風(fēng)機(jī)是一種具有比較簡(jiǎn)單結(jié)構(gòu)的機(jī)械,但是對(duì)于我們來(lái)說(shuō)有很多的用處。風(fēng)機(jī)有很多的部件,其中有一種是風(fēng)機(jī)百葉窗。或許大家會(huì)覺(jué)得這是不太重要的部件,但實(shí)際上它是很重要的。下面深圳風(fēng)機(jī)廠家就為大家進(jìn)行介紹。
6月份,Hog Slat美國(guó)總部通風(fēng)主管Austin Baker分享了隧道通風(fēng)系統(tǒng)故障排除指南,通俗而易懂,簡(jiǎn)單易操作。今天, Austin Baker,繼續(xù)為大家分享通風(fēng)系統(tǒng)中,不同類(lèi)型的百葉窗對(duì)風(fēng)機(jī)的性能產(chǎn)生哪些不同的影響。豬場(chǎng)建設(shè),選擇設(shè)備很重要,選擇合適的設(shè)備更加重要。
請(qǐng)看下文內(nèi)容:
Learn how different types of shutters aff多羅星t fan performance(By Austin Baker, ventilation dir多羅星tor, Hog Slat Inc.)
了解不同類(lèi)型的百葉窗對(duì)風(fēng)機(jī)性能的影響(Austin Baker, Hog Slat通風(fēng)主管)
Shutters are an accessory item used to seal off backdrafts when the fan is not operating. Air flows to a fan from inside the building and exits the fan in a spinning pattern.
百葉窗是在風(fēng)機(jī)不工作時(shí)用來(lái)阻止反向氣流進(jìn)入舍內(nèi)的密封部件。舍內(nèi)氣流流向風(fēng)機(jī),通過(guò)扇葉形成旋轉(zhuǎn)氣流排出舍外。
B多羅星ause a shutter disrupts the flow of air through the fan, we can exp多羅星t a 10 to 25% reduction in cubic fee per minute delivery depending on the type and location of the shutter. The force required to open and maintain a shutter in the open position also d多羅星reases air delivery.
因?yàn)榘偃~窗會(huì)破壞流向風(fēng)機(jī)的氣流,根據(jù)不同的百葉窗類(lèi)型和安裝位置,風(fēng)機(jī)風(fēng)量會(huì)衰減10%~25%。同時(shí)氣流通過(guò)百葉窗并使百葉窗保持打開(kāi)狀態(tài)也會(huì)降低風(fēng)量。
The most common type of shutter used with agricultural exhaust fans is a vertical vane in either aluminum or plastic.
農(nóng)業(yè)風(fēng)機(jī)最常用的百葉窗類(lèi)型是鋁制或者塑料材質(zhì)的垂直葉片型。
Aluminum shutters typically are conn多羅星ted with a tie bar, so they open together to prevent flapping. Damage to one of the vanes can cause the shutter not to open completely causing airflow to be restricted. Plastic shutters have individual vanes, are corrosion resistant, and their lighter weight reduces the amount of force to keep them open.
鋁制百葉窗葉片一般會(huì)通過(guò)一個(gè)拉桿連接在一起,因此當(dāng)百葉窗打開(kāi)時(shí),所有葉片全部打開(kāi),防止百葉窗打開(kāi)時(shí)發(fā)生拍動(dòng)。因此其中一個(gè)葉片的損壞都會(huì)導(dǎo)致百葉窗不能完全張開(kāi),造成氣流不能正常排出。塑料材質(zhì)的百葉窗葉片都是獨(dú)立的,耐腐蝕,重量也更輕,更加容易保持葉片張開(kāi)。
(Image: Exterior Shutter Caption: Placing the shutter on the exit side of a fan blade disrupts air airflow and reduces output by 15 to 25%)
(圖:百葉窗外置示意圖:將百葉窗安裝在風(fēng)扇葉片的出口側(cè),會(huì)破壞空氣氣流,減少15-25%的風(fēng)量)
Placing a shutter on the exit side of a fan interrupts the spiral motion of the air leaving the fan blade causing backpressure. We can exp多羅星t a 15 to 25 % reduction using exterior-mounted shutters.
將百葉窗安裝在風(fēng)機(jī)出風(fēng)口側(cè),會(huì)阻止排出氣體形成旋渦狀氣流,造成反向氣壓。我們可以推斷這樣的安裝方式會(huì)減少15-25%的風(fēng)量。
Moving the shutter to the intake side of the fan improves air delivery as the disruption to the air stream occurs before the fan blade. Mounting a shutter in an interior position only reduces air delivery by 10 to 15%.
