Phase change material pack
A transportable PCM (phase change material) module comprises a number of PCM packs; a housing for thermally insulting said number of PCM packs from a module's surrounding medium; spaces separating said packs and forming one or more channels for the flow of a fluid; said housing incorporating a fluid inlet and a fluid outlet; whereby, in use, fluid flows through said channels from said inlet to said outlet. A PCM (phase change material) pack comprises a laminate of a first conducting panel and a second conducting panel enclosing a portion formed primarily of PCM; wherein said portion of PCM incorporates thermal conductors. A PCM (phase change material pack) comprises an envelope of relatively highly thermally conductive material enclosing a portion formed primarily of PCM; wherein said PCM portion incorporates a conductive compound mixed into said PCM which comprises carbon black particles.
1. A phase change material pack for a climate control system, the pack comprising a phase change material composition in an envelope of material of thermal conductivity, wherein the phase change material composition comprises
(a) between 50 and 99% by weight of a hydrate of sodium sulphate and at least one of
i) more than 0% and less than 15% by weight of sodium chloride, and
ii) more than 0% and less than 15% by weight of paraffin;
(b) the composition further comprising more than 0% and less than 15% by weight of carbon black and having a melting point between 20 and 30 degrees centigrade.
2. A pack as claimed in claim 1 , wherein the composition comprises more than 0% and less than 15% by weight of paraffin.
3. A pack as claimed in claim 1 , wherein the hydrate of sodium sulphate is sodium sulphate decahydrate.
4. A phase change material pack for a climate control system, the pack comprising a phase change material composition in an envelope of material of thermal conductivity, wherein the phase change material composition comprises
(a) between 50 and 99% by weight of a hydrate of calcium chloride and at least one of
i) more than 0% and less than 15% by weight of potassium chloride, sodium chloride, ammonium chloride, or combinations thereof, and
ii) more than 0% and less than 15% by weight of paraffin,
(b) the composition further comprising more than 0% and less than 15% by weight of carbon black and having a melting point between 20 and 30 degrees centigrade.
5. A pack as claimed in claim 1 , wherein the composition comprises more than 0% and less than 10% of a thickening agent.
6. A pack as claimed in claim 1 , wherein the composition comprises more than 0% and less than 10% of a nucleating agent.
7. A climate control system utilising a pack as claimed in claim 1 .
8. A pack as claimed in claim 4 , wherein the hydrate of calcium chloride is calcium chloride hexahydrate, calcium chloride tetrahydrate or calcium chloride dehydrate.
9. A pack as claimed in claim 4 , wherein the composition comprises more than 0% and less than 15% by weight of paraffin.
10. A pack as claimed in claim 4 , wherein the composition comprises more than 0% and less than 10% of a thickening agent.
11. A pack as claimed in claim 4 , wherein the composition comprises more than 0% and less than 10% of a nucleating agent.
12. A climate control system utilising a pack as claimed in claim 4 .