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Râmnicu Vâlcea. COLEGIUL TEHNIC ENERGETIC. “We are a school for all young people , a chance for everyone – we are a school for the future:”. C ompetence T ena city E nerg y. Electric power from renewable sources E-RES Micro-hydropower plants - MHP. 1. Why power from renewable sources?

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Râmnicu Vâlcea

COLEGIUL TEHNICENERGETIC

“We are a school for all young people , a chance for everyone – we are a school for the future:”

Competence TenacityEnergy

slide2

Electric power from renewable sources E-RES

Micro-hydropower plants - MHP

  • 1. Why power from renewable sources?
  • For the protection of the environment, increasing theenergy autonomy by using the natural potential of the geographical area, economic reasons and social cohesion.
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For Romania an average of 33% of electric power is estimated to possibly be provided through RES, in approximately 5000 locations, suitable for small scale hydropower constructions – micro hydropower plants.

  • Hydropower: the first accomplishment in Romania is the Grozăveşti power plant, on Ciurel Lake, Bucharest 1889.
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Vâlcea County is representative for the hydroelectric constructions which use the hydraulic potential of the river Olt and its tributary rivers, especially Lotru. .

  • Olt Hydrographic Basin represents 17% of the potential of the interior rivers, and counts today on 27 hydropower plants, 4 micro-hydropower plants and other installations.
slide5

What does hydroenergy mean?

Hydropower is electricity generated by hydropower through water force.

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2. What is HydroPower?

    • Hydropower is the electric power generated by hydropower plants, through the power of water.
    • Advantages:
    • the settlement of the river courses
    • it is adapted to the potential energy of the country
    • cheap exploitation
    • environmentally friendly
    • Disadvantages:
      • it produces major changes to the natural environment, dams and other constructions
      • substantial financial investments.
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Hydroelectric Power Plant

Assumes mechanisms involving twisted or powerful engines and turbines that use water power to producte electricity.

What does hydroelectric mean?

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3. Hydropower plants – HPP

  • are power plants in which electricity is produced by the mechanical power of a turbine, which is set in motion by water force (water fall or large flow).
  • The components of a HPP are:
  • Accumulation lake formed behind a dam.
  • The dam – artificial obstacle for the storage of large quantities of water.
  • Adduction – takes over the water from the lake and caries it to the power plant (forced gallery, forced pipe, distribution to the turbines – two minimum).
  • Pressure node made of:
  • Castle of balance – safety construction which takes over the level changes of the water
  • Valve house – adjusts the quantity of water that goes through the adduction pipe to the power plant.
  • Main power plant:
  • The building of the power plant
  • The engine room where the turbine transforms the force of water in mechanical energy, that the generator turns into electric power; installations which provide the cooling water to the aggregates, oil under pressure, compressed air; lifting machines, like slide bridges;
  • control room with automatic equipment for distance command.
  • Transformer station where the parameters of the electric power produced are raised to proper values for the transportation through the electric network.
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Canals

Canal running, CHE Subcetate

Water intakes

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4. Micro-hydropower plants – MHP

  • Installed power ≤ 10MW means micro-hydropower plant, small hydropower plants and micro-hydropower plants characterized by power of 5:100KW, which can assure enough electric power for a small community or for industry in isolated areas.
  • They have the same components as a hydropower plant, but can be the most efficient and the cheapest generator of electricity.
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5. MHP Latorita – an example of a micro-hydropower plant in Romania

  • we chose as an example MHC Latorita, near HPP Lotru – Ciunget;
  • It is built on river Latorita, tributary to Lotru, with a small accumulation through a compensation basin.
  • MHP Latorita is a back-up source, independent, providing electric power to HPP Lotru;
  • It works under an automatic regime – connected to the supply network of HPP Ciunget or in anisolated regime- “starting from zero” (when it provides the power necessary to a group for the Ciunget power plant, when this one is switched off from the National Energy System).
  • Assures the sufficient flow of water for cooling down the hydro aggregates of the Ciunget power plant;
  • Assures the evacuation of the surplus of energy on the low tension network (0,4 KV);
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Picturesof the installation components:

        • Latorita caption, with photo: caption threshold, grit, compensation basin;
        • Adduction pipe, with photo:surface, underground horizontal and vertical;
        • Francis Micro-aggregate (A, B, C)
        • Synchronous generator: 400 KVA, 320 KW, 400 V, 50Hz
        • Adjustment system (with a rotation adjuster, hydraulic aggregate as a source of under pressure oil);
        • Control cabinet for the electronic components;
        • Control system with a programmable automat, automatic elements, auxiliary electronic circuits and software program.
the components of latori a capture
THE COMPONENTS OF LATORIŢA CAPTURE

l/s

  • Capture threshold
  • Grit
relationship between water and mhc latori a capture
RELATIONSHIP BETWEEN WATER AND MHC Latoriţa capture
  • Horizontal underground supply pipeline.
  • Underground culvert pipe down
synchronous generator
SYNCHRONOUS GENERATOR

synchronous generatortype A335 L04

adjustment system
Adjustment system
  • source of under pressure oil.
  • hydraulic aggregate
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6. MHP Păscoaia II, III and IV– an example of a micro-hydropower plant in Romania

Romania hydro developer SC Hidro Este SRL seeks bids for construction of four small hydroelectric projects and bids to supply turbine-generators and other equipment in Romania, project comprising small hydro projects Pascoaia 1, 2, and 3 on the Pascoaia River and Priboiasa 1 on the Priboiasa River in Romania. The work is valued at 38.2 million leu (US$13.2 million).

slide26

Pelton turbine ( Păscoaia II)

Work costs

TOTAL:3.214.990 Lei / 784.144 euro

Building costs:

2.684.904 lei / 654.855euro

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Hydropower sector PASCOAIA III, IV

VALCEA

CROSSFLOW-TURBINE

Work- costs:

Total: 3.190.563/ 778.186 euro

Building costs:

2.700.492 lei/ 658.657euro

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Other MHP in România:

Târgu Mureş MHP