TY - JOUR
T1 - Weather-based operation strategy for a dynamically compartmentalized double-skin façade system
AU - Yoon, Nari
AU - Heo, Yeonsook
N1 - Funding Information:
Compared with the discomfort hours in only the PC mode (Fig. 13), we observed a noticeable increase in hot discomfort in both the base and test cases. The graphs support the earlier studies by Refs. [9,45,50,51] that, in addition to the general overheating effect owing to the 100% glazing of the base case, the overheating effect owing to the DSF cavities can be significant. However, several adaptive measures involving retroactive control can resolve this issue without consuming additional cooling energy. This differs from the hot discomfort observed in the PC mode, for which active cooling should be used. First, increasing the airflow rate when hot discomfort occurs can be an easy fix to reduce the preheating effect [8]. Because our result is based on the minimum ventilation rate for only one occupant, a higher outdoor air intake will reduce the number of hot discomfort hours. Second, blinds can significantly reduce solar radiation intake and hot discomfort when combined with vent operation [49], or more advanced shadings such as a blind system with photovoltaic panels can be implemented [52]. Third, the mode can be switched from HH to PC when overheating occurs, requiring additional criteria for such operation. Finally, DSF with a phase-change material glass also helps to regulate such conditions [53]. A thorough examination of the controls of these mitigation strategies, together with DSF, is necessary for advanced operations; this is not in the scope of this study.This work was supported by the National Research Foundation of Korea grant, funded by the Ministry of Science and ICT of Korea (Grant No. 2020R1A5A1018153).
Funding Information:
This work was supported by the National Research Foundation of Korea grant, funded by the Ministry of Science and ICT of Korea (Grant No. 2020R1A5A1018153).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/12
Y1 - 2022/12
N2 - This study proposed a weather-based operation strategy for a dynamically compartmentalized double-skin façade (DSF) system. The system features two separate air cavities, each of which serves as an inlet or an outlet. The cavities are placed at different levels to facilitate the buoyancy-driven ventilation and the preheating effect. To enhance the performance, the compartmentalized DSF needs to be operated in active cooling (AC), passive cooling (PC), and hybrid heating (HH) modes based on the outdoor condition. Therefore, this study proposed the appropriate operation strategy for the system and evaluated the influence of the strategy on building's thermal performance. Various mode-control thresholds for switching between AC–PC and between PC–HH modes were examined. A validated building simulation model was used to evaluate the operation strategy through a case study, and the results were discussed on the basis of the two types of performance indicators (PIs): the cooling and heating energy use intensity (for AC and HH modes) and hot and cold discomfort hours (for PC and HH modes). A lower AC–PC threshold increases the cooling energy while decreasing the hot discomfort. The influence of a PC–HH threshold on discomfort hours is not linear and vary by modes; therefore, PIs in each mode should be prioritized to determine the optimal threshold. The case study indicated that the DSF with the proposed operation strategy saved 28% cooling energy and 98% heating energy in comparison to a single-skin façade system. Significant hot discomfort may occur in the HH mode, emphasizing the importance of adaptive operations.
AB - This study proposed a weather-based operation strategy for a dynamically compartmentalized double-skin façade (DSF) system. The system features two separate air cavities, each of which serves as an inlet or an outlet. The cavities are placed at different levels to facilitate the buoyancy-driven ventilation and the preheating effect. To enhance the performance, the compartmentalized DSF needs to be operated in active cooling (AC), passive cooling (PC), and hybrid heating (HH) modes based on the outdoor condition. Therefore, this study proposed the appropriate operation strategy for the system and evaluated the influence of the strategy on building's thermal performance. Various mode-control thresholds for switching between AC–PC and between PC–HH modes were examined. A validated building simulation model was used to evaluate the operation strategy through a case study, and the results were discussed on the basis of the two types of performance indicators (PIs): the cooling and heating energy use intensity (for AC and HH modes) and hot and cold discomfort hours (for PC and HH modes). A lower AC–PC threshold increases the cooling energy while decreasing the hot discomfort. The influence of a PC–HH threshold on discomfort hours is not linear and vary by modes; therefore, PIs in each mode should be prioritized to determine the optimal threshold. The case study indicated that the DSF with the proposed operation strategy saved 28% cooling energy and 98% heating energy in comparison to a single-skin façade system. Significant hot discomfort may occur in the HH mode, emphasizing the importance of adaptive operations.
KW - Compartmentalized double-skin façade
KW - Double-skin façade
KW - EMS
KW - Operation strategy
KW - Rule-based operation
UR - http://www.scopus.com/inward/record.url?scp=85141282058&partnerID=8YFLogxK
U2 - 10.1016/j.buildenv.2022.109755
DO - 10.1016/j.buildenv.2022.109755
M3 - Article
AN - SCOPUS:85141282058
SN - 0360-1323
VL - 226
JO - Building and Environment
JF - Building and Environment
M1 - 109755
ER -