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고석보(Seok-Bo Ko),이금배(Kum-Bae Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Recently the fluidized bed type heat exchanger systems become attractive among the energy managers and researchers mainly, because of their nature of increase in heat transfer rates, reduction or elimination of fouling and corrosion resistance. As the particles become 'sticky' when they are wet, some kinds of countermeasure should be provided for the successful operation, especially in the start-up period. Careful attention needs to be paid to the rate of particle ingestion as well. In this study, in order to overcome these operational challenges an automatic control system of particle in a fluidized bed heat exchanger was established. This control system has the operation modes such as three steps, that is, a start-up, steady operation and closing process. All control valves for the three steps operate in an automatic way.
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박진양(Jin-Yang Park),고석보(Seok-Bo Ko),전희호(Hee-Ho Jun),전용두(Yong-Du Jun),이금배(Kum-Bae Lee) 대한설비공학회 2007 설비공학 논문집 Vol.19 No.3
Although the importance of good conservation of historical sites including ancient royal tombs is well aware, still not much attention has been paid for facilities to realize it. There are numerous ancient royal tombs spread in Korean peninsula which are opened and some of them are selectively on display for public access. However, the conservation measures of these sites have not been seriously investigated. Even the level of understanding of the underground environment of tombs is not satisfactory. In the present study, we focus on the dehumidification loads to maintain appropriate conservation conditions in terms of temperature and humidity. Two experimental tombs different in size were built in KNU (Kongju National University) campus with the dimensions (L×W×H) of 1.0m×2.8m×1.0m and 1.3m×3.0m×1.2m, respectively. HVAC systems are installed to maintain a suitable condition for conservation, i.e., 22±2℃ in temperature and 55±5% in relative humidity. The condensed water are measured to estimate the dehumidification loads while the temperature and the humidity inside the tombs were maintained within the specified range.
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박진양(Jin-Yang Park),고석보(Seok-Bo Ko),전희호(Hee-Ho Jun),윤영묵(Young-muk Youn),이금배(Kum-Bae Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
In recent years the importance of the preservation of cultural artifacts like ancient tombs has been widely accepted domestically and internationally as the quality of life improves. However, not much attention has been paid for the facilities and systems to preserve those artifacts. Researchers have recently begun addressing the above issue and developing suitable system for the tomb conservation in Republic of Korea. In the present study, an duct-type HVAC system for a tomb (D×W×H=1.3m×3.0m×1.2m) was installed to maintain suitable indoor conditions for conservation of tomb. The temperature, humidity and condensed water inside the tomb are measured to estimate the dehumidification loads while the temperature and the humidity inside the tombs were maintained during the rainy season.
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