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

Author

Listed:
  • 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)

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.

Suggested Citation

  • Hyomun Lee & Kyungwoo Lee & Eunho Kang & Dongsu Kim & Myunghwan Oh & Jongho Yoon, 2023. "Evaluation of Heated Window System to Enhance Indoor Thermal Comfort and Reduce Heating Demands Based on Simulation Analysis in South Korea," Energies, MDPI, vol. 16(3), pages 1-22, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1481-:d:1055796
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    References listed on IDEAS

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    1. Ruda Lee & Eunho Kang & Hyomun Lee & Jongho Yoon, 2022. "Heat Flux and Thermal Characteristics of Electrically Heated Windows: A Case Study," Sustainability, MDPI, vol. 14(1), pages 1-16, January.
    2. Ihm, Pyeongchan & Park, Lyool & Krarti, Moncef & Seo, Donghyun, 2012. "Impact of window selection on the energy performance of residential buildings in South Korea," Energy Policy, Elsevier, vol. 44(C), pages 1-9.
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