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판상형 공동주택의 동 배치 및 종횡비에 따른 풍압계수 특성에 관한 연구
윤성훈,Yoon, Seong-Hoon 한국융합학회 2021 한국융합학회논문지 Vol.12 No.9
건축물의 환기성능 평가를 위한 모델링 과정에서 핵심 경계조건으로 활용되는 풍압계수는 통상 저층형 단일 건물에 대해서만 자료화되어 있어, 공동주택 단지와 같은 고층형 집합주택의 모델링 시에는 적용할 수 없다. 이에 본 연구에서는 CFD(Computational Fluid Dynamics)해석을 통해 건물의 배치 및 종횡비가 다른 판상형 공동주택에 대하여 풍향각에 따른 풍압계수의 특성을 분석하고 유형화함으로써 환기 모델링 시 참고할 수 있는 기초자료를 제시하였다. 풍향각 0도의 경우 가장 풍상측에 위치한 건물의 정면에서는 좌우가 반전된 S자 형태의 풍압계수 분포가 나타났으며, 최하층, 최상층 및 2개의 변곡점에 해당하는 풍압계수는 건물의 높이와 관계없이 비교적 근사한 값을 보였다. 저층부의 변곡점은 약 11m 높이에 형성되었으며, 고층부 변곡점의 높이는 건물의 높이에 비례하는 추세식을 통해 산출가능함을 확인하였다. 또한 풍향각 45도 조건을 제외하면 대부분의 조건에서 풍압계수의 평균값을 적용 가능함을 확인하였다. In this study, basic data that can be referenced for ventilation modeling was presented by analyzing the characteristics of wind pressure coefficients(Cp) according to wind direction angles under conditions of different building layouts and aspect ratios through CFD (Computational Fluid Dynamics) analysis for flat-type apartment complexes. In the case of a wind direction angle of 0°, Cp distribution in the form of an inverted S-shape was shown on the front of the building located on the windward side. And Cp corresponding to the lowest floor, the uppermost floor, and the two inflection points showed relatively close values regardless of the height of the building. The inflection point of the low-rise part was formed at a height of about 11m, and the height of the high-rise part could be calculated through a trend formula proportional to the height of the building. It was confirmed that the averaged Cp value can be applied in most conditions except for the wind direction angle of 45 degrees.
원저 : 비소세포폐암에서 Maspin의 발현과 임상적 의의
윤성훈 ( Seong Hoon Yoon ),김원진 ( Won Jin Kim ),신경화 ( Kyung Hwa Shin ),김미현 ( Mi Hyun Kim ),조우현 ( Woo Hyun Cho ),김기욱 ( Ki Uk Kim ),박혜경 ( Hye Kyung Park ),전두수 ( Doo Soo Jeon ),김윤성 ( Yun Seong Kim ),이창훈 ( Ch 대한결핵 및 호흡기학회 2011 Tuberculosis and Respiratory Diseases Vol.70 No.2
Background: Maspin (mammary serine protease inhibitor) is a member of the serpin superfamily. A few studies have examined the role of maspin in tumor suppression of non-small cell lung cancer (NSCLC); however, its role in the development and progression of NSCLC still remains controversial. We evaluated the immunohistochemical expression of maspin in order to elucidate its clinical significance in NSCLC. Methods: We analyzed 145 patients with pathologically confirmed NSCLC, including 66 cases of squamous cell carcinomas (SCCs) and 79 cases of adenocarcinomas (ADCs). We performed a immuno-histochemical stain with maspin and PCNA (proliferating cell nuclear antigen) using tissue microarray blocks. Results: There were 108 men and 37 women in the study population. The mean age of patients in the study was 63.7 years (range, 40.0∼82.0; median, 65.0). The proportion of maspin expression was significantly higher in SCCs (52/66, 78.8%; p<0.01) than in ADCs (17/79, 21.5%; p<0.01). Maspin expression was not associated with PCNA (p=0.828), lymph node involvement (p=0.483), or tumor stage (p=0.216), but showed correlation with well-to-moderate tumor differentiation (p=0.012). There was no observed correlation between maspin expression and survival with NSCLC (p=0.218). Conclusion: The present study suggests that maspin expression was significantly higher in SCCs than in ADCs and was associated with low histological grade. However, maspin expression was not an independent factor to predict a prognosis in NSCLC.
