• Title/Summary/Keyword: heating jang

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Evaluation of Energy Loads for Broiler-Standard Design Models Using a Building Energy Simulation Method (건물에너지시뮬레이션 기법을 이용한 육계사 표준설계모델의 에너지 부하 산출)

  • Kwon, Kyeong-seok;Yang, Ka-young;Kim, Jong-bok;Jang, Dong-hwa;Ha, Taehwan;Jeon, So-ra
    • Journal of The Korean Society of Agricultural Engineers
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    • v.65 no.1
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    • pp.27-39
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    • 2023

  • This study was to quantitatively evaluate periodic and maximum energy loads for broiler-standard design models by the Ministry of Agriculture, Food and Rural Affairs (2016). Building energy simulation method was used to compute heating and cooling loads of the designed broiler houses according to regional locations and insulation characteristics of wall and roof. It considered sensible and latent heat generation from broilers, dynamic operation of ventilation system according to environment variations. It was found that variation of periodic heating loads was relatively higher than that of periodic cooling loads according to thickness changes of wall and roof. Assuming that broiler was raised at every even-month, periodic heating and cooling loads were 6 and 18% lower, respectively than odd-month raising condition. When recommendation rules of insulation characteristics (wall and roof thickness) by the Ministry of Land, Infrastructure and Transport was adopted, periodic heating load of Jeju-si was 20.3% higher than national average values. Based on the BES computed periodic and maximum energy loads under the designed experimental condition, these results can contribute to reestablishing standard design of broiler houses, especially for insulation characteristics, and designing management strategies for efficient energy uses.

  • https://doi.org/10.5389/KSAE.2023.65.1.027 인용 PDF HTML

Effect of Growing Part Following Local Heating for Cherry Tomato on Temperature Distribution of Crop and Fuel Consumption (방울토마토 생장부 추종 국소난방이 군락 온도분포 및 연료소비에 미치는 영향)

  • Kwon, Jin Kyung;Kang, Geum Chun;Moon, Jong Pil;Lee, Tae Seok;Lee, Su Jang
    • Journal of Bio-Environment Control
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    • v.24 no.3
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    • pp.217-225
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    • 2015

  • Local heating system providing hot air locally to growing parts including shoot apex and flower cluster which were temperature-sensitive organs of cherry tomato was developed to reduce energy consumption for greenhouse heating without decline of crop growth. Growing part following local heating system was composed of double duct distributer which connected inner and outer ducts with hot air heater and winder which moved ducts up and down following growing parts with plant growth. Growing part local heating system was compared with conventional bottom duct heating system with respect to distributions of air and leaf surface temperatures according to height, growth characteristics and energy consumption. By growing part local heating, air temperature around growing part was maintained $0.9{\sim}2.0^{\circ}C$ higher than that of lower part of crop and leaf surface temperature was also stratified according to height. Investigations on crop growth characteristics and crop yield showed no statistically significant difference except for plant height between bottom duct heating and growing part local heating. As a result, the growing part local heating system consumed 23.7% less heating energy than the bottom duct heating system without decrease of crop yield.

  • https://doi.org/10.12791/KSBEC.2015.24.3.217 인용 PDF KSCI

Analysis of surface-hardening Induction heating (가동자석형 엑츄에이터의 특성해석)

  • Jang, S.M.;Ko, J.W.;Yoon, I.K.;Lee, S.H.
    • Proceedings of the KIEE Conference
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    • 2002.07b
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    • pp.703-705
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    • 2002

  • The actuator consists of winding as a stator and mover includes permanent magnet. The Linear Oscillatory Actuator(LOA) has very few components and a highly simplified structure, and therefore promises to be simple and reliable. In this paper, LOA was designed and manufactured. before design and manufacture, characteristic of thrust was analyzed using FEA. LOA was manufactured according to design specification.

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The Effect of Differential Heat Treatment on the Mechanical Properties and Microstructure of the Large Back-up Roll (대형Back-Up roll에서 차등열처리가 기계적 성질 및 조직변화에 미치는 영향)

  • Kim, Gyeong-Hyeon;Gang, Seok-Bong;Jeon, Ui-Jin;Jang, Yun-Seok
    • 한국기계연구소 소보
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    • s.16
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    • pp.3-16
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    • 1986

  • The first specimens were sampled across the depth of roll products processed by rapid heating and cooling of the roll, namely, differential heat treatment. The second samples were taken from the non-heat treated roll at different depths. The samples were heat treated following the same temperature history as that at each corresponding location in the roll where the samples were taken. Consequently, both specimens showed the similar microstructure and mechanical properties (tensile, impact and fatigue strength etc.)

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