نتایج جستجو برای: thermal insulation

تعداد نتایج: 223177  

Nowadays, the high rates of energy consumption of buildings in contemporary societies, as well as in global problematics such as climate change, depletion of natural resources and environmental pollution, is widely recognized. In this context, energy efficiency of buildings has become a crucial aspect of national and international energy policies. Nevertheless, the design of high performance bu...

2016
Ziang Jing Changming Li Hong Zhao Guiling Zhang Baozhong Han

The doping effect of graphene nanoplatelets (GNPs) on electrical insulation properties of polyethylene (PE) was studied by combining experimental and theoretical methods. The electric conduction properties and trap characteristics were tested for pure PE and PE/GNPs composites by using a direct measurement method and a thermal stimulated current (TSC) method. It was found that doping smaller GN...

2015
Yang Yang Jinliang He Guangning Wu Jun Hu

Insulation performance of the dielectrics under extreme conditions always attracts widespread attention in electrical and electronic field. How to improve the high-temperature dielectric properties of insulation materials is one of the key issues in insulation system design of electrical devices. This paper studies the temperature-dependent corona resistance of polyimide (PI)/Al2O3 nanocomposit...

2014
Bongsu Choi Tae - Ho Song

Vacuum insulation panel (VIP) is a promising thermal insulator for buildings, refrigerator, LNG carrier and so on. In general, it has the thermal conductivity of 2~4 mW/m·K. However, this thermal conductivity is that measured at the center of VIP. The total effective thermal conductivity of VIP is larger than this value due to the edge conduction through the envelope. In this paper, the edge co...

2003
T. K. Saha

The oil/paper insulation system in a transformer degrades under various chemical, thermal and electromechanical stresses during its operation. Dielectric response measurements like the Return Voltage Measurement (RVM) and Polarisation and Depolarisation Current (PDC) measurement are currently being used for condition assessment of the insulation. In the current research project, the ageing cond...

Journal: :Frontiers of Architectural Research 2013

Journal: :Mountain Research and Development 2012

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