• Title/Summary/Keyword: Small Hydro-Power

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An Application Case Study of Improving Performance of Small Hydro-power (소수력 성능향상 사례연구)

  • Kim, Sang-Gyun;Park, Ji-Kun;Lee, Yeon-Ju
    • 한국신재생에너지학회:학술대회논문집
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    • 2011.11a
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    • pp.165.1-165.1
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    • 2011
  • In this paper, it is intended to study about deferences of design and operation properties between large and small hydro-power house's turbine which type is reaction. In generally, turbine of large hydro-power has a more safe and effective energy output mechanisms than small hydro-power's because the turbine of small hydro-power is more sensitive to hydraulic losses. But, it is more effective for the all energy market to improve the capability and efficiency of small hydro-power in the present status of increasing construction of small hydro-power than large hydro-power. Therefore, we intend to investigate and introduce the way to enhance the efficiencies of reaction turbine adopted to small hydro-power.

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Feasibility Study on the Construction of Small Hydro-Power Plants in Gumi Sewage Treatment Plant Discharge Point (구미하수처리장 방류구에서의 소수력발전 설치 및 운영에 관한 연구)

  • Nah, Dong-Hun;Lee, Seung-Hwan
    • Journal of Korean Society of Water and Wastewater
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    • v.24 no.2
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    • pp.173-181
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    • 2010
  • This study was conducted to investigate the possible installation of small hydro-power plant at the discharge point of Gumi sewage treatment plant (STP) using treated wastewater. Sufficient amount of water to transfer to electric power and the selection of proper location are two essential elements for the construction of small hydro-power facility. Preliminary analysis based on site visit and existing data in Gumi STP were made. Capacity of the small hydro-power plants and exact location were determined by geomorphological condition and flow duration characteristics. Flow duration characteristics and its duration curve were identified using monthly rainfall data in Gumi STP. Relevant facts of small hydro-power system in other STP were referred to adopt to Gumi STP situation. Flowrate of treated effluents and effective head between flow chamber and the location of hydraulic turbine in Gumi STP are found to be $3.70m^3$/sec and 3.5m respectively. Electric generation rate based on this feasibility study was estimated to be 86.3kW/h. Yearly electric generation rate was expected to be 932.4MMh. Proposed small hydro-power plant construction in Gumi STP is to be reasonable.

Construction of Marine Small Hydro Power Plant using Discharge Water of Fish Farm (양어장 방류수를 이용한 해양소수력발전소 구축에 관한 연구)

  • Hwang, Yeong-Cheol;Choi, Young-Do
    • The KSFM Journal of Fluid Machinery
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    • v.16 no.5
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    • pp.11-17
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    • 2013
  • This study is aimed to construct a marine small hydro power plant using discharge water of fish farm in Jeju Haengwon-ri. The difference of design methods between marine small hydro power plant and land small hydro power plant is to consider the tides. Moreover, ground condition should be examined because gushout sea water comes out from the ground at high tide in Jeju as the ground of Jeju beach consists of basalt stone. From the field test of the turbine generator after construction of the power plant, output power and efficiency of the turbine generator shows good conformance to the required conditions.

A Study on the Modeling Analysis for Kaplan Micro-turbines (케프란 마이크로터빈의 모델링 해석에 관한 연구)

  • Kim, O.S.;Kim, I.S.;Kim, H.H.;Shim, J.Y.
    • Journal of Power System Engineering
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    • v.10 no.4
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    • pp.105-110
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    • 2006
  • Among many other alternative energy resources, small scale hydro power has been brought into attention as a reliable source of energy today, which had been relatively neglected since 1960s. Especially, Kaplan micro-turbine can be applied to various kind of small hydro power plants, such as reservoirs for agriculture purpose, sewage treatment plants and water purification plants. However present low head of Kaplan micro-turbines and small scale hydro turbines, have limitations in the minimum required head and flow rate for efficient operation. This research is to develop modeling analysis for the Kaplan micro-turbine, which can improve economical features of small hydro power plants. The contents and scope of this research are the efficiency improvement of Kaplan micro-turbine.

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A Study on Output Increase of Small Hypro Power using Nature Energy (자연에너지를 이용한 소수력 출력증대 방안 연구)

  • Chae, Ji-Seog;Yoon, Lee-Soo;Kim, Tae-Ho;Kim, Young-Il;Ma, Bem-Gu;Choi, Jang-Kyu
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.1129-1130
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    • 2011
  • The output of small hydro power plant was generated less than rated output under high temperature. We Installed the artificial ventilation that blow cold wind from water supply pipe tunnel to small hydro power plant. The temperature of small hydro power has been decreased. The output of small hydro power plant has been increased from 405kW to 445kW.

