• 설비공학논문집
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• 제15권12호
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• pp.1018-1027
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• 2003

This study treats the analysis of the performance and the design of plume abatement wet/dry cooling tower with dry type heat exchanger using a numerical method. A two-dimensional analysis is performed using the finite volume method for mechanical draft counterflow and crossflow tower. For a coupling problem between water and air system, a turbulent two phase flow is considered. Effectiveness-NTU method is used for modeling of the dry type heat exchanger. The parameter change simulations of the outer wall shape, the relative flowrate of air, and attachment of an air mixer are performed to examine the effect on plume abatement. It is found that if the relative air flowrate ratio and the adequate air mixer type are chosen well in addition to the ratio of water to air flowrate, the loss of the cooling capacity and the additional cost are reduced and the plume is abated.

• International Journal of Air-Conditioning and Refrigeration
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• 제13권2호
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• pp.61-70
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• 2005

This study treats the numerical analysis of performance and design for plume abatement wet/dry cooling tower with a dry type heat exchanger. A two-dimensional analysis is performed using the finite volume method for mechanical draft counterflow and crossflow tower. For a coupling problem between water and air system, a turbulent two phase flow is considered. The Effectiveness-NTU method is used for modeling of the dry type heat exchanger. The parametric simulations such as the relative flowrate of air and attachment length of an air mixer are performed to examine the effect on plume abatement. It is found that if the relative air flowrate ratio and the adequate air mixer type are chosen well in addition to the ratio of water to air flowrate, the loss of cooling capacity and the additional cost are reduced and the plume is abated.

• 사상체질의학회지
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• 제25권4호
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• pp.442-453
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• 2013

Objectives This case study was about a Taeeumin patient with advanced Parkinson's disease diagnosed as Dry-heat symptomatic pattern. In this study, we reported significant improvement of motor and non-motor symptoms of this patient after Sasang constitutional medicine treatment. Methods The patient was diagnosed with Taeeumin Dry-heat symptomatic pattern and treated with Taeeumin's constitutional medications and acupuncture. The primary outcome measure for this study is Unified Parkinson Disease Rating Scale(UPDRS) to assess the overall function of patient. Secondary outcome assessments include Global Assessment Scale(GAS), change of patient's sleep, stool and urine. Results and Conclusions The patient treated with Taeeumin's constitutional medications and acupuncture had reduction in UPDRS (specifically Part II, Part III and Part IV) and GAS of motor symptoms. Furthermore, patient's sleep, stool and urine were reported to be normal after treatment. In conclusion, this study shows that Sasang constitutional medicine can be effective treatment for Taeeumin patient with Advanced Parkinson's disease diagnosed as Dry-heat symptomatic pattern.

• 신재생에너지
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• 제5권4호
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• pp.60-65
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• 2009

The present study was conducted for a comparative evaluation of wet and dry floor heating systems using geothermal heat pump. We circulated hot water from geothermal heat pump which is $10{\sim}15^{\circ}C$ lower than that from boiler. In order to access indoor temperature ($25^{\circ}C$) it took 74 minutes for dry type and 247 minutes for wet type. Average floor temperature was $23.9^{\circ}C$ for wet type and $32.7^{\circ}C$ for dry type. Energy saving rate gradually increased by 66% after 138 minutes. As a result, in case of floor heating system using low temperature circulation water, dry type was more practicable for stable floor heating than wet type in terms of floor temperature and access time to indoor set temperature.

• 사상체질의학회지
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• 제29권4호
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• pp.376-386
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• 2017

Objectives This case study is about a Taeeumin patient with Parkinson's disease identified as Dry-heat (Joyeol) pattern. In this study, we report significant improvement of motor and non-motor symptoms of this patient after Sasang constitutional medicine treatment. Methods The patient was identified as Taeeumin Dry-heat pattern and treated with Cheongsimyeonja-tang and acupuncture. The Unified Parkinson Disease Rating Scale(UPDRS) was used to assess the overall function of the patient. And the Global Assessment Scale (GAS) was used to assess the change of bradykinesia, tremor and dry mouth after the treatment. Results The UPDRS total score decreased from 145 points to 77 points after 5 weeks treatment. And symptoms of bradykinesia, tremor and dry mouth showed significant improvement in GAS after the treatment. Furthermore, constipation, sleep disturbance, dysuresia and anorexia were reported to be improved after treatment. Conclusions This study shows that Sasang constitutional medicine can be effective treatment for motor and non-motor symptoms caused by Parkinson's disease.

• International Journal of Air-Conditioning and Refrigeration
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• 제17권1호
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• pp.7-14
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• 2009

Water condensate accumulated on the surface of a fin-and-tube heat exchanger significantly affects its thermal and hydraulic performances. The purpose of this study is to investigate the effects of condensate retention on the air-side heat transfer performance and flow friction for various flow and geometric conditions. Total of twelve samples of slit and plate fin-and-tube heat exchangers are tested under dry and wet conditions. The thermal fluid measurements are made using a psychrometric calorimeter. Frontal air velocity varies in the range from 0.7 m/s to 1.5 m/s. Using the experimental data, presented are heat transfer coefficients in terms of Colburn j-factors and friction factors, and these data are compared with the existing correlations.

