PERFORMANCE ANALYSIS AND OPTIMIZATION OF GEOMETRIC PARAMETERS OF VERTICAL ABSORBER WALL SOLAR CHIMNEY AS NATURAL VENTILATION SYSTEM IN RESIDENTIAL BUILDINGS IN BANDUNG CITY

• Main Author: Naufal Akbar, Dzaky
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/77174
• Institution: Institut Teknologi Bandung

A solar chimney is a renewable energy system to facilitate natural ventilation in a building. The geometric parameters of the chimney are known to affect the performance of the solar chimney significantly. This study aims to analyze the impact of the glazing wall's inclination angle (?glaz), the width of the air gap's base (Wg), and the height of the chimney’s inlet (Hin) on the ventilation rate of the solar chimney and determine the optimal combination of these three parameters and evaluate the performance based on ASHRAE Standards. The research was conducted through a computational simulation of the air inside a house with a solar chimney in Bandung city. The simulation's boundary conditions included the heat flux on the side adjacent to the absorber wall and the ambient temperature at the chimney's inlet and outlet, based on environmental data from Bandung City on June 5, 2021. Based on the simulations, the optimum value was found for parameter ?glaz and Wg, while Hin was directly proportional to the ventilation rate with a declining increase rate. Further analysis shows that the width of the chimney’s outlet (We) has a dominant influence on the ventilation rate. Based on the analysis, a design with ?glaz = 10o, Wg = 750 mm, and Hin = 480 mm was found as the optimum design. The design succeeded in meeting the minimum ventilation rate standard throughout its working range but failed to meet the standard for ideal thermal comfort conditions in the time range from 10.00 AM to 02.00 PM local time.