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產(chǎn)品詳情<\/span><\/p> 風(fēng)機(jī)水泵專用智能節(jié)電設(shè)備<\/span><\/p> 在風(fēng)機(jī)、水泵類負(fù)載運(yùn)行中,其輸入的能量約15<\/span>~<\/span>20%<\/span>被電機(jī)和風(fēng)機(jī)、水泵本身所消耗,約<\/span>35<\/span>~<\/span>50%<\/span>被擋板或風(fēng)門節(jié)流所消耗。前者可通過(guò)采用高效電機(jī)及高效風(fēng)機(jī)、水泵來(lái)降低,后者則可通過(guò)采用節(jié)能調(diào)速調(diào)節(jié)流量來(lái)取消。因?yàn)閷?duì)水泵來(lái)說(shuō),其軸功率與轉(zhuǎn)速的三次方成正比,流量與轉(zhuǎn)速的一次方成正比。所以,如果通過(guò)調(diào)速將流量降到滿載時(shí)的<\/span>80%<\/span>,則所需軸功率可減少一半(理論上)。實(shí)踐及理論均已證明,采用節(jié)能調(diào)速調(diào)節(jié)流量節(jié)電可達(dá)<\/span>20%<\/span>~<\/span>60%<\/span>。<\/span><\/span> 基本原理<\/span><\/p> 風(fēng)機(jī)、水泵類是一種平方轉(zhuǎn)矩負(fù)載,其轉(zhuǎn)速n<\/span>與流量<\/span>Q<\/span>、壓力<\/span>H<\/span>及軸功率<\/span>N<\/span>的關(guān)系如下式所示:<\/span><\/span> 表1 <\/span>節(jié)能調(diào)速的節(jié)電比率如下表<\/span><\/span><\/p> <\/span><\/p> 圖1<\/span>轉(zhuǎn)速<\/span>n<\/span>、壓力<\/span>P<\/span>、功率<\/span>N<\/span>、節(jié)電率<\/span>K<\/span>與流量<\/span>Q<\/span>關(guān)系曲線<\/span><\/span><\/p> <\/span><\/p> 應(yīng)用效果<\/span><\/p> 節(jié)能在實(shí)際使用中要考慮流量與水泵的轉(zhuǎn)速的平方成正比的關(guān)系及管損與水泵的轉(zhuǎn)速平方成正比的關(guān)系;在水泵的壓力隨轉(zhuǎn)速的降低而降低的同時(shí)管道損失也在降低,因此,系統(tǒng)對(duì)水泵壓力的實(shí)際需求一樣要降低;而通過(guò)設(shè)定智能省電裝置下限頻率的方法又可保證系統(tǒng)對(duì)水泵壓力的最低需求。<\/span> 系統(tǒng)運(yùn)行穩(wěn)定,抗干擾能力強(qiáng),軟啟動(dòng),高效節(jié)能,保護(hù)功能完善,可邏輯控制,操作簡(jiǎn)單安裝方便,可實(shí)現(xiàn)工頻、節(jié)能雙回路控制,可自動(dòng)切換,安全運(yùn)行有保證,低噪音,環(huán)保效果顯著等。<\/span> 經(jīng)濟(jì)效益分析<\/span><\/p> 根據(jù)分析和計(jì)算,對(duì)風(fēng)機(jī)、水泵類系統(tǒng)進(jìn)行節(jié)能改造,采用我公司<\/span>’<\/span>LK-DL-K-P/SB<\/span>’<\/span>風(fēng)機(jī)、水泵專用智能節(jié)電設(shè)備與原有控制的電機(jī)比較,能源節(jié)約是最有實(shí)際意義的,我公司<\/span>’<\/span>LK-DL-K-P/SB<\/span>’風(fēng)機(jī)<\/span><\/span>、水泵專用智能節(jié)電設(shè)備是根據(jù)用量需求來(lái)控制電機(jī)的運(yùn)行,這樣就可節(jié)省大量25%-45%<\/span>左右的電能,而且還能進(jìn)一步降低設(shè)備的運(yùn)行成本降低,傳統(tǒng)電機(jī)的運(yùn)行成本由三項(xiàng)組成:初始采購(gòu)成本、維護(hù)成本和能源成本。其中能源成本大約占電機(jī)運(yùn)行成本的<\/span>77%<\/span>。通過(guò)降低能源成本,再加上對(duì)設(shè)備的沖擊減少,維護(hù)和維修量也跟隨降低,所以運(yùn)行成本將大大降低。不僅如此,安裝我公<\/span><\/span>司’<\/span><\/span>LK-DL-K-P/SB<\/span>’智<\/span><\/span>能風(fēng)機(jī)、水泵專用智能節(jié)電設(shè)備還能進(jìn)一步提高控制精度,使系統(tǒng)具有精確的控制能力。<\/span>
