• Title/Summary/Keyword: energy consumption reduction

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Comparison Analysis of Building's Heating Energy Consumption in the Apartment Complex - Focused on Apartment in Daejeon - (공동주택 단지 내 동별 난방에너지소요량 비교 분석 - 대전지역 아파트단지를 중심으로 -)

  • Jang, Young-Hye;Kim, Jeong-Gook;Kim, Jonghun;Jeong, Hakgeun;Hong, Won-Hwa;Jang, Cheol-Yong
    • KIEAE Journal
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    • v.15 no.3
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    • pp.37-42
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    • 2015
  • Purpose: Apartment is a typical residential type in Korea. In the past, apartment types were very monotonous. But today, the types of complex are changed because personal needs have been diversified and personalized. In order to meet those needs, construction companies are constructing various types of apartments. The more apartment types are diverse, the more the energy problems are taken place. So, the purpose of this study is to solve the problem of energy gap in the same complex through improving the thermal transmittance of wall. Method: Heating energy consumption of Building Energy Efficiency Rating System and heating energy usage of apartment show a similar trend on the graph. In order to identify the best position of heating energy consumption difference reduction, we change the building's U-value of front, back, side walls. Result: In the A complex, maximum and minimum heating energy consumption building's shapes are flat. the best efficiency is side U-value change and the worst is front change. In the E complex, maximum heating energy consumption building's shape is tower and minimum building shape is flat. Consequently, the front and back wall performance change was little effect to reduce energy gap, while the change of side wall's U-value show the great reduction between building's energy consumptions.

A study on the Energy Consumption and the Greenhouse gas Emission intensity of Detached Houses in Daegu (대구광역시 단독주택의 에너지 및 온실가스 배출원단위 작성에 관한 연구)

  • Kim, Ju-Young;Kim, Yu-Lan;Hong, Won-Hwa
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2009.11a
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    • pp.89-94
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    • 2009
  • The purpose of this study is to provide a fundamental data for reducing energy consumption and greenhouse gas emission of detached houses by investigating the energy consumption characteristic of detached houses in Daegu. Although the ratio of the detached houses decreases, the detached houses are common dwelling form next to apartments. Nevertheless the study about the energy consumption of detached houses has been insufficient compared apartments. There is a necessity which will investigate the energy consumption characteristic of detached houses. Because that with the building quality which is various form is different from apartments. This study investigate construction and equipment conditions and analyzing effective factors on energy consumption of detached houses. And this study draw up the energy consumption unit and emission factors unit for greenhouse gas of detached houses. This study represent a basic report for energy consumption reduction and helps effective use of energy.

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Methods to Reduce Greenhouse Gas for University Buildings to Make a Low-Carbon Green Campus - With Case Study on the 'E' University -

  • Song, Su Min;Peom, Sung Woo;Park, Hyo Soon;Song, Kyoo Dong
    • KIEAE Journal
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    • v.14 no.2
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    • pp.37-46
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    • 2014
  • University buildings are energy-guzzling facility that consume more than 10,000TOE within a campus annually. Even the consumption is on an upswing trend. Behind such high consumption are there cheap power rates for education facility, lack of high-efficiency equipment and ever-increasing use of various information equipment. Being keenly aware that greenhouse gas emission increases due to such rise of energy consumption, the present study carried out a case study. In the case study, the study chose the buildings of E university from top 10 universities that consume energy most in Seoul and examined the current status of their energy consumption and greenhouse gas emission. And then it set the reduction target of greenhouse gas by year. Putting aside a middle and long-termed strategy for later endeavor, it first established the 1st year's implementation plan (2014) for energy saving and greenhouse gas reduction with limited budget and according to greenhouse gas reduction target. The plan is specified as follows. Targets for energy saving are mainly divided into two sectors: machine equipment and electric equipment. 7 ideas were proposed. Three ideas to improve machine equipment are to replace with high-efficiency boilers and chillers and to adjust the position of the cooling tower. By doing so, it was estimated that energy could be saved by 176.34TOE in total and greenhouse gas could be reduced by 370.771t$CO_2$-eq. Four ideas to improve electric equipment include the replacement with LED lights, LED emergency lights and high-efficiency motors and the installation of motion sensors. It was calculated that such replacement could conserve 1,076.08TOE (electric energy) and reduce 2,181.420t$CO_2$-eq (greenhouse gas).

