چكيده به لاتين
Compact heat exchangers are widely used in air cooling, chemical engineering and aerospace applications due to their high compression and efficiency. The uniform distribution of single-phase and two-phase currents in high-plate heat exchangers, which are a type of compact heat exchanger, and the relationship between the characteristics of non-uniform fluid flow and heat exchanger loss efficiency are examined in this study. Examination of the results shows that non-uniform flow distribution can be considered as a serious problem in high-plate plate heat exchangers. The non-uniform distribution of two-phase currents in high-plate plate heat exchangers is greater than single-phase currents. non-uniform distribution has been shown to significantly reduce heat transfer performance. It has also been shown that non-uniform distribution leads to a significant reduction in heat transfer performance. The results show that Considering the effects of non-uniform fluid distribution can make up to 8% difference in pressure drop compared to uniform distribution mode. The effect of gravity, changes in pressure drop and heat transfer in non-uniform distribution conditions were investigated and It was found that with increasing the temperature of the outer fluid (air), the amount of heat transfer decreases and also with increasing the temperature of the refrigerant entering the system, the amount of thermal efficiency or heat exchange increases. Also, the effects of different conditions for the number of pipes in the passages, the optimal states for the maximum and minimum values related to heat transfer rate, pressure drop and the quality of the outlet refrigerant have been investigated and evaluated.
