Phase change material-containing composition and related products and methods
The present invention provides methods of producing manufactured aggregates and other compositions from an encapsulated PCM slurry, suspension or emulsion by combining a cementitious binder and a adsorbent and/or absorbent with the PCM slurry. The encapsulated PCM-containing composition can be produced in an agglomeration process. The ingredients can also be mixed to form a viscous mass which can be extruded or otherwise formed to produce useful products.
1. A phase change material-containing composition, comprising:
phase change material;
sorbent comprising a clay; and
cement binder comprising an acid-base cement;
wherein the phase change material comprises at least 40 weight percent of the composition and wherein the phase change comprises an organic phase change material.
2. The composition according to claim 1 , comprising the sorbent at a weight ratio to the phase change material in a range of from 0.01:1 to 2:1.
3. The composition according to claim 1 , wherein the cement binder is a magnesium phosphate cement.
4. The composition according to claim 1 , comprising the cement binder at a weight ratio to the phase change material in a range of from 0.04:1 to 1:1.
5. The composition according to claim 1 , wherein the phase change material is contained in particles bound within the composition.
6. The composition according to claim 5 , wherein the particles are of a size in a range of from 1 micron to 3 millimeters.
7. The composition according to claim 1 , wherein the composition has a phase change enthalpy of at least 50 joules per gram of the phase change material.
8. The composition according to claim 1 , comprising non-chemically bound water at a weight ratio to the sorbent of at least 0.4:1.
9. The composition according to claim 1 , having a Euroclass fire rating of C or higher.
10. The composition according to claim 1 , wherein the composition is in the form of a monolithic mass.
11. The composition according to claim 10 , wherein the monolithic mass is in the form of a sheet board.
12. The composition according to claim 10 , wherein said monolithic mass is bonded to another component of a building product.
13. The composition according to claim 10 , wherein said monolithic mass is molded.
14. The composition according to claim 1 , wherein the composition is in the form of a batch of particles, wherein at least 90 weight percent of the particles of the composition are smaller than 1 inch (25.4 millimeters).
15. The composition according to claim 14 , wherein at least 90 weight percent of the particles of the composition are larger than 100 microns (0.1 mm).
16. The composition according to claim 15 , wherein the particles of the composition are bound in a matrix.
17. A phase change material-containing composition, comprising:
phase change material;
sorbent comprising a clay; and
cement binder comprising an acid-base cement;
wherein the phase change material comprises at least 40 weight percent of the composition, and wherein phase change material comprises an inorganic salt.