Abstract :
In order to evaluate on-line corrosive electrolyte concentration in solar air conditioning systems, an optical technique
to determine the concentration is being proposed. With this optical sensing method, it is possible to measure
the percentage concentration of the aqueous corrosive lithium bromide solution at temperatures ranging from 25 C
to 70 C and a maximum concentration of 60%. The measurement system is based on the refractive index of the solution
and the data correlation, at several temperature and concentration values. The results of this work present a direct
method for concentration measurement of corrosive liquids and also show the correlation among the three parameters:
refractive index, temperature and weight concentration. This correlation can be used to develop the optical device for
solar air conditioning systems to control and improve efficiency.
2005 Elsevier Ltd. All rights reserved.
