TY - JOUR ID - 72779 TI - Experimental Study of Heat Transfer Rate in a Shell and Tube Heat Exchanger with Air Bubble Injection (TECHNICAL NOTE) JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - SINGH, GURPREET AU - NANDAN, ABHISHEK AD - Mechanical Engineering, Chandigarh University AD - Mechanical engineering Department, Chandigarh University Y1 - 2016 PY - 2016 VL - 29 IS - 8 SP - 1160 EP - 1166 KW - Shell and tube heat exchanger KW - heat transfer rate KW - Overall heat transfer rate KW - Dimensionless exergy loss DO - N2 - Shell and tube heat exchangers are widely being used in many of industrial and power engineering applications. Different techniques have been employed in order to enhance the performance of the heat exchanger. Air bubble injection is one method to increase the turbulence of the flowing fluids which in turn enhance the heat transfer performance. Injecting air bubbles is one of the promising techniques which does not require much complex systems. Air can be injected at different points. In this paper, analysis has been carried out for heat transfer performance and exergy analysis with different air injection points. Four different cases with and without air injection in shell or tube side have been taken into consideration and the results are compared. Through the study, it has been observed that injecting air bubbles throughout the tube enhances the heat transfer rate by 25-40% at different range of the Reynolds Number. The effect of air injection at different points also affects the overall heat transfer and the dimensionless exergy loss. UR - https://www.ije.ir/article_72779.html L1 - https://www.ije.ir/article_72779_0b2d9dac701e4875e81f8424476a48e7.pdf ER -