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Pump의 생애주기 비용(LCC) 비교 분석 - 물산업 우수제품과 일반제품의 비교를 중심으로 -
박우평,최용,전시영,김진호,강성미,Park, Woopyung,Choi, Yong,Jeon, Si Young,Kim, Jinho,Kang, Seongmi 한국건설관리학회 2022 한국건설관리학회 논문집 Vol.23 No.3
In order to induce users to purchase excellent products in the water industry that satisfy the technical standards of excellent products, in this study, it is to present the advantages of the cost aspect of the pumps as the objective basis. It will be to promote technology development of domestic water companies and to create a virtuous cycle structure in the water industry. In order to present an objective basis for the merits in terms of cost, an economic evaluation was conducted through life cycle cost analysis. For the LCC analysis, initial cost (pump cost and installation cost), operation cost (energy cost and maintenance cost) and demolition cost (disposal cost and residual value) are searched and calculated. As the results of comparison on two capacity of pumps, the energy cost of the excellent pump is 212 million KRW lower than the that of general pump in the large pump. The cost of excellent pump was 17 million KRW lower than that of general pump in small capacity pump. As the results of sensibility test, if the product is developed in the direction of improving pump efficiency and increasing the replacement cycle of consumables, it is predicted that the effect on LCC will be large.
수치해석을 통한 대규모 지하주차장 기계환기 시스템 성능개선 설계방법 개발
박우평(Woo-Pyoung Park),조진균(Jinkyun Cho),김진호(Jinho Kim) 대한설비공학회 2020 설비공학 논문집 Vol.32 No.3
The design improvement of mechanical ventilation systems (which usually operate 24/7 year round) for underground parking lots is critical for human health and energy. In this paper, a mechanical ventilation system was re-designed and improved to solve the problems of ventilation performance and high fan energy use in a large underground parking lots. The inlets/outlets are at the ground level of the building, and the dilution method is used to calculate the required exhaust and supply ventilation rates. Two types of fan room for vent tower models (with sirocco fan and airfoil fan) were constructed and simulated under seven design procedures using computational fluid dynamics (CFD). For the mechanical ventilation of an underground parking lot with an airfoil fan, the ranges of the computed air flow rate and ventilation efficiency are consistent with the requirements of ventilation performance and design criteria. This system optimization procedure of the ventilation system that has been re-designed is effective in meeting the required air flow rate in underground parking lots.
물산업에 사용하는 펌프의 우수제품과 일반제품에 대한 LCC 비교 분석
박우평(Woopyung Park),최용(Yong Choi),전시영(Si Young Jeon),강성미(Seongmi Kand),김진호(Jinho Kim) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
In order to induce users to purchase excellent products in the water industry that satisfy the technical standards of excellent products, in this study, it is to present the advantages of the cost aspect of the pumps as the objective basis. It will be to promote technology development of domestic water companies and to create a virtuous cycle structure in the water industry. In order to present an objective basis for the merits in terms of cost, an economic evaluation was conducted through life cycle cost analysis. For the LCC analysis, initial cost(pump cost and installation cost), operation cost(energy cost and maintenance cost) and demolition cost(disposal cost and residual value) are searched and calculated. As the results of comparison on two capacity of pumps, the energy cost of the excellent pump is 212 million KRW lower than the that of general pump in the large pump. The cost of excellent pump was 17 million KRW lower than that of general pump in small capacity pump. As the results of sensibility test, if the product is developed in the direction of improving pump efficiency and increasing the replacement cycle of consumables, it is predicted that the effect on LCC will be large.
