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| Тема |
 Re: Добре, бе швестър [re: nikant] |
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| Автор |
Aлaдин (търпелив) |
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| Публикувано | 01.04.10 20:42 |
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щом тази дума ти харесва повече.
Аз като пускам линк, поне го прочитам. Ако ти беше прочел този:
щеше да научиш това:
Efficiency
Main article: Thermal efficiency
The efficiency of an engine can be calculated by dividing the energy output of mechanical work that the engine produces by the energy input to the engine by the burning fuel.
No heat engine can be more efficient than the Carnot cycle, in which heat is moved from a high temperature reservoir to one at a low temperature, and the efficiency depends on the temperature difference. For the greatest efficiency, steam engines should be operated at the highest steam temperature possible (superheated steam), and release the waste heat at the lowest temperature possible.
In practice, a steam engine exhausting the steam to atmosphere will typically have an efficiency (including the boiler) in the range of 1% to 10%, but with the addition of a condenser and multiple expansion, it may be greatly improved to 25% or better.
A megawatt electrical power station with steam reheat, economizer etc. will achieve up to 50% thermal efficiency.[16]
It is also possible to capture the waste heat using cogeneration in which the waste heat is used for heating a lower boiling point working fluid or as a heat source for district heating via saturated low pressure steam. By this means it is possible to use as much as 85-90% of the input energy.
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И един съвет - ако се чувстваш напълно неподготвен, по-добре не давай компетентни мнения.
А ако не се чувстваш - проблема е по-голям.
Всичко българско и родно -
любя, тача и милея.
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