Journal of Emerging Trends in Engineering and Applied Sciences: Research Areas

Abstract:
Shell and tube heat exchanger is widely used to heat removal and thermal energy transfer for system safety, operation stability and efficiency of turbomachinery system. In turbomachinery system, it is generally used to cool down of hot compressed gas located between stage and stage. The cooling system strongly desired to high efficiency which means low electrical power, compact, wide operation range, operation stability and system safety. It is considerable several ways to enhance heat transfer capability. At first balance, it may enhance heat transfer area by design optimization. It can be achieved by optimizing the design combination of heat exchanger. To obtain optimize design and reduce time and cost, when the initial concept design phase, it strongly required design of case study which means statically approach, significant design parameter and optimum design combination. In the present study, we found that the increase fin per unit length was most significant design parameter and the optimum design combination was founded by delta value from S/N ratio variation of design parameter. Moreover, the optimum shell and tube heat exchanger designed by using Taguch approach and L9 orthogonal array. We can obtained optimum design case only 9 cases study as 3 levels and 4 parameters. The optimum surface area enhanced by 51.8% with optimum design combination. Additionally, the pressure drop is decreased by 13.1% that compared to that of initial design.

Keywords: shell & tube heat exchanger; compressor; taguchi method; s/n ratio; heat transfer surface area; pressure drop; optimum design; TEMA; HTRI; minitab

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