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2026 Vol.46, Issue 3 Preview Page
Evaluation of Multi-Zone DCV System in a Residential Building Under Occupancy Scenarios

공동주택 재실 시나리오에 따른 각실제어 DCV 시스템 평가

Hanung Jeong1
,
Kyungmo Kang2*
정 한웅1
,
강 경모2*
1Master’s Course, Department of Architectural Engineering, Daejin University
2Assistant Professor, Department of Architectural Engineering, Daejin University
1대진대학교 건축공학과, 석사과정
2대진대학교 건축공학과, 조교수
*Corresponding Author
30 June 2026. pp. 89-98
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Abstract

The construction of zero-energy buildings (ZEB) is a key strategy for achieving Korea’s 2050 carbon neutrality goal. Heat recovery ventilators (HRVs) play a critical role in ZEB by supplying outdoor air with minimal energy loss. However, conventional HRVs operate at a constant air volume (CAV) regardless of occupancy, which often results in over-ventilation in unoccupied rooms and insufficient ventilation in occupied rooms. This study applied a CO2-based multi-zone demand-controlled ventilation (DCV) system to a full-scale residential test bed to address this limitation. The DCV system independently controlled the airflow to each room using motorized dampers based on the measured CO2 concentration. Three occupant scenarios were tested and compared with a CAV reference set at the legal minimum ventilation rate of 0.5 ACH. The DCV system maintained indoor CO2 concentrations below 1,500 ppm in all scenarios. In bedroom-centered scenarios (Cases 1 and 2), the DCV consumed fan power comparable to that of CAV while distributing airflow according to room-specific demand. In the living-room-centered scenario (Case 3), the DCV reduced fan power consumption by approximately 37% compared to CAV while maintaining an acceptable indoor air quality. These results indicate that CO2-based multi-zone DCV is an effective ventilation strategy for residential buildings, where the occupant distribution varies throughout the day.

Keywords
Energy Saving
Indoor Air Quality
Zero Energy Building
Heat Recovery Ventilator
키워드
에너지절감
실내공기질
제로에너지건축
열회수형 환기설비
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Information
  • Publisher :Korean Solar Energy Society
  • Publisher(Ko) :한국태양에너지학회
  • Journal Title :Journal of the Korean Solar Energy Society
  • Journal Title(Ko) :한국태양에너지학회 논문집
  • Volume : 46
  • No :3
  • Pages :89-98
  • Received Date : 2026-04-06
  • Revised Date : 2026-05-04
  • Accepted Date : 2026-05-08
  • DOI :https://doi.org/10.7836/kses.2026.46.3.089
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