您好, 歡迎來到化工儀器網(wǎng)! 登錄| 免費注冊| 產(chǎn)品展廳| 收藏商鋪|
當(dāng)前位置:吉泰精密儀器(沈陽)有限公司>>技術(shù)文章>>管道漏風(fēng)量計算方法-SMACNA,美標(biāo)US講解分析
標(biāo)準(zhǔn) | 國家 | 描述 |
SMACNA HVAC Air Duct Leakage Test manual, First edition, 2012 | US | Duct construction leakage classification, expected leakage rates for sealed and unsealed ductwork, duct leakage test procedures, recommendations on use of leakage testing, types of test apparatus and test setup and sample leakage analysis. |
法規(guī)內(nèi)要求的計算公式如下:
Duct Class | 1/2-, 1-, 2-inwg | 3-inwg | 4-, 6-, 10-inwg |
Seal Class | C | B | A |
Sealing Applicable | Transverse Joints Only | Transverse Joints and Seams | Joints, Seams and All Wall Penetrations |
Leakage Class | |||
Rectangular Metal | 16 | 8 | 4 |
Round Metal | 8 | 4 | 2 |
Maximum air leakage is then defined as
F=CLP0.65
F = Maximum air leakage (cfm/100 ft2)
CL = Leakage class
P = Pressure (inwg)
以美國標(biāo)準(zhǔn)為例,測試時由客戶提出密封等級(Seal Class)和測試壓力P,
根據(jù)SMACNA標(biāo)準(zhǔn)確定Leakage Class CL,根據(jù)公式 F=CLP0.65 計算出最大泄漏率Fmax
為方便計算,提供如下測算表:
Allowable Leakage Factor (CFM/100 sq ft) | |||||||||||
Static pressure | 0 | 1 | 2 | 3 | 4 | 6 | 7 | 8 | 9 | 10 | |
CL | 1 | 0.0000 | 1.0000 | 1.5692 | 2.0423 | 2.4623 | 3.2048 | 3.5425 | 3.8637 | 4.1712 | 4.4668 |
2 | 0.0000 | 2.0000 | 3.1383 | 4.0847 | 4.9246 | 6.4096 | 7.0851 | 7.7275 | 8.3423 | 8.9337 | |
3 | 0.0000 | 3.0000 | 4.7075 | 6.1270 | 7.3869 | 9.6143 | 10.6276 | 11.5912 | 12.5135 | 13.4005 | |
4 | 0.0000 | 4.0000 | 6.2767 | 8.1694 | 9.8492 | 12.8191 | 14.1701 | 15.4550 | 16.6847 | 17.8673 | |
6 | 0.0000 | 6.0000 | 9.4150 | 12.2541 | 14.7737 | 19.2287 | 21.2552 | 23.1825 | 25.0270 | 26.8010 | |
8 | 0.0000 | 8.0000 | 12.5533 | 16.3387 | 19.6983 | 25.6382 | 28.3403 | 30.9100 | 33.3693 | 35.7347 | |
12 | 0.0000 | 12.0000 | 18.8300 | 24.5081 | 29.5475 | 38.4574 | 42.5104 | 46.3649 | 50.0540 | 53.6020 | |
16 | 0.0000 | 16.0000 | 25.1067 | 32.6775 | 39.3966 | 51.2765 | 56.6805 | 61.8199 | 66.7387 | 71.4694 | |
24 | 0.0000 | 24.0000 | 37.6600 | 49.0162 | 59.0949 | 76.9147 | 85.0208 | 92.7299 | 100.1080 | 107.2041 |
舉例如下:
Static pressure : 6
CL :6
則F = 19.2287 即最大限值Fmax
QL—泄漏風(fēng)量值(cfm)
Area—被測管道的表面積(ft2)
F<Fmax則被測管道合格
GTI 管道漏風(fēng)量測試機型號DALT6900,DALT6910儀器內(nèi)置以上標(biāo)準(zhǔn),無需計算,可以直接輸出判定結(jié)果,操作簡單方便!
請輸入賬號
請輸入密碼
請輸驗證碼
以上信息由企業(yè)自行提供,信息內(nèi)容的真實性、準(zhǔn)確性和合法性由相關(guān)企業(yè)負責(zé),化工儀器網(wǎng)對此不承擔(dān)任何保證責(zé)任。
溫馨提示:為規(guī)避購買風(fēng)險,建議您在購買產(chǎn)品前務(wù)必確認供應(yīng)商資質(zhì)及產(chǎn)品質(zhì)量。