• Title/Summary/Keyword: upper burner

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The Study on the Optimization of Burner and Heat Exchanger for Condensing Gas Boiler (응축 가스보일러의 연소기와 열교환기의 최적화 연구)

  • 박준규;이석희;정영식;이창언;금성민
    • Proceedings of the Korea Society for Energy Engineering kosee Conference
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    • 2000.04a
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    • pp.201-207
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    • 2000
  • This study was carried out to optimize burner and heat exchanger of the condensing gas boiler which can save energy by utilizing latent heat of combustion gas and reduce pollutant in exhaust gas. The heat exchanger of the gas boiler was composed of three parts, which were an upper. lower , and coil heat exchanger . The upper heat exchanger was placed outside of the premixed burner and a lower heat exchanger was located under the upper heat exchanger. And, coil heat exchanger rounded the outer surface of an upper and lower heat exchanger. The boiler designed by this research reaches turn-down ratio 4 : 1 in the domain of equivalence ratio 0.75-0.8 and thermal efficiency of 97% . Emission of NOx and CO concentration was under 20ppm and 140ppm at equivalence ratio 0.8 . When diameter of the burner replace 60mm by 50mm. emission of CO was reduced about 50ppm remarkably.

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The Study on the Optimization of Premixed Gas Burner and Heat Exchanger (예혼합 가스버너와 열교환기의 최적화 연구)

  • Lee Kang Ju;Jang Gi Hyun;Lee Chang Eon
    • Journal of the Korean Institute of Gas
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    • v.7 no.4 s.21
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    • pp.7-13
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    • 2003
  • This study was carried out to optimize premixed burner and heat exchanger of the condensing gas boiler which can save energy by utilizing latent heat of combustion gas and reduce pollutant in exhaust gas. The heat exchanger of the gas boiler was composed of three parts, which were an upper, lower, and coil heat exchanger. The upper heat exchanger was placed outside of the premixed burner and a lower heat exchanger was located under the upper heat exchanger. And, coil heat exchanger rounded the outer surface of an upper and lower heat exchanger. The boiler designed by this research reaches turn-down ratio 4:1 in the domain of equivalence ratio 0.75${\~}$0.8 and thermal efficiency of $97\%$. Emission of NOx and CO concentration was under 20ppm and 140ppm at equivalence ratio 0.8. When diameter of the burner is replaced from 60mm to 50mm, emission of CO was reduced about 50ppm remarkably.

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A Study on the Costume of Musicians in Baekche Gilt-Bronze Incense Burner (백제 금동대향로 주악상 복식 연구)

  • Suh, Mi-Young;Park, Chun-Sun
    • Fashion & Textile Research Journal
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    • v.6 no.1
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    • pp.61-70
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    • 2004
  • The purposes of this study are to understand shapes, characteristics and source on the costume of musicians in Baekche gilt-bronze incense burner. Baekche accepted to incense burner as one of developed culture through exchange with China. Baekche gilt-bronze incense burner includes mixed Thought of Confucian, Buddhism and Taoism from China. The five musicians showed in Baekche gilt-bronze incense burner are symbols that include Confucian Ohang-thought and peaceful reign based on musical combination and arrangement. So, musicians in Baekche gilt-bronze incense burner to pray to God for Happiness showed as a kind of Genii. As a results of analyzing costume of musicians in Baekche gilt-bronze incense burner are as follows; Upper garments which open in the center front have wide sleeves and tie up in high waist position. Under garments are long and wide skirts. Those costume styles of musicians were to follow spreaded costumes in the Continent at that time. In conclusion, costume of musicians in Baekche gilt-bronze incense burner was showed to receive influence of costume style in China Whijinambukjo period.

