Optimization of Thermal Comfort and Energy Consumption in Bangladesh Ready-Made Garment Factories: An Approach towards the Path to Net Zero Energy Buildings

Abstract

RMG workers in Bangladesh are facing scorching heat due to regional climatic conditions and increasing temperatures due to climate change. This research investigates the indoor thermal condition of a ready-made garment (RMG) factory and develops strategies to improve the comfort of workers. Energy optimization is carried out and design features are identified (e.g. window, shading and skylight configurations) that achieve the best energy performance. Eight simulation steps are also carried out to accomplish the process towards the path to net zero energy building (NZEB). Simulation analysis is carried out to measure energy use intensity (EUI) over the year for the base case building. By changing various features, a further seven steps of simulation are carried out to reduce the EUI value and turn it into zero energy building. The EUI value is gradually decreased at each step. The research shows that nearly 750,000 kWh energy can be saved per year in the case RMG factory. The incorporation of photovoltaic (PV) panels can harvest approximately 40,000 kWh over the year.