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(shi)可行的(de)，下面專家針對不(bu)同原(yuan)氨(an)制冷(leng)系統特(te)點、建筑結構、保溫特(te)點、使用要求等(deng)提(ti)供四種(zhong)改造方案供參考(kao)：
第一種：原氨制冷系(xi)統(tong)改(gai)成(cheng)氟(fu)用(yong)桶泵供液制冷系(xi)統(tong)，采用(yong)專(zhuan)用(yong)冷庫(ku)(ku)載冷劑， 適(shi)用(yong)于各類螺旋速(su)凍(dong)機(ji)、隧道式單凍(dong)機(ji)、風冷型速(su)凍(dong)庫(ku)(ku)等制冷系(xi)統(tong)，或將原氨冷庫(ku)(ku)排管(guan)更換(huan)成(cheng)氟(fu)用(yong)排管(guan)系(xi)統(tong)，冷庫(ku)(ku)改(gai)造后(hou)的制冷系(xi)統(tong)具有(you)能效比高、系(xi)統(tong)穩定(ding)、管(guan)理(li)方便等特點。
第(di)二種：原氨制(zhi)冷(leng)(leng)(leng)(leng)系統(tong)改(gai)造成氟(fu)制(zhi)冷(leng)(leng)(leng)(leng)滿液(ye)(ye)式供液(ye)(ye)乙二醇(chun)系統(tong) 保留(liu)原室內(nei)換(huan)(huan)熱(re)(re)器，如庫(ku)內(nei)吊(diao)頂排管(guan)、速凍擱架、冷(leng)(leng)(leng)(leng)風機、制(zhi)冰系統(tong)中的(de)螺旋(xuan)蒸發(fa)管(guan)等(deng)換(huan)(huan)熱(re)(re)蒸發(fa)器設(she)(she)備(bei)，只是將冷(leng)(leng)(leng)(leng)凍機組主機更換(huan)(huan)成我公(gong)司的(de)專用(yong)(yong)制(zhi)冷(leng)(leng)(leng)(leng)機組；制(zhi)取低溫(wen)載冷(leng)(leng)(leng)(leng)劑輸送(song)至室內(nei)換(huan)(huan)熱(re)(re)器進(jin)行(xing)換(huan)(huan)熱(re)(re)，從(cong)而達到(dao)設(she)(she)定(ding)溫(wen)度。具有(you)施工簡單(dan)、改(gai)成周期短(duan)、管(guan)路(lu)方便(bian)、成本低等(deng)特點。溫(wen)度范圍可(ke)(ke)(ke)在+15℃至-150℃進(jin)行(xing)。采用(yong)(yong)載冷(leng)(leng)(leng)(leng)劑間接制(zhi)冷(leng)(leng)(leng)(leng)，不(bu)(bu)存(cun)在直接蒸發(fa)系統(tong)中回油難(nan)(nan)、制(zhi)冷(leng)(leng)(leng)(leng)劑容易泄漏、漏點難(nan)(nan)檢測、分液(ye)(ye)不(bu)(bu)均勻等(deng)難(nan)(nan)題;只需(xu)對制(zhi)冷(leng)(leng)(leng)(leng)主機做(zuo)定(ding)期保養即可(ke)(ke)(ke)，故(gu)(gu)障率低、維修費用(yong)(yong)省。 設(she)(she)備(bei)可(ke)(ke)(ke)根據冷(leng)(leng)(leng)(leng)庫(ku)實際負荷實現25%～100%進(jin)行(xing)能量調(diao)節或高(gao)效(xiao)變頻節能條件，同時(shi)通過冷(leng)(leng)(leng)(leng)凍泵供液(ye)(ye)，不(bu)(bu)存(cun)在壓(ya)力損失、冷(leng)(leng)(leng)(leng)量損失、參數難(nan)(nan)于控制(zhi)等(deng)問題;其可(ke)(ke)(ke)控性強;故(gu)(gu)綜合能效(xiao)比高(gao)。
第(di)三種(zhong)：原氨(an)制冷(leng)系統(tong)改(gai)成以氨(an)系統(tong)為(wei)冷(leng)源專(zhuan)用冷(leng)凍液進末端系統(tong) 保持原先的冷(leng)源不變，通過(guo)增加臥式蒸(zheng)發(fa)器加乙二醇水泵供到末端冷(leng)風(feng)機(ji)。這種(zhong)也是目前最(zui)實惠(hui)一種(zhong)改(gai)造方(fang)案(an)。
第四(si)種：原氨(an)制(zhi)冷(leng)(leng)(leng)(leng)(leng)系(xi)統(tong)(tong)(tong)改成小(xiao)型風冷(leng)(leng)(leng)(leng)(leng)氟利(li)昂(ang)制(zhi)冷(leng)(leng)(leng)(leng)(leng)系(xi)統(tong)(tong)(tong)，有些氨(an)系(xi)統(tong)(tong)(tong)用的車間空(kong)調(diao)和小(xiao)型冷(leng)(leng)(leng)(leng)(leng)庫(ku)，冷(leng)(leng)(leng)(leng)(leng)庫(ku)改造的風冷(leng)(leng)(leng)(leng)(leng)氟利(li)昂(ang)制(zhi)冷(leng)(leng)(leng)(leng)(leng)系(xi)統(tong)(tong)(tong)，制(zhi)冷(leng)(leng)(leng)(leng)(leng)系(xi)統(tong)(tong)(tong)簡(jian)單，故障率低，各個(ge)系(xi)統(tong)(tong)(tong)相互(hu)對立，節能(neng)效果明(ming)顯。 |