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<\/span> 一臺(tái)設(shè)備在選用與其配套的電機(jī)容量時(shí),均是按設(shè)備的最大用量予以考慮,且留有<\/span>20%<\/span>流量的裕量。這就是說(shuō),即使設(shè)備全載運(yùn)行,其開(kāi)度也不會(huì)是<\/span>100%<\/span>,最多僅能達(dá)到<\/span>80%<\/span>左右,此外,水泵在選用其配套電動(dòng)機(jī)時(shí),也留有一定裕量。因而在設(shè)備的正常運(yùn)行中,其電動(dòng)機(jī)總是處于不全載情況下運(yùn)行。上面兩種情況,使得采用節(jié)能調(diào)速調(diào)節(jié)流量要節(jié)約更多的電能。<\/span><\/span>
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<\/span> 用擋板調(diào)節(jié)流量,可調(diào)性能差,非線度大,反應(yīng)速度慢,不準(zhǔn)確。而且在擋板開(kāi)度很小時(shí),電機(jī)的輸入功率仍然很大。采用節(jié)能調(diào)速調(diào)節(jié)流量(此時(shí)擋板處于全開(kāi)位置),不僅可調(diào)性能好,反應(yīng)速度快,而且線性度和準(zhǔn)確性均很高。如采用閉環(huán)控制,則水位控制精度可達(dá)<\/span>±10<\/span>毫米,<\/span><\/span>汽<\/span>壓控制精度可達(dá)±5%<\/span>,負(fù)壓控制精度可達(dá)<\/span>±3Pa<\/span>。<\/span><\/span>
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<\/span> 與計(jì)算機(jī)接口,接受計(jì)算機(jī)的指令來(lái)改變智能省電裝置的輸出頻率。這種控制方式可使設(shè)備始終在最佳狀態(tài)下運(yùn)行。這不僅可將提高設(shè)備效率<\/span>15%<\/span>,同時(shí)也具有約<\/span>25%<\/span>的節(jié)能作用。并能減輕勞動(dòng)強(qiáng)度,降低噪音、粉塵,從而減少了對(duì)環(huán)境的污染。<\/span><\/span><\/p>
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<\/span> Q1=Q2(<\/span>n1/n2<\/span>);<\/span>H1=H2<\/span>(<\/span>n1/n2<\/span>)<\/span>2<\/span>;<\/span>N1=N2<\/span>(<\/span>n1/n2<\/span>)<\/span>3<\/span>亦為:<\/span>Q<\/span><\/span>∝<\/span>n;<\/span>H<\/span><\/span>∝<\/span>n2;<\/span>N<\/span><\/span>∝<\/span>n3<\/span>
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<\/span> 上式表明,風(fēng)機(jī)、水泵的用量<\/span>Q<\/span>與其轉(zhuǎn)速<\/span>n<\/span>成正比,水泵的揚(yáng)程<\/span>H<\/span>與其轉(zhuǎn)速<\/span>n<\/span>的平方成正比,風(fēng)機(jī)、水泵的軸功率<\/span>N<\/span>與其轉(zhuǎn)速<\/span>n<\/span>的立方成正比。頻率與轉(zhuǎn)速的關(guān)系為<\/span>n=60f(1-s)/p<\/span><\/span>
