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全空氣系統中,冬季室(shi)外(wai)(wai)溫度(du)過低的時間,利用冷(leng)(leng)卻(que)塔給(gei)內(nei)(nei)區(qu)(qu)(qu)(qu)直接供(gong)冷(leng)(leng)的空調方式不易實現。此時,可(ke)以將(jiang)室(shi)外(wai)(wai)冷(leng)(leng)空氣作(zuo)為(wei)冷(leng)(leng)源,用乙二醇(chun)溶液(ye)作(zuo)載冷(leng)(leng)劑,將(jiang)室(shi)外(wai)(wai)的自然(ran)冷(leng)(leng)源引入(ru)室(shi)內(nei)(nei)給(gei)內(nei)(nei)區(qu)(qu)(qu)(qu)供(gong)冷(leng)(leng)。需要(yao)給(gei)外(wai)(wai)區(qu)(qu)(qu)(qu)供(gong)熱(re)而給(gei)內(nei)(nei)區(qu)(qu)(qu)(qu)供(gong)冷(leng)(leng)時,關閉冷(leng)(leng)水裝置,仍然(ran)用鍋爐(lu)或城市熱(re)水作(zuo)為(wei)熱(re)源給(gei)外(wai)(wai)區(qu)(qu)(qu)(qu)供(gong)熱(re)。
在室外(wai)安裝板(ban)(ban)式(shi)換(huan)熱(re)(re)(re)(re)器,由(you)風(feng)(feng)機(ji)將室外(wai)的(de)冷(leng)空(kong)氣引(yin)入(ru)板(ban)(ban)式(shi)換(huan)熱(re)(re)(re)(re)器,乙(yi)二(er)(er)(er)醇(chun)溶液(ye)和(he)室外(wai)冷(leng)空(kong)氣在板(ban)(ban)式(shi)換(huan)熱(re)(re)(re)(re)器中(zhong)進(jin)(jin)行(xing)熱(re)(re)(re)(re)交(jiao)換(huan)。被(bei)冷(leng)卻的(de)乙(yi)二(er)(er)(er)醇(chun)溶液(ye)進(jin)(jin)入(ru)內區(qu)(qu)的(de)空(kong)調裝置(zhi),在裝置(zhi)中(zhong)與(yu)混合空(kong)氣(新、回風(feng)(feng)進(jin)(jin)行(xing)混合后(hou)的(de)空(kong)氣)進(jin)(jin)行(xing)熱(re)(re)(re)(re)交(jiao)換(huan),混合空(kong)氣被(bei)冷(leng)卻,溫(wen)度(du)降低后(hou)進(jin)(jin)入(ru)內區(qu)(qu)房(fang)間(jian),給內區(qu)(qu)房(fang)間(jian)供冷(leng)。乙(yi)二(er)(er)(er)醇(chun)溶液(ye)溫(wen)度(du)升(sheng)高(gao),再次(ci)回到室外(wai)的(de)板(ban)(ban)式(shi)換(huan)熱(re)(re)(re)(re)器中(zhong),與(yu)室外(wai)的(de)冷(leng)空(kong)氣進(jin)(jin)行(xing)熱(re)(re)(re)(re)交(jiao)換(huan),溫(wen)度(du)降低后(hou)繼續循環。這種熱(re)(re)(re)(re)交(jiao)換(huan)方(fang)式(shi)經常用在熱(re)(re)(re)(re)回收(shou)系統中(zhong)。乙(yi)二(er)(er)(er)醇(chun)和(he)高(gao)溫(wen)排風(feng)(feng)進(jin)(jin)行(xing)熱(re)(re)(re)(re)交(jiao)換(huan),溫(wen)度(du)升(sheng)高(gao)后(hou),進(jin)(jin)入(ru)新風(feng)(feng)機(ji)柜,給新風(feng)(feng)進(jin)(jin)行(xing)預熱(re)(re)(re)(re)。從(cong)而,回收(shou)排風(feng)(feng)中(zhong)的(de)熱(re)(re)(re)(re)量給新風(feng)(feng)加熱(re)(re)(re)(re),節約電能,節省運行(xing)費。 這(zhe)種將乙(yi)(yi)(yi)二(er)(er)醇溶液(ye)作為載冷(leng)劑,引入室(shi)外(wai)冷(leng)空(kong)(kong)氣(qi)中的冷(leng)量給(gei)內(nei)區(qu)供冷(leng)的方式(shi)是一(yi)種很節能(neng)(neng)的空(kong)(kong)調(diao)方式(shi)。只需(xu)在室(shi)外(wai)裝設一(yi)臺板式(shi)換(huan)熱器,運行(xing)(xing)時(shi),冷(leng)水(shui)裝置(zhi)關閉,只開啟風機(ji)和空(kong)(kong)調(diao)裝置(zhi)就能(neng)(neng)夠引入天然冷(leng)源給(gei)內(nei)區(qu)供冷(leng),節約(yue)了電能(neng)(neng),減少了運行(xing)(xing)費用。但是,在利用室(shi)外(wai)冷(leng)量給(gei)內(nei)區(qu)供冷(leng)的過(guo)程中,冷(leng)空(kong)(kong)氣(qi)要與(yu)乙(yi)(yi)(yi)二(er)(er)醇進(jin)行(xing)(xing)熱交換(huan),乙(yi)(yi)(yi)二(er)(er)醇再(zai)與(yu)混合空(kong)(kong)氣(qi)進(jin)行(xing)(xing)熱交換(huan),經過(guo)兩(liang)次(ci)熱交換(huan)后(hou),冷(leng)量損失(shi)較大(da)(da),換(huan)熱效率(lv)不(bu)高(gao),一(yi)般低(di)于60%。乙(yi)(yi)(yi)二(er)(er)醇濃度一(yi)般在25-40%。乙(yi)(yi)(yi)二(er)(er)醇水(shui)溶液(ye)密(mi)度比(bi)(bi)水(shui)大(da)(da),粘度也大(da)(da)于水(shui),而比(bi)(bi)熱小于水(shui),選用水(shui)泵(beng)時(shi),加大(da)(da)了水(shui)泵(beng)電機(ji)容量。 DSLC乙(yi)二(er)醇熱回收定壓(ya)(ya)(ya)補水(shui)裝置的控制(zhi)系(xi)統一般有三種運行(xing)方式:1、循(xun)環系(xi)統和補水(shui)系(xi)統壓(ya)(ya)(ya)差和壓(ya)(ya)(ya)力(li)自(zi)動控制(zhi)水(shui)泵起停;2、恒壓(ya)(ya)(ya)變頻控制(zhi)水(shui)泵循(xun)環和補水(shui)流(liu)量;3、PID溫度壓(ya)(ya)(ya)力(li)控制(zhi)調節閥控制(zhi)給水(shui)循(xun)環和補水(shui)流(liu)量。 DSLC定壓(ya)補水裝置(zhi)膨脹罐(guan)布置(zhi)有單罐(guan)單泵,單罐(guan)雙泵,雙罐(guan)雙泵式等(deng)多種(zhong)布置(zhi)方(fang)式,機電一體化(hua),氣(qi)水無污染,氮氣(qi)一次充氣(qi)反復(fu)多次使用(yong),結構(gou)緊(jin)湊,維護使用(yong)方(fang)便。
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