Simulation Schedule

Lighting / device	Occupant
cooperate	cooperate
Non-air conditioning	Non-air conditioning

Cases were selected as shown in

to evaluate the annual energy reduction rate considering the climatic conditions, glass performance, and window area ratio according to the area of the target MDU. The window type and glass performance were analyzed for changes in energy reduction rate considering the energy-saving design criteria of buildings.

The window area ratio was divided into 30 to 70% and 10%, and classified into a total of 5 cases. The types of windows and glass were selected based on the double-glazed windows and triple-glazed windows most commonly applied to apartments.

The total window, Roy glass, and argon-infused Roy glass were classified into six cases. Considering the thickness of the air layer applied to the double-glazed windows and triple-glazed windows, the three cases were divided into 6mm, 12mm, and 16mm, and the solar heat gain coefficient (SHGC), an indicator of solar radiation performance, was 0.2 to 0.8, 0.2. Each case was divided into 4 categories.

shows the simulation glass type of the structure to be analyzed.

Case selection by window and glass performance

Air layer	Glass Type 1	Glass Type 2	Window area ratio	SHGC
6mm 12mm 16mm	Triple window	General window Roy Glass Argon + Roy Glass	30% 40% 50% 60% 70%	0.2 0.4 0.6 0.8

Comparison of energy consumption according to glass performance (50% of window area ratio, Seoul)

	A double-glazed window	triple window
Ordinary glass
Low-e
Low-e + argon