Evaluation of Heated Window System to Enhance Indoor Thermal Comfort and Reduce Heating Demands Based on Simulation Analysis in South Korea

Hyomun Lee, Kyungwoo Lee, Eunho Kang, Dongsu Kim, Myunghwan Oh and Jongho Yoon ()
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Hyomun Lee: Department of Architectural Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
Kyungwoo Lee: Sustainable Design Team of R & D Center, Junglim Architecture, Seoul 04526, Republic of Korea
Eunho Kang: Department of Architectural Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
Dongsu Kim: Department of Architectural Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
Myunghwan Oh: Center for Climatic Environment Real-Scale Testing, Energy Division, Korea Conformity Laboratories, Seosan 31900, Republic of Korea
Jongho Yoon: Department of Architectural Engineering, Hanbat National University, Daejeon 34158, Republic of Korea

Energies, 2023, vol. 16, issue 3, 1-22

Abstract: Heated glass can be applied to improve windows’ condensation resistance and indoor thermal comfort in buildings. Although this applied technology has advantages, there are still some concerns in practical applications, such as additional energy consumption and control issues. This study evaluates the effectiveness of a heated window heating (HWH) system in terms of thermal comfort and heating energy performance (HEP). The simulation-based analysis is performed to evaluate the effectiveness of the HWH using a residential building model and to compare it with radiant floor heating (RFH) and hybrid heating (HH) systems (i.e., combined HWH and RFH). This study also investigates the peak and cumulative heating loads using HWH systems with various scenarios of control methods and setpoint temperature. The predicted mean vote (PMV) is used as an indoor thermal comfort index. The ratio of cumulative thermal comfort time to the entire heating period is calculated. The results show that HWH and HH can reduce the heating load by up to 65.60% and 50.95%, respectively, compared to RFH. In addition, the times of thermal comfort can be increased by 12.55% and 6.98% with HWH and HH, respectively. However, considering the social practices of South Korea, HH is more suitable than HWH. Further investigations for HH show that a surface setpoint of 26 °C is proper, considering both heating demands and thermal comfort. In addition, the setpoint temperature should be determined considering HEP and the thermal comfort for HWH, and the optimal setpoint temperature was suggested under specific conditions.

Keywords: heated window heating; radiant floor heating; thermal comfort; predicted mean vote; control method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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