IT전력밀도에 따른 기축 데이터센터의 리모델링을 위한 설비시스템 계획방법에 관한 사례연구
조진균(Cho, Jinkyun),박우평(Park, Woopyeng) 대한건축학회 2022 대한건축학회논문집 Vol.38 No.5
Numerous data centers have been built and operated since 2000. Now that 20 years have passed, a growing need for remodeling that involves shifting to a new IT environment, upgrading IT equipment, and replacing outdated facility infrastructure is escalating. In this study, three basic independent non-IT system modules for a total IT load of 150 kW were derived to respond to low-density, medium-density, and high-density rack-server configurations according to the IT power density known as a key element of a data center. Additionally, a data center’s cooling strategies were analyzed according to its IT power density. As of 2021, the average IT power density of global data centers was surveyed at the level of 7.8-8.4 kW/rack that involved more than 400 samples. Data center cooling was divided into a room-based cooling for low-density, row-based cooling for medium-density, and rack-based cooling for a high-density IT load. Compared to the ALT-1 of a low-density model, the required area was reduced by 30% for the medium-density model and 55% for the high-density model. As a result of the remodeling cost analysis, the cost increased to 105% for the ALT-2 and 119% for the ALT-3 based on the ALT-1 being 100%. The criterion for data center remodeling is to comprehensively consider the required space, cooling energy efficiency, and construction cost based on the IT power density.
고밀도 데이터센터의 에너지 저감을 위한 공조효율 평가방법에 관한 연구
조진균(Cho, Jin-Kyun),박우평(Park, Woo-Pyoung),신승호(Shin, Seung-Ho) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.6
The goal of air management system of high-density data centers is to minimize re-circulation of hot air and minimize by-pass of cold air in the IT server room. Successfully implemented, both measures result in energy savings and better thermal conditions. Air management helps reduce operating costs by enhancing economizer utilization, improving cooling system efficiency. Metrics play an important role in providing a measure of the performance of air management systems. Performance indices include the Supply/Return Heat Index(SHI/RHI), the Rack Cooling Index(RCI) and the Return Temperature Index(RTI). CFD simulation estimates temperature, airflow in the data center and provides a wealth of information for evaluating cooling efficiency. This study describes four performance metrics for analyzing air management systems. They were computed with CFD modeling to evaluate the thermal environment in a typical data center module and 46 different design alternatives. In this paper, advanced and comprehensive evaluation index of cooling efficiency was also derived and well-crafted metrics will undoubtedly play an important role.
코어 위치와 종횡비 및 방위에 따른 건물 에너지 부하 분석
김진호(Kim, Jin-Ho),박우평(Park, Woo-Pyoung),신승호(Shin, Seung-Ho),민준기(Min, Joon-Ki),김동훈(Kim, Dong-Hoon) 한국지열·수열에너지학회 2013 한국지열에너지학회논문집 Vol.9 No.1
In this Study, effect of core position, area ration and orientation of building on energy load is examined using TRNSYS17. This parameters are major parameters of the conceptual design stage. Reference model is square floor plan(1,444m²), centered core and 29% core area ratio. As the results, without considering the building orientation, the annual heating load of central building with 1:1 area ratio is lowest(59.27 kWh/m²yr). As area ratio is bigger, cooling load is lower and heating load is higher. But if we consider building orientation, orders of heating load and cooling load are changed for area ratio and orientation.
그린데이터센터 구현을 위한 공조/냉각 에너지 성능분석 프로그램 개발 및 기후대별 대안평가에 대한 연구
조진균(Cho, Jin-Kyun),박우평(Park, Woo-Pyoung),신승호(Shin, Seung-Ho),이진영(Lee, Jin-Young) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.7
Data centers can consume up to 40 times as much electricity as standard office spaces. In an average data center, 40% of the electricity is consumed by the cooling system. This paper provides an overview of best practices for energy-efficient green data center design which spans the categories of IT environmental conditions, cooling systems. Therefore, the objective of this study is to develop a GDCEET: green data center energy evaluation tool that may be used by engineers and designers to assess the effectiveness and economic benefits of energy-saving cooling system under different climatic conditions. The developed tool is focused on energy consumption characteristics of data center cooling systems. The optimal green data center models were also derived by using evaluation tool and predict the PUE(power usage efficiency) under a wide range of IT operating conditions and different climate. It is anticipated that the developed tool will facilitate the integration of energy efficiency in green data center design and construction.