雖然電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)不(bu)像CPU和顯卡(ka)一(yi)(yi)樣(yang)設有溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)傳感器，不(bu)過(guo)(guo)從機箱后部電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)風(feng)(feng)(feng)口(kou)的(de)(de)(de)(de)位(wei)置(zhi)還是很(hen)容(rong)易(yi)測(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)(de)(de)。現在(zai)(zai)的(de)(de)(de)(de)萬用表(biao)一(yi)(yi)般(ban)帶有溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)探頭，把(ba)萬用表(biao)的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)探頭用塑料之內的(de)(de)(de)(de)絕緣(yuan)材料包裹(guo)一(yi)(yi)下，從機箱后部電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)(de)(de)位(wei)置(zhi)伸入(ru)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)內，只要(yao)有時(shi)間(jian)和耐心(xin)，可(ke)(ke)以測(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)多(duo)(duo)個位(wei)置(zhi)的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)。而采用紅外(wai)(wai)測(ce)(ce)溫(wen)(wen)(wen)(wen)(wen)(wen)儀可(ke)(ke)以對(dui)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)各(ge)處(chu)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)進(jin)行全(quan)方位(wei)的(de)(de)(de)(de)快(kuai)速(su)測(ce)(ce)量，只須(xu)從機箱后部把(ba)紅外(wai)(wai)測(ce)(ce)溫(wen)(wen)(wen)(wen)(wen)(wen)儀對(dui)準電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)內部的(de)(de)(de)(de)各(ge)個部位(wei)，就可(ke)(ke)以方便快(kuai)捷地讀取電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)內部各(ge)處(chu)的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)。測(ce)(ce)試(shi)表(biao)明，集(ji)中供(gong)氣(qi)新(xin)風(feng)(feng)(feng)散(san)(san)(san)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)腦(nao)(nao)的(de)(de)(de)(de)無風(feng)(feng)(feng)扇(shan)(shan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)比(bi)同功率的(de)(de)(de)(de)有風(feng)(feng)(feng)扇(shan)(shan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)低(di)很(hen)多(duo)(duo)，5～10度(du)(du)的(de)(de)(de)(de)樣(yang)子，和上面的(de)(de)(de)(de)分析(xi)大(da)體(ti)吻合。這(zhe)說明，在(zai)(zai)集(ji)中供(gong)氣(qi)新(xin)風(feng)(feng)(feng)散(san)(san)(san)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)腦(nao)(nao)中，無風(feng)(feng)(feng)扇(shan)(shan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)(de)(de)成(cheng)本(ben)和傳統的(de)(de)(de)(de)有風(feng)(feng)(feng)扇(shan)(shan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)大(da)致(zhi)(zhi)相當(dang)　　當(dang)電(dian)(dian)(dian)(dian)(dian)腦(nao)(nao)散(san)(san)(san)熱(re)(re)進(jin)入(ru)了以人為本(ben)的(de)(de)(de)(de)時(shi)代，過(guo)(guo)高的(de)(de)(de)(de)風(feng)(feng)(feng)扇(shan)(shan)轉(zhuan)速(su)由(you)于明顯的(de)(de)(de)(de)噪音而失去實(shi)際價(jia)值，基本(ben)上只在(zai)(zai)媒體(ti)的(de)(de)(de)(de)評(ping)測(ce)(ce)中見(jian)到；當(dang)電(dian)(dian)(dian)(dian)(dian)腦(nao)(nao)散(san)(san)(san)熱(re)(re)進(jin)入(ru)多(duo)(duo)核時(shi)代，過(guo)(guo)低(di)的(de)(de)(de)(de)風(feng)(feng)(feng)扇(shan)(shan)轉(zhuan)速(su)由(you)于增加了對(dui)散(san)(san)(san)熱(re)(re)器體(ti)積的(de)(de)(de)(de)要(yao)求而受到各(ge)種限制，在(zai)(zai)實(shi)際中也(ye)很(hen)難見(jian)到。可(ke)(ke)見(jian)，一(yi)(yi)個適中的(de)(de)(de)(de)風(feng)(feng)(feng)扇(shan)(shan)轉(zhuan)速(su)是所(suo)有靜(jing)音電(dian)(dian)(dian)(dian)(dian)腦(nao)(nao)的(de)(de)(de)(de)基本(ben)要(yao)求，在(zai)(zai)此基礎(chu)上，追求電(dian)(dian)(dian)(dian)(dian)腦(nao)(nao)的(de)(de)(de)(de)極(ji)致(zhi)(zhi)靜(jing)音還必須(xu)進(jin)一(yi)(yi)步減少風(feng)(feng)(feng)扇(shan)(shan)的(de)(de)(de)(de)數量。

