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Colin Port
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Hydraulic equations
Replied Jan 3
Hydraulic equations
Replied Jan 3
Hydraulic equations
19 Replies
Started this discussion. Last reply by Joy Beth Moser Apr 12.
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Keenan Mulvaney said:Pump operators at the University Fire Department are trained to memorize a given set of GPM's, Frictions losses and operations and use a standard equation for hydraulic calculations. We train so that operators have a thorough ...
Pump operators at the University Fire Department are trained to memorize a given set of GPM's, Frictions losses and operations and use a standard equation for hydraulic calculations. We train so that operators have a thorough understanding of fiel...
Bob Franklin said:Hi Colin,
We developed a simple "rule of thumb" friction loss for our engineers. 1-1/2 hose is 30 psi per 100
1-3/4 hose is 20 psi per 100
2-1/2 hose is 10 psi per 100Bob, did you guys test your hose and pumps to validate your n...
+1 on what this guy said.
If you really want to know what you're flowing you're going to have to get the flow meter and pitot gauge. Every fire apparatus has different bends, valves, and whatnot even if they're sister vehicles. The point here is ...
Hi Colin,
We developed a simple "rule of thumb" friction loss for our engineers. 1-1/2 hose is 30 psi per 100
1-3/4 hose is 20 psi per 100
2-1/2 hose is 10 psi per 100
3 hose is 5 psi per 100
All you have to add is your nozzle pressure and lenght...
Here is a power point presentation you may wish to view.
http://www.tft.com/newsite/literature/library/files/05fire%20ground.ppt
If you contact the companies that manufacture the hose, nozzles and other water delivery applicances your department ...
Profile Information
- Residence.
- Groom Creek
- Department:
- Groom Creek Fire District
- Title/rank:
- Captain
- Years of public service:
- 4
- Agency structure:
- Combination fire department
- Top issues in your department:
- Keeping up with neighboring agencies, as we have a very low call volume.
- Professional Qualifications:
- Volunteers, no quals needed, agency task book
Reserves, EMT B, FF I&II, Wildland FFT2, agency task book
Full time varies, a few of us with AAS in fire science, Medics, postion taskbooks, tons of other training locally and regionally.
- Topics you provide training for:
- All aspects of fire and ems and specific target hazards of our response area.
- Areas of expertise:
- We have a very heavy emphasis on wildland fire. We do have two medics for our ems needs, and although we do not have a lot of structure fires we train as if they happen frequently.
- Bio:
- I have been a captain for one year. I have an AAS of fire science. I am currently in medic school. I am a father and husband and we live near work, so area familiarization is pretty easy to do, with out trying. I love to come to work and love to teach as much as learn.
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Comment Wall (1 comment)
- At 9:19am on April 7, 2009,
Dave Walsh said…
- FYI: I echo the comments about testing your hose and nozzle combinations; take nothing for granted. Hose is not all the same; one brand of 1 3/4" we recently evaluated suffered twice the friction loss of another brand of 1 3/4"; different liners, different inner diameters; 1 3/4" hose isn't always 1 3/4". One hose we evaluated was 1.88". inner diamter.
We created a one-stop shopping Excel file that will do whatever hydraulic calcs you need to do. Obviously it's not a field application but may be usefull during training, pre-plans, pump classes, etc.
It is posted at http://faculty.sunydutchess.edu/walsh/EXCEL_RESOURCES-resourceseo_resources_copy.htm
It's the last line in the table. Right click on the file's hyperlink to 'save target as" (download/save)
Make sure you test your automatic nozzles regualrly as their interior springs can "stick" and thus drastically affect your flow (even though the stream will look the same)
Good luck- nothing is more vital to an interior firefight than a good hose/nozzle combination (manned by well trained firefighters in conjunction with a strong command, effective/timely ventilation, etc, etc.)
Dave
walsh@sunydutchess.edu
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