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Titolo:
Systematic analysis on combined heat and water transfer through porous materials based on thermodynamic energy
Autore:
Ozaki, A; Watanabe, T; Hayashi, T; Ryu, Y;
Indirizzi:
Nat Resources Canada, Ottawa, ON K1A 0E4, Canada Nat Resources Canada Ottawa ON Canada K1A 0E4 Ottawa, ON K1A 0E4, Canada
Titolo Testata:
ENERGY AND BUILDINGS
fascicolo: 4, volume: 33, anno: 2001,
pagine: 341 - 350
SICI:
0378-7788(200104)33:4<341:SAOCHA>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Keywords:
heat and water transfer; analytical model; thermodynamics; driving force; water potential; force potential; diffusivities of heat and water flux;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Ozaki, A Nat Resources Canada, 580 Booth St,13F, Ottawa, ON K1A 0E4, Canada Nat Resources Canada 580 Booth St,13F Ottawa ON Canada K1A 0E4 da
Citazione:
A. Ozaki et al., "Systematic analysis on combined heat and water transfer through porous materials based on thermodynamic energy", ENERG BLDG, 33(4), 2001, pp. 341-350

Abstract

A new thermodynamic energy 'water potential' based on the principles of chemical potential of an element of mixed gas is defined as the driving forceof gaseous phase water flux. Adhesive power or 'capillary action' and a portion of the water potential, is confirmed as the driving force of liquid phase water flux. A numerical model of combined heat and water transfer using the water potential is introduced and influences of forces, such as gravity and pressure on water flux are incorporated from the viewpoint of thermodynamics. A way to estimate diffusivities of gaseous and liquid phase waterthrough porous materials is also shown. Accuracy of the numerical model isdemonstrated through a comparison between calculation and experiment for different temperature gradients and water content in a porous material. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 11:59:50