Optimisation and cost analysis of a lithium bromide absorption solar cooling system
Date Issued
June 2007
Author(s)
Abstract
This paper presents the optimisation of the various components of a lithium bromide (LiBr)
absorption solar cooling system such as the type, slope and area of solar collector and storage
tank size. The collector types considered are the flat plate, compound parabolic and evacuated
tube collectors. The optimisation is based on an energy benefit analysis, i.e., the amount of
useful energy collected against the life cycle cost of the solar system. The above analysis
considers the current prices for fuel and equipment costs, which have increased greatly during
the last 5 years. A solar absorption system consisting of a lithium bromide-water unit, a solar
collector and a storage tank is modelled with the TRNSYS computer program using a typical
meteorological year (TMY) for a hot climate (Nicosia, Cyprus). For this analysis a typical
house is modelled for a full year. The solar system can be used during summer to provide part
of the heat required by the absorption unit and during winter to provide part of the heating
load. The results indicate that due to the present high cost of fuel a large part of the building
load can be covered with solar energy.
absorption solar cooling system such as the type, slope and area of solar collector and storage
tank size. The collector types considered are the flat plate, compound parabolic and evacuated
tube collectors. The optimisation is based on an energy benefit analysis, i.e., the amount of
useful energy collected against the life cycle cost of the solar system. The above analysis
considers the current prices for fuel and equipment costs, which have increased greatly during
the last 5 years. A solar absorption system consisting of a lithium bromide-water unit, a solar
collector and a storage tank is modelled with the TRNSYS computer program using a typical
meteorological year (TMY) for a hot climate (Nicosia, Cyprus). For this analysis a typical
house is modelled for a full year. The solar system can be used during summer to provide part
of the heat required by the absorption unit and during winter to provide part of the heating
load. The results indicate that due to the present high cost of fuel a large part of the building
load can be covered with solar energy.
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