國家對冷庫涉氨企業要求嚴格，這其實是對氨用冷庫的使用操作的一個嚴格規范，但有些企業為了避免麻煩而選擇冷庫改造氨改氟，根據制冷專家認為，氟制冷是較適合于小型冷庫，大中型冷庫使用氨制冷較長遠。小型冷庫氨(an)改氟也是可行的，下面專家針(zhen)對不同原氨(an)制冷系統(tong)特點、建筑結構、保溫特點、使用要求等提(ti)供四種改造方(fang)案(an)供參考：
第一種：原氨(an)(an)制(zhi)(zhi)冷(leng)(leng)(leng)系(xi)統(tong)(tong)改(gai)成(cheng)氟用(yong)(yong)桶泵供(gong)液制(zhi)(zhi)冷(leng)(leng)(leng)系(xi)統(tong)(tong)，采用(yong)(yong)專用(yong)(yong)冷(leng)(leng)(leng)庫(ku)(ku)載冷(leng)(leng)(leng)劑， 適(shi)用(yong)(yong)于各類(lei)螺旋速凍機(ji)、隧道式單凍機(ji)、風冷(leng)(leng)(leng)型速凍庫(ku)(ku)等制(zhi)(zhi)冷(leng)(leng)(leng)系(xi)統(tong)(tong)，或將原氨(an)(an)冷(leng)(leng)(leng)庫(ku)(ku)排(pai)(pai)管(guan)更(geng)換成(cheng)氟用(yong)(yong)排(pai)(pai)管(guan)系(xi)統(tong)(tong)，冷(leng)(leng)(leng)庫(ku)(ku)改(gai)造(zao)后(hou)的制(zhi)(zhi)冷(leng)(leng)(leng)系(xi)統(tong)(tong)具(ju)有能效比高、系(xi)統(tong)(tong)穩定(ding)、管(guan)理方便等特點。
第(di)二(er)種：原(yuan)(yuan)氨(an)制(zhi)(zhi)冷(leng)(leng)(leng)系(xi)統(tong)(tong)改(gai)造成(cheng)氟制(zhi)(zhi)冷(leng)(leng)(leng)滿液式(shi)供(gong)液乙二(er)醇系(xi)統(tong)(tong) 保留原(yuan)(yuan)室內(nei)換(huan)熱(re)(re)器(qi)，如庫內(nei)吊頂排(pai)管(guan)(guan)、速(su)凍擱(ge)架(jia)、冷(leng)(leng)(leng)風機(ji)、制(zhi)(zhi)冰系(xi)統(tong)(tong)中的螺旋蒸發(fa)管(guan)(guan)等換(huan)熱(re)(re)蒸發(fa)器(qi)設備(bei)，只是將冷(leng)(leng)(leng)凍機(ji)組(zu)主機(ji)更換(huan)成(cheng)我公(gong)司(si)的專用制(zhi)(zhi)冷(leng)(leng)(leng)機(ji)組(zu)；制(zhi)(zhi)取低(di)(di)溫(wen)載(zai)冷(leng)(leng)(leng)劑(ji)輸送至(zhi)室內(nei)換(huan)熱(re)(re)器(qi)進行(xing)(xing)換(huan)熱(re)(re)，從(cong)而達到設定(ding)溫(wen)度。具有施工簡單、改(gai)成(cheng)周(zhou)期(qi)短、管(guan)(guan)路方便、成(cheng)本低(di)(di)等特點(dian)。溫(wen)度范圍(wei)可(ke)在(zai)+15℃至(zhi)-150℃進行(xing)(xing)。采用載(zai)冷(leng)(leng)(leng)劑(ji)間接制(zhi)(zhi)冷(leng)(leng)(leng)，不(bu)(bu)存在(zai)直接蒸發(fa)系(xi)統(tong)(tong)中回(hui)油難(nan)、制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)容(rong)易泄漏、漏點(dian)難(nan)檢測(ce)、分液不(bu)(bu)均(jun)勻等難(nan)題;只需對制(zhi)(zhi)冷(leng)(leng)(leng)主機(ji)做(zuo)定(ding)期(qi)保養即可(ke)，故障率低(di)(di)、維修(xiu)費用省。 設備(bei)可(ke)根據冷(leng)(leng)(leng)庫實際負(fu)荷實現25%～100%進行(xing)(xing)能(neng)量調(diao)節或高(gao)效(xiao)(xiao)變頻節能(neng)條件，同(tong)時通過冷(leng)(leng)(leng)凍泵(beng)供(gong)液，不(bu)(bu)存在(zai)壓力損失、冷(leng)(leng)(leng)量損失、參數難(nan)于控制(zhi)(zhi)等問題;其可(ke)控性強(qiang);故綜合(he)能(neng)效(xiao)(xiao)比高(gao)。
第三種：原氨制(zhi)冷(leng)系統(tong)改成以氨系統(tong)為冷(leng)源專用冷(leng)凍(dong)液(ye)進末(mo)端(duan)系統(tong) 保(bao)持原先(xian)的冷(leng)源不變，通(tong)過增加(jia)臥(wo)式蒸發(fa)器加(jia)乙二醇水(shui)泵供到末(mo)端(duan)冷(leng)風機。這(zhe)種也(ye)是(shi)目前最實(shi)惠一種改造方案。
第四種：原氨制(zhi)冷系(xi)(xi)(xi)統(tong)(tong)(tong)改(gai)成小型風(feng)冷氟(fu)利(li)昂制(zhi)冷系(xi)(xi)(xi)統(tong)(tong)(tong)，有些氨系(xi)(xi)(xi)統(tong)(tong)(tong)用(yong)的車間(jian)空(kong)調和小型冷庫，冷庫改(gai)造的風(feng)冷氟(fu)利(li)昂制(zhi)冷系(xi)(xi)(xi)統(tong)(tong)(tong)，制(zhi)冷系(xi)(xi)(xi)統(tong)(tong)(tong)簡單，故障率低，各個系(xi)(xi)(xi)統(tong)(tong)(tong)相互(hu)對立，節能(neng)效果明顯。 |
