ZEMCH 2019 International Conference Proceedings April.2020 | Page 181
Exterior Window
South
North
WWR
East
South
Interior Light Density
Interior Equipment Density
People
Cooling
setpoint temperature
Months
Heating
setpoint temperature
Months
Intermediate
Spring (months)
periods
Fall (months)
Air conditioning schedule
HVAC system
3.36 W/m 2 K
47%
43%
38%
42%
5.17 W/m 2
7.79 W/m 2
0.11 person/m 2
26°C
June‐August
21°C
December‐February
March‐May
September‐November
Weekday, 9 AM – 5 PM
Ideal Air Load System
The infiltration rate was put as ACH 1.5 based on the previous study (Jeong et al.[8]) that presented
an office reference building in similar manners. The depth of the perimeter zone was set as 4.5 m. In
this study, the south perimeter zone of the middle floor including the south‐facing façade, which is the
main facing direction of the building, was anlayzed through simulation. The energy demand for the
zone was calculated through Ideal Air Load System with weather data of Seoul applied.
For EVB, specifications of the commercial product that is currently available in the market were
referred to[9]. EVB input data put in EnergyPlus are indicated in Table 2 [9].
Table 2. EVB input data [9]
Input data
Slat width
Slat separation
Slat thickness
Slat conductivity
Blind to glass distance
Value [m or W/mK]
0.05
0.04
0.001
221
2.8
Figure 1 describes an external venetian blind in EnergyPlus. As shown in the figure, the slat angle
is defined as the angle between the slat outward normal and the horizontal line. A slat angle of 0° sets
slats to be vertical, completely blocking the window, and an angle of 90° sets them to be horizontal.
Figure 1. Geometry description of External Venetian Blind in EnergyPlus.
Optimal Control of External Venetian Blinds Considering Energy Performance
170