Abstract
A thermodynamic analysis performed on a single-stage vapour absorption heat transformer brings out the influence of mass transfer effectiveness of the generator on its performance parameters. The working fluid pairs considered for the heat transformer are R21-DMF and R21-DMETEG. The variations in the performance parameters, namely, heating coefficient of performance, exergetic efficiency, concentration difference and circulation ratio, with the changes in generator effectiveness are studied. As expected, an increase in generator effectiveness results in the improvement of the coefficient of performance, exergetic efficiency and concentration difference across the absorber. The extent of improvement is more pronounced for R21-DMETEG than for R21-DMF. Correlations are presented for quick estimation of performance parameters under different operating conditions.
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