New - Spring 2012 edition.
View the current issue.
Browse back issues.
Vanilla 1.0.3 is a product of Lussumo. More Information: Documentation, Community Support.
31 to 53 of 53
Posted By: SteamyTeamasses track the ambient pretty closely
Posted By: GotanewlifeYour graph just does not reflect how high mass houses perform, though sadly I am not informed enough to even speculate why your experiment isn't working.
Posted By: SteamyTeaBy isolating the experiment from solar gain as much as I can and making it airtight, by all having the same initial thermal properties, i.e. U-values, mass, location, shape and size etc, those factors can be discounted.
Posted By: fostertomST, lag, and indirectly decrement, depend on speed of travel of a temp wavefront thro the thickness a thermal mass material. That speed is dependent on the ratio of thermal resistivity to volumetric specific thermal capacity (not dependent at all, BTW, on initial delta-t - in other words greater delta-t doesn't drive the wavefront any faster).So if you scale the sample down, the wavefront's propagation speed stays the same so the wavefront simply gets thro the sample faster, and the decrement is less, in other words the effect of the thermal mass on the space becomes maybe negligible. Not just scaled down pro rata, so that you'd have to speed time up pro rata - but pretty well extinguished to meaninglessness.
Posted By: SteamyTeaQuestion is, should I insulate the base, sides and top or just the sides
Posted By: SteamyTeaResponse to mw116, got ot work out why the initial temperature difference makes no difference to the wave fron tin Toms suggestion before I respond to that.
Posted By: skyewrightOr maybe I missed something and you've already covered that angle?
Posted By: SteamyTeagot ot work out why the initial temperature difference makes no difference to the wave fron tin Toms suggestion
Posted By: SteamyTeaHaving thought about it a while (takes my mind of what I am really meant to be writing), All I need to do is to have one without any insulation, one with one layer and one with 2 layers, maybe a third with 3 and see what happens. No mass in any of them and insulated all over.Can always add mass as a third iteration.
Posted By: skyewrightThat sounds good (or at least interesting) to me.
Posted By: fostertomThe extra oomph of higher delta-t goes into greater amplitude, not frequency
© Green Building Press