笼养舍与平养舍的纵向工作压力为何不同

1、隧道通风的禽舍静压一. 隧道通风禽舍结构尺寸，i般长宽比10:1.二. 隧道通风多为负压式通风，有横向与纵向通风之分三. 对于横向通风鸡舍内部的任何位置静压值都相等四. 只有纵向通风，沿鸡舍纵向不同位置静压值会有不同值五. 横向通风需要时刻关注舍内静压六. 纵向通风不需要时刻关注舍内静压，但是可以以此判定设备运行状况七. 纵向通风鸡舍静压的组成1.湿帘阻力how do we determine pad area required to keep the incoming pressure below 0.06”？ with pad static pressure curves5 15 0.10

2、 ere) alnssaldsqesvelocity (ft/min)0254m/s no pad 4”6"2.转换阻力transition and pipe pressure as a function of average house air speedft/minm/s500. 2541000. 5081500. 7c22001.0162501.273001.5243501.7784002. 0324502. 2865002. 54英寸水柱帕斯卡000.012.50. 0250. 037.50. 04100. 0512.50. 06150. 0717.50. 0820ft/mi

3、nm/ s500. 2541000. 5081500. 7622001.0162501.273001.5243501.7784002. 0324502. 2865002. 545502. 7946003. 0486503. 3027003. 5567503.818004. 064transition pressure单位转换ft/minm/s1000.5082001.0163001.5244002.0325002.54eoo3.0487003.556soo4.064air speed (ft/min)pressure gain1000.00°200 o.o i 300o.o 13m4

4、000.02°5000.03°单位转换英寸水柱帕斯卡000.012.50.0133.250.0250.037.50.04511.250.06150.08201ui3管道阻力()pressure loss for air flowing down tunnel houseair speed (ft/min)pressure gain per 100*10002000.001 ”3000.002°4000.0035”5000.006”英寸水柱帕斯卡000.9010.250.0020.50.00350.8750.0061.50.90820.01230.01641u笼养与

5、平养的区别staticpressure increase per 100, of travel0.040英寸水柱帕斯卡000. 0512.50. 1250. 1537.50.2500. 2562.50.3750. 3587.50.41000.03530 o o5 0 52 2 i o o o o o oas= 0w3snmercial layer housebroiler houseaverage air speed (ft/min)s §sosss8§58rmcmmm寸ss94笼养舍管道阻力1n/broiler breeder houses0.04m to 008&quo

6、t;5整舍阻力鸡舍总压力=湿帘+洞口 + 纵向+ pipe+ shutters+ windtotal static pressure=15帕+ 2.5帕+75帕+ 5帕+ 7.5帕=42. 5 帕 total = pad + door + funnel + pipe + shutters + wind = 0.06m + 0.01 ” + 003" + 0.02n + 0.03" + 0.02"6不同尺寸湿帘的风阻relationship between tunnel inlet speed and static pressure英寸水谢帕斯卡000.0230.0

7、4100.06150.08200.1250.12300.14350.16400.18450.2502864216420 o o o o o o o o () anssad *13svelocity (ft/min)ono pad 4h 2” 一 6”ft/minm/s500.2541000.5081500.7622001.0162501.273001.5243501.7784002.0324502.2862.547有遮光罩的种鸡舍 不同品牌遮光罩压力曲线英寸水柱祐斯卡000. 0250. 04100. 06150. 08200. 1250. 12300. 14350. 16400. 18450

8、.2500. 22550. 2460ft/minm/s500. 2541000. 5081500. 7622001.0162501.273001.5243501.7784002. 0324502. 2865002. 545502. 7946003. 0486503. 302flpullet houses and static pressure65帕在计算种鸡舍静压时，如果尾端有遮光墙或者风机遮光罩，这两种产品的风阻要计算到总的 静压值上。在舍外增加遮光通道能产生多大的风阻，未知pullet houses it is the total pressure that is important we

9、 size our fans 0.15" static pressure we size our light traps so that the total static pressure does not exceed 0.15"对j：冇遮光罩的鸡舍，风机的风址按照37.5帕压力选取，遮光罩的压力降不允许 超过37.5帕7静压对风机的影响我们计算静压干啥？选择风机和数量one way to quantify this is comparing fan air flow ratio's air flow ratio = air flow (0.20")/a

10、ir flow (0.05°) air flow ratios typically range between 0.65 and 0.85 the closer to 1.0 the better the fan will hold up to high static pressures此数据反映了风机的抗压性能英寸水柱000. 0250. 04100. 06150. 08200. 1250. 12300. 14350. 16400. 18450.2500. 22550. 24600. 2665fan output vs. static pressure22.00020,00018.

11、00016.00014.00012.000i (hooo8,0006,0004.0002,0000static pressure8不同风速下不同鸡舍的工作压力风速 m/ s湿帘压降1. 778m/s转换压降/ 所有类型的 房舍looft 静 压增值每静压 増值每looft压增值每looft 压増 值平养舍简 易笼 (x3.5 )高端笼与笼养 蛋舍（x4.5 ）种鸡平养舍cx3）1.5212.53.250.51.752.251.52.0312.550.87533.752.52.5412.57.51.55.256.254.53.0512.511.25279.2563.5612.515310.513

12、.594.0612.5204141812abcdefg鸡舍的静压是有三大部分组成的:b+c+d/ b+c+e/ b+c+f/ b+c+g,并且随风速鸡舍长度的变化 而变化主要的三部分例如400ft k的鸡舍，400ft/m的风速，工作静压平养 p二0.05+0.02+0.0035x400/100=0.084笼养 p=0.05+0.02+0.015x400/100=0.13种鸡平养 p=0.05+0.02+0.01x400/100=0. 11800ft/m的风速，工作静压平养 p二0.05+0.08+0.016x400/100二0.194笼养 p二0.05+0.08+0.072x400/200二0.428种鸡平养 p=0.05+0.08+0.048x400/100=0. 322压力单位英寸水柱高风速带来的后果就是要求风机的高afr一般笼养舍长 300ft, 50