论文信息 - The upgrading of waste heat by means of water-sulphuric acid absorption heat transformers

The upgrading of waste heat by means of water-sulphuric acid absorption heat transformers

Abstract The technical and economic feasibility of a single-stage water-sulphuric acid heat transformer, as evaluated through a simplified mathematical model, is discussed in this paper. Three different criteria of optimality are considered. The first two respectively account for the exergetic and the enthalpic value of the useful heat. The third criterion is based on an approximate evaluation of the fixed and operating costs, considered proportional to the inverse of the heat storage capacity. An analysis based on the values of the coefficient of performance and of the mass flow rates, expressed as a function of the gross temperature lift, points out the significance of the criterion based on the heat storage capacity. This result is also supported by considering the ability of the heat transformer to maintain its performance in different external conditions.

Vincenzo Tufano | Paolo Ciambelli | P. Ciambelli | V. Tufano

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