ENERGY ANALYSIS AND DESIGN OF HVAC SYSTEM USING BIM

Abstract

Over the past decade, there is substantial growth in the building’s energy consumption. This has drawn attention to the contradiction between high energy use and low energy efficiency in the construction industry. The HVAC system accounts for the major energy consumption in the buildings. Therefore, it’s important to examine and assess energy-conserving solutions for HVAC systems. The total cooling and heating load of the building is determined by various factors such as its location, orientation, heat gain through walls, window glass, roofs, people, lighting, electrical appliances, and ventilation infiltration rate. It is necessary to consider energy analysis and optimization in the conceptual design phase of a project. Starting energy analysis during this phase is the most effective as it is the most flexible stage of the design, allowing for numerous adjustments while saving the most energy. Earlier energy analysis used to take a long time, but with Building Information Modeling (BIM), it can now be done rapidly. The BIM model can be directly used for analysis of energy with Energy analysis tools (Autodesk Insight), eliminating the complex computations. BIM provides a complete solution for system analysis and design. The central theme of this research is a commercial school building project in Karnataka, India. This research proposes a BIM-based energy analysis using Insight, heating and cooling load analysis, and its variation with different thermal properties (U-value) as well as creating the 3D HVAC design Model in Autodesk Revit.