Two line of same flow with different lengths, no elevation

find:
a. Total friction loss for line A
b. Total friction loss for line B
c. PDP (pump discharge pressure) for line A
d. PDP for line B

Layout:
Line A=150' of 3" 300gpm combination nozzle
Line B= 300" of 3" 300gpm combination nozzle

Huh? ?????

Is this your real topic?

Umm guess so...

To find the total friction loss for Line A and Line B, as well as the Pump Discharge Pressure (PDP) for each line, we can use the friction loss formula and manipulate it to find the desired information. Here's how you can do it step-by-step:

1. Determine the diameter, length, and flow rate for each line:
- Line A: Diameter = 3 inches, Length = 150 feet, Flow Rate = 300 gallons per minute (gpm).
- Line B: Diameter = 3 inches, Length = 300 feet, Flow Rate = 300 gpm.

2. Calculate the friction loss per 100 feet for each line:
- Friction loss per 100 feet can be obtained from the fire service friction loss formula: FL = (CQ²L) / 100.
- Where FL is the friction loss, C is the coefficient of the nozzle (varies depending on the type of nozzle), Q is the flow rate in gpm, and L is the length in feet.

- Assuming the coefficient for the combination nozzle is 15 (this may vary), we can calculate the friction loss per 100 feet for each line:
- Line A: FL_A = (15 * 300² * 150) / 100.
- Line B: FL_B = (15 * 300² * 300) / 100.

3. Calculate the total friction loss for each line:
- Since the given lengths for Line A and Line B are different, we need to calculate the total friction loss separately for each line.
- Total Friction Loss = (FL / 100) * Length.
- For Line A: Total Friction Loss_A = (FL_A / 100) * 150.
- For Line B: Total Friction Loss_B = (FL_B / 100) * 300.

4. Calculate the Pump Discharge Pressure (PDP) for each line:
- PDP can be calculated using the following formula: PDP = NP + FL + EP.
- Where NP is the nozzle pressure (usually constant and provided separately), FL is the friction loss, and EP is the elevation pressure (assuming no elevation difference in this case).

- To find the PDP, we need to know the NP value for the combination nozzle (it can vary). Let's assume it is 50 psi.
- For Line A: PDP_A = 50 + Total Friction Loss_A.
- For Line B: PDP_B = 50 + Total Friction Loss_B.

Now, you can substitute the given values and perform the calculations to find the total friction loss for Line A and Line B (a and b) and the PDP for Line A and Line B (c and d) using the formulas mentioned above.