防爆螺桿式冷水(shui)機(ji)(ji)組安全系數(shu)高，運(yun)行(xing)穩(wen)定(ding)，運(yun)行(xing)功率(lv)非常穩(wen)定(ding)。即使冷水(shui)機(ji)(ji)長時間運(yun)行(xing)，設備仍能(neng)保持穩(wen)定(ding)的(de)運(yun)行(xing)功率(lv)。只有(you)保證設備的(de)運(yun)行(xing)功率(lv)趨于穩(wen)定(ding)，才能(neng)避免冷水(shui)機(ji)(ji)出現各(ge)種故(gu)障，影響(xiang)設備的(de)正(zheng)常運(yun)行(xing)。

防(fang)爆螺桿式冷(leng)(leng)(leng)(leng)水(shui)(shui)機(ji)(ji)組在選(xuan)用(yong)冷(leng)(leng)(leng)(leng)水(shui)(shui)機(ji)(ji)組時(shi)(shi)，應注(zhu)意(yi)標稱(cheng)工(gong)況(kuang)條件(jian)。冷(leng)(leng)(leng)(leng)水(shui)(shui)機(ji)(ji)的實際制冷(leng)(leng)(leng)(leng)量與以(yi)下因素(su)有關。冷(leng)(leng)(leng)(leng)水(shui)(shui)出口溫(wen)度和流(liu)量、冷(leng)(leng)(leng)(leng)卻水(shui)(shui)入口溫(wen)度、流(liu)量和結垢系數。選(xuan)擇冷(leng)(leng)(leng)(leng)水(shui)(shui)機(ji)(ji)時(shi)(shi)，要(yao)注(zhu)意(yi)這類(lei)冷(leng)(leng)(leng)(leng)水(shui)(shui)機(ji)(ji)的正常工(gong)作范圍，主要(yao)是因為主電(dian)機(ji)(ji)的限(xian)流(liu)是在標稱(cheng)工(gong)況(kuang)下軸功率的電(dian)流(liu)值。設計選(xuan)型時(shi)(shi)應注(zhu)意(yi)在標稱(cheng)工(gong)況(kuang)流(liu)量下，冷(leng)(leng)(leng)(leng)水(shui)(shui)出口溫(wen)度不超過(guo)15℃，空冷(leng)(leng)(leng)(leng)機(ji)(ji)組室外(wai)干球溫(wen)度不超過(guo)43℃。如(ru)需超出上述(shu)范圍，需了解壓縮機(ji)(ji)的使用(yong)范圍是否允許，配備的主電(dian)機(ji)(ji)功率是否充足。

防(fang)爆螺(luo)桿式冷(leng)(leng)(leng)水機的(de)(de)主要控制(zhi)(zhi)參數(shu)有(you)制(zhi)(zhi)冷(leng)(leng)(leng)性(xing)能系(xi)數(shu)、額定制(zhi)(zhi)冷(leng)(leng)(leng)量、輸入(ru)功率、制(zhi)(zhi)冷(leng)(leng)(leng)劑種類(lei)等。冷(leng)(leng)(leng)水機的(de)(de)選(xuan)(xuan)擇要根(gen)據(ju)制(zhi)(zhi)冷(leng)(leng)(leng)負荷和用途來考(kao)慮(lv)。對于低負荷下運行時(shi)間較長的(de)(de)制(zhi)(zhi)冷(leng)(leng)(leng)系(xi)統(tong)，**選(xuan)(xuan)用多(duo)頭(tou)活塞式壓縮機組(zu)(zu)或螺(luo)桿式壓縮機組(zu)(zu)，便于調(diao)節和節能。在選(xuan)(xuan)擇冷(leng)(leng)(leng)水機組(zu)(zu)時(shi)，優(you)先選(xuan)(xuan)用性(xing)能系(xi)數(shu)值較高的(de)(de)冷(leng)(leng)(leng)水機組(zu)(zu)。據(ju)資料統(tong)計(ji)，因此，在選(xuan)(xuan)擇冷(leng)(leng)(leng)水機組(zu)(zu)時(shi)，應(ying)優(you)先考(kao)慮(lv)效(xiao)率曲線平(ping)坦的(de)(de)機型(xing)(xing)。同(tong)時(shi)在設計(ji)和選(xuan)(xuan)型(xing)(xing)時(shi)要考(kao)慮(lv)冷(leng)(leng)(leng)水機組(zu)(zu)負荷的(de)(de)調(diao)節范圍。多(duo)頭(tou)螺(luo)桿式冷(leng)(leng)(leng)水機組(zu)(zu)具有(you)優(you)良的(de)(de)部分負荷性(xing)能，可根(gen)據(ju)實際情況選(xuan)(xuan)用。