kouyoumin
2011-03-23, 10:28 AM
耗電以10瓦計算,每月耗電量大約7200瓦,以每度3元計算就是21.6元了
應該是7200"瓦時"(Wh)
瓦是功率單位, 瓦時才是能量單位
一度電是1000"瓦時"
再以全台500萬個網路用戶計算(FTTB VDSL+ADSL+CM)每小時耗電約50百萬瓦
不會是"每小時"
瓦=焦耳/秒
"每小時"50百萬瓦=50百萬焦耳/(秒*時)
分母為時間平方會變成一個增加率的單位
(類似速度/時間=加速度那種感覺)
關於watts per hour (http://en.wikipedia.org/wiki/Watt#Confusion_of_watts.2C_watt-hours.2C_and_watts_per_hour)的解說:
Terms such as watts per hour are often misused. Watts per hour properly refers to the change of power per hour. Watts per hour (W/h) might be useful to characterize the ramp-up behavior of power plants. For example, a power plant that reaches a power output of 1 MW from 0 MW in 15 minutes has a ramp-up rate of 4 MW/h. Hydroelectric power plants have a very high ramp-up rate, which makes them particularly useful in peak load and emergency situations.
應該是7200"瓦時"(Wh)
瓦是功率單位, 瓦時才是能量單位
一度電是1000"瓦時"
再以全台500萬個網路用戶計算(FTTB VDSL+ADSL+CM)每小時耗電約50百萬瓦
不會是"每小時"
瓦=焦耳/秒
"每小時"50百萬瓦=50百萬焦耳/(秒*時)
分母為時間平方會變成一個增加率的單位
(類似速度/時間=加速度那種感覺)
關於watts per hour (http://en.wikipedia.org/wiki/Watt#Confusion_of_watts.2C_watt-hours.2C_and_watts_per_hour)的解說:
Terms such as watts per hour are often misused. Watts per hour properly refers to the change of power per hour. Watts per hour (W/h) might be useful to characterize the ramp-up behavior of power plants. For example, a power plant that reaches a power output of 1 MW from 0 MW in 15 minutes has a ramp-up rate of 4 MW/h. Hydroelectric power plants have a very high ramp-up rate, which makes them particularly useful in peak load and emergency situations.