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Phase Change Materials: Peeps experience?  RSS feed

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Hi all
Im new to this site and have done cursory searches for PCMs (phase Change Materials)
In a nutshell I am constructing a 3 x 8m poly carb twin wall “glasshouse” and am going to need to exothermically pump heat back into it especially on winter cold nights where it gets down to -5C.
The idea is to line the house inside perimeter with 25L black drums (stacked x2 high, 200L drums in the corners) and use PCMs to seep heat back into it in the wee hours. Read; tropical plants and orchids!
I am looking at Calcium Chloride crystals (Damp Rid) or Octadecane paraffin. They are quite a lot of other chems that are not volatile that are suitable but I won’t go into it initially.
Just simply interested in peoples thoughts and experience with this scenario. (expansion rates, latent heat absorbency, quantities in suspension, additives, vermiculite, perlite etc)
Hopefully some of you may have already gone down this track and can shed some light on this quite confusing arena (unless you are a chem engineer!)
many thanks,
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Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
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Andrew Neil : A big welcome to Permies.com and sister site Richsoil.com Permies.com with over 35,000 Fellow Members World-wide

is now your 24 / 7 place to talk to someone who wants to talk about what you want to talk about !

In the upper right of this page below the permits banner is the Permies Tool box, when you click on the Search word it will take you to a new page,

enter Phase Change Materials, in the 1st search field box, then scroll down to the 2nd box -scroll up to find and click on All Available to select a search

in all forum threads ! Next scroll down and select for a google search within Permies.com and click on search ==-----> I found 313 hits! Happy hunting.

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I hope you find this useful and timely, looking forward to many new conversations, remember a rising tide floats All Boats ! Big AL
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Location: Cache Valley, zone 4b, Irrigated, 9" rain in badlands.
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Coconut oil seems like it would have an ideal phase change temperature range for use in a tropical greenhouse...

andrew neil
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Hi Joseph
thinking more hitech using calcium chloride hexhydate (Galaubers Salts. There is a dude on this forum Rich that is trying to do exactly same as me. ie; ringing the GH with black HDPE black drums to provide nightly heat. Call me a newbie but I need to keep ambient night time temps above freezing. Outside it will get to minus 5C. Also looking at simplistic bubblewray. btw its a twin wall polycarb structure.
Any constructive thoughts greatly appreciated
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