The Experts below are selected from a list of 6696 Experts worldwide ranked by ideXlab platform
Kim D Pressnail - One of the best experts on this subject based on the ideXlab platform.
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quantifying and predicting performance of the solar dynamic buffer zone sdbz Curtain Wall through experimentation and numerical modeling
Energy and Buildings, 2010Co-Authors: Russell Richman, Kim D PressnailAbstract:Abstract The recent rise in the environmental and economic costs of energy demands a need to design and build more sustainable building systems. Curtain Wall assemblies show great promise—the spandrel panels within them can be natural solar collectors. By using a solar dynamic buffer zone (SDBZ) in the spandrel cavity, solar energy can be efficiently gathered using the movement of air. There is a need for a numerical model capable of predicting performance of this system. This paper presents the quantification of a prototype SDBZ Curtain Wall system through experimental testing in a laboratory environment. Results from the experimental testing were used to validate a one-dimensional numerical model of the prototype. This research shows a SDBZ Curtain Wall system as an effective means of reducing building heating energy consumption. The numerical model showed good correlation with experimental results in the expected operating range of the system. Given the lack of published literature for similar systems, this research acts to validate a simple, innovative approach to collect solar energy that would otherwise be lost to the exterior using already existing components within a Curtain Wall. This research shows the SDBZ Curtain Wall has the potential to act as a significant solar collector.
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a more sustainable Curtain Wall system analytical modeling of the solar dynamic buffer zone sdbz Curtain Wall
Building and Environment, 2009Co-Authors: R C Richman, Kim D PressnailAbstract:Abstract Given the increases in both the environmental and economic costs of energy, there is a need to design and build more sustainable and low-energy building systems now. Curtain Wall assemblies are engineered Wall assemblies that are used widely in both high-rise as well as low-rise construction. These assemblies show great promise—with the minimal modification outlined in this paper they can be built better now. Often ignored, spandrel panels that comprise a part of Curtain Wall assemblies can be natural solar collectors. By using a new, simple, low-cost method such as a solar dynamic buffer zone (SDBZ), solar energy can be efficiently gathered or excluded using the movement of air. Such a method can be used in both retrofit as well as new construction. This paper will introduce and outline a proposed SDBZ Curtain Wall system and present the results of analytical modelling. Using these results, a SDBZ system will be shown to be a more sustainable option for traditional Curtain Wall assemblies.
Richard A Behr - One of the best experts on this subject based on the ideXlab platform.
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dynamic racking performance of an earthquake isolated Curtain Wall system
Earthquake Spectra, 2000Co-Authors: Jamie L Brueggeman, Ali M Memari, Richard A Behr, Heinrich Wulfert, Paul A KremerAbstract:Abstract Dynamic racking tests, coupled with air leakage tests, were performed on fullsize specimens of a new, Earthquake‐Isolated Curtain Wall System and a widely used, conventional Curtain Wall system (used as an experimental control). Dynamic racking tests simulated seismic movements that could be imposed upon a Curtain Wall system as a result of interstory drifts. Air leakage tests were performed as an indicator of serviceability performance of both Curtain Wall systems during the dynamic racking tests. The Earthquake‐Isolated Curtain Wall System demonstrated strongly superior performance in terms of both serviceability (glass cracking and air leakage) and life safety (glass fallout). The conventional system exhibited vulnerability to annealed monolithic glass cracking and glass fallout at dynamic racking drift indices of 1.9% and 3.1%, respectively. No glass damage was observed in the earthquake‐isolated system up to the dynamic racking displacement limit of the test facility, which corresponded to a...
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dynamic racking tests of Curtain Wall glass elements with in plane and out of plane motions
Earthquake Engineering & Structural Dynamics, 1995Co-Authors: Richard A Behr, Abdeldjelil Belarbi, J H CulpAbstract:This project was conducted to investigate the breakage and fallout behaviour of various types of architectural glass elements in a dry-glazed Curtain Wall system under in-plane and out-of-plane dynamic motions. The project was a follow-up to an earlier project that focused exclusively on in-plane dynamic racking performance of Curtain Wall glass elements. The recent data indicated that adding out-of-plane motions caused significantly higher amounts of glass breakage and subsequent glass fallout in most glass types that were found during the in-plane tests to be prone to glass fallout. Specifically, 1/4 in (6 mm) annealed monolithic glass, 1/4 in annealed monolithic glass with a 0·004 in (0·10 mm) PET film (not anchored to the mullions), and 7/16 in (11 mm) fully tempered laminated glass exhibited comparable or higher fallout rates than the already substantial fallout rates that were observed during the in-plane only racking tests. Unanchored window film was found to be ineffective in resisting post-breakage glass fallout under dynamic racking motions. In contrast, 1/4 in (6 mm) annealed laminated glass and 7/16 in (11 mm) heat-strengthened laminated glass exhibited no glass fallout during the out-of-plane tests, just as they exhibited no fallout during the in-plane tests. Out-of-plane test results also showed that 3/8 in (10 mm) heat-strengthened monolithic glass exhibited no fallout, while 3/8 in annealed monolithic glass exhibited very negligible glass fallout. The addition of torsional motions was not found to induce glass fallout in those glass types that resisted glass fallout in previous tests performed without torsional motions.
