Seminar 3 - Fluid Delivery Subsystem
Notes
Presenter: Remo (soCE) Marine renewable energy and environmental engineering
Fluid Delivery - the Fire Triangle
A fire can be prevented or extinguished by removing any one of the elements in the fire triangle:
- Oxygen
- Heat
- Fuel
For example: Gas stove
The goal is to transport water from your vehicle to the ‘fire’ to remove heat.
Pressure
Pressure is measured by bar.
Fluid Delivery
Pushing water through a pipe system requires energy to overcome friction and lift water (push against gravity)
Energy
A pump feeds energy (Pressure) into the flow of fluid
Bernoulli’s principle:
Pumps
There are two types of pumps: Dynamic pumps and Positive Displacement Pumps.
Dynamic Pumps allow handling through dynamic forces. They pump the liquid using a type of spinning element. A rotating shaft generates dynamic forces. They use centrifugal force to generate pressure for fluid motion.
It requires priming - pump must be submerged in water prior to operation.
Positive Displacement Pumps is a reciprocating or rotary motion of pistons, plungers, diaphragms to transport fluid. The fluid discharge is in pulses. It operates at a higher efficiency at increasing pressure.
Things to Know
Know the technical specifications of your pumps (components)
- What are they used for?
- What are your system requirements?
- what are limitations?
Other Components to Think about
Resovioir
Shape, volume, location of pump, (immersible, subersible, outside), material, and insulation/preventing leakage.
Tubing / Piping
Inner/outer diameter, material, robustness, heat resistance, flexibility, cost, leakage