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Analysis on Heating Effects of the Vertical Type Geothermal Heat Pump System
강연구,류영순,장재경,김영화 한국농업기계학회 2014 바이오시스템공학 Vol.39 No.2
Purpose: This paper is aimed at analyzing the heating performance of the vertical closed loop type Geothermal Heat PumpSystem (GHPS) distributing the farm site and providing basic data of the GHPS. Method: Seedling greenhouse heating wasmade from October 2012 to May 2013. The seedling greenhouse was divided into 4 sectors (A, B, C and D zone, total 3,300m2) with different temperatures. It was heated from 5PM to 8AM, and during the night the greenhouse was covered bynon-woven fabric thermal curtains along the upper 2m of the greenhouse for temperature maintenance. In order to analyzethe heating performance of the GHPS, power consumption and operating time of the GHPS, inlet and outlet watertemperature of the condenser, temperatures of each zone of the greenhouse, and ambient temperature were measured. Results: When operating only one heat pump unit, heat generated in the condenser decreased as the experiment progressedand power consumption increased correspondingly. However, the heating coefficient of performance decreased from 3.3 to2.0 rapidly. Also, when operating two heat pump units, heat generated in the condenser decreased and power consumptionincreased. Heating coefficient of performance decreased from 4.5 to 3.7 rapidly. When the set temperature of thegreenhouse was 13.7~20.1°C and minimum ambient temperature was -20.8~4.8°C, the annually accumulated heat andpower consumption were 520,623 kW, 142,304 kW, respectively. Conclusion: When the set temperature of the greenhousewas 13.7~20.1°C and the minimum ambient temperature was 20.8~4.8°C, the annually accumulated heat and powerconsumption were 520,623 kW, 142,304 kW, respectively. When operating only one heat pump unit, the heating COP was2.0~3.3, and when operating 2 heat pump units, it was 3.7~4.5. If several heat pumps are installed in one GHPS, it issuggested that all heat pumps be operated except in special cases. Because the scale of the water pumps are set to the scaleof when all heat pump units are operating, if even one unit is not operating, the power consumption will increase. Thatbecomes the cause of COP decrease.
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정국삼,류영순 한국산업안전학회 1994 한국안전학회지 Vol.9 No.3
The purpose of this study is to compare the combustability of the formed high density polyethylene (HDPE) with the low density polyethlyene(LDPE). That is, the easiness of ignition is examined by using the methods with Oxygen Index(OI) Tester and ventilation parameter, and the combustion velocity of these potyethylenes is measured by changing the size and shape of opening area. As the result of it, the oxygen index of HDPE, in a ignition, is required more than LDPE. Then, the concentration distribution of CO by combustion is increased when the opening area is small, but, in the same opening area, LDPE tends to increase more than HDPE. In addition, as the ratio of height to width of opening area is increased, combustion velocity becomes faster relatively. In consequence, when it is generally considered, the combustability of LDPE is better than HDPE.
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중국 용정지방 달라재 전통농가 정지간과 생활행위 조사연구
고도임,윤복자,박남희,류영순 한국주거학회 1997 한국주거학회 논문집 Vol.8 No.3
This paper is a part of “The Study of The Traditional Korean Ethnic Farmhousing in Yanbian. China. The purpose of this study is to investigate the activities of the chung-ji-kan(the combined kitchen and major ondol living room). of the traditional farmhouse. It is based on a survey of 124 households in the farm villages of Lungching, China. Survey research methods included a field study in Dallajae. A questionnaire was used to conduct this study. The major findings are: 1) the average family is 3.25 persons and the nuclear family type is prevalent; ) the building plan of the farmhouse is the Ham-Kyoung-Do ‘double file’ dwelling type, the average 5.2kan(51.1$m^2$) house; ) the chung-ji-kan floor changed from straw matting or seomyu-pan(a kind of veneer board) to a vinyl flooring; 4) the chung-ji-kan ondol is the important center of activities for the farm family; thus the sitting life style of Korean ondol culture continues in Yanbian, China.
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