一、什么是蒸發式冷凝器
蒸發式冷凝器是用(yong)于(yu)冷庫降溫的一種換熱(re)裝置(zhi),由風機、冷凝盤(pan)管、換熱(re)片、箱體等部件(jian)組合而成。
蒸發式冷凝器(Evaporative condenser)又叫蒸發冷、冷卻(凝)器,是由(you)制冷(leng)(leng)利用(yong)盤管(guan)外的噴淋水部分蒸發時吸收(shou)盤管(guan)內高溫氣(qi)態(tai)制冷(leng)(leng)劑的熱量(liang)而使管(guan)內的制冷(leng)(leng)劑逐漸由(you)氣(qi)態(tai)被(bei)冷(leng)(leng)卻為液態(tai)的一種設備。
二、蒸發式冷凝器工作原理是什么
1、工作原理
蒸發(fa)式冷凝器是制(zhi)冷系統(tong)中(zhong)的(de)主(zhu)要換(huan)熱設備(bei),它的(de)作(zuo)用原理是:
制(zhi)(zhi)(zhi)冷(leng)系統(tong)中壓縮機(ji)排(pai)出的過熱(re)高壓制(zhi)(zhi)(zhi)冷(leng)劑氣(qi)體經過蒸發式冷(leng)凝器中的冷(leng)凝排(pai)管,使(shi)高溫氣(qi)態的制(zhi)(zhi)(zhi)冷(leng)劑與排(pai)管外(wai)的噴(pen)淋(lin)水(shui)和空氣(qi)進(jin)行熱(re)交換。即氣(qi)態制(zhi)(zhi)(zhi)冷(leng)劑由上口進(jin)入(ru)排(pai)管后自上而下(xia)逐漸被冷(leng)凝為(wei)液態制(zhi)(zhi)(zhi)冷(leng)劑。配套引風機(ji)的超強風力使(shi)噴(pen)淋(lin)水(shui)完(wan)全均勻地覆蓋在(zai)盤(pan)管表面,水(shui)借風勢,極大的提高了換熱(re)效果。
溫度升(sheng)高(gao)的(de)(de)(de)噴淋水(shui)(shui)(shui)(shui)(shui)由部分(fen)(fen)變為氣態,利用水(shui)(shui)(shui)(shui)(shui)的(de)(de)(de)汽化潛熱(re)由風(feng)勢帶走大(da)量的(de)(de)(de)熱(re)量,熱(re)氣中的(de)(de)(de)水(shui)(shui)(shui)(shui)(shui)滴(di)被高(gao)效脫水(shui)(shui)(shui)(shui)(shui)器截住,與其余吸收了熱(re)量的(de)(de)(de)水(shui)(shui)(shui)(shui)(shui),散(san)落到PVC淋水(shui)(shui)(shui)(shui)(shui)片(pian)熱(re)交換層中,被流過的(de)(de)(de)空氣冷(leng)卻,溫度降低,進入水(shui)(shui)(shui)(shui)(shui)箱(xiang),再經循環(huan)(huan)水(shui)(shui)(shui)(shui)(shui)泵繼續循環(huan)(huan)。蒸發(fa)到空氣中的(de)(de)(de)水(shui)(shui)(shui)(shui)(shui)分(fen)(fen)由水(shui)(shui)(shui)(shui)(shui)位調(diao)節(jie)器自(zi)動(dong)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(wei)最早(zao)開始使用(yong)(yong)(yong)的產品且占(zhan)有國內(nei)大部(bu)分的用(yong)(yong)(yong)戶主要(yao)用(yong)(yong)(yong)于(yu)高壓氣體冷(leng)(leng)凝、冷(leng)(leng)卻,適用(yong)(yong)(yong)壓力范圍在0—30MPa;鋁合金型(xing)蒸發(fa)式(shi)冷(leng)(leng)凝器(qi)為(wei)新型(xing)節能型(xing)新一代產品適用(yong)(yong)(yong)于(yu)冰(bing)機制冷(leng)(leng)劑冷(leng)(leng)凝,適用(yong)(yong)(yong)壓力范圍在0—5MPa;不銹鋼管(guan)蒸發(fa)式(shi)冷(leng)(leng)凝器(qi)主要(yao)用(yong)(yong)(yong)在一些(xie)化(hua)工廠的腐蝕性氣體冷(leng)(leng)卻及冷(leng)(leng)凝工藝中。
2、運行原理
噴(pen)(pen)淋水(shui)由(you)水(shui)泵將集水(shui)槽中(zhong)(zhong)的(de)(de)水(shui)輸(shu)送(song)到蒸發式(shi)冷凝(ning)(ning)器頂部的(de)(de)噴(pen)(pen)淋管(guan),經(jing)噴(pen)(pen)嘴噴(pen)(pen)淋到冷凝(ning)(ning)排管(guan)的(de)(de)外表面(mian)形成很薄(bo)的(de)(de)水(shui)膜,水(shui)膜中(zhong)(zhong)部分水(shui)吸熱后蒸發為水(shui)蒸氣,其余落入集水(shui)槽,供水(shui)泵循環使用。
軸流風(feng)機強(qiang)迫空(kong)氣(qi)從頂部和(he)側壁下部被(bei)吸(xi)入流經盤(pan)管,填料、飽和(he)熱(re)濕空(kong)氣(qi)則被(bei)排到(dao)周圍大氣(qi)中(zhong)(zhong),熱(re)濕空(kong)氣(qi)中(zhong)(zhong)夾帶的(de)部分(fen)水(shui)滴通過收水(shui)器截留,有(you)效地(di)控(kong)制水(shui)滴飄散損失,散失致大氣(qi)中(zhong)(zhong)的(de)水(shui)蒸(zheng)氣(qi)在(zai)系統中(zhong)(zhong)由浮球(qiu)閥控(kong)制補充冷(leng)卻(que)水(shui)。