一、什么是蒸發式冷凝器
蒸發(fa)式冷凝(ning)器是用于(yu)冷庫(ku)降溫(wen)的一種(zhong)換熱(re)裝置,由風機、冷凝(ning)盤管、換熱(re)片、箱體等部件組合(he)而成。
蒸發式冷凝器(Evaporative condenser)又叫蒸發冷、冷卻(凝)器,是由(you)制(zhi)(zhi)冷(leng)利用盤管外的(de)噴淋水(shui)部分(fen)蒸發(fa)時吸(xi)收盤管內高(gao)溫氣態制(zhi)(zhi)冷(leng)劑的(de)熱(re)量而使管內的(de)制(zhi)(zhi)冷(leng)劑逐漸(jian)由(you)氣態被冷(leng)卻(que)為(wei)液態的(de)一種設備。
二、蒸發式冷凝器工作原理是什么
1、工作原理
蒸發式冷(leng)(leng)凝(ning)器是制冷(leng)(leng)系(xi)統中(zhong)的主要換熱設(she)備(bei),它的作用原理是:
制(zhi)冷系(xi)統(tong)中壓縮機排出的(de)(de)過(guo)熱(re)高(gao)壓制(zhi)冷劑氣(qi)(qi)體經過(guo)蒸發式冷凝器中的(de)(de)冷凝排管(guan),使高(gao)溫(wen)氣(qi)(qi)態(tai)的(de)(de)制(zhi)冷劑與排管(guan)外的(de)(de)噴淋(lin)水(shui)和空(kong)氣(qi)(qi)進行熱(re)交換。即氣(qi)(qi)態(tai)制(zhi)冷劑由上口進入排管(guan)后自上而下(xia)逐漸被冷凝為液(ye)態(tai)制(zhi)冷劑。配套引風機的(de)(de)超強風力使噴淋(lin)水(shui)完全均勻地覆蓋在盤管(guan)表面,水(shui)借風勢,極(ji)大(da)的(de)(de)提高(gao)了換熱(re)效果。
溫(wen)(wen)度(du)(du)升高的(de)噴淋(lin)水(shui)(shui)(shui)由部分(fen)變為(wei)氣態,利(li)用水(shui)(shui)(shui)的(de)汽化(hua)潛熱(re)(re)由風勢帶走大量(liang)(liang)的(de)熱(re)(re)量(liang)(liang),熱(re)(re)氣中(zhong)的(de)水(shui)(shui)(shui)滴被(bei)高效脫水(shui)(shui)(shui)器(qi)截住,與其(qi)余吸收(shou)了(le)熱(re)(re)量(liang)(liang)的(de)水(shui)(shui)(shui),散落到(dao)PVC淋(lin)水(shui)(shui)(shui)片熱(re)(re)交(jiao)換(huan)層中(zhong),被(bei)流過(guo)的(de)空氣冷卻,溫(wen)(wen)度(du)(du)降低,進入(ru)水(shui)(shui)(shui)箱(xiang),再經循環(huan)水(shui)(shui)(shui)泵繼續循環(huan)。蒸(zheng)發到(dao)空氣中(zhong)的(de)水(shui)(shui)(shui)分(fen)由水(shui)(shui)(shui)位調節(jie)器(qi)自動補充。
換熱管采用多種形式,常用的有碳鋼熱浸鋅管(又分圓管和橢圓管)、鋁合金管、不銹鋼管(又分314/316圓管、波接管);其中碳鋼熱浸鋅型蒸發式冷凝器為最早開始使(shi)用(yong)(yong)的產品且占有國(guo)內大部(bu)分的用(yong)(yong)戶主要(yao)用(yong)(yong)于高壓氣(qi)(qi)體(ti)冷(leng)(leng)凝(ning)、冷(leng)(leng)卻,適用(yong)(yong)壓力(li)范圍在(zai)0—30MPa;鋁(lv)合金型(xing)蒸發式(shi)(shi)冷(leng)(leng)凝(ning)器為新(xin)型(xing)節能型(xing)新(xin)一代產品適用(yong)(yong)于冰機制冷(leng)(leng)劑冷(leng)(leng)凝(ning),適用(yong)(yong)壓力(li)范圍在(zai)0—5MPa;不銹鋼管蒸發式(shi)(shi)冷(leng)(leng)凝(ning)器主要(yao)用(yong)(yong)在(zai)一些化(hua)工廠的腐蝕(shi)性氣(qi)(qi)體(ti)冷(leng)(leng)卻及冷(leng)(leng)凝(ning)工藝中。
2、運行原理
噴(pen)淋(lin)水(shui)(shui)(shui)由水(shui)(shui)(shui)泵將(jiang)集水(shui)(shui)(shui)槽中的水(shui)(shui)(shui)輸送到蒸發式冷凝器頂部的噴(pen)淋(lin)管,經噴(pen)嘴噴(pen)淋(lin)到冷凝排管的外表面形成(cheng)很薄的水(shui)(shui)(shui)膜,水(shui)(shui)(shui)膜中部分水(shui)(shui)(shui)吸熱后(hou)蒸發為水(shui)(shui)(shui)蒸氣(qi),其余落入(ru)集水(shui)(shui)(shui)槽,供水(shui)(shui)(shui)泵循環使用。
軸流風(feng)機強(qiang)迫空氣(qi)從(cong)頂部(bu)(bu)和側(ce)壁下部(bu)(bu)被吸入(ru)流經盤管(guan),填(tian)料、飽(bao)和熱濕(shi)空氣(qi)則(ze)被排到周圍大(da)氣(qi)中(zhong)(zhong),熱濕(shi)空氣(qi)中(zhong)(zhong)夾帶的部(bu)(bu)分水(shui)(shui)(shui)滴通過(guo)收水(shui)(shui)(shui)器截(jie)留(liu),有(you)效地(di)控制(zhi)水(shui)(shui)(shui)滴飄散損失,散失致大(da)氣(qi)中(zhong)(zhong)的水(shui)(shui)(shui)蒸氣(qi)在系(xi)統(tong)中(zhong)(zhong)由浮(fu)球閥控制(zhi)補充冷(leng)卻水(shui)(shui)(shui)。