Quote:
|
Originally Posted by ferdb
I've been thinking about the shaft seal leakage and it seems likely that this could be a result of the system being sealed with little to no air expansion space to accomadate pressure changes from thermal expansion. There could be significant pressure deltas between the system and atmospheric pressure. C-Systems may have only been working with vented systems. Including an expansion space in the system may be a possible work around.
Looking forward to getting my DDC's though so I can stop worrying about this aspect.
|
Your vinyl hoses provide enough resilience to limit pressure increase due to thermal expansion.
The thermal expansion coefficient of vinyl hoses is: 70-250 (x10-6 °C-1) from
efunda.com
Thermal expansion of water is about
: 2-5 (x10-4 °C-1) -From 20-60°C from
efunda.com
The vinyl expansion could cancel the thermal expansion of the water (or create a negative pressure).
You would have to estimate volumes and lengths and consider the tubing geometry (Circumference and length vs volume expansion).