由于廠(chang)(chang)房很(hen)寬，僅靠(kao)兩(liang)側外(wai)墻進(jin)氣(qi)(qi)(qi)，不(bu)(bu)但進(jin)氣(qi)(qi)(qi)口(kou)面積(ji)(ji)無(wu)法滿(man)足要求(qiu)，而(er)且進(jin)氣(qi)(qi)(qi)深度也(ye)遠遠無(wu)法達到(dao)。對于廠(chang)(chang)房中部(bu)而(er)言(yan)，無(wu)可避免地將形(xing)成全面進(jin)氣(qi)(qi)(qi)短流。此種情(qing)(qing)況下，如(ru)果不(bu)(bu)采(cai)取(qu)有(you)效(xiao)措施，只(zhi)是(shi)勉強通(tong)(tong)(tong)(tong)過自然(ran)(ran)通(tong)(tong)(tong)(tong)風(feng)計(ji)算(suan)求(qiu)得天窗(chuang)面積(ji)(ji)，再多的(de)(de)(de)人窗(chuang)也(ye)難以滿(man)足要求(qiu)。必須廣開(kai)思路(lu)(lu)、另辟(pi)新徑(jing)，采(cai)取(qu)有(you)效(xiao)措施是(shi)自然(ran)(ran)通(tong)(tong)(tong)(tong)風(feng)設計(ji)的(de)(de)(de)出路(lu)(lu)。不(bu)(bu)應忽視冷(leng)加工(gong)廠(chang)(chang)房的(de)(de)(de)通(tong)(tong)(tong)(tong)風(feng)換氣(qi)(qi)(qi)問(wen)(wen)題在(zai)廠(chang)(chang)房自然(ran)(ran)通(tong)(tong)(tong)(tong)風(feng)設計(ji)中，存(cun)在(zai)一個誤區，即一提到(dao)自然(ran)(ran)通(tong)(tong)(tong)(tong)風(feng)，就只(zhi)是(shi)與熱(re)車問(wen)(wen)有(you)關的(de)(de)(de)事情(qing)(qing)。因(yin)冷(leng)加工(gong)廠(chang)(chang)房內不(bu)(bu)散發(fa)余熱(re)或(huo)僅散發(fa)很(hen)小的(de)(de)(de)熱(re)量，使當(dang)前按熱(re)壓作用進(jin)行自然(ran)(ran)通(tong)(tong)(tong)(tong)風(feng)器通(tong)(tong)(tong)(tong)風(feng)設計(ji)計(ji)算(suan)的(de)(de)(de)，失去了依據。因(yin)而(er)也(ye)就很(hen)少有(you)人問(wen)(wen)津冷(leng)加工(gong)廠(chang)(chang)房的(de)(de)(de)通(tong)(tong)(tong)(tong)風(feng)換氣(qi)(qi)(qi)問(wen)(wen)題。

　　筆者曾對(dui)我國南方地(di)(di)區的(de)一些(xie)冷加(jia)工(gong)廠房(fang)的(de)夏季室(shi)內熱環境(jing)，做(zuo)過專(zhuan)門調查.調查中發現(xian)，重(zhong)慶、武漢、湖南、太原等夏季氣(qi)溫(wen)較高地(di)(di)區的(de)絕(jue)大(da)多(duo)數(shu)冷加(jia)工(gong)廠房(fang)的(de)夏季室(shi)內熱環境(jing)質(zhi)量很差(cha)。盡管廠房(fang)內散發的(de)生產余熱很小(xiao)，但(dan)由于屋面輻射(she)熱和通風(feng)換氣(qi)不(bu)良(liang)，導致悶熱難當，且油污氣(qi)味令人(ren)難忍(ren)。工(gong)人(ren)叫苦連天，竹(zhu)遍反(fan)映有(you)頭(tou)暈、煩燥、等癥狀。

　　而(er)屋頂設(she)(she)置了(le)采(cai)光(guang)(guang)人窗(chuang)的(de)(de)廠房(fang)，由(you)于部分玻璃窗(chuang)扇(shan)為(wei)開啟狀態，起到通(tong)(tong)風(feng)換(huan)(huan)氣作用，其(qi)室(shi)內熱環境(jing)明(ming)顯要(yao)好得多。因此，對于南方(fang)地區及北方(fang)夏(xia)熱地區的(de)(de)冷加工廠房(fang)，除了(le)必須設(she)(she)置屋面隔熱層之外，設(she)(she)計上還必須創造良好的(de)(de)通(tong)(tong)風(feng)換(huan)(huan)氣條(tiao)件。兩跨及以(yi)(yi)(yi)下廠房(fang)，可以(yi)(yi)(yi)利用高側(ce)窗(chuang)進行通(tong)(tong)風(feng)換(huan)(huan)氣，多跨廠房(fang)則必須結(jie)合采(cai)光(guang)(guang)需(xu)要(yao)，設(she)(she)置足夠的(de)(de)天窗(chuang)，以(yi)(yi)(yi)解決通(tong)(tong)風(feng)換(huan)(huan)氣及采(cai)光(guang)(guang)問題。