Originally Posted by u3b3rg33k
Those temp changes were more than likely due to blocks or radiators not being full (rads & blocks that aren't full don't work as designed)- if I lost 100ml from my loop it'd be near empty (or maybe completely empty - I'm not sure it )! as a percentage of the whole, loops DON'T loose much heat to the environment - plastic tubing and plastic reservoirs are poor conductors of heat, and have rather poor surface area to volume ratios. radiators are both made of good conductors (Cu/Al) and have an awesome surface area to volume ratio.
Insofar as an ideal olympic (50x25m, 2500000L) swimming pool is concerned, it would take a 1500w heater 12 weeks to raise the temperature from 18ºC to 19ºC. so yes, a swimming pool would be "ideal" for a reservoir / heatsink. but it's not because of the reason that was originally stated - more mass doesn't mean the kettle can't heat it - 20L would only take under a minute per degree - so for non-supermassive systems, you eventually reach equilibrium regardless of the mass. 2 million liters is a few orders of magnitude apart from 20L.
Hmm, I think everything was definitely still full...I should have added that my res and pump is the highest point in the loop, so they would have shown off how much liquid had leaked out. Usually when you bleed out a loop for the first time, you get tons of bubbles and churn, but this was just pure water.
When I touch parts of my loop though while my machine has been rendering for a day straight, there's some noticeable warmth coming off everything...that means it's getting some dissipation from conduction everywhere and not just the radiator, and there's some airflow in the case which means convection is going on in there as well. The reservoir gives off warmth all over too.
All I'm really saying is that in our world with 3 constant types of heat loss, a kettle even given two weeks wouldn't actually heat that pool by 1 degree, because the water's heat loss from conduction, convection, and radiation out paces the heat generated by the kettle. In a perfect physics problem without those factors, the water would get warmed over time. In the real world though, the more flowing liquid mass you can surround a heat source with, at some point it cannot warm the liquid any more due to C/C/R. There stops being a theoretical time per 1C, and it simply becomes impossible.
I'm not suggesting that a 250mm tall res makes much difference, only just that it makes some difference at all.
Anyway, I ordered all the stuff tonight and just wanted to thank you guys for being so helpful! Here's the final list:
Edited by kweechy - 11/23/12 at 1:26am
It added up quick, and apparently I've ended up spending over $500 on a WC setup =\
Oh well, it will be fun.