• 한국산업융합학회 논문집
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• 제5권3호
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• pp.165-171
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• 2002

The thermosyphon has been used as a heat transmission device in the heat recovery of low level energy and cooling for heat generating equipments. Many studies on the working fluids and wicks have been reported to improve the heat transfer efficiency of the thermosyphon. A low temperature heat pipe with acetone is chosen in the present study to compare the heat transfer characteristics due to pouring amount of working fluid, magnitude of power supplied and tilt angles. The thermosyphon made ⵁ$15.88{\times}0.8t{\times}600mm$ of copper, evaporation section 200mm, insulation section 25mm, condensation 375mm. Heat transfer rate of the thermosyphon increase as magnitude of power supplied increase and observe dry out phenomenon at 5~10% of pouring amount of working fluid. So thermosyphon at the 150kJ/s judged to need 12% or more. Heat transfer rate of the thermosyphon have nothing to do with tilt angles. Dry out phenomenon of the thermo syphon makes it possible that a low temperature thermosyphon may be used to control temperature and heat transfer of a system when the critical quantity of a working fluid is supplied in the thermosyphon.

• 사상체질의학회지
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• 제30권2호
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• pp.1-7
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• 2018

Objective This study was designed to define the efficacy of medicinal herbs of Taeeumin in Sasang constitutional medicine. Method We searched and analyzed original text such as Donguisusebowon Sinchuk edition written in 1901, Donguisusebowon Gabo edition written in 1894, Donguisusebowon Sansang Chobongwon, and posthumous manuscripts left by Je-ma Lee published by the Ministry of Health of North Korea. Results Seven herbs such as Ephedrae Herba, Coicis Semen, Castaneae Semen, Fel Ursi, Mori Cortex Radicis, Ginkgonis Semen, and Farfarae Flos regulate the mechanism of Esophagus-Cold (Wiwanhan). Three herbs such as Melonis Pedicellus, Ailanthi Radicis Cortex, and Quisqualis Fructus regulate the mechanism of Cold Lung-Dry (HanpaeJo). Sixteen herbs such as Rhei Rhizoma, Angelicae Tenuissimae Radix, Puerariae Radix, Cimicifugae Rhizoma, Angelicae Dahuricae Radix, Moschus, Gleditsiae Spina, Mume Fructus, Aurum, Glycine Semen Germinatum, Ampelopsis Radix, Cornu rhinocerotis, Antelopis Cornu, Bomeolum, Bezoar Bovis, and Typhae Pollen regulate the mechanism of Liver-Heat (Ganyeol). Three herbs such as Chrysanthemi Indici Flos, Nelumbinis Semen, and Spirodelae Herba regulate the mechanism of Heat Lung-Dry (YeolpaeJo). Conclusion Forty four herbs of Taeeumin regulate the mechanisms of Esophagus-Cold (Wiwanhan), Cold Lung-Dry (HanpaeJo), Liver-Heat (Ganyeol), Heat Lung-Dry (YeolpaeJo) and correct the energy-fluid pathology of Taeeumin.

• 설비공학논문집
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• 제15권2호
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• pp.132-136
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• 2003

For the study of performance evaluation on different shape heat exchangers that have the same energy consumption in a refrigerator, we make performance evaluation coefficient (PEC) which can distinguish performance of different shape heat exchangers. The results were reported in order to compare with for the dry frosting and wet frosting test as various definition of PECs. Results showed that PEC of dry frosting test is higher than that of wet frosting test because attached water droplet increases pressure drop of air-side then this decreases performance of heat exchanger.

• 한국축산식품학회지
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• 제30권6호
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• pp.1024-1030
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• 2010

굽기에 비해 삶기를 했을 경우 중량과 부피의 감소가 큰 것으로 나타났다. 부위별로 조금씩의 차이를 보이기는 하지만 지방은 조리 후에 증가하는 것으로 조사 되었으며 수분과 단백질은 감소하는 것으로 조사되었다. 무기질함량은 굽기를 했을 때 증가하는 경향을 보였으며, 삶기를 했을 때 감소하는 경향을 보였다. 영양소 잔존율는 굽기에서 삶기에 비하여 높게 나타나는 경향을 보이는 것으로 조사되었고, 수분, Na, K, P에서 유의적인 차이를 보였다(p<0.05). 잔존율 변화는 기존 분석자료와 비교했을 때 조리후의 영양소가 오히려 증가하는 것처럼 보이나 잔존량계수 계산법을 사용하게 되면 영양소가 감소하거나 증가 폭이 줄어드는 것으로 나타났다. 전국적으로 유통되는 한우는 더 다양하며, 등급 품질 역시 5등급으로 구성되어 한우의 일부 특성만을 보여주고 있다는 한계점을 지니고 있다. 따라서 추후 국내에 유통되는 다양한 브랜드 한우를 이용한 연구가 이루어져야 할 것이다.