發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)組的(de)(de)使用(yong)(yong)壽命。 　　在(zai)選(xuan)擇柴(chai)油(you)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)出(chu)(chu)租(zu)(zu)時(shi)，可(ke)以事(shi)先測(ce)算好(hao)自己所需(xu)(xu)負荷(he)的(de)(de)大(da)小(xiao)，然后(hou)根據負荷(he)大(da)小(xiao)來選(xuan)購(gou)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)組。 　　1、首先發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)功(gong)(gong)(gong)率(lv)(lv)(lv)有KVA和KW之分(fen)。KVA是(shi)視在(zai)功(gong)(gong)(gong)率(lv)(lv)(lv)，KW是(shi)有效功(gong)(gong)(gong)率(lv)(lv)(lv)，他們之間的(de)(de)關(guan)系是(shi)1KVA=0.8KW，進口機(ji)(ji)組一(yi)般用(yong)(yong)KVA表示(shi)功(gong)(gong)(gong)率(lv)(lv)(lv)單位(wei)，而國內(nei)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)設備(bei)一(yi)般都用(yong)(yong)KW表示(shi)，所以核算功(gong)(gong)(gong)率(lv)(lv)(lv)時(shi)應把(ba)KVA打8折(zhe)換算成(cheng)KW。 　　2、其次(ci)功(gong)(gong)(gong)率(lv)(lv)(lv)還有長(chang)(chang)行(xing)(xing)（額定(ding)）功(gong)(gong)(gong)率(lv)(lv)(lv)和后(hou)備(bei)功(gong)(gong)(gong)率(lv)(lv)(lv)之分(fen)，長(chang)(chang)行(xing)(xing)功(gong)(gong)(gong)率(lv)(lv)(lv)為(wei)(wei)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)可(ke)以連續(xu)(xu)12小(xiao)時(shi)運行(xing)(xing)的(de)(de)功(gong)(gong)(gong)率(lv)(lv)(lv)，而柴(chai)油(you)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)出(chu)(chu)租(zu)(zu)備(bei)功(gong)(gong)(gong)率(lv)(lv)(lv)只能在(zai)12小(xiao)時(shi)連續(xu)(xu)運行(xing)(xing)中運行(xing)(xing)一(yi)小(xiao)時(shi)。 　　3、另外，確定(ding)柴(chai)油(you)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)出(chu)(chu)租(zu)(zu)的(de)(de)功(gong)(gong)(gong)率(lv)(lv)(lv)并(bing)非把(ba)所有用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)器功(gong)(gong)(gong)率(lv)(lv)(lv)簡單相加，還需(xu)(xu)要(yao)考慮(lv)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)器的(de)(de)啟(qi)(qi)(qi)動(dong)方(fang)式。一(yi)般啟(qi)(qi)(qi)動(dong)方(fang)式分(fen)為(wei)(wei)直(zhi)接啟(qi)(qi)(qi)動(dong)和降壓啟(qi)(qi)(qi)動(dong)或變頻啟(qi)(qi)(qi)動(dong)，前者啟(qi)(qi)(qi)動(dong)電(dian)(dian)(dian)(dian)(dian)流為(wei)(wei)工作電(dian)(dian)(dian)(dian)(dian)流6倍(bei)(bei)左(zuo)右(you)，瞬(shun)間功(gong)(gong)(gong)率(lv)(lv)(lv)也(ye)會達到額定(ding)功(gong)(gong)(gong)率(lv)(lv)(lv)6倍(bei)(bei)；后(hou)者啟(qi)(qi)(qi)動(dong)電(dian)(dian)(dian)(dian)(dian)流為(wei)(wei)3倍(bei)(bei)左(zuo)右(you)，瞬(shun)間功(gong)(gong)(gong)率(lv)(lv)(lv)也(ye)為(wei)(wei)額定(ding)功(gong)(gong)(gong)率(lv)(lv)(lv)3倍(bei)(bei)。因此，選(xuan)擇柴(chai)油(you)發(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)出(chu)(chu)租(zu)(zu)功(gong)(gong)(gong)率(lv)(lv)(lv)時(shi)，除了(le)需(xu)(xu)要(yao)考慮(lv)所有用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)器功(gong)(gong)(gong)