Traditional Korean Medicine for Treating Bechet's Disease Symptoms of the Upper Burner: A Case Report (베체트병으로 상초(上焦) 부위의 증상을 호소하는 환자에 대한 치험1례)

  • Min, Seonwoo;Moon, Jiseong;Kim, Yeseul;Park, Jiyoon;Hong, Junghwa;Jeong, Ji-Cheon
    • The Journal of Internal Korean Medicine
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    • v.43 no.2
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    • pp.130-143
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    • 2022
  • Objective: This case report presents the effects of traditional Korean medical treatment for a patient with symptoms of the upper burner due to Beçhet's disease. Methods: A 42-year-old male patient was treated with traditional Korean herbal medicine (herbal formulas and patent medicines), acupuncture, and cupping therapy. Neck, ocular, and right wrist pain and xerostomia were assessed daily with a numeric rating scale (NRS) and grading assessment tool for subjective symptoms. Results: For a total of 20 days over two hospitalizations, the patient's neck pain was relieved from NRS 4 to 1, the ocular pain from NRS 5 to 1, the right wrist pain from NRS 7 to 1, and the xerostomia from grade 8 to 1. Conclusion: These results show that Beçhet's disease symptoms of the upper burner can be relieved with traditional Korean medical treatment, although additional well-designed studies are required to confirm these findings.

Flow and Heat Transfer along Burner Positions in Aluminium Pool Furnace (버너의 위치에 따른 알루미늄 용해로내의 유동 및 열전달)

  • Kim, Jin-Ho;Kang, Deok-Hong;Kim, Ki-Hong
    • Proceedings of the KSME Conference
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    • 2004.04a
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    • pp.1207-1212
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    • 2004
  • For the design of Aluminium pool furnace, position of burner and pool depth effects on flow and temperature field in Aluminium pool furnace are examined by the commercial computational code, CFD-ACE+. From the results, position of burner which is on the same face in side wall is better to distribute the flow field in Al furnace. That yields temperature to distribute more uniformly. And the burner position is on upper wall, fire frame reach pool surface. Customer must consider that, because it make Aluminium to oxidize.

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A Study on the Ohguktong(吳鞠通)'s Upper Burner[上焦] in "The Sections of Warm Disease(溫病條辨)" (오국통(吳鞠通)의 "온병조변(溫病條辨)"중(中) 상초(上焦)에 관한 연구(硏究))

  • Kim, Young-Doo;Shin, Seung-Yuel;Cho, Kyung-Jong;Lee, Seok-Jae;Keum, Kyung-Soo;Lee, Si-Hyeong
    • Journal of Korean Medical classics
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    • v.21 no.3
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    • pp.177-258
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    • 2008
  • An Epidemic disease is regarded as warm disease by Korean Medicine. Warm disease is highly contagious and shows an unfavorable condition, and that is characteristic of being widely prevalent. Warm disease study cope with this epidemic disease opportunely. In the Myeong[明] and Cheong[淸] Dynasty, warm disease study got into the region of Korean medicine of today and "The Sections of Warm Disease(溫病條辨)" contributed to the cause of the study was really great. "The Sections of Warm Disease" written by Ohguktong(吳鞠通) in the Cheong Dynasty are divided into the three sections of Upper burner[上焦], Middle burner[中焦] and Lower burner[下焦]. Ohguktong, dealing with the contents of Defense-aspect[衛分], Gi-aspect[氣分], Construction-aspect[營分], Blood-aspect[血分], and so forth in all "Sections of Warm Disease", made use of Seopcheonsa(葉天士)'s Defense Gi[衛氣], Construction, and Blood pattern identification with Triple burner[三焦] pattern identification and six channel pattern identification. And he, having a correct understanding of the nature of medicine, suggested in detail that the directions of medicine and described the processing according to method and the method to take medicine. To conclude, Ohguktong(吳鞠通) Tong in "The Sections of Warm Disease" not only formulated the system of the practical theory of warm disease but also solidified the foundation covering warm disease and its treatment as well, He established the new method of treatment and formula related to warm disease and made a definite distinction between cold damage[傷寒] and warm disease[溫病].

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The study of plant application at flame management system with flame monitoring for pulverized coal firing boiler of thermal power plant (발전용 미분탄 연소 보일러 화염감시장치의 현장적용에 관한 연구)

  • Baeg, Seung-Yeob;Kim, Seung-Min
    • Proceedings of the KIEE Conference
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    • 2004.11c
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    • pp.535-537
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    • 2004
  • The flame image processing and it's analysis system has been developed for optimal coal firing of thermal power plant, especially for reducing NOx and safe operations. We aimed at gaining the relationship between burner flame image, emissions of NOx and LOI(Loss on ignition) in furnace by utilizing the flame image processing methods. And the relationship determines quantitatively the conditions of combustion on the individual burners. The test was conducted on Samchonpo thermal power plant #4 unit(560MW) of KOSEP which has 24 burners. The system simplified the burner adjustment works in accordance with the real time trending of flame behavior like NOx profiles and unburned carbon profiles for individual burners. But, This kind of conventional method increases the cost as the number of burner are increased. Also there is a difficulty to measure exhausted gas of each burner because of measurement errors. This paper intends to propose the useful "Flame Monitoring System" that can find Low NOX and LOI at the upper furnace and to compare with the conventional System.

