STUDI PERFORMANSI ECONOMIZER JENIS ALIRAN SILANG UNTUK PROSES DEGREASING DI PT. X PLANT KARAWANG

Bina Teknika Pub Date : 2018-12-17 DOI:10.54378/bt.v14i2.334
K. Komarudin, Reza Rahmaputra
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Abstract

Economizer is Heat Exchanger with Crossflow type that have function as reheater the  water to degreasing process. System of Economizer had operated continuously for 7 years. So from this condition Effectiveness and Temperature possibility Can’t achieve the Requirement. Degreasing Process is a part of Painting process in Vehicle manufacturing that have function to degrease the oil, dust and etc.  A decrease in the effectiveness of this, we need recalculation and compare  with design condition to get better effectiveness. Analysis will be refer to fluid flow, overall heat transfer coefficient (U), and Efffectiveness of Economizer it self. Based on result of Calculation and Experiment, the flow of fluid is turbulent flow with Reynold number 12002.14 (Max Condition). Overall heat transfer coefficient (U) is 16.18 W/mK, while the design condition is 48 W/m.K also for Effectiveness is 32.16% and the design condition is 50% . This calculation Proved decreasing of that the performance of economizer. It is caused by scaling of the inner pipe with ratio 2.26%. Scaling will be reduce thermal conductivity of the pipe and also gradient of Temperature.
省煤器为横流式换热器,具有将水再加热至脱脂过程的作用。省煤器系统已连续运行7年。因此在这种情况下,效能和温度的可能性都不能达到要求。脱脂工艺是汽车涂装工艺的一部分,具有除油、除尘等作用。这种方法的有效性降低,需要重新计算并与设计条件进行比较,以获得更好的有效性。分析将参考流体流量、总传热系数(U)和省煤器本身的有效性。根据计算和实验结果,流体的流动为湍流,雷诺数为12002.14(最大条件)。总换热系数(U)为16.18 W/mK,设计工况为48 W/m。有效性K为32.16%,设计条件为50%。经计算证明,省煤器的性能有所下降。其原因是内管结垢,结垢率为2.26%。结垢会降低管材的导热系数,降低管材的温度梯度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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