請問由發電廠傳送電流到家居會消耗多少%的電力？

由發電廠傳送電流到家居會消耗多少%的電力?

每個國家都唔同, 其實唔係消耗, 係耗損, 通常係40% ~ 50%

就好似一棵樹被砍下來, 只有50% ~ 60%能夠變爲木材, 40% ~ 50% 變成廢料。


2010-11-30 01:15:51 補充：
無論是升壓或降壓，變壓器裏面都會有

1. 銅損
2. 鐵損

記住，是耗損，不是消耗。

2010-11-30 01:18:53 補充：
消耗 = Consumption

耗損 = Losses

傳送電壓超過15萬伏特以上，如此高的電壓其導線電阻幾乎可以忽略。

電力全消耗在功率轉換上。( 升壓與降壓過程 )

I don't think there is a percentage loss of 40~50% as given by the answer above. If this were the case, high tension long distance power transmission would not achieve its purpose.

I don't have any figure for Hong Kong. But the distance over which power is transmitted here is comparatively short, as we have power plants located locally. In the United States, for example, electrical power may transmit, through high tension overhead cables, to several thousands of miles. The transmission and distribution losses were reported to be 6.6% in 1997 and 6.5% in 2007.

The precentage loss would be much lower in Hong Kong given the short transmission distance.

You may refer to the following web-page. Please read the paragraph under "Losses":

http://en.wikipedia.org/wiki/Electric_power_transmission