공동주택에서의 전열교환 및 바닥매립 환기시스템 적용에 따른 에너지절약 성능평가

김종원,이정재 대한건축학회지회연합회 2017 대한건축학회연합논문집 Vol.19 No.3

본 연구에서는 전열교환 및 바닥매립 환기시스템의 적용시 냉·난방기 외기온 변화에 따른 실내 송풍온도를 도출하였다. 또한 도출된 결과를 이용하여 환기로 인해 손실되는 열량을 분석하였다. 본 연구의 결과를 정리하면 다음과 같다. 1) 전열교환 환기시스템의 실내 송풍온도는 냉방기에 평균 25.91℃, 난방기에 평균 17.50℃로 나타났다. 난방기 최저 외기온도 -15℃에서도 영상의 송풍온도를 나타냈다. 2) 바닥매립 환기시스템의 실내 송풍온도는 냉방기에 평균 25.08℃, 난방기에 평균 22.04℃로 나타났다. 3) 전열교환 환기시스템의 손실열량은 냉방기의 경우 -16.29~-35.69Wh, 난방기의 경우 53.19~117.83Wh로 나타났다. 제1종 환기방식 대비 평균 74.27% 에너지 절약적인 것으로 나타났다. 4) 바닥매립 환기시스템의 총 손실열량을 계산해 보면 냉방기 -46.33~-126.38Wh, 난방기 235.35~520.38Wh로 제1종 환기방식과 근소한 차이를 보이는 것으로 나타났다. 5) 전열교환 환기시스템과 바닥매립 환기시스템의 손실열량을 비교해보면 전열교환 환기시스템이 바닥매립 환기시스템 대비 평균 74.87% 에너지 절약적인 것으로 나타났다. 연구결과 환기시스템의 적용에 따른 냉·난방 에너지의 손실을 최소화하기 위해서는 전열교환 환기시스템의 적용이 적합한 것으로 나타났다. In this study, the indoor supplied temperature according to variation of outdoor temperature in cooling and heating seasons was drawn when the heat recovery system and the floor embedded ventilation system were applied. Besides, the heat loss due to ventilation was analyzed by using the drawn results. The results of the study can be summarized as follows. 1) The indoor supplied temperature of the heat recovery ventilation system was averagely to be 25.91℃ during the cooling season and 17.50℃ for a during the heating season. It showed the supplied temperature above zero even under the lowest outdoor temperature of -15℃. 2) The indoor supplied temperature of the floor embedded ventilation system was averagely to be 25.08℃ during the cooling season and 22.04℃ for a during the heating season. 3) The heat loss of the heat recovery ventilation system was found to be -16.29~-35.69Wh in case of a cooling season and 53.19~117.83Wh in case of a heating season. It was found that it could save the energy of 74.27% on average compared to the Type 1 ventilation system. 4) The heat loss of the floor embedded ventilation system were calculated, it was found to be -46.33~-126.38Wh for a cooling season and 235.35~520.38Wh for a heating season, which similar to the Type 1 ventilation system. 5) Compared the heat loss of the heat recovery ventilation system with that of the floor embedded ventilation system, it was found that the heat recovery ventilation system could save the energy of 74.87% on average compared to the floor embedded ventilation system. As a result of the study, it was shown that the application of the heat recovery ventilation system is appropriate in order to minimize the loss of energy for cooling and heating according to the application of a ventilation system.

