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RISS 인기검색어
- 검색키워드
- 저자 : Rou Wen (검색결과 3 건)
- 무료
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Study on a Wireless Environmental Monitoring System for Duck Incubator
( Rou-yan Peng ),( Suming Chen ),( Kuang-wen Hsieh ),( Chao-yin Tsai ),( Chih-hsiang Hsu ),( Jin-ming Tsai ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Taiwan's domestic development of incubators are in simple structure, at low prices, and generally used by the industry. However, high number of regional dead eggs, the inability to understand the environmental conditions of incubator and other issues occurred frequently, resulting in operation and production difficulties. This research developed a wireless environmental monitoring system to collect data and upload to the cloud. A variety of environmental sensors and Raspberry Pi 3 were used in the establishment of wireless sensing module and environmental information detection platform. The environmental information was displayed in real-time and uploaded to the cloud. Computational fluid dynamics (CFD) was also used to simulate the internal flow field inside the incubator to determine the environmental control features, and control heating and humidification equipment with a PID controller. In this study, the establishment of wireless environmental monitoring system was completed. The wireless sensing module and the environment information detection platform have also been developed and tested. The stability of wireless sensing module was 98.5%, and the CFD simulation error was under 20%, which was low enough to predict the actual field temperature changes, and can be applied to the regulation of the incubator environment.
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Simulation of Poultry House Ventilation using Computational Fluid Dynamics
( Chih-hsiang Hsu ),( Sumingchen ),( Kuang-wen Hsieh ),( Chao-yin Tsai ),( Rou-yan Peng ),( Jin-ming Tsai ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Poultry output value in Taiwan takes a large proportion of whole livestock production. However, in 2014, it was suffered from a serious bird flu invasion in Taiwan, culling a large number of poultries. Take geese as an example, almost 90% of the geese were culled in 2014. As a result, it caused serious losses to livestock industry. In order to prevent outbreak of bird flu, the government has stipulated that poultry houses must be rebuilt as non-open poultry houses and rehabilitated. Therefore, the development of the design in closed poultry houses is important. In this study, Computational Fluid Dynamics (CFD) was used to simulate a 30 m <sup>*</sup> 8.5 m <sup>*</sup> 3.6 m closed poultry house. There are two suction fans used for longitudinal ventilation. Through the different circulation fan setups to evaluate for the growth conditions of poultry and improve the ventilation of closed poultry houses, and reduce the possibility of invasion of pathogenic sources at the same time. The results showed when a circulation fan was not placed, there was a phenomenon of non-uniform airflow distribution within 6 m near water-cooled wall. When a circulation fan was placed 3 m away from the water-cooled wall, some parts of the airflow concentrated near the fan and caused non-uniform airflow distribution within 9 m near the water-cooled wall, which may be unsuitable for poultries living. The study showed that simulation of flow field facilitates designs of non-open poultry houses.
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Seismic Axial Loads in Steel Moment Resisting Frames
Jay Shen,Bulent Akbas,Onur Seker,Bilge Doran,Rou Wen,Eren Uckan 한국강구조학회 2015 International Journal of Steel Structures Vol.15 No.2
During the 1994 Northridge Earthquake, many buildings with modern steel moment resisting frames (SMRFs) suffered from connection failures. One year later, similar damage has occurred in the 1995 Kobe earthquake in Japan. The unexpected seismic response of SMRFs resulted in comprehensive analytical and theoretical investigations and major changes in steel building design have been implemented consequently. One of the requirements in the subsequent seismic design codes is the stability check of the columns. Column yielding in a seismic force resisting systems (SFRSs) is not the desired damage mode and might result in column rupture or global buckling and threaten life safety. This study focuses on exploring the seismic axial loads for columns in SMRFs under strong ground motions. For this purpose, the increase in axial loads in low-, medium-, and high-rise SMRFs are investigated at the maximum lateral load level and the corresponding lateral displacement. The results are presented in terms of PHRs, average system overstrength factors (Ωo) of all columns in the frames under the selected ground motions, the distribution of Ωo in the individual columns in the frame, and axial load levels in columns. The results indicate that axial load level remains below 0.4 in the columns for low- and medium-rise frames, whereas it may get as high as 0.95 in highrise frames.
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