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Analysis of the shell-in-tube condenser characteristics for energy conservation.

[In Ukrainian. / En ukrainien.]

Author(s) : NIKULSHIN R. K., MOROSUK L. I., SOKOLOVSKAYA V. V.

Type of article: Article

Summary

In this paper, the authors discuss the analysis of the basic characteristics of the heat exchangers using the met h- od of the minimization entropy generation. This method has been applied for the refrigeration m a chines in order to solve the energy saving problem. Using the data for a real shell - in - tube condenser, the following particular cases are discussed: density of the heat flow within the condenser, velocity of the second refrigerant (water) and hydraulic diameter of pipe with the second refrigerant inside. As the results of the theoretical research, the values of the three above mentioned characteristics were determined that correspond to the minimal irreversibilities within the condenser. The theoretical results are in a good agreement with the available experimental data for this design of the condense r. The theoretical research proved than the method of the minimization entropy generation let us: (a) take into the consideration interdependence between the sources of the irreversibilities (heat transfer and fluid dynamics) and (b) obtain the heat exchanger with high energy effectiveness. The authors demonstrate that the method of the minimization entropy generation is an alternative method that can be used for the optimization of heat exchangers. In comparison with the techno-economical method (commonly used for the refrigeration machines), the minimization entropy generation method (a) required decreased amount of the data for the analysis and (b) exclude the economic characteristics.

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