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ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL STUDY OF A SOLAR LITHIUM BROMIDE-WATER ABSORPTION COOLING SYSTEM
Submission Author:
Raquel Miguez de Carvalho , SP , Brazil
Co-Authors:
Raquel Miguez de Carvalho, Kamal Ismail
Presenter: Raquel Miguez de Carvalho
doi://10.26678/ABCM.ENCIT2018.CIT18-0061
Abstract
Air conditioners and electric showers are responsible for a large percentage of the daily electricity end-uses in the residential sector in Brazil. These energy demands can be supplied by available solar energy technologies. The objective of this paper is to calculate the cooling load and the overall performance of a solar lithium bromide-water single-effect absorption cooling system powered by a parabolic trough collector (PTC) for residential air conditioning application. The weather input data used is from Campinas-SP, Brazil. Firstly, a home-built numerical code was developed using finite volume method (FVM) to calculate the heat absorbed by the collector and its performance, then the Engineering Equation Solver (EES) software was used to calculate the absorption cooling subsystem performance and its cooling load. The integration of the cooling system with the collector resulted in an overall efficiency of about 50%. The results showed that in summer, the collector capacity of cooling per collector aperture area is 279 BTU/m² for a 24h/day operation and 676 BTU/m² for a 10h/day operation, while in winter, the corresponding values are 205 BTU/m² for a 24h/day operation and 519 BTU/m² for a 10h/day operation.
Keywords
solar absorption system, Solar Energy, cooling cycle, parabolic trough collector, thermal comfort
