4.2.3.2運行方式
正常狀態，轉換開關QKqiezhizidongyunxinghuilu，youwenduchuanganqicedinglengquetachushuiwendu，zhuanhuanchengbiaozhundedianliuxinhao，songzhibianpinqidewendujianceqi，yongyukongzhilengquetafengjizhuansu，gaibianfengjidefengliang，congergaibianlengquetachushuiwendu；當1台風機運轉頻率接近工頻運行仍不能滿足要求時，將此變頻運行風機改為工頻運行，再變頻啟動另1台風機，直到滿足各生產裝置所需的循環水溫度≤32℃為止。整個控製係統為一個閉環調節係統。
根(gen)據(ju)工(gong)藝(yi)要(yao)求(qiu)，自(zi)動(dong)確(que)定(ding)電(dian)機(ji)是(shi)變(bian)頻(pin)運(yun)行(xing)或(huo)是(shi)工(gong)頻(pin)運(yun)行(xing)，並(bing)做(zuo)到(dao)最(zui)先(xian)運(yun)行(xing)的(de)風(feng)機(ji)最(zui)先(xian)切(qie)除(chu)，各(ge)電(dian)機(ji)循(xun)環(huan)運(yun)行(xing)，從(cong)而(er)延(yan)長(chang)設(she)備(bei)使(shi)用(yong)壽(shou)命(ming)。當(dang)變(bian)頻(pin)器(qi)出(chu)故(gu)障(zhang)時(shi)，將(jiang)轉(zhuan)換(huan)開(kai)關(guan)QK切換至手動狀態，3台電機運行在工頻狀態仍可滿足運行要求。
采用變頻器調速的方法，改變了以往電機的開、停僅為手動控製的單一工頻運行方式，從而避免為滿足冷卻塔出水水溫≤32℃，必須使1台tai或huo幾ji台tai風feng機ji均jun處chu在zai工gong頻pin狀zhuang態tai下xia運yun行xing，而er造zao成cheng水shui溫wen過guo低di，形xing成cheng不bu必bi要yao的de能neng源yuan浪lang費fei。采cai用yong變bian頻pin調tiao速su運yun行xing方fang式shi，提ti高gao了le水shui溫wen控kong製zhi的de準zhun確que性xing，並bing可ke實shi現xian平ping滑hua啟qi動dong電dian機ji，使shi3台電機循環運行，從而提高電機的使用壽命。
4.2.4風機節能經濟分析
(1)由表1所示的冷卻塔運行參數可知：1＃塔的處理能力隻是2#或3#塔的66%，但其處理1m3/h熱水風機電功率單耗確是2#塔與3#塔風機電功率單耗之平均值的1.783倍(即其大0.0313kW/m3/h)，其原因是該塔填料仍為舊式低效填料，若將1#塔填料改用與2#塔相同性能的新型高效填料，則每小時處理能力就可提高1000m3。如按1#塔處理量為2000m3/h計算，每小時節電2000×0.0313＝62.6kW，節能效果相當可觀。1#塔每年運行時間為3000h，更換填料需投資約45萬元。
收益率＝3000×62.6×0.56/45×104×100%＝23.37％。
(2)采用變頻調速方案，根據表3可得每年總收益值為8.883萬元，實施變頻控製需要投資約15萬元，收益率=8.883/15×100%＝59.2％，約1.7年就能收回投資額，另外設備的折舊率大大降低，可見節能效果顯著。
5.總述
zhinenglouyuhezhinengchangfangdegaosufazhan，shidexianzailouyuhechangfangdenenghaoyuelaiyueda，jienengfangfadeshiyongshimeiyigeguanlizhehejingyingzhedoubixukaolvdewenti。erjienengshimuqianquanqiuguanzhudeguannianzhuti，erjiumuqianlaijiangbianpinqijienengshizuijiadetouruzuishaodejienengfangshihekongzhifangshi。name，zuoweilengquetadeyonghuruguozailejiedaobianpinqijienengdehaochuzhihou。duiyuzhemeshaoliangdetouziziranshishifendeleyi。
duiyulengquetadeshengchanchangjialaishuo，yizhongxindechanpindetourushengchanshouxiankanshichangdexuqiuhenenggouchanshengdexiaoyi，tongguoyishangdejingjifenxi，womenkeyidechushiyongfangzhiyaozailejiedaolebianpinqiyingyongdeyoudianhou，jiyuyunxingchengbenheshebeiweihudekaolv，biranhuiduizheyangdetouzichanshengnonghoudexingqu。ershishishangmuqianshichangshangduiyulengquetabianpinqiyingyongyijingshifendechengshu，erqieyezhengshichaozhezhegefangxiangkuaisudefazhan。bianpinqideyingyongshimuqianzhenggelengquetashichangnaizhizhenggezhongyangkongtiaoshichangdequshi，zhaomuqiandeshichangqingkuanglaikan，yuezaotourubianpinqideyingyongdechangshangshoudaodejingjixiaoyibiranshiyuekuai。dangranzhexuyaolengquetachangshangdexiaoshourenyuanduikehujinxingxiangjindedaoweidebianpinqijishudejieshi。erlengquetashengchanshangzaizhangwolebianpinqijishuhou，kongzhibufendeyingjianshouruhejishufuwushouru，doujiangkechengweiyigexindelirunzengchangdian。congchangyuanlaikan，lengquetabianpinqideyingyongyoushihuiyuelaiyuemingxian，bianpinqideshiyongyehuiyuelaiyuepubian，changshangzaishiyonglelengquetabianpinjishuhoubujinkeyidedaoshouyierqieyekeshizijidelengquetazaijiliedeshichangjingzhengzhongchangqichuyuzhudongweizhi。
雖然在前期的投入中會有人員配備等投資，但是從長遠的立場來看，這項投資對冷卻塔的廠商來說必將收到豐厚的利潤回報。