Does nuclear energy reduce consumption-based carbon emissions: The role of environmental taxes and trade globalization in highest carbon emitting countries

  • Muhammad Yasir Mehboob;Benjiang Ma;Muhammad Sadiq;Yunsheng Zhang
    • Nuclear Engineering and Technology
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    • v.56 no.1
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    • pp.180-188
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    • 2024
  • This research examined consumption-based carbon emission reduction by nuclear energy consumption and environmental tax while considering the context of trade globalization in the highest five emitter nations from 1990 to 2020. This study used various empirical methodologies, including preliminary analysis to check the stationarity and cointegration, the CS-ARDL for long-run analysis, CCEMG, AMG for robustness, and the D-H causality test for short-term pairwise causation. The results indicated that nuclear energy consumption, environmental tax, and trade globalization help to mitigate consumption-based carbon emissions while economic growth and population density boost carbon emissions. Furthermore, the results also found two-way casual connection exists between nuclear energy consumption, population density, and consumption-based carbon emissions. Thus, the results emphasize the need for government policies that encourage nuclear energy and environmental tax as a strategy to reduce carbon emissions and achieve and maintain environmental development.

Stepwise Technique for Improving Building Energy Efficiency Rating Utilizing Quantified Simulation Model (정량화 시뮬레이션 모델을 활용한 단계적인 건축물에너지효율등급 향상 방안)

  • Kim, Gi-Seok;Kim, You-Min;Kim, Jong-Seung;Oh, Se-Gyu
    • KIEAE Journal
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    • v.14 no.6
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    • pp.65-73
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    • 2014
  • Due to the Climate change and resource shortage by global warming, various problems are rising and getting worse around the world. Many countries are doing the considerable efforts to reduce greenhouse gas emissions. The government of South Korea also plans to decrease greenhouse gas emission, the various pilot projects are underway, which includes obligation of energy efficiency 1st rating and greenhouse gas target management system of public buildings. In particular, luxurious government office buildings and energy-wasting public building have issued and emerged as a social problem. Energy efficiency improvement of the existing public office buildings are becoming an important issue recently. This study is proposed the step-by-step energy improvement model according to the building energy efficiency rate in order to reduce the energy consumption. To attain this end, I set up a base model by analyzing the current architectural conditions of the existing public office buildings and grasped the specific properties of building energy consumption through energy simulations. Furthermore, I suggested phased reduction prototypes for the reduction target of energy consumption by applying the methods of the zero energy building plan. This study is expecting that prototypes would give directions when it comes to planning the implementation policy of phased building plan factors, according the building energy consumption reduction goal in the existing public office buildings which are the subject of building energy target management system.

A Method for Setting Energy Saving Goals of Existing Buildings - Based Energy Consumption Results Data - (기존 건축물의 에너지소비량 절감목표 산정 방법 - 에너지소비량 실적 데이터 기반 -)

  • Yeo, Changjae;Yu, Jungho;Moon, Hyunseok;Kim, Seungjin
    • Korean Journal of Construction Engineering and Management
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    • v.16 no.3
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    • pp.123-131
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    • 2015
  • There are a number of policies that have been established to reduce greenhouse gases emissions and reduce energy consumption. These polices, however, only reflect the building energy consumption saving rate without considering building energy consumption characteristic. If building that already use less energy apply the same saving rate to reduce energy consumption, it is less effective. Therefore, this study classified building energy consumption characteristics and investigated approaches to adopt individual reduction rates according to energy consumption. Analysis results showed that there are differences in energy consumption depending on building use, and therefore, we classified buildings by use. We also proposed a formula to set a reduction goal for rate of energy consumption according to energy consumption. We verified our approach in a top-end neighborhood facility in Seoul. The energy consumption savings goal of this study can be applied individually, but determining whether a building can reduce energy consumption towards a saving goal requires a closer look at each building.

