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气压罐计算

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2024年6月6日发(作者:禽晓凡)

消防稳压装置(水泵、气压水罐)的设计计算方法

问:消防稳压装置(水泵、气压水罐)的设计计算方法是什么?

答:稳压气压水罐有效贮水容积宜为Kx1=0.45m³,稳压水泵运行调节容积Vx2按式(2—10)计算

Vx2=1.254Kb/Qw (2—10)

式中 Vx2——稳压气压水罐的稳压泵运行调节容积(m³);

1.25——安全系数;

Qw——稳压泵设计额定流量(m³/h);消火栓系统稳压泵额定流量为5L/s(18m³/h),

自动喷水系统稳压泵额定流量为l L/s(3.6m³/h);

Kb——稳压泵lh内最大起动次数,Kb=10~20次/h。

稳压气压水罐无水时气压为Po(表压),不应小于消防给水系统的设计额定压力,亦即消防系统最不利点

消防设计压力。

稳压气压水罐内贮存水量为Vx1时,此时罐内气压为P1(表压),该压力亦即稳压泵的起泵压力。

稳压气压水罐内贮存水量为Vx1+ Vx2时,此时罐内气压为P2(表压),此时的压力值为稳压泵停泵压力,

按波义耳一马略特定律公式建立如下平衡方程

V(Po+0.1)=(V—Vx1)(P1+0.1) (2-11)

V(Po+0.1)=(V—Vx1一Vx2)(P2+0.1) (2—12)

则可得稳压气压罐总有容积

V=(P1-Po/P1+0.1)·Vx1 (2-13)

α=V/V-Vx1 (2-14)

式中 V——稳压气压罐的有效容积(m ³);

α——在额定贮水量时,罐内空气体积与气压水罐总容积之比,该值一般取0.65~0.85,特殊情况下可取

0.3~0.9

2024年6月6日发(作者:禽晓凡)

消防稳压装置(水泵、气压水罐)的设计计算方法

问:消防稳压装置(水泵、气压水罐)的设计计算方法是什么?

答:稳压气压水罐有效贮水容积宜为Kx1=0.45m³,稳压水泵运行调节容积Vx2按式(2—10)计算

Vx2=1.254Kb/Qw (2—10)

式中 Vx2——稳压气压水罐的稳压泵运行调节容积(m³);

1.25——安全系数;

Qw——稳压泵设计额定流量(m³/h);消火栓系统稳压泵额定流量为5L/s(18m³/h),

自动喷水系统稳压泵额定流量为l L/s(3.6m³/h);

Kb——稳压泵lh内最大起动次数,Kb=10~20次/h。

稳压气压水罐无水时气压为Po(表压),不应小于消防给水系统的设计额定压力,亦即消防系统最不利点

消防设计压力。

稳压气压水罐内贮存水量为Vx1时,此时罐内气压为P1(表压),该压力亦即稳压泵的起泵压力。

稳压气压水罐内贮存水量为Vx1+ Vx2时,此时罐内气压为P2(表压),此时的压力值为稳压泵停泵压力,

按波义耳一马略特定律公式建立如下平衡方程

V(Po+0.1)=(V—Vx1)(P1+0.1) (2-11)

V(Po+0.1)=(V—Vx1一Vx2)(P2+0.1) (2—12)

则可得稳压气压罐总有容积

V=(P1-Po/P1+0.1)·Vx1 (2-13)

α=V/V-Vx1 (2-14)

式中 V——稳压气压罐的有效容积(m ³);

α——在额定贮水量时,罐内空气体积与气压水罐总容积之比,该值一般取0.65~0.85,特殊情况下可取

0.3~0.9

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File: /www/wwwroot/www.usbmi.com/tmp/model_thread.func.php, Line: 662, well_thread_format(array(26))
File: /www/wwwroot/www.usbmi.com/tmp/view_template_d8_htm_read.htm, Line: 249, well_thread_find_asc(array(20) , 20)
File: /www/wwwroot/www.usbmi.com/tmp/route_read.php, Line: 204, include(/www/wwwroot/www.usbmi.com/tmp/view_template_d8_htm_read.htm)
File: /www/wwwroot/www.usbmi.com/tmp/index.inc.php, Line: 129, include(/www/wwwroot/www.usbmi.com/tmp/route_read.php)
File: /www/wwwroot/www.usbmi.com/index.php, Line: 29, include(/www/wwwroot/www.usbmi.com/tmp/index.inc.php)
Error[2]: Trying to access array offset on value of type int, File: /www/wwwroot/www.usbmi.com/xiunophp/xiunophp.min.php, Line: 54
File: /www/wwwroot/www.usbmi.com/tmp/model_thread.func.php, Line: 1096, humandate(1725959299)
File: /www/wwwroot/www.usbmi.com/tmp/model_thread.func.php, Line: 662, well_thread_format(array(27))
File: /www/wwwroot/www.usbmi.com/tmp/view_template_d8_htm_read.htm, Line: 249, well_thread_find_asc(array(20) , 20)
File: /www/wwwroot/www.usbmi.com/tmp/route_read.php, Line: 204, include(/www/wwwroot/www.usbmi.com/tmp/view_template_d8_htm_read.htm)
File: /www/wwwroot/www.usbmi.com/tmp/index.inc.php, Line: 129, include(/www/wwwroot/www.usbmi.com/tmp/route_read.php)
File: /www/wwwroot/www.usbmi.com/index.php, Line: 29, include(/www/wwwroot/www.usbmi.com/tmp/index.inc.php)
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