• Title, Summary, Keyword: Energy-saving

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Energy Saving Characteristics of OSPF Routing Based on Energy Profiles (Energy Profile에 기반한 OSPF 라우팅 방식의 에너지 절약 특성)

  • Seo, Yusik;Han, Chimoon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.40 no.7
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    • pp.1296-1306
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    • 2015
  • Nowadays the research of energy saving on the IP networks have been studied the various methods in many research institutes. This paper suggests the energy saving method in IP networks which have the various energy profiles, and analyzes its energy saving characteristics in detail. Especially this paper proposes the energy profile based OSPF routing method which have the selectable weighted value in OSPF metric and energy consumption in IP network. This paper analyzes the energy saving effects of the various situations to minimize the energy consumption using the various weighted value on the proposed scheme. The results show that the energy saving efficiency can get about 67% at in ingress input load ${\rho}=0.5$ by using random energy profiles in IP networks. Although the number of hops is a slight increased due to routing the paths for the minimum energy consumption in the algorithm of this method, the increment hop number is limited the mean 1.4 hops. This paper confirms that the energy profile of core router has the large effects of energy saving than the energy profile of edge router, and the proposed method has the excellent energy saving characteristics in IP networks.

Energy Performance and Improvement in University Library - Concentrated on 'K'University Library located in Seojong City -

  • Roh, Ji Woong
    • KIEAE Journal
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    • v.14 no.4
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    • pp.47-52
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    • 2014
  • The problem of energy consumption is more serious in university buildings than primary, middle and high school buildings. Because university buildings have generally heating and cooling systems, and various incidental facilities. In university, the library is one of the building that many people use and the most energy is spent. So, investigation on energy saving is very important and urgent. This study aims finally to present the guideline for low-energy design of University library by aiding a designer to select best solution in the side of energy-saving. In this paper, composition of space, utilization schedule and performance of construction materials are grasped, some primary factors that effect to energy saving are analyzed by energy simulation. The result of this study is as follows; First, the subject library has more cooling load than heating load because of cooling load generated during middle season. Second, green roofs is the most effective to heating load saving, but not to cooling energy. Third, outdoor air cooling is the most effective to cooling energy saving among the investigated strategies included in this study.

The Effect of Energy-Saving Investment on Reduction of Greenhouse Gas Emissions (에너지절약투자의 온실가스 배출 감소 효과)

  • Kim, Hyeon;Jeong, Kyeong-Soo
    • Environmental and Resource Economics Review
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    • v.9 no.5
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    • pp.925-945
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    • 2000
  • This paper analyses the impact of energy-saving investment on Greenhouse gas emissions using a model of energy demand in Korea. SUR method was employed to estimate the demand equation. The econometric estimates provide information about the energy price divisia index, sector income, and energy saving-investment elasticities of energy demand. Except for energy price divisia, the elasticities of each variable are statistically significant. Also, the price and substitution elasticities of each energy price are similar to the results reported by the previous studies. The energy-saving investment is statistically significant and elasticities of each sector is inelastic. Using the coefficient of energy-saving investment and carbon transmission coefficient, the amount of reduction of energy demand and the reduction of carbon emissions can be estimated. The simulation is performed with the scenario that the energy-saving investment increase by 10~50%, keeping up with Equipment Investment Plan of 30% increase in energy-saving investment by 2000. The results show that the reduction of energy demand measured as 11.2% based upon 1995's level of the energy demand, in industrial sector. Accordingly, the carbon emissions will be reduced by 11.3% based upon 1995's level of the carbon emissions in industrial sector.

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An Energy Performance Comparison of University Lecture Facilities for Energy Saving Building Design (에너지 절약형 건축물 설계를 위한 대학 강의동 형태별 에너지 성능 비교에 관한 연구)

  • Kim, Tae-Hoon;Seo, Ji-Hyo;Choo, Seung-Yeon
    • Journal of the Architectural Institute of Korea Planning & Design
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    • v.34 no.11
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    • pp.105-112
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    • 2018
  • Global environmental problems are growing, and the importance of buildings with high energy consumption has been emphasized. In Korea, the Ministry of Land, Transport and Maritime Affairs has been promoting the mandatory zero energy building since 2020, and guidelines related to the zero energy building have been developed. In addition, based on the "Energy-saving Design Criteria for Buildings" of the "Green Building Promotion Act" in Korea, the standards for energy-saving design are specified and the energy saving plan is written. Besides, the 'Energy-saving construction standards for eco-friendly houses' also specify insulation, machinery, equipment, and sunshade. Also, there is little consideration about the cost such as construction cost and material cost which should be considered important in the construction stage. Therefore, this study aims at analysis of building type and energy performance versus materials for energy saving building design considering energy performance in planning aspect of initial design stage. In this study, because the variables can not be neglected in this study, it is selected as the lecture facility of the 'K' university campus building which can consider the remaining factors except the passive design element as the control variable, Energy performance analysis.

Development of the New Energy Saving Device for the Reduction of Fuel of 176k Bulk Carrier (176k Bulk Carrier의 연료저감을 위한 새로운 Energy Saving Device 개발)

  • Song, Hyun-Jin;Kim, Moon-Chan;Lee, Won-Joon;Lee, Kyoung-Wan;Kim, Ji-Hee
    • Journal of the Society of Naval Architects of Korea
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    • v.52 no.6
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    • pp.419-427
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    • 2015
  • Recently Energy Saving Device has been developed actively due to the regulation of the EEDI. This Energy Saving Device which is newly developed is integrated duct and stator. This paper verified performance of the Energy Saving Device through CFD. The experimentation to find the best pitch angle of each blade of the stator designed has been conducted. The angle of incidence of the duct has been obtained through the measurement of the wake. The experimentation has been carried out with and without Energy Saving Device. The efficiency increase was through these two experiments.

