• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.911-917
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• 2023

In today's world, we find ourselves facing energy crises due to factors such as war and climate crises. To prepare for these energy crises, many researchers continue to study systems related to energy monitoring and conservation, such as energy management systems, energy monitoring, and energy conservation. In line with these efforts, nations are making it mandatory for energy-consuming facilities to implement these systems. However, these facilities, limited by space and energy constraints, are exploring ways to improve. This research explores the operation of a data collection system using low-performance embedded devices. In this context, it proves that an optimized version of RocksDB, a Key-Value store, outperforms traditional databases when it comes to time-series data. Furthermore, a comprehensive database evaluation tool was employed to assess various databases, including optimized RocksDB and regular RocksDB. In addition, heterogeneous databases and evaluations are conducted using a UD Benchmark tool to evaluate them. As a result, we were able to see that on devices with low performance, the time required was up to 11 times shorter than that of other databases.

• Journal of Environmental Policy
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• v.11 no.1
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• pp.75-97
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• 2012

The purpose of the paper is to estimate the functions of the energy input efficiency and the energy intensity efficiency, and measure their energy efficiencies for the reduction of greenhouse gases focusing on OECD countries. The efficiency of the traditional energy intensity was rarely connected with the energy efficiencies of the stochastic frontier function. It seems that the energy efficiency by the function of energy input efficiency sensitively responds to the order of GDP, capital stock, labor, and energy input quantity as explanatory variables. In the future, we need to reduce energy quantities by the optimal mix of inputs, and pursuit low-carbon economic growth through the production of the goods consuming small energy.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.529_530
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• 2009

전통적인 굴뚝산업으로 대표되는 전력산업에서 경쟁과 효율에 입각한 시장경제 지향의 전력산업구조를 선택하게 되는 배경에는 디지털경제 시대의 도래에 따른 정보통신기술의 비약적인 발전과 인터넷을 이용한 e-Business가 전력거래 업무의 주된 흐름으로 정착되고, 효율적인 발전기술의 등장으로 전력산업에 경쟁적인 거래구조의 도입이 가능하기 때문이다. 본 연구에서는 전기에너지 전자상거래를 위한 통합된 포탈시스템(e-Marketplace)의 구축으로 전기에너지 전자상거래(e-Business)의 주요 기능에 부합되는 전력공급입찰, 전력시장가격 조회, 전력거래대금 청구 및 대금결제 서비스를 종합적으로 제공하는 전력거래 e-Marketplace를 구현할 수 있음을 제시하였으며, 전력거래 업무현장에 전기에너지 전자상거래(e-Business) 비즈니스 모델을 적용함으로써 e-비즈니스 전략에 맞는 인프라와 프로세스를 확보할 수 있고, e-비즈니스 추진결과에 따른 전력거래 고객만족도 향상, 비용절감 등 부가가치 증진 요소가 지속적으로 발견될 수 있음을 제시하였다.

• Journal of Korea Water Resources Association
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• v.44 no.10
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• pp.809-817
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• 2011

We analyzed various cost components for approximately 40 small-scale island desalination plants operated by K-water. A significant factor affecting desalination cost was found, and we proposed a way to reduce desalination costs. All plants considered were reverse osmosis (RO) facilities. TDS concentrations of feed water varied from less than 1,000 mg/L (practically considered freshwater) to over 30,000 mg/L (nearly seawater). Analysis of desalination costs from 2005 to 2009 indicated that maintenance, labor, and energy were the three biggest components that accounted for 50.6%, 36.9% and 7.8%, respectively. It was well known that TDS of feed water directly affected energy needed for RO process. In this study we found that maintenance cost was also directly related to feed water TDS. This finding indicated that lowering feed water TDS might result in significant desalination cost reduction.

• Journal of the Korean Wood Science and Technology
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• v.44 no.5
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• pp.655-663
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• 2016

Increasing green house gas and it consequent climate change problems are discussed as a global issue. Accordingly, future local green house gas emission will increase up to 40% of the entire local green house gas emission and therefore, efforts to reduce the emission in construction industry is urgently required. Therefore, in this study, heating energy demand was analyzed by using the EnergyPlus simulation according to wood material finishes configuration. EnergyPlus has the entry for a variety of buildings and heating, ventilation, air conditioning (HAVC) system components, in particular buildings, air conditioning systems, and performs simultaneous integrated calculated through the feedback between the heat source unit, a verification program according to the ASHRAE Standard 140-2007 to be. The climate data for the simulation we used the data IWEC in Incheon and Gwangju provided by EnergyPlus. The analysis of simulation model was farm and fishing house standard design drawings: 2012, presented at the Korea Rural Community Corporation. The results of simulation of central region and southern region were effected by wood products of simulation model into the interior finish, exterior finish, windows, wooden structure. Also, it was confirmed that the reduced heating energy demand.

