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Dual water coil 데시칸트제습 시스템 및 천장복사냉방 패널의 디커플링 시스템 제안
장휴산(Hyu San Jang),유석(Shuo Liu),설염(Yan Xue),이태하(Tae Ha Leigh),정창호(Chang Ho Jeong),권영상(Young Sang Kwon),여명석(Myoung Souk Yeo) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
The purpose of this paper is to introduce a method of capacity estimation and control of decoupling systems for combination systems of a desiccant system and radiant ceiling cooling panels. EnergyPlus 9.4 was used as the simulation tool and the analysis target and analysis period were set as the living room of the apartment from August 1 to August 31. As a result of applying decoupling system operation using desiccant system and radiant ceiling panel, the decoupling operation was achieved by maintaining the supply air temperature of almost 26℃. In addition, the condensation generation of each cooling system could be prevented through high temperature cooling operation, as well as satisfying the room comfort levels, especially PMVs were mostly between -0.2 and 0. In the future, we also plan to model heat source systems (primary systems) and try to reduce energy by combining them with renewable energy.
천장복사패널 결합형 냉수 타입 데시칸트 냉방 시스템의 성능 평가
장휴산(Hyu San Jang),유석(Shuo Liu),여명석(Myoung Souk Yeo) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
This paper aims to verify the effectiveness of decoupling control of RCP with DCS while controlling condensed water of chilled water coil, and to improve the performance of the RCP system, which verified the applicability of the combined system with DCS through test bed experiments. The indoor temperature and relative humidity were satisfied while suppressing the generation of condensed water in RCP with DCS through the decoupling control. The moisture removal capacity was consistently 5 g/kg(DA), and the DCOP was between 0.2 and 0.4. Since the supply chilled water temperatures of CC1, 2 and RCP are mostly above 14°C, this will be higher than the chilled water temperature of the general air handling units, which will increase the utilization of natural heat sources in the future.
비교실험을 통한 바닥 복사 난방 시스템의 외기보상제어 적용성 평가
장휴산(Hyu San Jang),유석(Shuo Liu),설염(Yan Xue),여명석(Myoung Souk Yeo) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
The purpose of this study is to confirm the effectiveness of outdoor reset temperature control to reduce overshooting of indoor temperature and maintain a stable indoor environment. Experiments were conducted by comparison between a system applying outdoor reset temperature control and one applying a constant hot water temperature(simulation of district heating). In the results, although the former decreased energy consumption and increased the comfortable period, the pick-up load time also increased. Additionally, in the case of a lower reset line, the comfort period increased whereas the pick-up load time also increased.
시뮬레이션을 통한 외기보상제어 기반 공동주택 바닥복사난방 실별 제어의 적용성 연구
설염(Yan Xue),장휴산(Hyu San Jang),유석(Shuo Liu),이태하(Tae Ha Leight),정창호(Chang Ho Jeong),여명석(Myoung Souk Yeo) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
As a high-efficiency and energy-saving heating method, district heating has attracted more and more people’s attention. However, when planning or operating the heating system, people always design based on experience without considering the actual heating load of the residential building. If this happens, many rooms will overheat due to excessive heat supply, resulting in a waste of energy. In order to reduce the energy waste caused by such situation, this paper simulates and compares the direct use of the water from the secondary side of the district heating as supply water to indoor heating equipment and the installation of a heat exchanger before entering the indoor heating equipment to obtain low-temperature water as supply water. The simulation results show that both control methods can control the indoor temperature well. And the second method saves 7% of energy consumption compared with the first method.
이신혜(Shin Hye Lee),장휴산(Hyu San Jang),주은지(Eun Ji Ju),김희강(Hee Gang Kim),강동화(Dong Hwa Kang),임동현(Dong Hyun Rim),여명석(Myoung Souk Yeo) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11
The purpose of this study is to analyze the effect of outdoor particulate matter(PM) on indoors in recent high-rise residential housing unit in Korea by estimation and comparison of penetration coefficient and deposition rate. The experiment was based on natural decay test and was conducted by measuring the particulate matters after generating dusts. Penetration coefficient and deposition rate were estimated using lumped indoor particle model based on the mass conservation, and compared with the result obtained by excluding the effect of infiltration of outdoor particle. There was no significant difference in the deposition rate when the particle infiltration and penetration effect was excluded. The result suggests that recent Korean residential housing is tight and are less susceptible to external fine particle when there are no significantly high concentration of outdoor particles.
PVT를 활용한 천장복사냉방 패널 결합형 냉수 코일 하이브리드 데시칸트 시스템의 적용성
황은정(Eun Jung Whang),장휴산(Hyu San Jang),유석(Shuo Liu),이태하(Tae Ha Leigh),여명석(Myoung Souk Yeo) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
사용 온도가 높을수록 발전 효율이 감소하는 기존 PV 시스템의 문제를 해결하기 위해 개발된 PVT 시스템은 그 특성상 건물 내 적용이 어렵다. 국내 사례 중 하이브리드 데시칸트 냉방시스템 재생부에 태양열원을 활용한 연구가 있으나, 적정 공급 온도와 수요 온도 사이에 격차가 발생한다. 따라서 본 연구에서는 천장복사냉방 패널 결합형 냉수코일 하이브리드 데시칸트 시스템의 재생부에 PVT를 적용하고, 재생코일 온도(45℃, 50℃, 55℃)에 따른 실내 열쾌적, 발전량, 제습량 및 시스템 작동 시간을 분석하였다. 시뮬레이션 결과 발전량 측면에서는 재생코일 온도가 낮을수록, 제습량 및 시스템 작동 시간의 측면에서는 재생코일의 온도가 높을수록 전기에너지 생산 및 절감에 유리함을 확인하였다.