نتایج جستجو برای: thermal performance factor

تعداد نتایج: 2036146  

Journal: :ACS nano 2013
Ashkan Behnam Vinod K Sangwan Xuanyu Zhong Feifei Lian David Estrada Deep Jariwala Alicia J Hoag Lincoln J Lauhon Tobin J Marks Mark C Hersam Eric Pop

We examine the high-field operation, power dissipation, and thermal reliability of sorted carbon nanotube network (CNN) devices, with <1% to >99% semiconducting nanotubes. We combine systematic electrical measurements with infrared (IR) thermal imaging and detailed Monte Carlo simulations to study high-field transport up to CNN failure by unzipping-like breakdown. We find that metallic CNNs car...

Journal: :physical chemistry research 0
mohammad reza sovizi malek ashtar university of technology ghasem fakhrpour department of chemistry, malek ashtar university of technology ali reza madram department of chemistry, malek ashtar university of technology

in this work, thermal degradation behavior of a fuel-rich energetic mixture containing epoxy binder was studied by thrmogravimetric analysis and differential scanning calorimetry under dynamic nitrogen atmosphere at different heating rates. variation of the thermal degradation activation energy of the mixture was evaluated by differential and integral isoconversional methods via akts software p...

Air pre-cooling equipment is normally being employed in air-conditioning systems for pre-cooling the ambient outdoor air to enhance the air-conditioning systems performance. In this study, the potential of a passive water-to-air heat pipe based heat exchanger (HPHEX) for air pre-cooling purpose in air-conditioning systems for the high cooling load demanding regions of Iran was investigated. To ...

2015
Hugh S. Winwood-Smith Lesley A. Alton Craig E. Franklin Craig R. White

Temperature has pervasive effects on physiological processes and is critical in setting species distribution limits. Since invading Australia, cane toads have spread rapidly across low latitudes, but slowly into higher latitudes. Low temperature is the likely factor limiting high-latitude advancement. Several previous attempts have been made to predict future cane toad distributions in Australi...

2011
Yongqing Wang

This study presents a thermal and economic performance analysis of a LT-MEE (low-temperature multieffect evaporation) water desalination system coupled with an LiBreH2O ABHP (absorption heat pump). A 60e78% water production increase over a stand-alone LT-MEE run at the same heat source conditions can be obtained owing to the coupling. A detailed thermodynamic sensitivity analysis of the ABHP-ME...

Journal: :iranian journal of applied animal science 2013
a.h. ganaie r.s. ghasura n.a. mir n.a. bumla g. sankar

the variation in climatic variables like temperature, humidity and radiations were recognized as the potential hazards in the growth and production of all domestic livestock species. thermal environment is a major factor that can negatively affect both production and reproduction in dairy animals, especially in animals of high genetic merit. among the stressors, heat stress has been of major co...

Journal: :معماری و شهرسازی آرمان شهر 0
mohammadjavad mahdavinejad assist professor of architecture, faculty of art and architecture, tarbiat modares university, tehran, iran. negar badri msc student of low-energy architecture, faculty of arts and architecture, tehran college of fine art university, kish campus, kish, iran. maryam fakhari msc student of low-energy architecture, faculty of arts and architecture, tehran college of fine art university, tehran, iran. mahya haqshenas master student of architecture, faculty of arts and architecture, tehran paradise fine art university, kish campus, kish, iran.

as a covering method of buildings` roof, domed roofs have mostly been applied in iranian vernacular architecture and also in the middle east region according to adobe material abundance comparing with timber. furthermore, dome remains in the first place in architectural designs due to large area coverage and favorable thermal performance; so that it has been widely utilized in mosques, shrines,...

Journal: :international journal of nano dimension 0
s.e. ghasemi young researchers and elite club, qaemshahr branch, islamic azad university, qaemshahr, iran. gh. r. mehdizadeh ahangar department of mechanical engineering, yazd university, yazd, iran.

in the present work the effect of cu-water nanofluid, as heat transfer fluid, on the performance of a parabolic solar collector was studied numerically. the temperature field, thermal efficiency, mean-outlet temperatures have been evaluated and compared for the conventional parabolic collectors and nanofluid based collectors. further, the effect of various parameters such as fluid velocity, vol...

Thermal mass is the material's ability to store heat and release it after an amount of time and concrete is considered one of the best thermal mass material. Since concrete has been used widely in many building constructions, by considering the capability of concrete in terms of thermal mass, it is worthwhile to use this ability of concrete in order to build buildings more healthy and comfortab...

The present paper focuses on numerical study for an inclined magneto-hydrodynamic effect on free convection flow of a tangent hyperbolic nanofluid embedded with Carbon nanotubes (CNTs) over a stretching surface taking velocity and thermal slip into account. Two types of nanoparticles are considered for the study; they are single and multi-walled nanotubes. The presentation of single-parameter g...

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