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dynamic in plane racking tests of Curtain Wall glass elements
Earthquake Engineering & Structural Dynamics, 1994Co-Authors: Chris P Pantelides, Richard A BehrAbstract:Attention has been paid recently to the potentially serious life safety and economic loss issues related to the seismic performance of ‘architectural,’ or ‘non-structural’ building elements such as glass lites in Curtain Wall systems. In response, a pilot study was undertaken at the University of Missouri-Rolla to investigate the dynamic racking performance of a 15·6 × 12·0 ft (4·56 × 3·68 m) section of Curtain Wall containing three 5 × 6 ft (1·52 × 1·84 m) glass panels. The Curtain Wall system was a ‘wide mullion’ design that had generous 1 in (25 mm) clearances between glass edges and the aluminium glazing pocket. Dynamic racking tests were performed totally in plane; no out-of-plane or torsional motions were included. Various types of glass specimens were tested, including annealed, heat-strengthened and fully tempered glass in monolithic and laminated configurations. Dry glazed and two-side structural silicone Curtain Walls were tested. Test results for dry glazed specimens showed that annealed and heat-strengthened laminated glass experienced no fallout whatsoever. By contrast, annealed monolithic glass experienced frequent fallout in both small and large shards. Fully tempered monolithic glass experienced dicing, which resulted in occasional fallout of entire glass lites. Loss of rigidity in fully tempered laminated glass (when both glass plies were broken) occasionally caused entire lites to fall out. Polyester film (not anchored to the mullions) was applied to annealed monolithic glass; it prevented small shards from falling out, but sometimes contributed to entire lite fallout after the onset of severe glass cracking. Annealed laminated glass units with two-side structural silicone glazing exhibited only very minor glass damage and no glass fallout.
Russell Richman - One of the best experts on this subject based on the ideXlab platform.
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quantifying and predicting performance of the solar dynamic buffer zone sdbz Curtain Wall through experimentation and numerical modeling
Energy and Buildings, 2010Co-Authors: Russell Richman, Kim D PressnailAbstract:Abstract The recent rise in the environmental and economic costs of energy demands a need to design and build more sustainable building systems. Curtain Wall assemblies show great promise—the spandrel panels within them can be natural solar collectors. By using a solar dynamic buffer zone (SDBZ) in the spandrel cavity, solar energy can be efficiently gathered using the movement of air. There is a need for a numerical model capable of predicting performance of this system. This paper presents the quantification of a prototype SDBZ Curtain Wall system through experimental testing in a laboratory environment. Results from the experimental testing were used to validate a one-dimensional numerical model of the prototype. This research shows a SDBZ Curtain Wall system as an effective means of reducing building heating energy consumption. The numerical model showed good correlation with experimental results in the expected operating range of the system. Given the lack of published literature for similar systems, this research acts to validate a simple, innovative approach to collect solar energy that would otherwise be lost to the exterior using already existing components within a Curtain Wall. This research shows the SDBZ Curtain Wall has the potential to act as a significant solar collector.
R C Richman - One of the best experts on this subject based on the ideXlab platform.
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a more sustainable Curtain Wall system analytical modeling of the solar dynamic buffer zone sdbz Curtain Wall
Building and Environment, 2009Co-Authors: R C Richman, Kim D PressnailAbstract:Abstract Given the increases in both the environmental and economic costs of energy, there is a need to design and build more sustainable and low-energy building systems now. Curtain Wall assemblies are engineered Wall assemblies that are used widely in both high-rise as well as low-rise construction. These assemblies show great promise—with the minimal modification outlined in this paper they can be built better now. Often ignored, spandrel panels that comprise a part of Curtain Wall assemblies can be natural solar collectors. By using a new, simple, low-cost method such as a solar dynamic buffer zone (SDBZ), solar energy can be efficiently gathered or excluded using the movement of air. Such a method can be used in both retrofit as well as new construction. This paper will introduce and outline a proposed SDBZ Curtain Wall system and present the results of analytical modelling. Using these results, a SDBZ system will be shown to be a more sustainable option for traditional Curtain Wall assemblies.
J H Culp - One of the best experts on this subject based on the ideXlab platform.
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dynamic racking tests of Curtain Wall glass elements with in plane and out of plane motions
Earthquake Engineering & Structural Dynamics, 1995Co-Authors: Richard A Behr, Abdeldjelil Belarbi, J H CulpAbstract:This project was conducted to investigate the breakage and fallout behaviour of various types of architectural glass elements in a dry-glazed Curtain Wall system under in-plane and out-of-plane dynamic motions. The project was a follow-up to an earlier project that focused exclusively on in-plane dynamic racking performance of Curtain Wall glass elements. The recent data indicated that adding out-of-plane motions caused significantly higher amounts of glass breakage and subsequent glass fallout in most glass types that were found during the in-plane tests to be prone to glass fallout. Specifically, 1/4 in (6 mm) annealed monolithic glass, 1/4 in annealed monolithic glass with a 0·004 in (0·10 mm) PET film (not anchored to the mullions), and 7/16 in (11 mm) fully tempered laminated glass exhibited comparable or higher fallout rates than the already substantial fallout rates that were observed during the in-plane only racking tests. Unanchored window film was found to be ineffective in resisting post-breakage glass fallout under dynamic racking motions. In contrast, 1/4 in (6 mm) annealed laminated glass and 7/16 in (11 mm) heat-strengthened laminated glass exhibited no glass fallout during the out-of-plane tests, just as they exhibited no fallout during the in-plane tests. Out-of-plane test results also showed that 3/8 in (10 mm) heat-strengthened monolithic glass exhibited no fallout, while 3/8 in annealed monolithic glass exhibited very negligible glass fallout. The addition of torsional motions was not found to induce glass fallout in those glass types that resisted glass fallout in previous tests performed without torsional motions.
