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kostas · 01-30-13, 10:19 AM

I think the problem with those measurements were the fans I used. The models were similar (looked identical but had no tecnical label on them) and over 10 years old, so I guess the air flows were unbalanced.
There were no ducts except for a piece of pipe (120mm diameter, 1mt long) that i had to use for the hair dryer to prevent the polystyrene casing from melting down.
As for the distanced PP core's performance I think the issue is the lack of small channels in the distanced flow which allows more air to pass through exchanging smaller amounts of temperature.
Sorry but I no longer have this HX as I used the material to built up the bigger ones I currently use.

@ ham789: thanks for your suggestions. I'm still waiting for that anemometer to arrive from the bay... I'll try to measure air flows as soon as possible.

01-30-13, 10:19 AM	#385
kostas Helper EcoRenovator Join Date: Dec 2012 Location: Venice, Italy Posts: 89 Thanks: 15 Thanked 41 Times in 19 Posts	I think the problem with those measurements were the fans I used. The models were similar (looked identical but had no tecnical label on them) and over 10 years old, so I guess the air flows were unbalanced. There were no ducts except for a piece of pipe (120mm diameter, 1mt long) that i had to use for the hair dryer to prevent the polystyrene casing from melting down. As for the distanced PP core's performance I think the issue is the lack of small channels in the distanced flow which allows more air to pass through exchanging smaller amounts of temperature. Sorry but I no longer have this HX as I used the material to built up the bigger ones I currently use. @ ham789: thanks for your suggestions. I'm still waiting for that anemometer to arrive from the bay... I'll try to measure air flows as soon as possible.