• Proceedings of the SAREK Conference
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• 2007.11a
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• pp.322-327
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• 2007

Dedicated outdoor air-conditioning(DOA) system that utilizes pre-cooling and desiccant dehumidification can be superior to conventional cooling and reheating system with respect to energy consumption and indoor thermal comfort. In this work, simulation has been conducted to study various factors that affect the performance of DOA. Dynamic simulation shows the transient variation of temperature and humidity as the on/off control logic is imposed. Exit humidity of process air and flow rate are varied to study the effect on exit temperature of process air, dehumidification quantity, required regeneration temperature and exit humidity of regeneration air. For an outdoor air condition of $28.5^{\circ}C$ temperature, 16 g/kg humidity ratio and 2000 cmh flow rate, the dehumidification efficiency is increased by 4.6% as the flow rate is doubled.

• Journal of architectural history
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• v.28 no.4
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• pp.7-16
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• 2019

In this study, I would like to inquire about the composition of oegi(外機) on the hip and gable roof. Oegi purlin compose the basic member of framework of a hip and gable roof in both sides roof, supporting the inside end of the side rafter. However, the oegi purlin is not simply used to form hip and gable roof. The effects of using oegi purlin have the advantages of spatial. The spatial advantages are the width of the toekan(退間) increases as the oegi purlin escapes from column row and to increase the ceiling height by becoming a point of staying the ceiling. That reflect the desire to expand indoor space due to changes in worship behavior. Oegi purlin was used not only for structural needs, but also for altering in indoor space due to the changing times.

• Journal of Korean Medical Ki-Gong Academy
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• v.2 no.1
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• pp.129-147
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• 1998

• Air Cleaning Technology
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• v.25 no.2
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• pp.15-25
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• 2012

• Journal of Korean Medical Ki-Gong Academy
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• v.3 no.2
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• pp.108-117
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• 1999

• Journal of Korean Medical Ki-Gong Academy
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• v.2 no.2
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• pp.7-14
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• 1998

• Journal of Power System Engineering
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• v.17 no.4
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• pp.12-16
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• 2013

• Journal of Advanced Marine Engineering and Technology
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• v.39 no.6
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• pp.604-608
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• 2015

In this paper, we study the characteristics of heat transfer for an insulated multi-core tube using glass wool as an insulator for the multi-core tube. By performing experiments and modeling, we examine the variations in the temperature characteristics of hydraulic oil inside the multi-core tube with atmosphere temperature, inlet temperature, and the flow rate of hydraulic oil for the insulated multi-core tube that we developed. When the minimum inlet flow rate of hydraulic oil employed within the scope of the research is 0.29 l/min, the temperature difference obtained in the experiments and numerical analysis was a maximum of $3^{\circ}C$. For a constant atmospheric temperature, as the inlet temperature of the hydraulic oil increases, the outlet temperature of the hydraulic oil will also increase, regardless of its inlet flow rate. Further, when the inlet flow rate of the hydraulic oil is more than 1.01 l/min, the effect of the atmospheric temperature on the temperature drop of the hydraulic oil is low.

• Journal of Advanced Marine Engineering and Technology
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• v.35 no.8
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• pp.1124-1131
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• 2011

This study performed the prediction about the indoor contaminant's diffusion characteristics which can be affected by the mechanical ventilation system on a training ship. The results are as followings. It is clear that the contaminants are spread to most of the indoors, regardless of the contamination beginning zone. About 65~100 minutes later, the contaminant densities of whole indoor zones are evaluated as clean. Comparing the contamination beginning zone being located at higher deck(scenario A) to the contamination beginning zone being located at lower deck(scenario B), although the contaminant density by scenario A is 10 times higher than that by scenario B, the number of contaminated zones are 50% less. The contaminant densities are evaluated as to be rapidly decreased when the outside air induction ratio against design volume is over 75%.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.38 no.7
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• pp.571-579
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• 2014

A series of field tests on hybrid desiccant cooling systems were conducted in July-August, 2013. The temperature and humidity of the supply and return air, power, and heat consumption were monitored and transferred in real time through the Internet. The performance parameters of the cooling system, namely, cooling capacity and COP (coefficient of performance), were evaluated from the measured data and their variations under outdoor conditions was analyzed. It was found that with increase in the outdoor temperature, the total energy decreases and cooling capacity increases whereas the latter decreases with increase in the outdoor humidity. The COP was also found to increase with the increase in outdoor temperature.