Regras de temperatura média para operação eficiente de trocadores de calor de teflon

Regras de temperatura média para operação eficiente dos trocadores de calor de Teflon:

Teflon heat exchangers are widely used in waste heat recovery and thermal systems. In order to obtain economic benefits, it is necessary to participate in the optimization design of heat exchangers. Teflon heat exchangers can recover heat energy, but increase investment and operating costs. The optimization design of Teflon heat exchangers is not a good way to unify. Reconhece-se que mais práticas são adotar vários métodos de unidades de eficiência de transferência de calor (E-NTU) .

The heat exchanger temperature depends on the process conditions. Although we hope to increase the heat transfer and heat transfer temperature and pressure intensity, the medium temperature is too high or too low. Scaling, precipitation and crystallization may occur, but the heat transfer is deteriorated. At the same time, the choice of medium temperature has an important influence on the choice of wall materials and thermal compensation Requisitos . Não vale a pena buscar alta eficiência e economia .

The hot end temperature is not less than 20°C, the cold end temperature difference is not less than 5°C, the initial temperature of the cooler or condenser of the coolant should be higher than the freezing point of the liquid to be cooled, the condensation of non-condensable gas, the final temperature of the coolant is 5°C lower than the dew point temperature of the condensing gas, and the air outlet and inlet of the hot fluid should be no less than 20 ° C Temperatura de resfriamento do ar . Esses indicadores podem ser calculados por tecnologia e economia . É claro que esses indicadores devem ser considerados de forma abrangente de acordo com diferentes ocasiões e fins .

The evaluation of Teflon heat exchangers should be based on technical and economic analysis, comprehensive consideration, such as technology, economy, safety, manufacturing, installation, operation and maintenance and material requirements, especially the improvement projects of energy-saving heat exchangers should pay attention to the heat transfer coefficient K under the same pressure conditions, the heat exchanger efficiency, equipment investment, operating costs and other technical and economic indicators, on a comparable basis, such evaluation has a general guiding Significado .