결로방지를 위한 공용배기 활용 환기 시스템의 습도저감 성능 분석

이수인(Suin Lee),최경석(Gyeong-Seok Choi),이용준(Yong Jun Lee),이현화(Hyun-Hwa Lee) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.2

In order to prevent condensation, it is necessary to remove water vapor through ventilation. In this study, we proposed a hybrid ventilation system in which natural ventilation and cen-tralized exhaust fan (VCE) ventilation systems are linked, and then compared the air flow of the natural ventilation system and the VCE system using a Computational fluid dynamics (CFD) model. The possibility of condensation was analyzed according to the systems’ chang-es in temperature and relative humidity, and the temperature and the humidity of the ventila-tion systems were directly measured within apartment houses. The results revealed that the ventilation volume of the whole household measured at 0.15 ACH when the natural ventila-tion was applied, and 0.50 ACH when the VCE system was applied. The average indoor air temperature only decreased by 1℃ when VCE was applied, indicating a very slight differ-ence when compared to the natural ventilation system. In addition, the result of analyzing the relative humidity distribution shows that the local relative humidity exceeded 100%, and that condensation conditions were formed when the natural ventilation system was applied. How-ever, the relative humidity distribution was even, and less than 100%, when the VCE system was applied, indicating a low probability of condensation. The results of analyzing the dif-ferences in average indoor air temperature with the VCE system shows that the air tempera-ture was measured to be 1.9℃ lower in the living room, and 2.27℃ lower in the laundry room, the balcony, and the evacuation space, than the air temperatures achieved with the nat-ural ventilation system. As a result of measuring the levels of absolute humidity, the average absolute humidity with the shared exhaust ventilation system was lower by 44.56% in the liv-ing room, the laundry room, and the evacuation space, when compared to the humidity of the natural ventilation opening case. Therefore, the results revealed that the humidity reduction performance was improved when the shared exhaust ventilation system was applied, when compared to the natural ventilation system, which could be effective in the prevention of condensation.

주택환기용 덕트 방식에서 통합 배기 방식의 적용가능성 검토

김재문,문성민,이정재 대한건축학회지회연합회 2007 대한건축학회지회연합회 학술발표대회논문집 Vol.2007 No.1

Recently, the instruction of house ventilation system was necessary because of the recent construction trend and the legal ventilation frequency 0.7 point inside the house of common. It is general in the ventilation system that air supply and return to each room. But that system is not efficient in the economic and construction circle. So we study the instruction of unify ventilation system. The purpose of system is to compare the original ventilation system and unify ventilation system. The results which it applies from actual apartment site are as following. In the wind-amount test, unify ventilation system shows more wind amount than the existing facilities. Pressure loss shows the opposite results. This displays a more efficient ventilation ability and there is also an application possibility. Finally, we finds unify ventilation system's a new possibility and we recognize that more detailed-tests are required to unify ventilation system's practical use.

덕트형 주택환기시스템에서 통합배기 방식의 적용에 대한 실험적 연구

문성민(Moon Sung-Min),김용경(Kim Yong-Kyoung),이정재(Yee Jurng-Jae) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.3

Recently, the instruction of the house ventilation system was necessary because of the recent construction trend and the legal ventilation frequency 0.7 point inside the house of common. It is general in the ventilation system that air supplies and returns to each room. But this system is not efficient when it comes to taking care of economic and construction efficiency. So, we study the instruction of unified ventilation system. The purpose of the system is to compare between original ventilation system and unified ventilation system. The results which it applies to actual apartment site are as followed. In the wind-amount test, unified ventilation system shows more wind amount than that of other existing facilities. Pressure loss shows the opposite results. This displays a more efficient ventilation ability and there is also an application possibility. Finally, we find unified ventilation system contains a brand new possibility and we recognize that more detailed-tests are required to unify ventilation system's practical uses.

주택환기시스템에서의 통합 배기 적용가능성 검토에 관한 연구

문성민(Moon Sung-Min),김광현(Kim Kwang-Hyun),김창남(Kim Chang-Nam),김용경(Kim Yong-Kyoung),이정재(Yee Jung-Jae) 한국건축친환경설비학회 2007 한국건축친환경설비학회 학술발표대회 논문집 Vol.- No.-

Recently, the instruction of house ventilation system was necessary because of the recent construction trend and the legal ventilation frequency 0.7 point inside the house of common. It is general in the ventilation system that air supply and return to each room. But that system is not efficient in the economic and construction circle. So we study the instruction of unify ventilation system. The purpose of system is to compare the original ventilation system and unify ventilation system. The results which it applies from actual apartment site are as following. In the wind-amount test, unify ventilation system shows more wind amount than the existing facilities. Pressure loss shows the opposite results. This displays a more efficient ventilation ability and there is also an application possibility. Finally, we finds unify ventilation system's a new possibility and we recognize that more detailed-tests are required to unify ventilation system's practical use.

