INTEGRATION OF PHASE CHANGE MATERIAL INTO BULDING WALL TO SAVE ENERGY OF AIR CONDITIONING SYSTEMS

• Main Author: Christantho Budiman, Alexander
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/38872
• Institution: Institut Teknologi Bandung

Air conditioning system is an important part of the building. The system produces thermal comfort for human activity. In relation to energy consumption, the system is expected to use electrical energy optimally. The use of phase change materials as a mixture for the building?s wall can help to achieve this goal by reducing the thermal load, i.e. by lowering and/or stabilizing the temperature inside the building. This research consists of two parts, experiments to measure a temperature on a building miniature and simulation of phase change phenomenon using FLUENT software. Experimental activities include microencapsulation of coconut oil as a phase change material, the identification of thermal characteristics of phase change microcapsules using Differential Scanning Calorimetry (DSC), mixing of a phase change material into cement brick, construction of building miniature, and temperature measurements at several measurement points. From simulation, it is expected to get the temperature contours in the walls of buildings which contain phase change material. The results of the DSC measurement shows the value of enthalpy of fusion by 81 kJ / kg with a peak temperature range of phase change process at 24-26oC. The brick?s size is 22 cm x 11 cm and 5.4 cm thick which consists of 44% cement and 40% microcapsules. From the test, the temperature of a brick with phase change material have lower temperatures and also more stable. Effect caused by the phase change appears to have started at 8:00 and end at around 12:00. Room with walls that contains approximately 5% (by mass) of phase change material has 1oC lower average temperature compared to the conventional wall.