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수직형 복합 연삭시스템 베드의 동특성 해석에 관한 연구
최승건(Seung-Geon Choi),김성현(Seong-Hyun Kim),최웅걸(Woong-Kirl Choi),신현정(Hyun-Jung Shin),이은상(Eun-Sang Lee),김규동(Kyu-Dong Kim) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.5
Machine tools are the cores of industrial development in recent period. It is difficult to develop a system which can do cutting and grinding process in the one system. Hybrid Vertical Grinding System is capable of processing in a single apparatus cutting or grinding. The modal analysis and structural analysis for the development of Hybrid Vertical Grinding System is the first time of domestic work. In this study, Hybrid Vertical Grinding System bed was designed and analyzed by using SS401 and FC300 as materials. And by using Finite Element Methods, the design and material of the bed was analysed. Finally, we can make a better choice of structure and material of the bed by comparing the analysis results.
Study on the Operation of the Solar Heating System with Ground Source Heat Pump as a Back-up Device
김휘동(Kim, Hwidong),백남춘(Baek, Namchoon),이진국(Lee, Jinkook),신우철(Shin, Uchul) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
The study on the operation characteristics of solar space and water heating system with ground source heat pump (GSHP) as a back-up device was carried out. This system, called solar thermal and geothermal hybrid system (ST/G), was installed at Zero Energy Solar House II (KIER ZeSH-II) in Korea Institute of Energy Research. This ST/G hybrid system was developed to supply all thermal load in a house by renewable energy. The purpose of this study is to find out that this system is optimized and operated normally for the heating load of ZeSH-II. Experiment was continued for seven months, from October to April. The analysis was conducted as followings ; - the contribution of solar thermal system. - the appropriateness of GSHP as a back-up device. - the performance of solar thermal and ground source heat pump system respectively. - the adaptation of thermal peak load - the operation characteristics of hybrid system under different weather conditions. Finally the complementary measures for the system simplification was referred for the commercialization of this hybrid system.
태양광열 · 지열 하이브리드 시스템의 적정 용량 설계를 위한 동적 에너지 시뮬레이션
정용대(Jeong, Yong-Dae),남유진(Nam, Yujin),여성구(Yeo, Seong-gu) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.7
Recently, the ground source heat pump (GSHP) system is actively used because it has high performance of system comparing with other conventional systems. However, the systemic performance can decrease due to excessive and prolonged operation periods. This problem can be solved by combining with other heat source systems. In this research, a hybrid system with GSHP and PVT (Photovoltaic-Thermal) system was proposed and the analysis of system performance was conducted. The analysis model was made by TRNSTS17 and annual performance was calculated based on hourly system performance and weather data. In this paper, in order to decide suitable system capacity between GSHP and PVT, case studies was conducted according to the capacity change of individual system. The simulation was carried out considering various building conditions and local conditions. In the results, a hybrid system can achieve 15.5% higher performance at most than only GSHP system.
콤팩트형 태양열/지열히트펌프 하이브리드 냉난방 및 급탕 시스템 개발 및 성능분석
백남춘,정선영,윤응상,이경호 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.5
In this study, the compact type solar thermal and ground coupled heat pump hybrid system for space heating/cooling and hot water supply has been developed. This hybrid system was installed in Zero Energy Solar House(ZeSH) in KIER for the demonstration. The thermal performance and operational characteristics of this hybrid system were analysed especially. The results are as follows. (1) This hybrid system was designed in order to address the existing disadvantages of solar thermal/ground coupled heat pump system. For this design, all parts except solar collector and ground coupled heat pump were integrated into a single product in a factory. The compact type unit includes two buffer tanks, an expansion tank, pumps, valves, a controller, etc. This system has an advantage of easy installation with simple plumbing work even in narrow space. (2) The thermal charging and discharging time of the buffer tanks and its characteristics by ground coupled heat pump, and heat pump COP according to geo-source temperature and buffer storage temperature have been studied. This system was found to meet well to the heat load without any other auxiliary heating equipment. (3) The operating hours of the ground coupled heat pump as a backup device of solar thermal can be reduced significantly by using solar heat. It was also found that the minimum heating water supply setting temperature and maximum cooling water supply setting temperature make an influence on the heat pump COP. The lower heating water and the higher cooling water temperature, the higher COP. In this respect, the hybrid system’s performance can be improved in ZeSH than conventional house.
황인주,우남섭,이홍철 대한설비공학회 2006 설비공학 논문집 Vol.18 No.3
The present study concerns the annual performance evaluation of a hybrid- renewable energy system with geothermal and solar heat sources for hot water, heating and cooling of the residential buildings. The hybrid energy system consists of ground source heat pump of 2RT for cooling, solar collectors of 4.8m2, storage tank of 250liters and gas fired backup boiler of 11.6kW. The averaged coefficients of performance of geothermal heat pump system during cooling and heating seasons are measured as 4.1 and 3.5, respectively. Also solar fraction for hot water is measured as 35percent. Overall, the results shows that the hybrid-renewable energy system satisfactorily operated under all climatic conditions.