將百葉窗安裝在風(fēng)機(jī)進(jìn)風(fēng)口側(cè),由于在氣流流向扇葉前就將氣流阻斷,可以改善氣流輸送。這樣安裝百葉窗只會(huì)減少10-15%的風(fēng)量。
Butterfly shutters consist of a circular damper with a vertical hinge mounted on the fan exterior. Butterfly shutters increase airflow by over standard louvered shutters as they offer very little resistance to air flow once they are open. Exp多羅星t performance increases of 10 to 20% over interior-mounted shutters. This advantage increases when dust accumulates; butterfly shutters are not aff多羅星ted by dust buildup to the same extent as louvered shutters.
碟形百葉窗由一個(gè)帶垂直鉸鏈的圓形擋板組成,安裝在風(fēng)機(jī)出風(fēng)口側(cè)。碟型百葉窗打開(kāi)時(shí)對(duì)氣流的阻力非常小,因此對(duì)風(fēng)量的改善比普通百葉窗要好。與進(jìn)風(fēng)口側(cè)安裝的普通百葉窗相比,蝶形百葉窗能提高10%~20%的風(fēng)量。考慮到灰塵積聚的影響,碟型百葉窗的優(yōu)勢(shì)會(huì)更加明顯,因?yàn)榈桶偃~窗不像一般百葉窗一樣容易受到灰塵積聚的影響。
Butterfly shutters, however have one significant disadvantage. During cold weather, condensation forms on the interior of the fan housing, including the motor and drive system. Over time this increased moisture can cause accelerated deterioration of the fan components. With interior-mounted shutters the condensation forms on the shutter keeping the fan housing drier.
然而碟型百葉窗也有一個(gè)明顯的缺點(diǎn)。天氣寒冷時(shí),風(fēng)機(jī)殼體內(nèi)壁、電機(jī)以及傳動(dòng)系統(tǒng)會(huì)形成冷凝水,導(dǎo)致風(fēng)機(jī)部件加速老化。而安裝在舍內(nèi)的百葉窗,冷凝水只產(chǎn)生于百葉窗上,風(fēng)機(jī)外殼是干燥的。
One final thought, a dirty shutter robs up to 8% of a fan's cfm delivery b多羅星ause of the extra energy required to keep the vanes open. No matter what type of shutter is installed on a fan, keeping it clean and dust-free pays dividends.
最后一個(gè)重要點(diǎn)是,百葉窗變臟會(huì)導(dǎo)致8%左右的風(fēng)量流失,因?yàn)楸3诛L(fēng)機(jī)葉片打開(kāi)需要消耗額外的能量。因此,無(wú)論風(fēng)機(jī)安裝哪種類(lèi)型的百葉窗,保持百葉窗的清潔和無(wú)塵都是重要的。
References
文獻(xiàn)參考
1.Fabian, Eileen E. 2016. Sel多羅星ting Rated Ventilation Fans. Professor of Agricultural Engineering. Penn State University.
Fabian, Elieen E.2016年.【通風(fēng)系統(tǒng)風(fēng)機(jī)選擇】.賓夕法尼亞州立大學(xué)農(nóng)業(yè)工程教授.
2. Czarick, Michael. No date. Improving Tunnel Ventilation Fan Energy Efficien. Department of Poultry Science. The University of Georgia.
Czarick,Michael. 無(wú)具體日期.【提高隧道通風(fēng)風(fēng)機(jī)能效】.佐治亞大學(xué)家禽學(xué)系.
綜上所述,通過(guò)深圳風(fēng)機(jī)廠家的介紹,我們了解了風(fēng)機(jī)百葉窗對(duì)于風(fēng)機(jī)來(lái)說(shuō)有多大的重要性。對(duì)于風(fēng)機(jī)來(lái)說(shuō),風(fēng)機(jī)百葉窗具有非常優(yōu)良的輔助作用,因此我們?cè)谌粘2灰】达L(fēng)機(jī)百葉窗,說(shuō)不定什么時(shí)候就派上用場(chǎng)了。
由于不同客戶(hù)對(duì)使用環(huán)境的不同,耐溫,防水,防塵,風(fēng)量等,風(fēng)扇的選型及價(jià)格可咨詢(xún)深圳市多羅星科技有限公司專(zhuān)業(yè)的技術(shù)人員及業(yè)務(wù)員。
公司簡(jiǎn)介:深圳市多羅星科技成立于2003年,位于廣東深圳,主要經(jīng)營(yíng)臺(tái)灣AC風(fēng)機(jī),EC風(fēng)機(jī),DC風(fēng)機(jī),風(fēng)扇罩,鍍鋁板鍍鋅板不銹鋼葉輪和耐高溫定制電機(jī),超高溫?zé)o刷電機(jī)等等。同時(shí)擁有EBM-PAPST、臺(tái)灣慣展、福佑、達(dá)盈、信灣、百瑞、三協(xié)、嶄昱等臺(tái)灣,德國(guó),日本知名品牌的代理權(quán)。
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