مبدل های حرارتی لوله سه گانه
Abstract
1- Introduction
2- Triple tube exchanger advancements
3- Conclusions
References
Abstract
In the past decades have faced the challenges in meeting out the cooling demand due to the technological developments. More works are being carried out for optimum heat transfer in concentric heat exchangers, one among the double tube heat exchangers investigation is the triple tube heat exchangers (TTHE). Reported that the triple tube heat exchangers are more effective than double tube heat exchangers. In this paper, investigations carried out on triple tube heat exchangers are reviewed and the reports published by different researchers are critically analyzed in order to carry out the advanced research work on triple tube heat exchangers.
Introduction
The basic type of heat exchanger used in a wide range of applications is a double tube heat exchanger. Its working phenomenon is based on heat transfer between two pipes with cold and hot fluids. It has its significance in freezing, boiling drying, dairy, and pharmaceutical, food, pasteurization and chemical industries. In order to manage high-temperature differences, the heat exchange area should be increased, which could be possible only by increasing the heat exchanger’s length. TTHE solves this problem, by increasing the heat transfer area for the same length of the double tube heat exchanger. It has three concentric tubes specifically three compartments which are mentioned to be inner tube, inner annulus and outer annulus. It is needed to flow the target fluid whose temperature variations are of main concern for application fulfillment within the inner annulus for taking better advantage of the heat exchanger. The inner annulus has 2 heat exchange surfaces (inner tube outer surface and outer tube inner surface) that will increase the heat exchange area of heat exchanger marginally compared to double tube device (has just one heat exchange surface) which will increase the speed of heat exchange. It conjointly in terms will increase the potency of heat exchanger.