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Title: The effect of input temperatures on the absorber parameters
Authors: Uludağ Üniversitesi/Mühendislik Fakültesi/Makina Mühendisliği Bölümü.
Atmaca, İbrahim
Altuğ, Yiğit
Kılıç, Muhsin
Keywords: Mass-transfer
Temperature effect
Mass transfer
Cooling systems
Absorption chillers
Computer programming
Heat transfer
Lithium compounds
Nusselt number
Thermal effects
Issue Date: Nov-2002
Publisher: Pergamon-Elsevier Science
Citation: Atmaca, İ. vd. (2002). "The effect of input temperatures on the absorber parameters". International Communications in Heat And Mass Transfer, 29(8), 1177-1186.
Abstract: In an absorption cooling system, simultaneous heat and mass transfer operations take place in the absorber and generator. The performance of an absorber is of paramount importance on the coefficient of performance and the manufacturing cost of an absorption machine. Increasing heat and mass transfer coefficients in an absorber decreases the heat transfer area of the absorber, as a result of this the cost of the system can be reduced. The absorption of water vapor in aqueous solutions of lithium bromide is modelled for a falling-film, vertical-tube absorber. Heat and mass transfer coefficients are determined by calculating temperature and concentration variations at the falling film in the absorber. Then mean Nusselt and Sherwood numbers are determined to see the changes in the heat and mass transfer. Subsequently, a modular computer program has been developed for absorption systems to simulate various cycle configurations and absorber parameters. So, the effect of hot water, chilled water and cooling water inlet temperatures on the coefficients of performance, Nusselt and Sherwood numbers and the surface area of the absorber are studied with the simulation program. The results can be used to optimise the commercial absorption chillers.
ISSN: 0735-1933
Appears in Collections:Scopus
Web of Science

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