신형 수이젝터 개발을 위한 실험연구

문수범,최현규,최재혁,권형정,김경근,최순호,Mun, Soo-Bum,Choi, Hyun-Kue,Choi, Jae-Hyuk,Kwon, Hyung-Jung,Kim, Kyung-Keun,Choi, Soon-Ho 한국마린엔지니어링학회 2006 한국마린엔지니어링학회지 Vol.30 No.6

An ejector is a fluid transfer device to be used for mixing of fluids, maintaining vacuum, and overcoming a poor suction condition. To date, most ejectors have been made from the casting process. which is time-consuming and high-cost process. Therefore, a new production method of ejectors is desired if any. In this experimental study, we proposed a new type ejector manufactured from the commercial fitting materials and the welding process, which is equipped with an orifice type nozzle. The proposed ejector has a good integrity compared with the conventional ejector because the fittings have manufactured by forging and they have more strength than the casting materials. Furthermore we adopted a multi-opening orifice type nozzle for improving a suction capacity and compared with a single-opening orifice type nozzle. From the experimental results. we confirmed that the multi-opening nozzle had a food suction capacity than the single-opening nozzle and the proposed new type ejector showed higher vacuum than the conventional type ejector in non-load condition. These improved characteristics suggests that a new type ejector by using the commercial fittings opens the feasibility to be adopted in various industry fields and that the increased suction capacity can be achieved by altering the nozzle design of a conventional ejector.

저온의 고-액상변화 모듈 용기의 배열에 따른 축냉시스템의 수치해석

문수범,Mun, Soo-Beom 해양환경안전학회 2015 해양환경안전학회지 Vol.21 No.5

This paper is the fundamental study for the application of cold storage system to the transportation equipment by sea and land. This numerical study presents the solid-liquid phase change phenomenon of calcium chloride solution of 30wt %. The governing equations are 1-dimensional unsteady state heat transfer equations of $1^{st}$ order partial differential equations. This type of latent heat storage material is often usable in fishery vessel for controlling the temperature of container with constant condition. The governing equation was discretized with finite difference method and the program was composed with Mathcad program. The main parameters of this solution were the initial temperature of heat storage material, ambient temperature of cold air and the velocity of cold air. The data of boundary layer thickness becomes thin with the increasing of cold air flowing velocity and also the heat storage completion time become shorten.

고품질 수산 건제품의 건조열전달에 관한 연구

문수범(Soo-Beom Mun),김경석(Kyong-Suk Kim),이춘화(Choon-Wha Lee),김경근(Kyung-Kun Kim),오철(Chul Oh),배창원(Chang-Won Bae) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회지 Vol.34 No.4

In spite of the global-class aquaculture and fishing technology of our country, the processing technologies are lags behind the other nations relatively. The processed marine products are mainly frozen foods, canned goods, salty food (fermented fish products), fish paste products (boiled fish paste), and we can see that the high-value dehydrated foods by drying are very few. These problems are considered to be caused directly by the lack of drying technologies. This paper is concerned to the experimental results of drying heat transfer characteristics for the green energy type vacuum dryer for the high quality sea foods production.

신형 수이젝터 개발을 위한 실험연구

문수범(Soo Beom Moon),최현규(Hyun Kue Choi),최순열(Soon Yeol Choe),김창복(Chang fu Jin),김경근(Kyung Kun Kim),최순호(Soon-Ho Choi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6

An ejector driven by a liquid is a fluid transfer equipment to be used for mixing, for maintaining vacuum, and for overcoming a poor suction condition. At present, most ejectors have been made from the casting process, which is time and cost consuming process. Therefore, a new production method is desired to produce a ejector massively. In this experimental study, we proposed a new type ejector produced from the commercial fitting materials and the welding process with an orifice type motive nozzle. The proposed ejector has a good integrity compared with the conventional ejector because the forging materials of the fittings has more strength than the casting materials. Furthermore, we adopted a multi-opening orifice type nozzle for improving a suction capacity and compared with a single-opening orifice type nozzle. From the experiments, we confirmed that the multi-nozzle had a good suction capacity than the single nozzle and the proposed new type ejector showed higher vacuum than the conventional type ejector in non-load condition. These improved characteristics of a new type one suggests a new manufacturing method to produce an ejector by using the commercial fittings. Therefore, the proposed ejector in this study can considerably reduce the manufacturing time and cost while its performance is largely increased.

