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수요기반 환기량 조절법(DCV)의 다중이용시설 적용방안
정재원(Jeong Jae-Weon),노상태(No Sang-Tae) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-
The objective of this paper was to show the possibility of demand-controlled ventilation (DCV) using the current Korean ventilation standard for multi-purposed facilites. Two attractive DCV approaches; CO₂-DCV and RFID-DCV were applied to DCV simulations for a theoretical public assembly space served by a dedicated outdoor air system (DOAS) with enthalpy recovery device. A numerical model for predicting realtime occupant number, ventilation rate, and CO₂ concentration under given conditions was developed using a commercial equation solver program. It was found that the current ventilation standard causes unstable ventilation system control in DCV applications, especially under CO₂-DCV. It is because the ventilation rate (per person) used in Korea is the sum of the outdoor air required to remove or dilute air contaminants generated by both occupant and building itself, and not a pure function of occupant numbers. Finally. it makes DCV control unstable when ventilation flow is regulated only by the number of occupants. In order for solving this problem, current Korean ventilation standard was modified as a form of ASHRAE Standard 62.1-2007 showing good applicability to various DCV approaches. It was found that this modification enhances applicability of the current ventilation standard to DCV significantly.
외기전담시스템 기반 초고층 공동주택 중앙 공급식 환기시스템의 적정 급기조건 설정 및 에너지 절감효과 분석
정재원(Jeong Jae-Weon),김민휘(Kim Min-Hwi),김유신(Kim Yu-Sin),김진효(Kim Jin-Hyo),권오현(Kwon Oh-Hyun) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.6
The main thrust of this paper is to investigate optimized supply air conditions and energy saving potentials of a dedicated outdoor air system (DOAS) applied to a highrise apartment building. As for a typical 132-m2 apartment unit, it was assumed that two different systems; centralized DOAS-Ceiling Radiant Cooling Panel and decentralized Energy Recovery Ventilator-Packaged Air Conditioner were installed. Transient behavior and control characteristics of each system were modeled numerically using a commercial equation solver program, and annual cooling coil load and heating load reduction potentials were compared. It was found in this research that DOAS-Ceiling Radiant Cooling Panel system can reduce the cooling coil load over 21% annually compared with the current Energy Recovery Ventilator-Packaged Air Conditioner pair. In addition, over 40% of annual ventilation heating load can be reduced by use of DOAS when the enthalpy wheel and the sensible wheel of the DOAS unit operate simultaneously. It was also found that the optimized dew point temperature of the DOAS supply air accommodating total latent load of a space is 11-12℃.
열전소자 기반 에너지 하베스팅 블록의 배열에 따른 발전량 분석
정재원(Jae-Won Joung),강용권(Yong-Kwon Kang),김민성(Min-seong Kim),권택돈(Taek-Don Kwon),정재원(Jae-Weon Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
The purpose of this study is to analyze the amount of power generation according to the arrangement of energy harvesting blocks installed instead of building exterior walls. The energy harvesting block is an energy recovery system that combines a thermoelectric generator and phase change material. The thermoelectric generator can generate the power from the waste heat of the building exterior wall by the Seebeck effect. Phase change materials store waste heat of the exterior wall of the building during the day and radiant heat is performed at night. To predict the amount of power generation, an experiment was conducted with the average building exterior wall surface temperature profile in November. A Peltier plate was attached to the energy harvesting block and used to establish the exterior wall surface temperature profile. As a result, the maximum power was 0.119W, which was the largest in the parallel arrangement, It is also indicated that the total amount of electricity generated per day, the parallel arrangement generated the largest amount of power at 0.535Wh/day.
정재원(Jae-Weon Jeong),임한솔(Hansol Lim) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
Until recently, almost all residential buildings in South Korea conducted the natural ventilation based on the difference of pressure and air density between indoor and outdoor. However it has been difficult to supply the ventilation requirement by natural ventilation method with the emergence of high-rise apartment buildings. Moreover the rapid development of thermal insulation for the energy conservation performance improved the airtightness of the buildings. It occurs the deficiency of fresh air and aggravates the indoor air pollution problem. The sick building syndrome is also caused by the shortage of ventilation in the building. Therefore, it is necessary to supply a sufficient amount of ventilation to main tain a healthy indoor air quality. In this study, ventilation standards and research trend for building in Korea and abroad were investigated according to the ventilation method.
현행 다중이용시설 환기량 기준의 수요기반 환기량 조절법(DCV)에 대한 적용성 평가
정재원(Jeong Jae-Weon),노상태(No Sang-Tae) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.3
The objective of this paper was to show the possibility of demand-controlled ventilation (DCV) using the current Korean ventilation standard for multi-purposed facilites. Two attractive DCV approaches; CO₂-DCV and RFID-DCV were applied to DCV simulations for a theoretical public assembly space served by a dedicated outdoor air system (DOAS) with enthalpy recovery device. A numerical model for predicting realtime occupant number, ventilation rate, CO₂and formaldehyde (HCHO) concentration under given conditions was developed using a commercial equation solver program. It was found that the current ventilation standard causes unstable ventilation system control in DCV applications, especially under CO₂-DCV. It is because the ventilation rate (per person) used in Korea is the sum of the outdoor air required to remove or dilute air contaminants generated by both occupant and building itself, and not a pure function of occupant numbers. Finally, it makes DCV control unstable when ventilation flow is regulated only by the number of occupants. In order for solving this problem, current Korean ventilation standard was modified as a form of ASHRAE Standard 62.1-2007 showing good applicability to various DCV approaches. It was found that this modification enhances applicability of the current ventilation standard to DCV significantly and can maintain acceptable HCHO concentration during the whole operating hours. Fan energy Reduction can also be expected from DCV operations.
열전소자 기반 에너지 하베스팅 블록의 배열에 따른 발전량 분석
정재원(Jae-Won Joung),강용권(Yong-Kwon Kang),김민성(Min-seong Kim),권택돈(Taek-Don Kwon),정재원(Jae-Weon Jeong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
The purpose of this study is to analyze the amount of power generation according to the arrangement of energy harvesting blocks installed instead of building exterior walls. The energy harvesting block is an energy recovery system that combines a thermoelectric generator and phase change material. The thermoelectric generator can generate the power from the waste heat of the building exterior wall by the Seebeck effect. Phase change materials store waste heat of the exterior wall of the building during the day and radiant heat is performed at night. To predict the amount of power generation, an experiment was conducted with the average building exterior wall surface temperature profile in November. A Peltier plate was attached to the energy harvesting block and used to establish the exterior wall surface temperature profile. As a result, the maximum power was 0.119W, which was the largest in the parallel arrangement, It is also indicated that the total amount of electricity generated per day, the parallel arrangement generated the largest amount of power at 0.535Wh/day.