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Plate-type heat exchanger enhanced heat transfer technology
Dec 26, 2016

Plate heat exchanger is a highly efficient and compact heat exchangers. Despite its nearly century-old, and in a few sectors of the national economy (such as food, pharmaceuticals) has broad application, but due to the high temperature, high pressure, corrosion resistance and its popularization and application in all sectors. Since the beginning of the 80 's, due to manufacturing techniques, gasket material progress and continuous improvement of heat transfer theory, plate heat exchangers were paid more and more attention in the industrial production sector.

To determine whether a new technology of enhanced heat transfer of advanced, must be evaluated. In practical use, however, there have been a variety of evaluation method and evaluation index of enhanced heat transfer. Some people advocate consumption of heat Q and pump (or fan) power ratio of n, that is energy coefficient as an index, similar to the widely used K/δ p and the dimensionless Nu/ζ for evaluation, in order to more accurately reflect the performance of enhanced heat transfer, further K/δ P1/3 and Nu/ζ 1/3 can also be used as a metric. With the development of heat transfer, heat exchangers and more to develop in the direction of small volume, light weight, and on the premise of increased efficiency, lower operation costs. On the basis of comprehensive analysis and proposes a more complete performance evaluation of data, namely, to maintain power, heat transfer area, load two of the 3 factors of heat transfer factors constant, 3rd factor in assessing the size of the heat transfer performance is good or bad.

These evaluations are only on analysis of heat exchanger in the amount of energy conversion, transmission, use and loss of, that is, based on the first law of thermodynamics. In order to reflect more accurately the loss of energy in the heat exchange process quality in theoretical study also raised a number of evaluation methods based on the second law of thermodynamics, namely analysis of exergy of heat exchangers convert, transfer, use and loss situations. But when technology application, should also take into account the use of enhanced heat transfer technology pipes after price increases and changes in operating costs, use of economic accounting methods for evaluation, namely, Thermo-economic evaluation methods.