Analysis on the Characteristics of Energy Use Behaviors and Energy Saving Consciousness of Multi-family Housing Residents (공동주택 거주자의 에너지 사용행태 및 에너지 절약의식 분석)

  • Lee, Youn-Jae;Lee, Hyun-Soo;Park, So-Yun
    • Journal of the Korean housing association
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    • v.22 no.6
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    • pp.31-42
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    • 2011
  • The purpose of the study was to investigate the characteristics of energy use behaviors and energy saving consciousness of multi-family housing residents. The energy referred to in this study includes electric energy, heating energy and water usage. This study was conducted from a survey carried out in Seoul and Gyeonggi-do. The results of the study are as follows: First, among the survey questions, the only positive energy saving behaviors shown by the occupants was turning off the lights and the television, and in the use of kitchen appliances; it could therefore be concluded that, in general, energy saving attitude and consciousness were not sufficient to reduce energy consumption. Second, the results showed high mean scores for the behaviors which were easy to control, such as turning off lights and televisions, and low mean scores for the behaviors which required extra effort to completely cut off electricity energy such as pulling out the plugs of electronic appliances. Third, it was found that the occupants generally showed the tendency to save heating energy. However, in cases where the occupants were required to continuously and directly experience indoor temperatures, they expressed passive attitudes toward saving energy. Fourth, they showed wasteful attitudes toward water usage by leaving the tap running when taking showers and washing their faces. Fifth, while they showed a strong energy saving consciousness, they also showed a passive attitude about putting this into practice; there was therefore some gap between attitude and behavior. Lastly, among the socio-demographic factors, age and family lifecycle were very important factors affecting energy use and energy saving consciousness.

Evaluation of Energy Savings for Inverter Driving Centrifugal Pump with Duty Cycles (인버터 구동 원심펌프의 급수 사용율에 따른 에너지 절감 평가)

  • Kim, Kyungwuk;Suh, Sang-Ho;Rakibuzzaman, Rakibuzzaman
    • The KSFM Journal of Fluid Machinery
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    • v.18 no.6
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    • pp.81-85
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    • 2015
  • The purpose of this study is to evaluate energy savings for inverter driving multi-stage centrifugal pump. Variable speed driving pump system has high efficiency compared with constant speed driving pump system. Because of difficulty to estimate operating efficiency of variable speed driving pump system, energy saving rates are used to replace operating efficiency. energy saving rates are calculated from pump input power and pump duty cycle. But another researches have used pump duty cycles of each season for energy saving rate. In this study, for estimating energy saving rate more high accuracy, pump duty cycles are measured for 1 year. pump duty cycles, depending on the season and be classified according to the weekday/weekend or during the week day. By this pump duty cycles, Energy saving rate is calculated appropriately.

A Study on Control and Monitoring System for Building Energy Management System

  • Oh, Jin-Seok;Bae, Soo-Young
    • Journal of the Korean Society of Marine Engineering
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    • v.35 no.3
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    • pp.335-340
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    • 2011
  • Building energy saving is one of the most important issues in these days. Control algorithm for energy saving should be designed properly to reduce power consumption in building. Recently, building energy system consists of hybrid energy system coupling with RE (Renewable Energy) source. In this paper, an optimum control algorithm for building energy saving is applied to BEMS (Building Energy Management System) by using an outdoor air temperature prediction strategy. BEMS coupling with renewable energy can control HVAC (Heating, Ventilating and Air-Conditioning) system effectively. In order to verify the effectiveness of building energy saving, BEMS was tested for several months at a laboratorial chamber with an air conditioner, fan and heater. To this end BEMS embedded control algorithm has been tested successfully.

Cost-Effective Model for Energy Saving in Super-Tall Building

  • Song, Kwonsik;Park, Moonseo;Lee, Hyun-Soo;Kim, Sooyoung;Shin, Jinho
    • Journal of Construction Engineering and Project Management
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    • v.3 no.3
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    • pp.17-22
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    • 2013
  • In many urban cities, super-tall buildings have been being constructed around New York and Chicago as the center since 1930 to improve the efficiency of land use and respond to new residential type. In terms of energy consumption, super-tall buildings are classified as a top energy consumption building. Also, as time passed, the degradation of energy performance occurs in super-tall buildings like general things so that these cannot show the initial performance planned in the design phase. Accordingly, building owners need to make a plan to apply energy saving measures to existing building during the operation phase. In order to select energy saving measures, calculus-based methods and enumerative schemes have been typically used. However, these methods are time-consuming and previous studies which used these methods have problems with not considering the initial construction cost. Consequently, this study proposes a model for selecting an optimal combination of energy saving measures which derives maximum energy saving within allowable cost using genetic algorithms. As a contribution of this research, it would be expected that a model is utilized as one of the decision-making tools during the planning stage for energy saving.

A Economic Feasibility Analysis of Energy Saving Technology Application to Underground Subway Station

  • Kim, Hyungchul;Shin, Seungkwon;Jung, Hosung;Kim, Jin-o;Cha, Junmin
    • International Journal of Internet, Broadcasting and Communication
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    • v.7 no.2
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    • pp.36-40
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    • 2015
  • In Korea, new total energy-saving solution has planned to build test-bed in underground subway station. Breaking energy is one of the most energy saving method in railway, but it has not be fully used up for economical purpose. This paper demonstrates on energy saving technology application including breaking energy and heating energy to underground subway station. It also offer solution of optimization of power energy flow. Moreover, economic feasibility analysis performed for undergound test bed constuction.