A Comparison of Detailed and Simple Building Energy Analysis Tools for Eco–Friendly Office Building Design

The main objective of this study is to present low energy building and design process using building energy analysis tools, designing a practical office building. EnergyPlus and ECO2 were selected as primary and second tools. The peak heating and cooling load of the designed office building were simulated by EnergyPlus. And the peak load values were applied to ECO2 as HVAC and plant system's capacity. The second objective of this study is to investigate the tendency of simulation results by ECO2 using various input parameters, because ECO2 is a newly proposed energy rating tool for office building by KICT. The passive and active parameters were selected, such as U-factor, shading, orientation, system capacity, and so on. The primary energy usages were calculated by ECO2 and the results and their tendency were analyzed.