G
Goldspoon
I'm not a "householder in distress" but maybe somebody can assist. I have recently obtained my Hetas qualification and am next endeavouring to learn as much about "wet systems" as I can. A colleague and I discussed heat sinks (he dislikes them because he likes to save every last bit of heat).
The scenario:
A large wood burning stove heats a thermal store via gravity 28's and the thermal store gets hotter and hotter. The rad circuit pump fails (powercut) and there is no specific heat sink rad designed in.
Question is: As long as the TRV's on the upstairs rads are open will they (or some of them) get hot via convection and dissipate heat? Note that for this discussion the main rads flow and return 22's DROP from the store and go under the floorboards before getting to rads via last bit of 15mm - drop is approx. 24" for return and 36" for flow.
He says they will get hot and therefore will act as heat sinks anyway - just choose your rad and make sure the valves cannot be closed. I do not know - my knowledge of convection suggests that cold water falls through lighter hot water (e.g. hot rises). however if this is the case then surely the DROP I mentioned earlier has cold at the bottom and hot at the top - so why would any kind of convection take place?
On another note - is a heat sink rad designed to prevent the stove and primary circuit boiling by preventing the gravity circuit slowing to a halt? Or is it designed to prevent the end result of everything boiling (everything being the stove and the thermal store which surely might eventually boil).
Any good reading on this subject?
Thank you in advance.
The scenario:
A large wood burning stove heats a thermal store via gravity 28's and the thermal store gets hotter and hotter. The rad circuit pump fails (powercut) and there is no specific heat sink rad designed in.
Question is: As long as the TRV's on the upstairs rads are open will they (or some of them) get hot via convection and dissipate heat? Note that for this discussion the main rads flow and return 22's DROP from the store and go under the floorboards before getting to rads via last bit of 15mm - drop is approx. 24" for return and 36" for flow.
He says they will get hot and therefore will act as heat sinks anyway - just choose your rad and make sure the valves cannot be closed. I do not know - my knowledge of convection suggests that cold water falls through lighter hot water (e.g. hot rises). however if this is the case then surely the DROP I mentioned earlier has cold at the bottom and hot at the top - so why would any kind of convection take place?
On another note - is a heat sink rad designed to prevent the stove and primary circuit boiling by preventing the gravity circuit slowing to a halt? Or is it designed to prevent the end result of everything boiling (everything being the stove and the thermal store which surely might eventually boil).
Any good reading on this subject?
Thank you in advance.