Systematic Derivation of the New Potential Model on Combined Heat and Water Transfer Based on Thermodynamics

Research output: Contribution to journalArticle

Abstract

A thermodynamic energy “water potential” based on the principles of chemical potential of an element of mixed gas is defined as the driving force of gaseous phase water transfer. Adhesive power or “capillary action” and a portion of the water potential, is confirmed as the driving force of liquid phase water transfer. 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 transfer are incorporated from the viewpoint of thermodynamics. A way to estimate diffusivities of gaseous and liquid phase water through porous materials and the thermodynamic relations between such diffusivities and the potential are also shown.

Original languageEnglish
Pages (from-to)17-24
Number of pages8
JournalJournal of Asian Architecture and Building Engineering
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 1 2003

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heat
Thermodynamics
water
Water
Hot Temperature
Heat
Chemical potential
Liquids
Porous materials
Numerical models
Adhesives
Gravitation
energy
Gases

All Science Journal Classification (ASJC) codes

  • Architecture
  • Civil and Structural Engineering
  • Cultural Studies
  • Building and Construction
  • Arts and Humanities (miscellaneous)

Cite this

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AB - A thermodynamic energy “water potential” based on the principles of chemical potential of an element of mixed gas is defined as the driving force of gaseous phase water transfer. Adhesive power or “capillary action” and a portion of the water potential, is confirmed as the driving force of liquid phase water transfer. 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 transfer are incorporated from the viewpoint of thermodynamics. A way to estimate diffusivities of gaseous and liquid phase water through porous materials and the thermodynamic relations between such diffusivities and the potential are also shown.

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