Entransy And Heat Loss Analysis

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Like Exergy, Entransy dissipation is also found which occurs due to thermal resistance. In a previous research work[20], Entransy was mentioned as the heat transfer potential of any substance .In another article [21], a combination of entransy & environmental analyses and entransy & the life cycle cost analyses were conducted to investigate the optimum insulation thickness of two different insulation material glasswool and rockwool . The optimum insulation thicknesses from glasswool and rockwool were found respectively 0.003 and 0.057m higher in environmental analysis than life cycle cost analysis Consideration of moisture content for optimum thickness: Building envelopes exposed to the hot, extreme humid surroundings with intense…show more content…
Types of Insulation Commercial insulation materials Fibrous material Cellular materials others Inorganic Materials glass, rock, slag wool calcium silicate Perlite, vermiculite, and ceramic products Organic Materials cellulose, cotton, wood, pulp, cane, synthetic fibers cork, foamed rubber, polystyrene, polyethylene, polyurethane, other polymers Now various kind of Metallic or metallized reflective membranes are also available. Advanced materials Several innovative materials like vacuum insulation panels, gas filled panels and aerogels have been developed recently by researchers and manufacturers , to obtain extremely low values of thermal conductivity together with reduced mass per unit volume and thickness. Vacuum Insulation Panels Recent research works[25]–[27] have identified that vacuum insulation panels (VIPs) are truly efficient and pertinent for sustainable building design. Structurally VIPs are enveloped into a multilayer film and have an evacuated open porous structure .Distinctive structural characteristics have made VIPs excellent insulation material with very poor thermal conductivity as low as 3-4mW/mk. Simen et al.[28] expressed the overall thermal conductivity of VIPs as, λ_tot = λ_sol+λ_gas +λ_rad+λ_conv Where, λ_sol =solid state thermal conductivity λ_gas =gas thermal conductivity, λ_rad =radiation

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