Study on the Reduction of Energy Consumption in the Pulsed Corona Discharge Process for NOx Removal (질소산화물 제거를 위한 펄스코로나 방전공정의 에너지 소모 저감에 관한 연구)

  • 정재우;손병학;조무현;목영선;남궁원
    • Journal of Korean Society for Atmospheric Environment
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    • v.15 no.4
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    • pp.475-483
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    • 1999
  • A lab-scale test was carried out to study the reduction of electrical energy consumption in the pulsed corona discharge process for nitrogen oxides removal. The experiment was mainly focused on 1) the activation of pollution removal reactions by chemical additives and 2) the optimization of electrical circuit for the efficient energy transfer from the power supply to the corona reactor. Hydrocarbon chemical additives used in the experiment are thought to be responsible for the enhancement of the NO conversion through the chain reactions of free radicals such as, R, RCO, and RO. Electrical energy consumption per converted NO molecule has a minimum value of 17 eV when pentanol is injected. When ethylene and propylene are injected, 30 eV and 22 eV of electrical energy consumption is required for the conversion of NO molecule respectively. The ratio of the pulse forming capacitance$(C_e)$ to the reactor capacitance$(C_R)$ plays an important role in the energy transfer efficiency to the reactor. Maximum energy transfer efficiency of approximately 72% could be obtained by using the pulse forming capacitance which is 3.4 times larger than the reactor capacitance, and also the maximum NO conversion efficiency was observed with the same condition.

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On Effective Slack Reclamation in Task Scheduling for Energy Reduction

  • Lee, Young-Choon;Zomaya, Albert Y.
    • Journal of Information Processing Systems
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    • v.5 no.4
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    • pp.175-186
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    • 2009
  • Power consumed by modern computer systems, particularly servers in data centers has almost reached an unacceptable level. However, their energy consumption is often not justifiable when their utilization is considered; that is, they tend to consume more energy than needed for their computing related jobs. Task scheduling in distributed computing systems (DCSs) can play a crucial role in increasing utilization; this will lead to the reduction in energy consumption. In this paper, we address the problem of scheduling precedence-constrained parallel applications in DCSs, and present two energy- conscious scheduling algorithms. Our scheduling algorithms adopt dynamic voltage and frequency scaling (DVFS) to minimize energy consumption. DVFS, as an efficient power management technology, has been increasingly integrated into many recent commodity processors. DVFS enables these processors to operate with different voltage supply levels at the expense of sacrificing clock frequencies. In the context of scheduling, this multiple voltage facility implies that there is a trade-off between the quality of schedules and energy consumption. Our algorithms effectively balance these two performance goals using a novel objective function and its variant, which take into account both goals; this claim is verified by the results obtained from our extensive comparative evaluation study.

A Study on a Efficiency of Glazing for Energy Reduction of Curtain Wall Buildings (유리성능에 따른 커튼월건물의 에너지절약효과에 대한 연구 -표준건물 에너지소비와의 비교분석을 중심으로-)

  • Lee, Yong-Jun;Jung, Kwang-Sub;Oh, Bo-Hwan;Kang, Jae-Sik;Choi, Kyoung-Suk;Lee, Deuk-Ho
    • Proceedings of the SAREK Conference
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    • 2009.06a
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    • pp.114-119
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    • 2009
  • This study has been conducted to describe the establishment of national measures to reduce world energy consumption and $CO_2$ Emission. Particularly, Reductions in energy consumption from building operation is the most important part to achieve these national objectives. Element to evaluate the quantitative effects of these systems by having rationalized regulation and operation is essential, when planning for building energy reduction design. USGBC(US Green Building Council) have operated sustainable assessment method called LEED, which introduces baseline performance and evaluation direction for building simulation techniques. This research analyzed Quantitative assessments of the building energy consumption and analyzed baseline figures to provide comparative analysis with standard building settings.

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Change of Main Body Temperature and Reduction of Energy Consumption in a 1 Tube 2 Chamber Bent Silkworm Type Dyeing Machine

  • Lee, Choon-Gil;Woo, Kyung-Sung
    • Fashion & Textile Research Journal
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    • v.4 no.6
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    • pp.550-556
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    • 2002
  • The changes of the main body temperature of a I tube 2 chamber bent silkworm type dyeing machine and the reduction of energy consumption of the dyeing machine by the energy saving design are reported. This dyeing machine was developed for the purpose of the energy saving and high efficiency. In this study, the changes of the main body temperature of the 1 tube 2 chamber bent silkworm type dyeing machine were studied experimentally. Especially the effect of the blower motor electric current and the main body pressure at various blower frequencies were studied experimentally. In the experimental data for the changes of main body temperature, it was shown that the main body temperature increased as the blower motor electric current and the main body pressure increased.