NUMERICAL SIMULATION OF APPLICATION UNDERGROUND HEAT EXCHANGER AS SIMPLE HOUSE AIR CONDITIONING SYSTEM IN BANDUNG

• Main Author: Yhoga Nugraha, Muhamad
• Format: Final Project
• Language: Indonesia
• Subjects: Arsitektur lanskap
• Online Access: https://digilib.itb.ac.id/gdl/view/52122
• Institution: Institut Teknologi Bandung

Building air conditioning systems use forty percent of global energy consumption. The use of refrigerants also has an adverse effect on the environment, such as ozone layer depletion and global warming. Underground heat exchanger is one solution to solve this problem. This system utilizes the soil as a heatsink which tends to be at constant temperature throughout the year. This research is still not widely conducted in Indonesia. Therefore, the application of an underground heat exchanger in a simple house is studied in this study. Underground heat exchanger designed for house type 36 in Bandung. This system model is simulated using a numerical simulation program with the finite volume method. The temperature profile, heat and the effect of design parameters on system performance were studied in this study. The results of this study are an optimum underground heat exchanger design and a comparison of the performance of this system with a split AC system. Based on the selected design parameters, the underground heat exchanger has a volume of and a total surface area of contact is . The cooling capacity obtained is depending on soil conditions. Increasing the pipe diameter and flow velocity will reduce the average temperature difference by and while the increase in thickness and soil depth increases the average temperature difference by and , respectively. The pipe surface distance is recommended to be greater than . This system has met the SNI comfortable air temperature standards and ASHRAE ventilation airflow standards but can only meet of the house cooling load. This system has 75.8% lower energy consumption and higher COP than a split AC system.