Method of increasing the relative heat capacity of a pumpable dielectric heat transfer carrier liquid

• US 6,063,312 A
• Filed: 02/22/1996
• Issued: 05/16/2000
• Est. Priority Date: 02/05/1993
• Status: Expired due to Term

• Current Assignee: Southwest Research Institute
• Original Assignee: Southwest Research Institute
• Inventors: Mannheimer, Richard J.
• Primary Examiner(s): OGDEN JR, NECHOLUS
• Application Number:
  US08/605,680
• Time in Patent Office: 1,545 Days
• Field of Search: 252/70, 252/570, 252/574, 252/572, 252/578, 165/53, 165/10, 165/104.7, 165/104.11, 428/212, 427/402
• US Class Current: 252/572
• CPC Class Codes: C09K 5/063 Materials absorbing or liberating heat during crystallisation; Heat storage materials
• CPC Class Codes: C09K 5/10 Liquid materials
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree

Abstract

A pumpable heat transfer composition comprising a carrier liquid, a phase change material insoluble in the carrier liquid, and a solid microporous structure. The invention also comprises the method of making this composition.

Claims

1. A method of increasing the relative heat capacity of a pumpable dielectric heat transfer carrier liquid comprising adding thereto a solid microporous structure containing therein a phase change material, wherein said carrier liquid is a polyalphaolefin and said solid microporous structure is an amorphous silica, a zeolite, a crystalline aluminophosphate, an aluminosilicate, or mixtures thereof, wherein said phase change material is encapsulated before being admixed with said carrier liquid.

3. The method of claim 1 wherein said phase change material is a polyoxyethylene stearate, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyethylene glycol, a mixture of polyethylene glycols, a mixture of a polyethylene glycol and water, or mixtures thereof.

2. A method of increasing the relative heat capacity of a pumpable dielectric heat transfer carrier liquid comprising adding thereto a solid microporous structure containing therein a phase change material, wherein said carrier liquid is a polyalphaolefin, said solid microporous structure is an amorphous silica, a zeolite, a crystalline aluminophosphate, an aluminosilicate, or mixtures thereof, and said phase change material is first absorbed in said solid structure then admixed with said carrier liquid.

4. The method of claim 2 wherein said phase change material is a polyoxyethylene stearate, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyethylene glycol, a mixture of polyethylene glycols, a mixture of a polyethylene glycol and water, or mixtures thereof.