Modifikasi Sirip (Fin) Spiral Pada Inner Pipe Dari Double Pipe Ground Heat Exchanger Untuk Meningkatkan Kapasitas Perpindahan Panas Dan Menurunkan Pressure Drop

Abstract

In countries with subtropical climates, they need warmers in winter, therefore technology is needed to meet this. One of them is Ground Heat Exchanger, this tool is a heat exchanger by utilizing heat from the ground as a heating medium. This tool uses a coxial-double pipe system which consists of two pipes. More efficient performance improvements are needed. The study was conducted to increase the rate of heat transfer by adding a spiral fin without any increase in pressure drop. ANSYS Fluent software is used to simulate. Three spiral fin models were made with a pitch measuring 0.15 m perforated with variations in holes including n = 2, n = 3, and cross. Of the three variations of the model n = 2, it has a heat transfer value of 76.6034 W and a pressure drop value of 152.82 Pa. Model n = 3, has a heat transfer value of 71.3118 W and a pressure drop value of 150.31 Pa. The cross model has a heat transfer value of 105,834 W and a pressure drop value of 182,923 Pa. From the result, the ideal design model is n=2.