Analysis of the behavior of an experimental absorption heat transformer for water purification for different mass flux rates in the generator

In the present study, first and second laws of thermodynamics have been used to analyse the performance of an experimental absorption heat transformer for water purification. Irreversibilities, coefficients of performance (COP) and exergy coefficients of performance (ECOP) were determined as function of the mass flow of hot water supplied to the generator and as function of the overall thermal specific energy consumption (OSTEC) parameter defined in this paper. The results showed that the system irreversibilities increase meanwhile the coefficients of performance and the exergy coefficient of performance decrease with an increment of the mass flow of hot water supplied to the generator. Also it was shown that the system performance is better when the production of purified water increases due to the increment of the heat recycled to the generator and evaporator.

► Exergetic performance of an absorption heat transformer for purifying water to different mass flux rates in the generator.
► The irreversibilities are increasing when the mass flow rate in the generator is major.
► The mass flow rates in the generator plays a decisive role in the whole system efficiency.