• Title, Summary, Keyword: electrical energy

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Influence of Authenticity on Electrical Energy Saving Behavioral Intention (진정성이 전기에너지 절약 행동의도에 미치는 영향)

  • Kim, Young-Doo
    • The Journal of Industrial Distribution & Business
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    • v.9 no.11
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    • pp.67-76
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    • 2018
  • Purpose - Electrical energy saving is one of the practical virtues relating to sustainable living. Therefore, policy-makers has tried to find a way to change the behaviors of individuals to encourage them to actively practice electrical energy saving, even if they have never had this concern or have only passively practiced electrical energy saving to this point. Prior research related to electrical energy saving can be categorized into several types. The first is focused on consumer characteristics linked to electrical energy saving. These studies are based on individual or household socio-demographic variables (e.g., age, gender, household income, education level, occupants, marital status, number of households), and psycho-graphics (e.g., environmental consciousness, value, attitude, motivation, lifestyle). The second is focused on policies (e.g., monetary incentives, information sharing, social comparison, feedback), and technologies (e.g., energy-efficiency home appliances, energy-reduced products, renewable resources). People generally have a favorable attitude towards electrical energy saving, while electrical energy saving practices tend to be less favorable. Therefore, it is necessary for policy-makers to seek out gaps between attitudes and behaviors and find alternatives to reduce these gaps. This study investigates the influence of authenticity on the behavioral intention of electrical energy saving. It is supposed that electrical energy saving practices are likely to be stronger as authenticity of individual or household becomes stronger. This study reviews prior literature and examines various studies to provide an understanding of the relationships between authenticity and electrical energy saving behavioral intention. Research design, data, and methodology - Hypothesis was drawn from analysis based on previous research. The items related to authenticity and electrical energy saving were selected from items found in previous research. To verify this hypothesis, data were collected via experimental survey method and the resulting data were analyzed using reliability analysis, correlation analysis, and hierarchical regression analysis. Results - This study found that authenticity had a positive impact on the behavioral intention of electrical energy saving. The higher the perceived degree of authenticity, the higher the behavioral intention of electrical energy saving. Conclusions - This study assesses the impact of authenticity on the behavioral intention of electrical energy saving. In order to enhance the practice of electrical energy saving, it is efficient strategy for policy-maker to improve the perceived authenticity of individuals.

A Survey on RF Energy Harvesting System with High Efficiency RF-DC Converters

  • Khan, Danial;Basim, Muhammad;Ali, Imran;Pu, YoungGun;Hwang, Keum Cheol;Yang, Youngoo;Kim, Dong In;Lee, Kang-Yoon
    • Journal of Semiconductor Engineering
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    • v.1 no.1
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    • pp.13-30
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    • 2020
  • Radio frequency (RF) energy harvesting technology have become a reliable and promising alternative to extend the lifetime of power-constrained wireless networks by eliminating the need for batteries. This emerging technology enables the low-power wireless devices to be self-sustaining and eco-friendly by scavenging RF energy from ambient environment or dedicated energy sources. These attributes make RF energy harvesting technology feasible and attractive to an extended range of applications. However, despite being the most reliable energy harvesting technology, there are several challenges (especially power conversion efficiency, output DC voltage and sensitivity) poised for the implementation of RF energy harvesting systems. In this article, a detailed literature on RF energy harvesting technology has been surveyed to provide guidance for RF energy harvesters design. Since signal strength of the received RF power is limited and weak, high efficiency state-of-the-art RF energy harvesters are required to design for providing sufficient DC supply voltage to wireless networks. Therefore, various designs and their trade-offs with comprehensive analysis for RF energy harvesters have been discussed. This paper can serve as a good reference for the researchers to catch new research topics in the field of RF energy harvesting.

Resonant Boost Converter for Harvesting Piezoelectric Energy (압전에너지 수확을 위한 공진형 부스트 컨버터)

  • Kim, Hyeok-Jin;Chung, Gyo-Bum
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.407-410
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    • 2009
  • A piezoelectric device which converts mechanical vibration energy into electrical energy is able to harvest energy and the usable energy is mW ${\sim}$ W, hence a converter is necessary to acquire the energy efficiently. Various limited conditions should be considered for the design of AC/DC converter for energy harvesting of a piezoelectric device supplying small amount of energy. In addition to simple structure, compact size, light weight and high efficiency, the energy harvesting AC!DC converter should adopt the technique of self operating, in which only the harvested energy from the piezoelectric device is available. This paper proposes new AC/DC resonant boost converter to harvest efficiently electrical energy from mechanical vibration energy, analyzes the operating characteristics of the converter and proves its feasibility for energy harvester with PSPICE simulation and experiment.

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Harmonic Distortion Contribution for the Transmission Loss Allocation in Deregulated Energy Market: A New Scheme for Industry Consumer

  • Nojeng, Syarifuddin;Hassan, Mohammad Yusri;Said, Dalila Mat;Abdullah, Md.Pauzi;Hussin, Faridah
    • Journal of Electrical Engineering and Technology
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    • v.10 no.1
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    • pp.1-7
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    • 2015
  • The industry has rapidly growth and energy supply technology advanced are become main factor which to contribute of the harmonic losses. This problem is one aspect that may affect the capability of the transmission line and also to the efficiency of electricity. This paper proposes a new scheme to allocate the cost pertaining to transmission loss due to harmonics. The proposed method, called as Generalized Harmonic Distribution Factor, uses the principle of proportional sharing method to allocate the losses among the transmission users especially for industry consumers. The IEEE 14- and 30 bus test system is used to compare the proposed method with existing method. The results showed that the proposed method provided a scheme better in allocating the cost of transmission loss, which could encourage the users to minimize the losses.

