TFS · Hydraulic & Fluid Applications · Problem 6PDFSolution in PDF ↓
TFS · Hydraulic & Fluid Applications · Problem 6
Problem & Solution
Video Synthesis
Topic: Bernoulli / flow energy — A hotel with 400 units requires a maximum cold water supply of 5GPN per unit with a diversity factor of 60%.
Method: The supply line is 5,000 feet long and made of 8 inch stands are way steel with a roughness coefficient of C equals 130.
Key values: 80 PSIG, 80 psi, 5,000 feet long and made of 8 inch stands are way steel with a roughness coefficient of C equals 130
Reference: tables to look up how much loss there is going to be and we have
✅ Answer: A
Office Hours
1
Student questions asked in live office hours about this problem
OH 25
Q: Why don't you use the Hazen-Williams equation from the reference manual for this piping pressure drop problem?
A: The Hazen-Williams equation requires a specific coefficient C (the Hazen-Williams coefficient, not the surface roughness factor) that must be stated in the problem—it's rarely tested because it's pure plug-and-chug with no engineering judgment involved, so exam writers tend to avoid it in favor of problems that differentiate understanding.