THE IMPACT OF SECONDARY SKIN ON NATURAL LIGHTING IN THE OFFICE OF BPS SALATIGA: A SIMULATION STUDY USING DIALUX EVO 13.0 AND GREEN ARCHITECTURE PRINCIPLES

Abstract

The development of technology and the demand for sustainability encourage the
importance of applying green architecture principles in office buildings. The
implementation of green architecture principles in government office buildings often
encounters challenges such as limited stakeholder awareness, budget constraints, and
the absence of passive design strategies that optimize natural resources. These
conditions highlight the urgency of exploring design interventions that balance energy
efficiency, user comfort, and sustainability. This study aims to evaluate the
effectiveness of using secondary skin in improving daylighting in the Central Statistics
Agency (BPS) of Salatiga City. The approach used is a green architecture approach
with a focus on energy efficiency and the visual comfort of space users. The research
method includes analyzing the existing conditions and redesigning the facade using
secondary skin elements based on daylighting simulation through DIALux Evo, Revit,
and EDGE App software. Simulations were conducted on several main workspaces to
compare the value of light intensity between the existing conditions and the redesign
results. A comparative simulation between DIALux Evo 13.0 and Autodesk Revit
revealed consistent daylight distribution patterns, confirming the effectiveness of a
90° vertical secondary skin configuration. The EDGE Application 2.1.5 analysis
indicated potential energy savings of 55.32% in redesigned conditions, highlighting
the secondary skin's role in reducing artificial lighting dependency and contributing
to the overall building's energy efficiency. The results show that the application of
secondary skin can improve the even distribution of natural light and reduce
dependence on artificial lighting. In addition, the proposed redesign contributes to
achieving energy efficiency principles and improving workspace quality. This
research is expected to serve as a reference for the application of sustainable passive
design in government agency buildings in tropical areas.