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Performance Analysis of 10kW Class Propeller Hydro Turbine by the Change of Flow Rates and the Number of Runner Vane Using CFD (CFD를 이용한 10kW급 모델 실험용 프로펠러 수차의 유량 및 러너 베인 깃 수 변화에 따른 성능해석)

  • Park, Ji-Hoon;Kim, You-Taek;Cho, Yong;Kim, Byeong-Kon;Lee, Young-Ho
    • The KSFM Journal of Fluid Machinery
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    • v.17 no.2
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    • pp.5-11
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    • 2014
  • Small hydro power, among other renewable energy resources, has been evaluated to have enough development value because it is a clean, renewable and abundant energy resource. In addition, small hydro power has the advantage of low cost development by using existing facilities like sewage treatment plants, water works and similar resources. But in the case of small hydro power systems, there are problems with degraded operation efficiency of turbine due to changes in flow rates. In order to overcome this, variable speed control can be achieved by using the power rectifier and permanent magnetic synchronous generator(PMSG) as a possible method to respond to the changes in flow rates. In this study, a commercial ANSYS CFD code was used to analyze the performance of 10kW class propeller hydro turbine and to also investigate flow characteristics at variable flow rates and runner vane.

AN ANALYSIS OF PERFORMANCE CHARACTERISTICS FOR SMALL HYDRO POWER PLANTS

  • Park, Wan-Soon;Lee, Chul-Hyung;Jeong, Sang-Man
    • Water Engineering Research
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    • v.2 no.1
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    • pp.11-19
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    • 2001
  • A performance prediction model for Small Hydro Power(SHP) sites has been studied and developed. Twelve SHP sites were selected and the performance characteristics were analyzed by using the developed model. Also, primary design specifications such as design flowrate, plant capacity, operational rate were suggested and feasibility for small hydro power sites were estimated. It was found that the design flowrate is most important parameter to exploit SHP plant and the methodology developed in this study can be a useful tool to analyze the performance of SHP sites.

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Effect Analysis on Self-supporting Energy of Newtown Sewage Treatment Facility for Low-carbon Green City (저탄소 녹색도시 조성을 위한 신도시 하수처리시설의 에너지 자립 효과 분석)

  • Ahn, Soo-Jeung;Hyun, Kyoung-Hak;Kim, Jong-Yeob;Choung, Youn-Kyoo
    • Journal of Korean Society of Water and Wastewater
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    • v.24 no.6
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    • pp.683-690
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    • 2010
  • Renewable and unutilized energy (biogas power generation, wind power, solar, small hydro-power, sewage heat source, etc.) seems to be suitable to install for the sewage treatment facilities. There are 357 sewage treatment plants in 2007. 17 plants among these have been operating for self-supporting energy by using solar power, small hydro-power and biogas in 2008. Newly built sewage treatment plant of 96,000 $m^3$/day for a newtown is expected to get up to energy consumption of 10 GWh/yr. If solar energy, small hydro-power and biogas-equipments were applied to the new treatment plant, self-supporting energy of the new sewage treatment plant will get up to 56.1%. As a results, about 2,379ton $CO_2$/yr $CO_2$ emission reduction can be expected by using renewable energy. These efforts for self-supporting energy will lead sewage treatment plant to new energy recycle center.

Hydro-electric Power Generation System of Multi-purpose Dams in Koresa - A Framework for Investment Justification and Economic Operation - (한국의 다목적댐 수력발전 체계 - 투자의 정당화와 경제적 운영 -)

  • 이승규;박용삼
    • Korean Management Science Review
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    • v.12 no.1
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    • pp.157-173
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    • 1995
  • Hydro-electric power generation from multi-purpose dams has been playing important roles in the electric power supply network in Korea. Although the total share of hydro power in national electricity supply now becomes very small, the peak-shaving and frequency control capability of hydro power helps the power company enormously in maintaining the quality of power. But since the company that builds and operates the multi-purpose dams in Korea has to sell all the electricity produced to the monopolistic utility, there have been various problems in justifying the investment, designing pricing mechanism, and controlling operations of the power plants. In addition, economic evaluation of the hydro power has been distorted by a variety of reasons and hence it has been very difficult to encourage effective development and utilization of national water resources. To make the problem worse, both parties are public companies with X-inefficiency problems. Thus, changing environment requires to reengineer the system that governs hydro power generation. We address the problems of Korean hydro-electric power generation system in four areas: the investment justification process, the operations decison right of the hydro power plants, the pricing of the purchased-power, and the negotiation of contract revision. Then we propose improvement directions of new hydro-electric power system in view of static and dynamic efficiency, X-inefficiency and equity.

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A Study of Design factors for Increasing Energy Production in Small Hydro power with Using Long Pipe (장대관로를 이용한 소수력 발전량 향상을 위한 설계요소에 관한 연구)

  • Kim, Hyun-Han;Kim, Kwang-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.8
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    • pp.1134-1139
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    • 2014
  • Recently the need for renewable energy development is expanding due to the global climate change, the environmental issues and the limited fossil energy resources. Dependence of energy on overseas is high in Korea. To resolve the environmental problems and to improve the energy independence rate, the development of renewable energy is more required. The small hydro power, one of the renewable energy resources, has been developing and operating from a long time ago. If we are new developing a small hydro power with the use existing dams and reservoirs, we will design the length of inlet pipe and the diameter suitable for it. However, in case of using the existing water supply pipe which had been designed suitable for water service, the designer has to review and check that the pipe is suitable for operating a generator. In this paper, the design of small hydro power using the existing long pipe of water supply, we suggest the optimum way to reduce the water hammer in pipe which causes the unsteady flow during the load-shutdown of generator, the generator operation plan for the stable supply of water and the design factor of determining the generator capacity through the analysis between discharge and head-loss.