The Research in Rationalization of the use of Energy in Electric Power (에너지 이용 합리화를 위한 전기에너지 사용계획 수립에 관한 연구)

  • Kim, Man-Kook;Nam, Si-Bok
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.12
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    • pp.66-74
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    • 2009
  • This study investigated and analyzed electrical energy curtailment effect by each business department and by energy use efficiency elevation equipment because do an energy use plan that is enforced in each variety business that is developed in domestic by model. When plan the recent electrical energy use with this, I wish to contribute in energy use general planning establishment improvement that is aiming energy efficiency improvement newly by groping improvement plan moment deduce problem. Specially, search present condition and problem by electrical energy curtailment equipment application that probes mass and analyzed, and is applied in present our country according to analysis contents to the latest energy use plan that was enforced on energy use rationality narration but allowed purpose.

Analysis of Power Supply Cost According to Nuclear and Renewable Energy Policies (원전 및 신재생에너지 정책에 따른 전력공급비용 분석)

  • Woo, Pil Sung;Kim, Kang-won;Hwang, Soon-hyun;Kim, Balho H.
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.1
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    • pp.16-21
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    • 2018
  • As a result of the Fukushima disaster and climate change due to excessive greenhouse gases, international energy affairs are currently focused on establishing safe and environment-friendly policies. To achieve this, Republic of Korea has established a plan for environment-friendly energy supplies. It is expected that policy enforcement will be accompanied by an increase in energy supply costs. An analysis of energy supply costs is necessary before the establishment of any national energy policy. This paper analyzes and compares the energy supply costs accompanying environmental and nuclear energy policies, based on the Korean National Energy Master Plan and the Basic Plan for Long-Term Electricity Supply and Demand, in order to understand the implications of these national energy policies.

Energy Policies and Research/Development Trends in the USA

  • Kirkici, Hulya;Bernstein, Bruce
    • Transactions on Electrical and Electronic Materials
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    • v.11 no.5
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    • pp.197-201
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    • 2010
  • As the world population increases and technology advances, the energy consumption and need for more energy increase. Communities and governments regularly address these needs and set policies for future energy generation and uses. This paper reviews current energy policies of the USA and the current trends in research and development efforts, for sustainable and renewable energy sources. Furthermore, the recent topic of IEEE's Smart Grid initiatives is discussed, and its role in the dielectrics and electrical insulation research is presented.

Optimal Configuration Algorithm for ESS with Renewable Energy Resources Considering Peak-shaving Effects (신재생 에너지가 도입된 전력저장장치의 첨두부하절감 효과를 고려한 최적 구성 알고리즘)

  • Lee, Na-Eun;Kim, Wook-Won;Kim, Jin-O
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.9
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    • pp.1199-1205
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    • 2014
  • A power system configuration has been increasingly advanced with a number of generating units. In particular, renewable energy resources are widely introduced due to the environmental issues. When applying the renewable energy sources with the ESS (Energy Storage System), the ESS is the role of a potential generating resource in the power system while mitigating the output volatility of renewable energy resources. Thus, for applications of the ESS, the surrounding environment of it should be considered, which means that capacity and energy of the ESS can be affected. Moreover, operation strategy of the ESS should be proposed according to the installation purpose as well as the surrounding environment. In the paper, operation strategy of the ESS is proposed considering load demand and the output of renewable energy resources on a hourly basis. Then, the cost of electrical energy is minimized based on the economic model that consists of capital cost, operation cost, fuel cost, and grid cost for a year. It is sure that peak-shaving effects can be achieved while satisfying the minimum cost of electrical energy.

Nonuniformity of Energy Absorption Capabilities of ZnO Varistors

  • He, Jin-Liang;Han, Se-Won;Cho, Han-Goo;Kang, Hyung-Boo
    • The Korean Journal of Ceramics
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    • v.4 no.1
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    • pp.47-52
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    • 1998
  • The nonuniformity of energy absorption capability of ZnO varistor is systematically discussed in this paper. The nonuniformity of electrical characteristics and microstructure leads to decrease the energy absorption capability of ZnO varistor. The energy absorption capabilities were measured under different current waves, the experimental results stated that they have highly scattered phenomena. The influences of varistor surface area and nonuniformity of electrical characteristics to the energy absorption capability and the nonuniformity of commercial ZnO varistors were analyzed. There is a high nonuniformity existing in the energy absorption capability of commercial ZnO varistors.

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A study on Moving Surface Method to consider a motion of electrical machine with Finite Element Method (움직임을 고려한 전기기기의 유한요소 기법에 관한 연구)

  • Bae, Jae-Nam;Lim, Seung-Bin;Kim, Ki-Chan;Jung, Dae-Sung;Lee, Sung-Gu;Lee, Ju
    • Proceedings of the KIEE Conference
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    • pp.16-18
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    • 2006
  • 유한요소법을 사용한 전기기기의 해석에서는 움직임을 고려한 해석이 필수적이다. 본 논문에서는 전기기기의 유한요소 해석시 움직임을 고려하기 위한 방안으로써 Moving Suface기법을 소개하고 이 기법의 적용방법 및 장단점에 관하여 논하였다. 또한 이 기법을 검증하기 위하여 Moving Surface기법을 적용한 유한요소해석 프로그램을 개발하고, 개발한 프로그램을 사용하여 실제 모델을 해석해 그 결과치를 실험치와 비교함으로써 타당성을 입증하였다.

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