바닥급기 시스템의 에너지절감 성능 및 조명 부하의 영향에 관한 연구
윤성훈(Yoon, Seong-Hoon),유지용(Yu, Ji-Yong),유기형(Yu, Ki-Hyung) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.4
The UFAD(Under Floor Air Distribution) system is generally known as more energy efficient and comfortable than the CBAD(Ceiling Based Air Distribution) system. In practice, however, some buildings with the UFAD system have been less effective in energy performance and have been reported for uncomfortable indoor environment. Such problems are due to a failure to consider the features of UFAD system when it is planed, operated and used designs that just meet design standards for conventional the CBAD system. In this study, measurements have been carried out to clarify the temperature difference between occupied and unoccupied zone of an UFAD system. Simplified formula was suggested for estimating the adopted supply air flow rate and RA(Return Air) temperature of HVAC system. By using TRNSYS 16 the energy performance of the UFAD system and the impact of the thermal load of lighting have analysed. Annal energy use of the UFAD system has been evaluated reduction of 13.1% for the CBAD system. And energy saving performance of UFAD system was varied from 1.6% to 16.1% by the proportion of radiative thermal load of the lighting.
가압식 바닥공조 시스템과 야간 외기냉방의 병용에 따른 에너지저감 성능에 관한 연구
윤성훈(Yoon Seong-Hoon) 한국태양에너지학회 2020 한국태양에너지학회 논문집 Vol.40 No.1
It has been reported about the energy saving performance of UFAD(under floor air distribution) system and NPC(night purge cooling) system respectively which are applied for commercial buildings. However, when two systems are used at the same time, the effect of heat transfer from floor plenum to slab may vary depending on the operating conditions of NPC. In this study, cooling energy demands were analyzed for building models with UFAD and NPC by using TRNSYS 17 program. UFAD was applied as a cooling system of the base building model, and the cooling energy demands were compared for 64 cases in which the operating time, supply airflow rate, and outdoor air temperature(To) of NPC. As a result, i t was confirmed that the cooling energy demands were reduced to 30 ~ 80% level compared to UFAD alone, and in particular, the energy demand was reduced in proportion to the supply airflow rate or the operating time while To was 16 ~ 20℃. However, when To was 22℃, the increase in the supply airflow rate or the operating time results in a disadvantage in terms of cooling energy demands. In addition, the cooling energy demands for UFAD+NPC model were analyzed by applying weather data from three regions with different average outdoor air temperatures. As a result, the cooling energy demand of operating NPC only when To was below 20℃ was reduced by 27% compared to that of operating NPC continuously for 8 hours.
실내 부하조건에 따른 바닥공조 시스템의 에너지 성능 평가
윤성훈(Seong-Hoon Yoon),장향인(Hyang-In Jang),김경아(Kyung-Ah Kim),유기형(Ki-Hyung Yu),서승직(Seung-Jik Suh) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.1
The present study has been conducted for evaluating and comparing the performance of the underfloor air distribution system(UFAD) and the ceiling based air distribution system(CBAD) under cooling condition. Simulations and experiments were carried out for verifying the model by TRNSYS program about UFAD and CBAD. The results of simulation for various conditions of thermal load are summarized as followings. UFAD had an advantage for making thermal comfort because of lower temperature of the floor surface. Moreover, UFAD showed lower fan power about 30~50% than CBAD under the same conditions of thermal load. The energy saving rates of UFAD were increased to 17.7% in proportion to the thermal load on unoccupied zone(lighting). Ultimately, additional investigations should be done for analyzing optimized operating conditions of UFAD with considering the thermal performance of building envelop and the thermal load.