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中央空调:循环水泵扬程的选择

水泵选型 卧泉泵业 883浏览 0评论

1 WENTIDETICHU

在中央空调系统中,循环泵夏季输送冷冻水,冬季输送热水至空调末端装置.工程设计应按照空调系统水流量和系统阻力选择性能良好的水泵.有关暖通空调设计手册都有详细设计计算方法.问题在于实际工程设计时,某些工程师未按照计算方法进行设计计算,而是凭经验想当然,对系统以及某些空调设备、配件等新产品缺乏认真研究,结果导致所选择的水泵不能满足要求,或者造成运行费用增加,甚至水泵不能正常工作,这不得不引起空调设计者的高度重视.

2 LILUNFENXI

KONGDIAOXITONGSHUILIULIANGDEDAXIAOYOUFUHEJIGONGHUISHUIWENCHAQUEDING,XITONGZULITONGGUOSHUILIJISUANQIUDE.ANLIULIANGHEZULIXUANZEDESHUIBENG,YUNXINGSHIYINGCHUYUGAOXIAOQU,QIGONGZUODIANWEISHUIBENGXINGNENGQUXIANHEGUANLUTEXINGQUXIANDEJIAODIAN,RUTU1ZHONGADIAN[1].ERGONGCHENGZHONGXUANZEDESHUIBENGCHANGCHANGCHUXIANLIANGZHONGBUZHENGCHANGQINGKUANG.

SHUIBENGGONGZUODIANSHIYITU1)SHEJISHIBIJIAOBAOSHOU,SHUIXITONGSHIJILIUSUQUZHIJIAODI,GUSUANXITONGZULIJIAODA,DAOZHIXUANSHUIBENGSHIYANGCHENGJIADA,SHISUOXUANZEDEXUNHUANSHUIBENGYANGCHENGBISHEJILIULIANGXIADEXITONGZULIDADEDUO.RUTU2:

皇冠即时比分BUTONGSHUIBENGDEGONGZUODIANBIANHUATU  LIULIANGQASHIXITONGSHEJILIULIANG,ZAICILIULIANGXIASHUIBENGYANGCHENGWEIHBJIKE。SHIJIXUANZEDESHUIBENGYANGCHENGWEIHS。WEILEBAOZHENGQA,ZEYAOGAIBIANGUANLUTEXING,JITONGGUOGUANXIAOSHUIBENGJINCHUKOUDEFAMEN,SHIGUANLUTEXINGQUXIANYOUⅠBIANWEIⅡ.XIANRAN,ΔP=HB-HAWANQUANTONGGUOFAMENJIELIU,ZHEISHIFEICHANGBUJINGJIDE,YESHIGONGCHENGZHONGXUBIMIANCHUXIANDEQINGKUANG,RUGUODONGJIYUNXINGCAIYONGTONGYITAOBENGGONGZUO,YOUYULIULIANGBIANXIAO,JIELIUGENGYANZHONG,JIUGENGBUJINGJI,SHENZHIZAOCHENGSHUIBENGGONGZUODIANBUWENDING[2].

2) SHEJIGUOYUZIXIN,DUIKONGDIAOXITONGZULIGUSUANPIANXIAO,SUOXUANBENGYANGCHENGXIAOYUSHEJILIULIANGXIAXITONGZULI.

SHEJIGONGZUODIANWEIA,SHUIBENGLIULIANGWEIQA,YANGCHENGWEIHA.SHUIBENGSHIJIYUNXINGSHIGUANLUTEXINGQUXIANBUSHIⅠ,ERSHIⅡ,YUNXINGGONGZUODIANWEIB,LIULIANGQBA,QIEBDIANBUZAISHUIBENGGAOXIAOQU.XIANRANZHEIBIDIYIZHONGQINGKUANGGENGWEIBULI.JIEJUEDEWEIYIBANFAZHINENGGENGHUANSHUIBENG.

3 GONGCHENGSHILI

皇冠即时比分LI1 JIAGONGCHENGWEIYIDANTIGAOCENGJIANZHU,JIANZHUGAODU29m,BENGFANGSHEZAIZHULOUDIXIASHI. SHEJIXUANYONGJINKOUKAILILIXINSHILENGDONGJIYITAI,ZHILENGLIANGWEI1163kW,PEIYONG2TAIXUNHUANSHUIBENG,1YONG1BEI,SHUIBENGCANSHUJIANBIAO1.

