International Journal of Sustainable Building Technology and Urban Development ISSN:2093-761X(Print) 2093-7628(Online)

As a representative energy simulation tool in South Korea, ECO2 provides monthly energy consumption data such as heating, cooling, lighting, DHW, and ventilation. To analyze building energy use more accurately, it requires additional information such as density, specific heat, and so on. Regarding this matter, the present study aims to investigate an impact on thermal and energy performance by varying the values of density and specific heat of building materials. For this analysis, a 3rd-floor office building was chosen, which was a reference building from EnergyPlus. By using the EnergyPlus, indoor temperature, and heating and cooling load in the perimeter zone facing the South façade were analyzed by varying the values of density and specific heat of building materials. When varying the values of the density, the indoor temperatures were highly influenced by the outdoor climates and these were decreased as with the decrease in the value of the density. In addition, both heating and cooling loads were highly demanded as the values of the density and specific heat were decreased. Finally, a better understanding of the density and specific heat of building materials through the present study can make building stakeholders to find out the building energy demand and the indoor air temperature distribution more accurately and quantitatively.