widely(from an increase of 1.4%to an increase of 22.72%),and only three GBRSs clearly valued its obvious sustainable advantages(CEDES:22.72%,DNGB:14.79%,SBTools:12.4%)while the rest valued it very little,and four of them barely valued it.The results of this case study are generalizable,since the different existing GBRSs do not have the capacity to detect small changes in high-weight demountable construction systems.However similar studies should be carried out to confirm the results obtained and accurately quantify the contribution of demountable construction to the sustainable level of buildings.
文摘A V-shaped spacroscopic cell（V-cell） was constructed using two CaF2 optical plates for FTIR light transparent measurements in the range of 4000-1000 cm^（-1）.The spectrum of ethanol was characterized with the standard spectra,excellent fitting was achieved with a bottom-width correction method.The principle of the V-cell was discussed,giving equations for the data interpretation.It shows that the V-cell is an auto-focus type spectroscopic cell,which can effectively avoid absorption saturation with amplifications for weak absorption bands.The V-cell design is simple and effective,easy to operate,suitable for applications in liquid samples with high absorption bands,willing to have broad application prospects.
基金Supported by Major Research Plan of National Natural Science Foundation of China (91026001)
文摘Superconducting （SC） cavities currently used for the acceleration of protons at a low velocity range are based on half wave resonators. Due to the rising demand on high current, the issue of beam loading and space charge problems has arisen. Qualities of low cost and high accelerating efficiency are required for SC cavities, which are properly fitted by using an SC quarter wave resonator （QWR）, We propose a concept of using QWRs with frequency 162.5 MHz to accelerate high current proton beams. The electromagnetic design and optimization of the prototype have been finished at Peking University. An analytical model derived by the transmission line theory is used to predict an optimal combination of the geometrical parameters, with which the calculation by Microwave Studio shows a good agreement. The thermal analysis to identify the temperature rise of the demountable bottom plate under various levels of thermal contact also has been done, and the maximum increment is less than 0.5 K even though the contact state is poor.
