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SolarInterested

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Reply with quote  #1 
I noticed there wasn't anything about this type of collector on the forum so here are a few links to start this thread

On the BIS site - Dr. Thomason is known for the invention of the solar water heating trickle collector.
http://www.builditsolar.com/Projects/SpaceHeating/Thomason/ThomasonPatents.htm

John Canivan's site
http://www.jc-solarhomes.com/MTD/MTD_solar_heating.htm

Richard Heiliger's collector on the BIS site
http://www.builditsolar.com/Experimental/MTD/MTD.htm

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Both temperature rise and airflow are integral to comparing hot air collectors

SolarInterested

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MTD Center drain rotatable by Scott L

http://tech.groups.yahoo.com/group/SimplySolar/message/12495

Alaska 4x8 MTD hot water panel
Solar hot water sun tracking panel album
http://groups.yahoo.com/group/SimplySolar/photos/album/58191823/pic/list

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Both temperature rise and airflow are integral to comparing hot air collectors
72chevel

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Reply with quote  #3 
Thanks for posting these! Very interesting!
SolarInterested

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Reply with quote  #4 
The first part of both videos show another type of trickle down collector. In this version the water trickles down between two layers of transparent plastic sheeting (in a series of parallel channels) backed by an black aluminum plate.






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Both temperature rise and airflow are integral to comparing hot air collectors
Scott Davis

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Reply with quote  #5 
Thanks for adding the MTD content SI!
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72chevel

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Reply with quote  #6 
Those videos have good stuff in them I like the way Tom builds the frames with aluminum. Looking forward to his updates on the different plastic trickle materials. I am really leaning toward this type of solar panel of my roof!
SolarInterested

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Reply with quote  #7 
Thanks to stmbtwle for the video link:




Edit to add that John Canivan has released a series of new video about his MTD collector. I've included those below as of 2015/07/29

















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Both temperature rise and airflow are integral to comparing hot air collectors
stmbtwle

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Reply with quote  #8 
I see no reason the collector trough couldn't be INSIDE the collector, and thus protected from the rain and debris such as leaves. The collectors could be connected together in the usual fashion and a single drain run to the storage tank.

A length of "soaker hose" along the top of the collector might work for distributing the input water.

Ventilating the collector in the summer would not only prevent stagnation but would encourage evaporative cooling at night.

A fan coil inside the house might work for cooling as well as heating.

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Willie, Tampa Bay
Garage_Hermit

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Reply with quote  #9 
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A fan coil inside the house might work for cooling as well as heating.


Sure would !

(I was off to suggest the very same thing, but thought, "Willie already has one, he might bite my head off" !)

https://en.wikipedia.org/wiki/Fan_coil_unit

"Fan coil units are divided into two types: Two-pipe fan coil units or four-pipe fan coil units. Two-pipe fan coil units have one (1) supply and one (1) return pipe. The supply pipe supplies either cold or hot water to the unit depending on the time of year. Four-pipe fan coil units have two (2) supply pipes and two (2) return pipes. This allows either hot or cold water to enter the unit at any given time. Since it is often necessary to heat and cool different areas of a building at the same time, due to differences in internal heat loss or heat gains, the four-pipe fan coil unit is most commonly used."

G_H

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stmbtwle

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Reply with quote  #10 
Hmm interesting, I wasn't aware of that, thanks. I suppose one "pipe" could be used for solar and the other for backup heat/cool.



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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
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