　　集中(zhong)(zhong)供(gong)氣(qi)新風散熱電(dian)腦取(qu)得靜(jing)音(yin)(yin)突破的(de)(de)(de)關(guan)鍵在(zai)于實(shi)現了(le)電(dian)腦散熱的(de)(de)(de)集中(zhong)(zhong)供(gong)氣(qi)和(he)新風散熱，和(he)樓宇的(de)(de)(de)中(zhong)(zhong)央空調(diao)有(you)異曲同工之(zhi)妙(miao)，無須(xu)像傳統(tong)電(dian)腦在(zai)電(dian)源、CPU和(he)顯卡上安(an)裝(zhuang)風扇(shan)(shan)(shan)進行單獨(du)供(gong)氣(qi)。集中(zhong)(zhong)供(gong)氣(qi)新風散熱電(dian)腦講究以適(shi)量(liang)的(de)(de)(de)風扇(shan)(shan)(shan)，適(shi)中(zhong)(zhong)的(de)(de)(de)轉速(su)來取(qu)得電(dian)腦的(de)(de)(de)靜(jing)音(yin)(yin)和(he)散熱之(zhi)間(jian)(jian)的(de)(de)(de)平衡(heng)。適(shi)量(liang)風扇(shan)(shan)(shan)的(de)(de)(de)最少數(shu)字是(shi)(shi)一(yi)個(ge)(ge)；適(shi)中(zhong)(zhong)的(de)(de)(de)轉速(su)對120mm風扇(shan)(shan)(shan)來說是(shi)(shi)1300rpm左右(you)，對180mm風扇(shan)(shan)(shan)來說是(shi)(shi)900rpm左右(you)。在(zai)適(shi)中(zhong)(zhong)的(de)(de)(de)轉速(su)下，口(kou)徑大(da)的(de)(de)(de)風扇(shan)(shan)(shan)比(bi)口(kou)徑小的(de)(de)(de)有(you)更好的(de)(de)(de)散熱效(xiao)果，多(duo)個(ge)(ge)風扇(shan)(shan)(shan)比(bi)單個(ge)(ge)風扇(shan)(shan)(shan)有(you)更好的(de)(de)(de)散熱效(xiao)果。追(zhui)求極(ji)致(zhi)(zhi)靜(jing)音(yin)(yin)效(xiao)果的(de)(de)(de)，可以采用一(yi)個(ge)(ge)風扇(shan)(shan)(shan)；追(zhui)求極(ji)致(zhi)(zhi)散熱效(xiao)果的(de)(de)(de)，可以采用大(da)口(kou)徑風扇(shan)(shan)(shan)或多(duo)個(ge)(ge)風扇(shan)(shan)(shan)。也(ye)就是(shi)(shi)說，氣(qi)壓差(cha)整體散熱不僅能靜(jing)音(yin)(yin)和(he)散熱兼顧，而且在(zai)靜(jing)音(yin)(yin)和(he)散熱之(zhi)間(jian)(jian)還具(ju)有(you)相當程(cheng)度(du)的(de)(de)(de)靈活性。

　　集中(zhong)供氣新風散(san)熱系統的(de)散(san)熱和(he)排(pai)熱能力可(ke)以按如下的(de)方法計算。

　　以計(ji)算機里常見的(de)口徑(jing)120mm風扇(shan)(shan)為(wei)(wei)(wei)例(li)，其(qi)風量(liang)(liang)在轉(zhuan)速為(wei)(wei)(wei)1300rpm時(shi)大概為(wei)(wei)(wei)50CFM（Cubic Feet per Minute，1CFM＝4.72×10-4m3／s）。設(she)氣(qi)流進入機箱時(shi)的(de)溫(wen)度為(wei)(wei)(wei)28℃，排(pai)(pai)出機箱時(shi)的(de)溫(wen)度為(wei)(wei)(wei)38℃，溫(wen)差為(wei)(wei)(wei)10℃（或K），則(ze)單位時(shi)間里口徑(jing)120mm的(de)風扇(shan)(shan)向機箱外排(pai)(pai)出的(de)熱(re)量(liang)(liang)為(wei)(wei)(wei)：(空氣(qi)的(de)比(bi)(bi)熱(re):1.005J／g.K，空氣(qi)的(de)比(bi)(bi)重:1290g／m3)

　　＝1.005×（50×4.72×10-4×1290）×10

　　＝305.96瓦

　　目前(qian)，絕大多數的計(ji)算機的發熱(re)(re)量都在300瓦以(yi)下，尤(you)其一(yi)般配置的計(ji)算機，其整(zheng)機功率(lv)才200瓦左右，發熱(re)(re)量遠到(dao)不了300瓦。

　　上面這個公式從系(xi)統(tong)(tong)的角度(du)描述了集中供氣(qi)(qi)(qi)(qi)新風(feng)散(san)(san)熱(re)(re)(re)(re)(re)系(xi)統(tong)(tong)，氣(qi)(qi)(qi)(qi)流相當(dang)于(yu)輸入，氣(qi)(qi)(qi)(qi)流帶(dai)走的熱(re)(re)(re)(re)(re)量相當(dang)于(yu)輸出，比(bi)熱(re)(re)(re)(re)(re)相當(dang)于(yu)系(xi)統(tong)(tong)函數。當(dang)然，在設計(ji)(ji)集中供氣(qi)(qi)(qi)(qi)新風(feng)散(san)(san)熱(re)(re)(re)(re)(re)系(xi)統(tong)(tong)中的電源，CPU無風(feng)扇散(san)(san)熱(re)(re)(re)(re)(re)裝(zhuang)置，顯卡(ka)無風(feng)扇散(san)(san)熱(re)(re)(re)(re)(re)裝(zhuang)置的時候，還(huan)要(yao)用到熱(re)(re)(re)(re)(re)設計(ji)(ji)理論(lun)。在熱(re)(re)(re)(re)(re)設計(ji)(ji)理論(lun)中，有風(feng)扇的散(san)(san)熱(re)(re)(re)(re)(re)器(qi)的散(san)(san)熱(re)(re)(re)(re)(re)能力(li)與(yu)(yu)散(san)(san)熱(re)(re)(re)(re)(re)器(qi)的散(san)(san)熱(re)(re)(re)(re)(re)面積成正(zheng)比(bi)，與(yu)(yu)氣(qi)(qi)(qi)(qi)流流量成正(zheng)比(bi)，與(yu)(yu)散(san)(san)熱(re)(re)(re)(re)(re)器(qi)表面與(yu)(yu)氣(qi)(qi)(qi)(qi)流之間的溫差成正(zheng)比(bi)，據此可(ke)以進行散(san)(san)熱(re)(re)(re)(re)(re)器(qi)大小(xiao)的規劃和氣(qi)(qi)(qi)(qi)流流量的分配。

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