Radiation convection and conduction heat flow insulation barriers

• US 5,896,895 A
• Filed: 03/17/1995
• Issued: 04/27/1999
• Est. Priority Date: 08/16/1993
• Status: Expired due to Fees

• Current Assignee: Lockheed Vought Systems Corp (Martin Marietta Corporation)
• Original Assignee: Lockheed Vought Systems Corp (Martin Marietta Corporation)
• Inventors: Simpkin, William E.
• Primary Examiner(s): Brinson, Patrick F.
• Application Number:
  US08/407,437
• Time in Patent Office: 1,502 Days
• Field of Search: 138/149, 138/111-114, 138/137, 138/138, 138/140, 138/141, 138/143, 138/148, 62/555
• US Class Current: 138/149
• CPC Class Codes: F01K 23/02 the engine cycles being thermally coupled
• CPC Class Codes: F02C 1/105 construction; details
• CPC Class Codes: F28F 13/00 Arrangements for modifying heat-transfer, e.g. increasing, decreasing F28F1/00 - F28F11/00 take precedence
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A system for shielding an interior metal surface of a metal container from a hot fluid within the metal container wherein the hot fluid is at a temperature greater than a temperature limit of the metal, including a first insulating layer including metal clad insulation proximate the interior metal surface, a second insulating layer spaced from the first insulating layer including a perforated reflective metal shield and a third insulating layer spaced from the second insulating layer which is structurally stable and substantially inert to the hot fluid.

Claims

1. A system for shielding an interior metal surface of a metal container from a hot fluid within the metal container wherein the hot fluid is at a temperature greater than a temperature limit of the metal, said system comprising:

a first insulating layer including metal clad insulation proximate said interior metal surface, said metal clad insulation including reflective metal cladding and low thermal conductivity insulation;

a second insulating layer including a perforated reflective metal shield spaced from said first insulating layer; and

a third insulating layer spaced from said second insulating layer and including a composite which is structurally stable and substantially inert to said hot fluid at said temperature.

2. The system of claim 1, wherein said composite is made of carbon-carbon.

3. The system of claim 2, wherein the metal cladding comprises stainless steel foil.

4. The system of claim 2, wherein the hot fluid comprises a monatomic inert gas.

5. The system of claim 4, wherein the monatomic inert gas is selected from a group consisting of argon, helium and neon.

6. A system for shielding the interior metal surface of a steel container adapted to contain inert gas at a temperature beyond a temperature limit of the steel, said system comprising:

a first insulating layer including metal clad insulation proximate said interior metal surface, said metal clad insulation including stainless steel foil cladding and low thermal conductivity insulation ceramic fiber;

a second insulating layer comprising a perforated stainless steel foil metal shield spaced from said first layer; and

a third insulating layer spaced from said second insulating layer and comprising a carbon-carbon composite which is structurally stable and substantially inert to said gas at said temperature.

7. The system of claim 6, wherein the gas is a monatomic inert gas.