• Information and Communications Magazine
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• v.27 no.4
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• pp.31-37
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• 2010

본고에서는 그린 ICT기반의 에너지 효율 향상과 $CO_2$ 배출절감을 목표로 스마트그리드 시스템을 구축함에 있어, 성공적인 시스템 구축을 위하여 표준의 필요성에 대하여 소개하고 표준을 기반으로 스마트그리드 시스템 설계 전략과 한국형 스마트그리드 구축을 위한 5대 전략서비스에 대해 자세히 살펴본다. 스마트그리드 시스템을 원활히 진행하기 위하여 스마트그리드 시스템 구성 요소간 상호 호환성 제공이 필요하며 이를 위하여 IT 인프라 기술인 통신, 정보 기반의 상호 호환성 제공 기술을 간략하게 소개한다. 그리고 통신기반의 상호 호환성 제공을 위한 인터넷 프로토콜과 통신네트워크 기술에 대하여 자세히 살펴본다.

• Proceedings of the Korean Society Of Semiconductor Equipment Technology
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• 2004.05a
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• pp.253-258
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• 2004

21C 정보화시대를 맞이하여 반도체 산업이 급속하게 발전함에 따라 컴퓨터를 활용한 효율성이 높은 유틸리티 관리 시스템(New Utility Management System) 기술이 중요시되는 추세이다. 본 연구에서는 유틸리티 관리시스템의 한 부분인 냉수 시스템에 대해 정상상태 유동해석을 통하여 각 구성 요소에서의 유량 및 압력, 온도를 제공할 수 있는 컴퓨터해석시스템을 구현하였다. 효율성 증대를 위해 펌프 위치에 따른 시스템 변화를 파악하여 시스템에 영향을 크게 미칠 수 있는 펌프 즉, 가동하면 효율적인 펌프를 결정하였으며 최적의 리턴라인(Return Line) 위치를 설계하였다. 이 결과는 운전 및 관리의 효율성 증대와 에너지 절감을 위하여 매우 유익한 활용이 가능하다.

• KIEAE Journal
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• v.15 no.4
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• pp.77-84
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• 2015

Purpose: In 2008, As the green growth policy was presented, Green Building is made any effort to propagation. In this paper, the respective technologies that are able to considerably reduce the energy demands for heating, cooling, hot-water, lighting and ventilation among the variety of technologies were selected. Method: Design factors such as (1) External insulation, (2) Triple glazing window, (3) LED lighting, (4) External venetian blind, (5) Geothermal and (6) Heat recovery ventilator were derived. In addition, energy saving effects in terms of energy demand, energy consumption and energy cost were investigated using EnergyPlus, building energy analysis tool. Result : The results were as follows. (1) It can be seen that high insulated triple glazing window, heat recovery ventilator and external insulation technology is excellent for energy demand. (2) Unlike energy demand, saving effect of energy consumption and energy cost was shown in order of Geothermal > Triple Window > Heat recovery Ventilation> Insulation> LED Lighting > EVB Blind.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.1
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• pp.147-152
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• 2018

This study investigates the demand management and energy saving plan of the apartment house based on the ESS (: Energy Storage System), which is the main equipment in the field of electric power energy efficiency, and suggests standardization for various technical factors and operation. It contributes to the spread of ESS industry. In addition, to create ESS market for apartment houses and smart homes, housing IoT technology is used to integrate apartment houses with smart home-based ESS and it is possible to achieve use efficiency and economic feasibility of power users, We will study a business model that can reconsider the acceptability of power users.

• Smart Media Journal
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• v.7 no.2
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• pp.71-77
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• 2018

This paper proposes the components of the energy management system (EMS) for optimum operation of renewable energy and associated energy storage system (ESS), the functions to be considered in designing, the analysis of operational effects, and finally the reduction of electricity costs. To accomplish the objectives, a lithium-ion battery system and an energy management system have installed in a PV system, and it presents the results analyzed with operation data for a year. To increase the system operation efficiency, we propose the effect that EMS is used to replace the demand power at the peak time with the charge power at the light load time, which suggests the influence of contributing to the charge benefit and load leveling according to the ESS tariff.