수치해석을 이용한 자연환기설비의 환기량 해석에 관한 연구

최태환,이승복,김태연 대한건축학회 2007 대한건축학회논문집 Vol.23 No.9

The importance of well insulated and air tight building is increasing by the recent issue of energy conserving for buildings. However, air tightness of residential buildings causes the problem of decreasing ventilation rates and it is threatening occupants’ health with low indoor air quality. Not only that but also, many problems of mechanical ventilation system, as the alternative for the problem, are reported from recent studies. Thus, natural ventilation system is considered as one of the most efficient approach for the IAQ problem. Within this context, the necessity of verifying the ventilation performance of natural ventilation system is increasing. To confirm, first of all, the reliability of airflow quantity analysis of natural ventilation system by CFD simulation, depressurization test was carried out in a test cell for a natural ventilation system using a blower door and CFD simulation was also carried out under the same condition. The wind pressure coefficients of the analytical building and the discharge coefficient of the natural ventilation system were found by CFD simulation for network airflow analysis. For the analysis of the annual ventilation performance of the natural ventilation system, a network airflow simulation (TRNFLOW) was used. As the results, the natural ventilation system can provide more than 0.7ACH of annual average ventilation rate with appropriate installation area ratio and of appropriate installation area the system.

공동주택의 환기시스템 실태 및 만족도 조사 연구

주정훈(Ju, Jung-Hoon),박진철(Park, Jin-Chul),전영훈(Jeon, Young-Hoon),김동영(Kim, Dong-Young) 대한건축학회 2015 대한건축학회논문집 Vol.31 No.6

In this study, the usage status and satisfaction of the ventilation system installed in apartment houses of Seoul were investigated for 200 households. The summary of that study result is shown as follows: In the survey, approximately more than 20% of the residents in apartment houses were not aware of the installation of the ventilation system. Meanwhile, even in the residents who were aware that the ventilation system is installed, approximately more than 35% answered that they were not using it at all. The reason was their ignorance about how to use the ventilation system. Also, it showed that approximately more than 75% of the residents didn"t perform maintenance of the ventilation system such as cleaning, etc. Besides, in order to enhance the ventilation system in apartment houses, preparation of manuals about usage, and cleaning method (37.58%), and publicity and instruction on the ventilation system in moving in (29.3%) are necessary. On the analysis of satisfaction on the ventilation system, age, gender, period of residence, and number of residence were found to be irrelevant to the characteristics of the respondents. Also, the respondents answered that the difference in each ventilation system such as ceiling & floor type was irrelevant to the satisfaction. For the ventilation system improvement criteria, maintenance (filtering and cleaning, 46.88%) and cleanliness (21.88%) were found to be priority.

공동주택에서 환기설비 도입에 따른 에너지소비 변화에 관한 연구

김형준(Kim Hyung-Jun),김종헌(Kim Jong-Hurn),박준석(Park Jun-Seok) 한국건축친환경설비학회 2009 한국건축친환경설비학회 학술발표대회 논문집 Vol.- No.-

The purpose of this study is to investigate the characteristic of energy consumption in apartments equipped with ventilation system and to analyze the energy consumption of households using ventilation system. As a result of investigation, the number of households using ventilation system is 47, and the number of households not using ventilation system is 99 out of 146 households. And households was classified by the number of residents, as a result, the energy consumption of households using ventilation system is higher than households not using ventilation system. (P<0.05) And households was classified by the area of the residence, as a result, the energy consumption of households using ventilation system is higher than households not using ventilation system only in 92㎡ house. (P<0.05) And energy consumption was classified by the heating and cooling, as a result, there are no difference the energy consumption of households using ventilation system between households not using ventilation system.

