Critics of wind farms,which cost three times as much as conventional power stations per unit of energy produced, said it was"another example of why wind farms are difficult and expensive to manage", but industry bodies pointed out that all power stations use electricity as well as generating it.
Compared to thermal solar, the high cost and relatively low energy conversion rate(only 13-15%) is its obvious disadvantage, because thermal solar has average efficiency levels 4-5 times that of PV,and is therefore much cheaper per unit of energy produced.
The committee objectives were to devise a unit that was of convenient size, part of a complete system for electrical measurements,coherent with the units for energy, stable, reproducible and based on the French metrical system8.
English
中文
عربى
Български
বাংলা
Český
Dansk
Deutsch
Ελληνικά
Español
Suomi
Français
עִברִית
हिंदी
Hrvatski
Magyar
Bahasa indonesia
Italiano
Қазақ
한국어
മലയാളം
मराठी
Bahasa malay
Nederlands
Norsk
Polski
Português
Română
Русский
Slovenský
Slovenski
Српски
Svenska
தமிழ்
తెలుగు
ไทย
Tagalog
Turkce
Українська
اردو
Tiếng việt