The shielding coefficient (SC) indicates the degree to which heat energy generated from solar radiation is transmitted to the inside through the glass. It is expressed as a value of 1.0 to 0.0. If 1.0, it means that the solar heat is completely transmitted, and if 0.0, it means that the solar heat is completely blocked.

Since the shielding coefficient cannot represent radiant heat transmitted to a room generated by solar energy, it has recently been replaced by using a solar heat acquisition coefficient.

3. Annual energy simulation overview
3.1 Design Builder overview
Currently, maintenance costs are considered to be more important than building initial costs, that is, sustainability of buildings is considered as an important part. Therefore, this study used Degisn Builder v4.7, one of the energy evaluation tools.

The Design Builder program combines the advantages of DOE-2.1, Blast, or esp-r, the representative analysis program of the hourly dynamic energy analysis program, making it one of the most advanced third-party programs of the EnergyPlus program being developed in the United States. 5)

Design Builder is a tool for measuring the comfort and energy of buildings developed by Design Builder in the UK. It is linked with EnergyPlus and SBEM to use energy consumption of buildings, the interpretation of various environmentally friendly building elements such as lighting and facility equipment performance, is provided as numerical and visual data. In the air conditioning section, the compact HVAC provided by Degisn Builder makes it easy to apply to general cooling and heating systems, and you can set the system you want through direct modeling of the facility system. Through this, the total energy consumption calculated can be viewed as a result of annual, monthly, daily, and hourly. In addition to the elements and templates provided by Degisn Builder itself, there is an advantage that you can import the materials you need through the library. In addition, the UK's eco-friendly building certification system (BREEAM) provides credibility to builders as a certified building energy analysis tool.6)

In this study, the Design Builder simulation program

DesignBuilder v4.7
3.2 Overview of buildings to be analyzed
The target building was selected based on the 84 ㎡ apartment house, which is the size of the national housing. This apartment house is a 29-story south-facing tower-type building with 4 generations. is the outline of the target MDU, and

is the target model and shows the floor plan of the base layer of the MDU.

 

 

5) Jong-Ho Yoon, Byeong-Soo Kim, Evaluation of Thermal Performance of Movable Insulation Systems Installed in Balcony Windows of Apartment Houses, Korea Solar Energy Society 2008

6) Seung-jun Seung, Byeong-chan Lim, Evaluation of Optimal Design Factors for Standard Models of Rural Housing Considering Building Energy Savings and Economics, 2016

Floor Plan of Building for Analysis

Building Overview

division	Contents
Unit household area	84㎡
Height	2.8m (based on standard floor)
Floor	29th floor
defense	Forward