In the present work the use of a particular kind of non conventional plate-fin heat exchanger (PFHE), inspired to the cross-flow heat exchangers as basic element of hear recovery steam generators (HRSG), is analysed.. The new concept of heat exchanger, as recently proposed in the literature, can be interesting as modular solution, to increase efficiencies and to reduce the dimensions of HRSG by means of various packaging solutions. Basing on this particular HRSG structure concept, a mathematical model is devised to predict the heat transfer and the performances of the HRSG and of the single section and an optimum design strategy has been outlined. The optimization procedure is concentrated on the gas side finned surface and is articulated in two different steps. A first step aimed to the minimization of the pressure losses for a given heat flow or to the maximization of the heat flow for a given value of the pressure losses. The second step permits a reduction of the weight for imposed HRSG performance. The procedure is tested on a basic 1.5 MW HRSG structure
Optimization of Modular Compact Heat Exchanger for Heat Recovery Steam Generator
FRANCO, ALESSANDRO
2002-01-01
Abstract
In the present work the use of a particular kind of non conventional plate-fin heat exchanger (PFHE), inspired to the cross-flow heat exchangers as basic element of hear recovery steam generators (HRSG), is analysed.. The new concept of heat exchanger, as recently proposed in the literature, can be interesting as modular solution, to increase efficiencies and to reduce the dimensions of HRSG by means of various packaging solutions. Basing on this particular HRSG structure concept, a mathematical model is devised to predict the heat transfer and the performances of the HRSG and of the single section and an optimum design strategy has been outlined. The optimization procedure is concentrated on the gas side finned surface and is articulated in two different steps. A first step aimed to the minimization of the pressure losses for a given heat flow or to the maximization of the heat flow for a given value of the pressure losses. The second step permits a reduction of the weight for imposed HRSG performance. The procedure is tested on a basic 1.5 MW HRSG structureI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