주거용 건축물의 환기시스템 관련 제도 분석 및 개선 방향 제안 - 기계 환기시스템의 팬 에너지 절감을 중심으로

윤요선(Yun, Yo-Sun),조경주(Cho, Kyung-Joo) 한국건축친환경설비학회 2021 한국건축친환경설비학회 논문집 Vol.15 No.5

Currently, laws and rating systems related to residential ventilation systems focus on improving indoor air quality and responding to fine dust problems rather than energy saving technologies. In terms of energy savings, the ventilation system of an apartment house has a large ripple effect because a system developed for an apartment house can be applied to several households at the same time. The purpose of this study is to analyze the laws, rules, rating systems, and existing literatures related to residential ventilators, and to derive a system improvement plan for reducing ventilation energy of residential buildings. Through the analysis of domestic policies, laws and rating systems related to residential ventilation systems, the performance standards were analyzed with energy-related provisions of mechanical ventilation systems applied in residential buildings. The basic performance of mechanical ventilation systems of residential buildings should comply with the Rules on facility Standards of Buildings. However, energy savings need not to be considered mandatory. For this reason, firstly through the analysis of existing research, room-by-room control and bypass control were derived as ventilation energy reduction technologies. and filed experiments were conducted to verify the technology. As a result of the field test, when the bypass mode was applied, it was reduced by 42~55% compared to the heat recovery ventilation mode. When room-by-room control is applied, fan power can be reduced by 8 to 49% compared to all-room control. In this study, based on the research results, improvement proposals for ventilation-related laws, rules and rating systems were proposed. It is to reflect the contents of room-by-room control and bypass control in the residential ventilation system.

A dynamic gain-scheduled ventilation control system for a subway station based on outdoor air quality conditions

Loy-Benitez, Jorge,Li, Qian,Ifaei, Pouya,Nam, Kijeon,Heo, SungKu,Yoo, Changkyoo Elsevier 2018 Building and environment Vol.144 No.-

<P><B>Abstract</B></P> <P>Within subway stations, the use of a mechanical ventilation system is a common strategy for improving the indoor air quality (IAQ). These ventilation systems use outdoor air to dilute pollutants on the subway platforms. However, a fixed fan speed in manual subway station ventilation systems does not consider variations in IAQ dynamics caused by disturbances yielded by the outdoor air quality (OAQ). Since the IAQ in subway stations has become a major public health concern, this study aims to analyze the IAQ dynamics at different OAQ conditions to design a new dynamic ventilation control system. The proposed method implemented a Gain Scheduling control strategy over OAQ variations at the D-Subway Station in the Seoul metropolitan area. A set of one feedback (FB) and two feedforward (FF) controllers was implemented. The results showed that the proposed control system tuned with the internal model control (IMC) method achieved an energy saving of 9% in comparison to the manual ventilation system. It was estimated a decrease in energy consumption of 158 kWh/day, representing an emission reduction of 268 kgCO<SUB>2</SUB>/day. Following, an energy cost reduction of 4325 USD yearly was estimated. Additionally, the indoor particulate matter level is maintained below a control limit considered to be unhealthy for sensitive groups (150 μg/m<SUP>3</SUP>).</P> <P><B>Highlights</B></P> <P> <UL> <LI> A dynamic gain scheduled ventilation control system dependent on outdoor air conditions was proposed for subway platforms. </LI> <LI> The indoor air quality dynamics were explored and adjusted depending on the outdoor air quality. </LI> <LI> The proposed ventilation control system reduced energy consumption by 9% in comparison to the manual ventilation system. </LI> <LI> Annual GHG emissions could be decreased by 97,820 kg CO<SUB>2</SUB> with the proposed ventilation control system. </LI> <LI> The proposed control system shows energy-saving potential adaptability for standard subway stations. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>