Evaluation of a heat transformer powered by a solar pond

A single-stage heat transformer operating with the water/lithium bromide mi xture was operated to demonstrate the feasibility of the use of these syste ms to increase the temperature of the heat obtained from solar ponds. Elect rical heaters at temperatures not higher than 80 degrees C were used to sim ulate the heat input to an absorption heat transformer from a solar pond. G ross temperature lifts, useful heat and coefficients of performance are plo tted for the heat transformer against temperatures and solution concentrati ons. Gross temperature lifts as high as 44 degrees C were obtained. The max imum temperature of the useful heat produced by the heat transformer operat ing with the water/lithium bromide mixture was 124 degrees C. The maximum c oefficient of performance for the unit was 0.16. (C) 2000 Elsevier Science B.V. All rights reserved.