Examples
Examples
Try the starting example
- System water volume (litres)
- 200
- User-specified volume expansion (%)
- 4
- Precharge absolute pressure (bar)
- 2
- Maximum absolute pressure (bar)
- 4
- Expansion volume (litres)
- 8
- Ideal minimum vessel volume (litres)
- 16
Try another scenario
- System water volume (litres)
- 201
- User-specified volume expansion (%)
- 4
- Precharge absolute pressure (bar)
- 2
- Maximum absolute pressure (bar)
- 4
- Expansion volume (litres)
- 8.04
- Ideal minimum vessel volume (litres)
- 16.08
Calculation method
Calculation method
Expansion volume (litres)
Ideal gas acceptance fraction 1−Pprecharge/Pmaximum using absolute pressures; divide expansion volume by that fraction.
Ideal minimum vessel volume (litres)
Ideal gas acceptance fraction 1−Pprecharge/Pmaximum using absolute pressures; divide expansion volume by that fraction.
Symbols and units
- a
- System water volume (litres)
- b
- User-specified volume expansion (%)
- c
- Precharge absolute pressure (bar)
- d
- Maximum absolute pressure (bar)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Ideal isothermal worksheet; ignores reserve water, initial fill pressure, diaphragm limits and required safety margins. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.