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Development cycle; storage plant layout

Short answer

A storage plant comprises a dam, spillway with gates, bottom outlet or diversion tunnel, intake tower with trash rack and gates, penstock through or around the dam, surface powerhouse at the dam toe, tailrace, and switchyard. Reservoir dead storage lies below MOL, live storage between MOL and FSL.

Discuss the hydropower development cycle with a flow chart. Draw the layout plan and section of a storage hydel plant with power house.

Hydropower development cycle (flow chart)

 Reconnaissance study
        |
 Pre-feasibility study
        |
 Feasibility study
        |
 Detailed design + tender
        |
 Construction + commissioning
        |
 Operation + maintenance
  • Reconnaissance: identify and rank sites using maps and site visits.
  • Pre-feasibility: survey, hydrology and geology; alternatives compared.
  • Feasibility: complete design, cost, benefits and environment study; decide on investment.
  • Detailed design: drawings, specifications, tender.
  • Construction: diversion, dam, waterways, powerhouse, equipment; commissioning.
  • Operation: generation, maintenance, monitoring.

Layout of a storage hydel plant with powerhouse

Plan
        Reservoir
   ~~~~~~~~~~~~~~~~~~
   ~~~~~~~~~~~~|Dam|----Spillway
        Intake +   |
               |   |
               Penstock
               |
               PH -> Tailrace -> River
Section
  FSL~~~~~~~~~|
  MOL  intake |  Dam (gravity/earthfill)
  ~~~~~~~~~~~~|\
              | \__penstock
                  \__PH --> tailrace

Components: dam, spillway with gates, bottom outlet / diversion tunnel, intake tower with trash rack and gates, penstock (through or around the dam), surface powerhouse at the dam toe, tailrace, switchyard. The reservoir is divided into dead storage (below MOL) and live storage (between MOL and FSL).

✓ Answer checked by Claude Opus 5.5 (high effort)

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