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<\/span> 式中:<\/span>f<\/span>為電源頻率,<\/span>s<\/span>為轉(zhuǎn)差率,額定轉(zhuǎn)差率約為<\/span>2<\/span>~<\/span>5%<\/span>,<\/span>p<\/span>為電動(dòng)機(jī)的極對(duì)數(shù)。<\/span><\/span>
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<\/span> 由上式可看出,當(dāng)<\/span>p<\/span>、<\/span>s<\/span>一定時(shí),電機(jī)即水泵轉(zhuǎn)速與輸入電流的頻率成正比。頻率愈高,轉(zhuǎn)速愈快,頻率愈低,轉(zhuǎn)速愈慢。由水泵特性可知,水泵用量與頻率也成正比,調(diào)節(jié)頻率即調(diào)節(jié)轉(zhuǎn)速。<\/span><\/span>
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<\/span> 由此可見(jiàn),如果降低電源頻率即可降低電機(jī)轉(zhuǎn)速,減少水泵用量,從而按立方指數(shù)關(guān)系大幅度降低水泵用量電機(jī)功率消耗,實(shí)現(xiàn)有效節(jié)能。見(jiàn)表<\/span>1<\/span>與圖<\/span>1<\/span>。<\/span><\/span><\/p>
<\/span> 2.<\/span><\/span> <\/span>控制性能的提高<\/span><\/p>
<\/span> <\/span>3.<\/span><\/span> <\/span>避免了可調(diào)節(jié)擋板的維護(hù)費(fèi)用的發(fā)生。<\/span>
<\/span> <\/span>4.<\/span><\/span> <\/span>節(jié)電效果顯著,<\/span>根據(jù)現(xiàn)場(chǎng)實(shí)際數(shù)據(jù)和運(yùn)行工況分析,節(jié)能控制改造項(xiàng)目風(fēng)機(jī)、水泵類節(jié)能改造后,節(jié)電率可達(dá)到25%--45%<\/span>之間。<\/span><\/span><\/p>
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<\/span> 使電機(jī)的輸出與系統(tǒng)所需的用量相匹配。電機(jī)的輸出用量隨著電機(jī)轉(zhuǎn)速的改變而改變。由于控制電機(jī)速度的精度提高,所以它可以使系統(tǒng)變化保持在<\/span>±0.2bar<\/span>范圍內(nèi),有效地提高了工控的質(zhì)量。另外,安裝我公<\/span><\/span>司’<\/span><\/span>LK-DL-K-P/SB<\/span>’風(fēng)<\/span><\/span>機(jī)、水泵專用智能節(jié)電設(shè)備還能延長(zhǎng)電機(jī)的使用壽命,從0Hz<\/span>起動(dòng)電機(jī),它的起動(dòng)加速時(shí)間可以調(diào)整,<\/span><\/span>’<\/span>LK-DL-K-P/SB<\/span>’風(fēng)<\/span><\/span>機(jī)、水泵專用智能節(jié)電設(shè)備的保護(hù)功能比較齊全,電機(jī)為軟啟動(dòng),啟動(dòng)電流比較小,對(duì)電機(jī)能起到較好的保護(hù)作用,<\/span>從而減少起動(dòng)時(shí)對(duì)壓縮機(jī)的電器部件和機(jī)械部件所造成的沖擊,增強(qiáng)系統(tǒng)的可靠性,減少了電機(jī)加卸載的次數(shù),使電機(jī)的使用壽命延長(zhǎng)。<\/span><\/span>
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<\/span> 此外,能夠減少機(jī)組起動(dòng)時(shí)電流波動(dòng),這一波動(dòng)電流會(huì)影響電網(wǎng)和其它設(shè)備的用電,能夠有效的將起動(dòng)電流的峰值減少到最低程度。還有安裝我公司<\/span><\/span>’<\/span>LK-DL-K-P/SB<\/span>’<\/span>