김수종(Soojong Kim),김기훈(Gihun Kim),조정태(Jungtae Cho),조민경(Minkyoung Cho),도규성(Gyusung Do),소정수(Jungsoo So),허준영(Junyoung Heo),이정표(Jungpyo Lee),박수향(Suhayng Park),문희장(Heejang Moon),성홍계(Honggye Sung),김진곤(Jinkon 한국추진공학회 2008 한국추진공학회 학술대회논문집 Vol.2008 No.11
하이브리드 로켓엔진의 연소시험을 수행하기 위해 시험 설비를 제작하고 지상연소시험장을 구축하였다. 연소시험장 설비는 하이브리드 로켓엔진, 추력 시험대, 산화제 저장 및 공급 장치, 제어 장치, 데이터 획득 장치로 구성되었다. 추력 50 kgf 급의 연소 시험을 수행하여 안정적으로 성능 데이터를 획득할 수 있었으며, 연소시험장 설비의 작동 신뢰성을 확인하였다. Ground firing test facility and test field for firing test of hybrid rocket engine were constructed. Ground firing test facility were composed of hybrid rocket engine, thrust stand, oxidizer storage/supply system, control system and data acquisition system. Firing tests of thrust 50 kgf class were conducted. Stable performance data was obtained and operational reliability of ground firing test facility were found.
병원 건물에 설치된 냉각탑 병용 지열 히트펌프 시스템의 냉방 성능
손병후(Byonghu Sohn),이두영(Doo-Young Lee),민경천(Kyung-Chon Min) 한국지열·수열에너지학회 2016 한국지열에너지학회논문집 Vol.12 No.1
This paper presents the measurement and analysis results for the cooling performance of ground-coupled heat pump (GCHP) system using a cooling tower as a supplemental heat rejector. In order to demonstrate the performance of the hybrid approach, we installed the monitoring equipments including sensors for measuring temperature and power consumption, and measured operation parameters from May 1 to October 30, 2014. The results showed that the entering source temperature of brine returning from the ground heat exchanger was in a range of design target temperature. Leaving load temperatures to building showed an average value of 11.4°C for cooling season. From the analysis, the daily performance factor (PF) of geothermal heat pumps ranged from 4.4 to 5.2, while the daily PF of hybrid GCHP system varied from 3.0 to 4.0 over the entire cooling season.
The Study on the Energy self-sufficiency and Economic Analysis of KIER Zero Energy Solar House
정선영(Jeong, Seonyeong),백남춘(Baek, Namchoon),유창균(Yoo, Changkyoon),윤응상(Yoon, Eungsang),윤종호(Yoon, Jongho) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
In this study, the energy and economic analysis of KIER Zero Energy Solar House (KIER ZeSH) was carried out. KIER ZeSH was designed and constructed in the end of 2009 for the purpose of more than 70% energy self-sufficiency in total load as well as less than 20% of additional construction cost. The several building energy conservation technologies like as super insulation, high performance window, wast heat recovery system, etc and renewable energy system. The renewable heating and cooling system is a kind of solar thermal system combined with geo-source heat pump as a back-up device. The capacity of 3.15kW solar BIPV system was also installed on the roof. The measurement by monitering system of ZeSH was conducted for one year from November 2009 to October 2010. The energy self-sufficiency and economic analysis were conducted based on the this monitering result. As a result, the energy self sufficiency is about 83% which is higher than that of the target and the payback period is 11 years.
제로에너지 솔라하우스(KIER ZeSH-Ⅱ)의 에너지성능 측정 및 에너지자립도 분석
정선영(Jeong, Seon-Yeong),백남춘(Baek, Nam-Choon),윤종호(Yoon, Jong-Ho),신우철(Shin, U-Cheul),김용경(Kim, Yong-Kyoung),강승훈(Kang, Seung-Hoon) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.12
In this study, the performance measurement and energy analysis of KIER Zero Energy Solar House (KIER ZeSH-Ⅱ) was carried out. KIER ZeSH-Ⅱ was designed and constructed in the end of 2009 for the purpose of more than 70% energy self-sufficiency in total load as well as less than 20% of additional construction cost. The several building energy conservation technologies like as super insulation, high performance window, waste heat recovery system, etc and renewable energy system. The renewable heating and cooling system is a kind of solar thermal system combined with geo-source heat pump as a back-up device. The capacity of 3.15㎾p solar BIPV system was also installed on the roof. The measurement by monitoring system of ZeSH-Ⅱ was conducted for one year from January 2010 to December 2010. The energy self-sufficiency and economic analysis were conducted based on the this monitoring result. As a result, the energy self sufficiency is about 94% which is higher than that of the target. The results proved that commercial possibility of next generation Zero Energy Solar House.