20.5. Head Loss Calculations

Try these first

1. 1.

   What is the definition of head loss?

   Hint

   Think about energy loss in pipes.

2. 2.

   Define turbulent flow.

   Hint

   Consider how water behaves in a fast-moving river.

3. 3.

   What is the purpose of the energy loss coefficient (K)?

   • To calculate pressure
   • To quantify energy loss
   • To determine flow type

   Hint

   Consider what happens at junctions in a pipe.

4. 4.

   Is head loss only caused by friction?

   • True
   • False

   Hint

   Think about how valves affect flow.

5. 5.

   Calculate head loss due to friction in a pipe with a known length, diameter, roughness and flow rate using the Darcy-Weisbach equation.

   Hint

   Ensure you have the correct friction factor for the flow type.

6. 6.

   Derive the modified Bernoulli’s equation including head loss terms for a system with a valve.

   Hint

   Identify all terms on each side carefully.