Energia Wiatrowa w Patras
Roczny uzysk
2938
kWh/year
Okres zwrotu
not reached
Redukcja CO₂
1.3
t CO₂/year
Przykład: instalacja 10 kW, wartości średnie dla kraju
Często zadawane pytania o Patras
Ile energii produkuje turbina wiatrowa 10 kW w Patras?
Przy współczynniku mocy 3 %, turbina 10 kW w Patras wytwarza około 2938 kWh rocznie.
Ile kosztuje mała turbina wiatrowa w Patras?
Turbina 10 kW w Patras kosztuje około 40,000 € wraz z montażem.
Jaki jest czas zwrotu inwestycji w turbinę wiatrową w Patras?
Given local wind conditions, the investment is not paid back within the 20-year horizon of this example calculation.
Ile CO₂ oszczędza turbina wiatrowa w Patras rocznie?
Turbina 10 kW w Patras pozwala uniknąć emisji około 1.3 t CO₂ rocznie.
Assumptions and provenance
This example calculation is disclosed in full. Every quantity below enters the figures above exactly as stated — a specialist can recompute them or substitute their own assumptions.
- Payback (cumulative)
- not reached in 20 years
- Payback (discounted)
- not reached in 20 years
- Payback (static)
- —
Sum of the nominal annual net benefits, including degradation, price escalation and replacement costs — not discounted. This is the figure shown above.
The same cash flows, discounted at the nominal rate the net present value uses. Always the later of the two.
Investment divided by the first year's benefit — without price escalation, degradation or replacement costs. Many quotes use this; depending on the assumptions it comes out shorter or longer.
| Quantity | Value | Source / note |
|---|---|---|
| System size | 10 kW | Example system of this page |
| Investment | 40 000 € (4000 €/kW) | IEA Wind TCP Task 27 / WindEurope: 3.000–6.000 €/kW installiert für Kleinwind, Mittelwert bei 10 kW |
| Operating cost | 1200 €/a | — |
| Electricity price | 0,220 EUR/kWh | Eurostat nrg_pc_204, Band DC, 2025-S2 |
| Feed-in tariff | 0,0700 EUR/kWh | — |
| Self-consumption share | 20 % | Wind generates at night and in winter — the share is structurally below that of solar. |
| Degradation | 0,5 %/a | — |
| Price escalation | 2,0 %/a | — |
| Discount rate | 3,0 %/a | Nominal, matching the nominally escalating revenues |
| Horizon | 20 years | — |
| Grid CO₂ factor | 441 g/kWh | EEA, greenhouse gas emission intensity of electricity generation (seed), 2023 |
| Wind speed (data source) | 4,46 m/s | Annual mean at 50 m reference height |
| Wind speed (hub height) | 3,35 m/s | Logarithmic wind profile, converted to 15 m |
| Hub height | 15 m | — |
| Terrain | Suburban | z₀ = 0.4 m |
| Weibull shape parameter k | 2,00 | — |
| Air density | 1,247 kg/m³ | — |
| Capacity factor | 3,4 % net | Gross 4,0 %, less 16 % losses |
Data source: not recorded with this cached figure. Wind comes from the New European Wind Atlas, or from NASA POWER outside its coverage; which of the two produced this number was not stored alongside it, and it is not assigned retrospectively.
Non-binding initial assessment for an example system, not professional advice. Small wind requires an on-site wind measurement before any investment decision.