刚开始调试运动时,发现水泵电机电流过大,水泵出水管振动厉害,且有异常声音.水泵扬程仅为0.28MPa,电机电流I=115A.分析原因,为分集水器压差仅为0.13MPa,所选水泵扬程偏大.此时水泵工作点为低扬程大流量,电机严重超载[3];水泵气蚀严重,管路抖动厉害,声音异常;关小水泵和冷冻机蒸发器进、出口阀门,保证蒸发器进出口要求的压差Δp=(92±5)kPa,使水泵恢复正常工作.此时测试数据如表2(原泵)。

皇冠即时比分SHUIBENGYANGCHENGWEI0.48MPa,FENJISHUIQIYACHAWEI0.10MPa,ZHENGFAQIYACHAWEI0.1MPa,XITONGZULIBINGBUDA,ERSHUIBENGDABUFENYATOUWANQUANXIAOHAOZAIGUANXIAODEFAMENSHANG.

JIEJUEBANFA:GENGHUANYITAIDIYANGCHENGSHUIBENG,CESHISHUJURUBIAO2(XINBENG).DUIBIBIAO2SHUJU,DIANJIDIANLIUYOU82AJIANGWEI40A,QIYUNXINGJINGJIXINGBUYANERYU.

LI2 YIGONGCHENGWEIYIQUYUKONGDIAO,ZHILENGJIAREZHANJIZHONGXIANGDUOCHUANGJIANZHUWUGONGLENG、GONGRE.SHEJI2907kWLENGDONGJI2TAI,XUNHUANSHUIBENG3TAI,2YONG1BEI.XITONGDIAOSHISHIKAIYITAILENGDONGJI,YITAIXUNHUANSHUIBENG.JIFENZHONGHOU,SHUIBENGCHUSHUIGUANZHENDONGLIHAIQIEBANYOUYICHANGSHENGYIN,LENGDONGJIBUNENGQIDONG,GUZHANGXIANSHILENGDONGSHUIXUNHUANSHUILIANGBUGOU.JIANCHAXITONGFAMENYIQUANBUDAKAI,SHUIGUOLVQIQUANBUQINGXIGANJING,XITONGPAIQIJIAOCHEDI.MINGPAICANSHU:QWEI500m3.h-1,HWEI0.475MPa,NWEI90kW;CESHISHUJU:ZHENGFAQIJINCHUKOUYACHA0.02MPa, SHUIBENGJINCHUKOUYACHA0.14MPa,JISHUIQIYALI0.27MPa,FENSHUIQIYALI0.40MPa.JUGAISHUIBENGXINGNENGQUXIAN,DANGYANGCHENGH=0.14MPaSHI,ZAIXITONGFAMENQUANKAIQINGKUANGXIA,LIULIANGQYINGDAYU500m3.h-1CAIDUI,ERCISHISHUILIUZHISHIQIZISUO,XIANSHILIULIANGBUZU.YOUCIKEJIAN,SHUIBENGGONGZUOYICHANG.SHISHISHANG,RUCIDADEXITONG,SHUIBENGYANGCHENGH=0.14MPaYESHIBUKENENGDE.ZUIZHONGCHAMINGYUANYINYOUER:① SHUIBENGRUKOUANZHUANGLEJINKOUSHUASHISHUIGUOLVQI,GUOLVQIWANGKONGTAIXIAO,DAOZHISHUIBENGRUKOUZULITAIDA,CHANSHENGYANZHONGQISHI,SHUIBENGXINGNENGBIANHUAI; ②BENGDELIULIANGHEYANGCHENGDOUFEICHANGXIAO,XITONGZULIJIAODA.JIANGSHUASHIGUOLVQILVWANGCHAIXIAYUNXING,FEN、JISHUIQIYACHADA0.45MPa,SHUIBENGYANGCHENGWEI0.52MPa.RULIANGTAIBENGTONGSHIYUNXING,XUNHUANLIULIANGZENGDA,XITONGZULIHAIYAOZENGDA.XIANRANSHUIBENGBUNENGBAOZHENGXITONGZHENGCHANGYUNXING.

JIEJUEFANGFA:GENGHUANSHUIGUOLVQILVWANG;DUIXITONGZHONGXINJINXINGSHUILIJISUAN,GENGHUANSHUIBENG.ZHEIJIZAOCHENGLEJIAODADEJINGJISUNSHI,YOUYINGXIANGLEKONGDIAOXITONGZHENGCHANGYUNXING,JIAOXUNSHISHENKEDE.

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