저온진공건조기를 이용한 고추의 열적특성에 관한 연구

문수범(S. B. Moon),최두열(D. Y. Choi),이정혜(J. H. Lee),김경근(K. K. Kim),최순열(S. Y. Choi) 대한설비공학회 1999 대한설비공학회 학술발표대회논문집 Vol.1999 No.-

시료 두께에 의한 저온진공건조기의 열적 특성에 관한 연구

최순열,문수범 한국마린엔지니어링학회 2002 한국마린엔지니어링학회지 Vol.26 No.2

In tradition, there have been two kinds of drying methods, which are sun drying and artificial drying. The sun drying method which has been adopted traditionally has been replaced by the hot-air drying method which is one of the most general methods of artificial drying, with its simple drying system, low initial cost of drying plant, and easy operating method. But the hot-air drying method has some defects ; (1)much energy loss happens due to the discharge of hot air during the drying process, (2)control of drying rate is not easy on account of changing relative humidity of inlet air for uniform hot air temperature, (3)high temperature of floods in drying process brings about the production of low-grade drying products. Also, the hot-air drying method is inducing environmental and sanitary problems which are resulting from the emission of high temperature and high humidity air, including stick on the drying progress. Vacuum drying technique, whose drying time and 7uantity of exhausting energy is about 1/3 ~1/4 of hot air drying, is very excellent in the drying efficiency. As the results, it took about 20 hours for material to reach about 18% of the final moisture content in order to store products for a long time, from about 470% of the early moisture content at the beginning of drying, and maximum drying rate comes to about $0.35 kg/m^2hr$ at about 350% of the moisture content.

진공해동장치에 의한 동결식품의 해동열특성

김호영(Ho-Young Kim),문수범(Soo-Beom Moon),최두열(Du-Yul Choi),김경근(Kyung-Kun Kim) 대한설비공학회 2000 대한설비공학회 학술발표대회논문집 Vol.2000 No.-

생체 건조용 대형 저온진공건조기의 열적 특성에 관한 연구

김경근,성부용,정한식,최순열,문수범 한국마린엔지니어링학회 2000 한국마린엔지니어링학회지 Vol.24 No.4

In tradition, there have been two kinds of drying methods, which are sun drying and artificial drying. The sun drying method which has been adopted traditionally has been replaced by the hot-air drying method which is one of the most general methods of artificial drying, with its simple drying system, low initial cost of drying plant, and easy operating method. But the hot-air drying method has some defects; (1) much energy loss happens due to the discharge of hot air during the drying process, (2) control of drying rate is not easy on account of changing relative humidity of inlet air for uniform hot air temperature, (3) high temperature of foods in drying process brings about the production of low-grade drying products. Vacuum drying takes advantage of energy saving and mass production because it reduces the drying time by increasing the drying rate under low temperature condition. The aim of this paper is to develop the low temperature vacum dryer, with low initial investments and operating costs, easy operating method and trouble-free operation.

단열층을 가지는 솔라 폰드의 수치해석

유직수(Jik-Su Yu),문수범(Soo-Beom Mun) 한국마린엔지니어링학회 2016 한국마린엔지니어링학회지 Vol.40 No.4

This paper reports a fundamental study of temperature characteristics of a solar pond with an insulation layer. Further, these characteristics were compared with those of a solar pond without the insulation layer. The governing equation was discretized via finite difference method. The governing equations are two-dimensional unsteady-state second-order partial differential equations. The conclusions of the study are as follows: 1) If the depth of the solar pond was increased, the desired effect of increase in temperature was not produced because the amount of solar insolation received by the bottom of the solar pond decreased. 2) As the temperature of the soil during winter is higher than the temperature of the water in a solar pond, heat was transferred from the soil to the solar pond. 3) For the case of the solar pond with insulation layer, it was estimated that the dependence rate of solar energy was 83.3% and that of the boiler was 16.7%.

진공열전달기술에 의한 해수의 종합자원화에 관한 연구

소예덕(Yude Shao),문수범(Soo-Beom Mun),김경근(Kyung-geun Kim),최부홍(Bu-Hong Choi),이서연(Seo-Yeon Lee) 한국마린엔지니어링학회 2015 한국마린엔지니어링학회지 Vol.39 No.7

Mud, iron oxide, plaster, salt, minerals, and dissolved metals are sequentially deposited in accordance with the increasing concentration of seawater. In this paper, by using the physical characteristics of the seawater, we propose a new vacuum heat-transfer technology to subsequently obtain the proportion of the dissolved components in a cost-effective manner. Based on the vacuum heat-transfer characteristics of seawater, we comprehensively divide the seawater resource processes into the following four processes: (1) the salt concentration process to the saturation concentration, (2) crystallization process for salt formation, (3) mineral precipitation, and (4) remaining of dissolved metals.