Thermal insulation with thin phase change layer

• US 7,641,812 B2
• Filed: 09/19/2008
• Issued: 01/05/2010
• Est. Priority Date: 06/13/2007
• Status: Active Grant

• Current Assignee: Active Integration LLC
• Original Assignee: Robert J. Alderman
• Inventors: Alderman, Robert J.
• Primary Examiner(s): Green; Anthony J
• Application Number:
  US12/234,400
• Publication Number:
  US 20090011171A1
• Time in Patent Office: 473 Days
• Field of Search: 252/62, 252/70, 428/72, 428/76, 165/104.19, 165/104.21
• US Class Current: 252/70
• CPC Class Codes: C08K 3/01 characterized by their specific function
• CPC Class Codes: C09K 5/063 Materials absorbing or liberating heat during crystallisation; Heat storage materials
• CPC Class Codes: E04B 1/78 Heat insulating elements E04B1/7662 takes precedence
• CPC Class Codes: E04B 2001/742 Use of special materials; Materials having special structures or shape
• CPC Class Codes: F28D 20/02 using latent heat
• CPC Class Codes: F28D 2020/0008 the heat storage material being enclosed in plate-like or laminated elements, e.g. in plates having internal compartments
• CPC Class Codes: F28F 2270/00 Thermal insulation; Thermal decoupling
• CPC Class Codes: Y10T 428/234 including elements cooperating to form cells
• CPC Class Codes: Y10T 428/239 Complete cover or casing

Abstract

The present disclosure encompasses provides thermal stabilizer compositions comprising a phase change material admixed with a support material such as a diatomaceous earth, and a nucleator. The present disclosure further encompasses a heat insulation blanket for reducing heat transfer between adjacent spaces, comprising at least two plies of thermoplastic sheet material in superposed relationship and a seal, wherein the seal connects the plies of sheet material to form a cell containing a volume of a thermal stabilizer comprising a phase change material, a support material such as a diatomaceous earth, and a nucleator.

Claims

1. A thermal stabilizing composition, wherein the composition comprises a phase change material admixed with a support material, and a nucleator, wherein the phase change material comprises a supersaturated solution of calcium chloride hexahydrate, and wherein the support material comprises a diatomaceous earth intimately admixed with the nucleator, wherein the nucleator is calcium chloride dihydrate, said solid calcium chloride dihydrate maintaining the saturation level of the phase change material.

2. The thermal stabilizing composition of claim 1, further comprising a long-chain hydrocarbon, wherein the long-chain hydrocarbon is at least a C₁₂ hydrocarbon.

3. The thermal stabilizing composition of claim 2, wherein the long-chain hydrocarbon is octadecane.

4. The thermal stabilizing composition of claim 2, wherein the long-chain hydrocarbon is a paraffin wax.

5. A thermal stabilizing composition, wherein the composition comprises a phase change material admixed with a support material, and a nucleator, wherein the phase change material comprises a mixture of strontium chloride hexahydrate, potassium chloride and calcium chloride, and wherein the support material comprises a diatomaceous earth intimately admixed with the nucleator, wherein the nucleator is calcium chloride dihydrate.

6. The thermal stabilizing composition of claim 5, further comprising a long-chain hydrocarbon, wherein the long-chain hydrocarbon is at least a C₁₂ hydrocarbon.

7. The thermal stabilizing composition of claim 6, wherein the long-chain hydrocarbon is octadecane.

8. The thermal stabilizing composition of claim 6, wherein the long-chain hydrocarbon is a paraffin wax.

9. A thermal stabilizing composition, wherein the composition comprises a phase change material admixed with a support material, and a nucleator the thermal stabilizing composition comprising:

a first mixture, wherein the first mixture is a phase change material comprising about 200 parts by weight water, about 10 parts by weight strontium chloride hexahydrate, 10 parts by weight potassium chloride, 200 parts by weight anhydrous calcium chloride, and about 8 parts by weight of a hydrocarbon; and

a second mixture, wherein the second mixture comprises the diatomaceous earth support material admixed with calcium chloride dihydrate in the weight ratio of about 3;

1, and wherein the first and second mixtures are joined in a mixture of about 2 parts by weight of the first mixture to about 1 part by weight of the second mixture.

10. A thermal stabilizing composition, wherein the composition comprises a chase change material admixed with a support material, and a nucleator, wherein the phase change material comprises a mixture of strontium chloride hexahydrate, potassium chloride and calcium chloride, and wherein the support material comprises a diatomaceous earth intimately admixed with the nucleator, wherein the nucleator is calcium chloride dihydrate, and wherein the thermal stabilizing composition comprises a first mixture, wherein the first mixture is a phase change material comprising about 200 parts by weight water, about 10 parts by weight strontium chloride hexahydrate, 10 parts by weight potassium chloride and 200 parts by weight anhydrous calcium chloride, and a second mixture, wherein the second mixture comprises the diatomaceous earth support material admixed with calcium chloride dihydrate in the weight ratio of about 3:

1, and wherein the first and second mixtures are joined in a mixture of about 2 parts by weight of the first mixture to about 1 part by weight of the second mixture.