صبا خيامي

Abstract: Museums are buildings where natural lighting is very important in them, and their energy consumption is very high due to exhibition. The main issue of this research is to provide technological solutions for optimal integration of structure, energy and natural lighting in museums' design. In this project, digital simulation is used and various factors effect on optimizing the building's lighting and energy efficiency is investigated in a reciprocating process by grasshopper Plugin and Honeybee and Ladybug extensions. In this research and design, solutions were adopted in which are both light and energy efficient. The use of atrium and its integration with earth sheltering and double skin façade system with dynamic shaders are approaches that have been analyzed in this study. The effect of earth sheltering, the shape and proportions of the atrium, dynamic shaders, and its location, were analyzed separately and finally, the combination of these three solutions showed that atrium and earth sheltering, if used together, also had disadvantages Reducement and strengths reinforcement. For example, earth sheltering in an atrium-containing building reduces 20.52% of energy consumption, while in a earth sheltered non-atrium building, overall energy consumption does not improve and even increases by 12.92%, due to high lighting consumption, despite a decrease in cooling and heating consumption. In contrast, the use of atrium in a half earth sheltered building reduces 38.81% of the energy consumption, while in a non earth sheltered building, the consumption reduction is only 13.6%. In the Astan Quds Razavi Museum design, we have to resort earth sheltering in accordance with the design requirements, and the use of atrium was proposed as a way to provide lighting for underground floors. By comparing the final model, in which all three solutions were used with a non-atrium and non- dynamic shader earth sheltered model, we have 45% decrease in cooling, 34% decrease in heating, 74% decrease in lighting consumption and 51% decrease in overall energy consumption. It was observed during the last analysis if the atrium is located only on ground and underground floors, comparing the final model with a non-atrium and non-dynamic shader earth sheltered model, we have 65% reduction in cooling, 20% reduction in heating, 81% reduction in lighting consumption an‎d a 60% reduction in overall energy consumption. Keywords: lighting and energy efficiency Optimization in museums, earth sheltering, atrium, dynamic shaders