Simplified analysis of coupled heat and mass transfer pr°Cesses in an open cycle solar C/R

Li Yutong, Hongxing Yang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Application of the open cycle solar collectors/regenerators (C/R) is an effective way to utilize low-grade solar thermal energy to concentrate desiccant solution for air-conditioning. This paper aims at developing an analytical model for the coupled heat and mass transfer pr°Cess inside an open cycle solar C/R. Within narrow range of operating conditions, linear approximations were made to find the dependence of equilibrium humidity ratio on the solution temperature, constant properties and coefficients. New parameters, which represent the heat and mass transfer driving forces, were defined and the basic differential equations were rearranged to obtain two coupled non-homogeneous linear equations. The effects of the climate conditions were organized as non-homogenous parts, which allow direct evaluation. The analytical expressions for water evaporative rate and outlet conditions of the desiccant solution and scavenge air were further developed based on the analytical solution. A parametric analysis of the solar C/R has been performed to reveal the effects of climate conditions and system variables on the rate of evaporation of water from the solution. The ratio of the solution to the air mass flow rate was also found to be an important controlling parameter. Based on the simulation results, the possible optimization methods for the solar C/R and operating variables were also discussed.
Original languageEnglish
Title of host publicationISES Solar World Congress 2007, ISES 2007
Pages1975-1980
Number of pages6
Volume3
Publication statusPublished - 1 Dec 2007
EventInternational Solar Energy Society Solar World Congress 2007, ISES 2007 - Beijing, China
Duration: 18 Sep 200721 Sep 2007

Conference

ConferenceInternational Solar Energy Society Solar World Congress 2007, ISES 2007
CountryChina
CityBeijing
Period18/09/0721/09/07

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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