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pladijs · 01-26-13, 12:10 PM

Kostas,

I do like the simplicity of the double cross-flow core approach. I regret the ton of work that i put into that counter-flow alu-foil experiment of mine; good thing it didn't cost too much.

I would be very (very!!)

interested in learning more on how you actually did build your cores.

What material did you use? People here talk about coroplast, is that compareable to "polycarbonate panels"? Did you leave spaces between the "coroplast" layers? (kind of like here http://ecorenovator.org/forum/26367-post226.html, to me that sounds like a very good way to do it). Are you still convinced that the coroplast core performs rather compareable to the alu one? Do you have an idea of your efficiency at different airflows?

If you do not glue, how do you prevent leakage? just by pressing the frames together tightly? Would you do anything differently in your setup? Do you think it is possible to do this with alu foil, rather than "solid" plates? I do not have such plates lying around, they are damn expensive to buy as far as I can tell.

Many many questions!

PS something unrelated i have wanted to ask for a while, regarding http://ecorenovator.org/forum/26465-post245.html , wouldn't it be better to heat the air after the HR? if you have a really efficient HR, say 95%, with pre-heating, you will never get to 100%, with post heating you could. And isn't the heat transer most efficient when the temperature difference is the largest?

01-26-13, 12:10 PM	#364
pladijs Lurking Renovator Join Date: Jan 2012 Location: belgium Posts: 13 Thanks: 2 Thanked 2 Times in 2 Posts	Kostas, I do like the simplicity of the double cross-flow core approach. I regret the ton of work that i put into that counter-flow alu-foil experiment of mine; good thing it didn't cost too much. I would be very (very!!) interested in learning more on how you actually did build your cores. What material did you use? People here talk about coroplast, is that compareable to "polycarbonate panels"? Did you leave spaces between the "coroplast" layers? (kind of like here http://ecorenovator.org/forum/26367-post226.html, to me that sounds like a very good way to do it). Are you still convinced that the coroplast core performs rather compareable to the alu one? Do you have an idea of your efficiency at different airflows? If you do not glue, how do you prevent leakage? just by pressing the frames together tightly? Would you do anything differently in your setup? Do you think it is possible to do this with alu foil, rather than "solid" plates? I do not have such plates lying around, they are damn expensive to buy as far as I can tell. Many many questions! PS something unrelated i have wanted to ask for a while, regarding http://ecorenovator.org/forum/26465-post245.html , wouldn't it be better to heat the air after the HR? if you have a really efficient HR, say 95%, with pre-heating, you will never get to 100%, with post heating you could. And isn't the heat transer most efficient when the temperature difference is the largest?