電動車能源效率 - 機車

By Irma
at 2018-10-02T14:40
at 2018-10-02T14:40
Table of Contents
gogoro一台兩顆電池1.37kWh x2 x0.8(通常不會放到乾) x3600s/hr = 7.9MJ
就算整天一敗大概還可騎50km => 158kJ/km
汽油一公升34.2MJ/L,黃金右手給你個50km/L => 684kJ/km
試問電廠發電+輸電效率+電池(只算充電)效率要有多低才能讓電車不比汽油環保?
更別提生產汽油也消耗了不少能源
為什麼明明電機效率加上一堆林林總總也不高,但是能量效率差這麼多?
引擎在非全油門運轉時的效率不是低,是廢到笑
一台機車維持50kph只需要1~1.5ps就很夠,但是在這時通常有5krpm了
拿可以跑出5ps以上的轉速指實際輸出1ps
已經不是之前有人算速克達傳動效率的的9%,有3~5%已經偷笑
畢竟維持轉速車速就需要那麼多的進氣量&汽油量(汽車在這部分可以靠EGR部分克服)
同理省油的汽車現在都靠渦輪加壓讓引擎轉速越低越好,外加7~9AT變速箱
檔車相對省油也是因為即使車速不快也能用高檔位拖
速克達沒有強制升檔無解
相反的,電動車的油門不是真的你轉多深他就給馬達多少能量
只是模仿汽油車的動力曲線,綜合目前車速和油門位置模擬出"油門"的感覺
不然車速起來後要把油門越關越小很不直覺
在等速時電動效率>>汽油內燃機
--
就算整天一敗大概還可騎50km => 158kJ/km
汽油一公升34.2MJ/L,黃金右手給你個50km/L => 684kJ/km
試問電廠發電+輸電效率+電池(只算充電)效率要有多低才能讓電車不比汽油環保?
更別提生產汽油也消耗了不少能源
為什麼明明電機效率加上一堆林林總總也不高,但是能量效率差這麼多?
引擎在非全油門運轉時的效率不是低,是廢到笑
一台機車維持50kph只需要1~1.5ps就很夠,但是在這時通常有5krpm了
拿可以跑出5ps以上的轉速指實際輸出1ps
已經不是之前有人算速克達傳動效率的的9%,有3~5%已經偷笑
畢竟維持轉速車速就需要那麼多的進氣量&汽油量(汽車在這部分可以靠EGR部分克服)
同理省油的汽車現在都靠渦輪加壓讓引擎轉速越低越好,外加7~9AT變速箱
檔車相對省油也是因為即使車速不快也能用高檔位拖
速克達沒有強制升檔無解
相反的,電動車的油門不是真的你轉多深他就給馬達多少能量
只是模仿汽油車的動力曲線,綜合目前車速和油門位置模擬出"油門"的感覺
不然車速起來後要把油門越關越小很不直覺
在等速時電動效率>>汽油內燃機
--
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