4-3-1 Design - Workshop on Renewable Energies March 17,...

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Unformatted text preview: Workshop on Renewable Energies March 17, 2005 Majuro, Republic of the Marshall Islands Module 4.3 Module 4.3 – Micro Micro-Hydro Hydro 4.3.1 Designing 4.3.1 Designing Tokyo Electric Power Co. (TEPCO) e 7 / P P A W o r k s h o p o n R e n e w a b l e E n e r g i e s 2 Contents Contents • Design for Civil Work • Calculation of Head Loss • Design of Electrical and Mechanical Equipment e 7 / P P A W o r k s h o p o n R e n e w a b l e E n e r g i e s 3 1. Selecting a Type of Intake Weir or Dam (a) Concrete gravity dam (b) Floating concrete dam (c) Earth dam (d) Rockfill dam (e) Wet masonry dam (f) Gabion dam (g) Concrete reinforced gabion dam (h) Brushwood dam (i) Wooden dam (j) Wooden-frame dam with gravel Design for Civil Work Design for Civil Work e 7 / P P A W o r k s h o p o n R e n e w a b l e E n e r g i e s 4 1-1.Concrete gravity dam Concrete is used for the construction of the entire body. • Foundation : Bedrock • River conditions : Not governed by gradient, discharge or level of sediment load • Intake conditions: Good interception performance and intake efficiency Design for Civil Work Design for Civil Work e 7 / P P A W o r k s h o p o n R e n e w a b l e E n e r g i e s 5 1-2. Floating concrete dam Lengthened infiltration path of the foundations by means of cut-off, etc. to improve the interception performance •Foundations : In principle, gravel •River conditions : Not affected by the gradient, discharge or level of sediment load •Intake conditions: Good interception performance and intake efficiency Design for Civil Work Design for Civil Work Longer Cut-off e 7 / P P A W o r k s h o p o n R e n e w a b l e E n e r g i e s 6 1-3. Earth dam Earth is used as the main material for the body. The introduction of a riprap and core wall may be necessary depending on the situation. •Foundations : Variable from earth to bedrock •River conditions : Gentle flow and easy to deal with flooding •Intake conditions: High interception performance and good intake efficiency Design for Civil Work Design for Civil Work e 7 / P P A W o r k s h o p o n R e n e w a b l e E n e r g i e s 7 1-4. Rockfill dam Gravel is used as the main material for the body. The introduction of a core wall may be necessary depending on the situation. •Foundations : Various, from earth to bedrock •River Conditions : River where an earth dam could be washed away by normal discharge •Intake conditions: Limited to the partial use of river water due to the low intake efficiency Design for Civil Work Design for Civil Work e 7 / P P A W o r k s h o p o n R e n e w a b l e E n e r g i e s 8 1-5. Wet Masonry Dam Filling of the spaces between gravel with mortar, etc....
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This note was uploaded on 05/05/2011 for the course FC gj, taught by Professor Glokgh during the Spring '97 term at Punjab Engineering College.

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4-3-1 Design - Workshop on Renewable Energies March 17,...

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