Building Technology Research Group

Bandung, Indonesia

Building Technology Research Group

Bandung, Indonesia
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Putri W.A.,Magnetic and Photonic Research Group | Fahmi Z.,Magnetic and Photonic Research Group | Sutjahja I.M.,Magnetic and Photonic Research Group | Kurnia D.,Magnetic and Photonic Research Group | Wonorahardjo S.,Building Technology Research Group
Journal of Physics: Conference Series | Year: 2016

The high consumption of electric energy for room air conditioning (AC) system in Indonesia has driven the research of potential thermal energy storage system as a passive temperature controller. The application of coconut oil (CO) as the potential candidate for this purpose has been motivated since its working temperature just around the human thermal comfort zone in the tropical area as Indonesia. In this research we report the time-dependent temperature data of CO, which is adopting the T-history method. The analysis of the data revealed a set of thermophysical parameters, consist of the mean specific heats of the solid and liquid, as well as the latent heat of fusion for the phase change transition. The performance of CO to decrease the air temperature was measured in the thermal chamber. From the results it is shown that the latent phase of CO related to the solid-liquid phase transition show the highest capability in heat absorption, directly showing the potential application of CO as thermal energy storage system in Indonesia.


Sri Rahayu A.U.,Magnetic and Photonic Research Group | Putri W.A.,Magnetic and Photonic Research Group | Sutjahja I.M.,Magnetic and Photonic Research Group | Kurnia D.,Magnetic and Photonic Research Group | Wonorahardjo S.,Building Technology Research Group
Journal of Physics: Conference Series | Year: 2016

A latent heat energy storage system utilizing phase change materials (PCM) is an alternative strategy to reduce the use of Air Conditioning (AC) system in big cities in Indonesia in order for energy conservation in the future. In this research we used two kinds of materials, namely organic PCM based on lauric acid from coconut oil (CO) and inorganic PCM based on salt hydrate CaCl2.6H2O, because they have thermophysical parameters suitable for human's thermal comfort application in the building. The CO which contained more than 50% lauric acid has the melting temperature (Tm ) of about 26 °C and heat entalphy (ΔH) around 103 kJ/kg, while CaCl2.6H2O has the melting point of 29 °C and heat entalphy of 190 kJ/kg. In this paper we report the effectiveness of those two kinds of PCM in reducing the air temperature as one of some criteria for human's thermal comfort. The experiments were performed in a close and adiabatic room and the time-temperature measurements were done automatically using Arduino microcontroller and LM35 temperature sensor connected to the PC.

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