Pengukuran Laju Pelepasan Kalor pada Tangki SWH dengan Pipa Berisi Campuran Paraffin Wax dan Serbuk Tembaga 10% Berat

Abstract

In conventional SWH (Solar Water Heater), water is used as a heat storage medium in the tank. Water has a large density, so the construction will be heavy and requires reinforcement on the roof frame. Paraffin wax is a type of phase change material (PCM) with a low density so that it is light and has a large energy density to accommodate large amounts of energy for a small volume. However, paraffin wax has low thermal conductivity, so it is necessary to add Cu powder to increase its thermal conductivity. In this study, a mixture of paraffin wax and 10% Cu powder was used. This study aimed to determine the rate of heat release of water and of the PCM mixture. This study uses four water discharge variations, namely 1; 1.5; 2; and 2.5 LPM. he temperature in the tank and the PCM temperature in the capsule in the tank. Rate of heat released is determined by calculating cumulative heat released by the water dan the mixture of PCM and the total time. The results showed that the greater the water discharge, the greater the rate of heat release. The largest water heat release rate was 790 J / s, while the heat release rate by a mixture of PCM and Cu powder was 101.44 J / s. From these results, further research is needed with a larger percentage of Cu powder.