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A Study on the Yin-Yang Characteristics of Bland Taste (담미(淡味)의 음양(陰陽) 특성에 대한 고찰(考察))

  • Ahn, Jinhee
    • Journal of Korean Medical classics
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    • v.35 no.2
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    • pp.121-141
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    • 2022
  • Objectives : This paper aims to examine the Yin-Yang characteristics of bland taste. Methods : Medicinals including bland taste were searched in herbology textbooks and mainly in the Bencaogangmu, of which major discourses were analyzed to examine the Yin-Yang characteristics of bland taste. Results & Conclusions : Most medicinals with bland taste were sweet-bland-cold, holding properties of cooling heat, stimulating urination and detoxification. These properties could be explained in relation to the Triple Burner's metabolism of Qi and fluids, as they stimulate perspiration and urination, improving the flow of fluids which in turn supports production of Original Qi, by working on the TB's Qi circulation system. In the bland taste discourse, it was understood that bland taste moves the Qi system and produces fluids, by first ascending then descending. Zhudanxi and the Neijing have opposing views on whether bland taste is Yin or Yang, but both saw blandness to have both Yin and Yang qualities. Characteristics of the bland taste could be better understood in relation to the Triple Burner. The phrase 'bland is attached to sweet taste[淡附于甘]' refers to the likeliness between the two tastes in that bland taste has the Central Earth qualities, integrating others and concealing itself in its blandness, its taste unspecific, mild and unstimulating thus communicating the Qi within the entire Triple Burner from Upper to Middle to Lower, as does sweet taste.

Numerical Simulation on the Effects of Air Staging for Pulverized Coal Combustion in a Tangential-firing Boiler (접선연소식 보일러에서 미분탄 연소 시 공기 배분의 영향에 대한 전산해석연구)

  • Kang, Kieseop;Ryu, Changkook
    • Korean Chemical Engineering Research
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    • v.55 no.4
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    • pp.548-555
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    • 2017
  • This study investigated the influence of air staging on combustion and NOx emission in a tangential-firing boiler at a 560 MWe capacity. For air staging, the stoichiometric ratio (SR) for the burner zone was varied from 0.995 to 0.94 while the overall value was fixed at 1.2. The temperature and heat flux in the burner zone and upper furnace corresponded to the distribution of SR, while the total boiler efficiency remained similar. The NOx emission at the furnace exit was reduced by up to 20% when the SR in the burner zone decreased to 0.94. However, the amount of unburned carbon and slagging propensity was not noticeably influenced by the changes in the SR of the burner zone. Therefore, it was favorable to lower the SR of the burner zone for reduction of NOx emission.

The Relativity of Thermography to HRV in Sasang Constitutional Groups (사상인(四象人)의 HRV와 체표온도간 상관성에 관한 고찰)

  • Park, Sun-Young;Kim, Su-Hyun;Chung, Dae-Kyoo;Kim, Ju-Bong
    • Journal of Oriental Neuropsychiatry
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    • v.20 no.3
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    • pp.121-132
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    • 2009
  • Objectives : This study was done to investigate the relativity of thermography to HRV(heart rate variability) in Sasang constitutional groups. Methods : We investigated 87 healthy workers consisted of 10 Taeumin, 47 Soeumin, 30 Soyangin. After diagnosing the Sasang constitution by QSCCII(Questionnaire for the Sasang Constitutional Classification), we ana lysed their HRV -time domain and frequency domain and also checked their thermography in April 2009. Results & Conclusions : Analysing the thermography, The whole skin temperature was showed equaly in many Taeumin, the face, Upper burner skin temperature was showed high in many Soeumin, and the abdomen skin temperature was showed low in many Soyangin. The relativity of the sympathetic index to skin temperature was high in Taeumin. The higher sympathetic index, the higher Upper burner skin temperature in Taeumin, the higer most of the skin temperature in Soyangin, lower the whole skin temperature in Soeumin.

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