Low cost high efficiency automotive turbines

• US 6,681,557 B2
• Filed: 02/01/2002
• Issued: 01/27/2004
• Est. Priority Date: 02/24/1997
• Status: Expired due to Term

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Wilson, David Gordon
• Primary Examiner(s): Casaregola, Louis J.
• Application Number:
  US10/062,961
• Publication Number:
  US 20020124991A1
• Time in Patent Office: 725 Days
• Field of Search: 60/395.11, 60/395.12, 165/8, 165/9
• US Class Current: 60/39.512
• CPC Class Codes: F02C 7/105 of the rotary type rotary heat exchangers per se F28D
• CPC Class Codes: F23L 15/02 Arrangements of regenerators
• CPC Class Codes: F28D 19/042 Rotors; Assemblies of heat absorbing masses
• CPC Class Codes: F28D 19/047 Sealing means
• CPC Class Codes: Y02E 20/34 Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

An automotive turbine regenerator system employs sectored matrix elements which are extruded and then assembled into the larger rotary regenerator. Discontinuous rotation is taught such that the seals are not rubbing seals but rather are clamping seals thus radically reducing the leakage and the wear on seal components.

Claims

1. An engine comprising:

a multiple-stage low-pressure-ratio turbine;

a multiple-stage low-pressure-ratio compressor in operable communication with said turbine;

a sectored rotary regenerator;

means for discontinuously rotating the rotary regenerator; and

a seal system having a plurality of seals in communication with said regenerator, said seal system releasing said seals from contact with said regenerator before said discontinuous movement of said regenerator and clamping said seals against said regenerator after said discontinuous movement of said regenerator has terminated.

2. An engine as claimed in claim 1 wherein said turbine is a three-stage turbine.

3. An engine as claimed in claim 1 wherein said compressor is a three-stage compressor.

4. An engine as claimed in claim 1 wherein said rotary regenerator consists of ceramic material.

5. An engine as claimed in claim 4 wherein said ceramic material is silica nitride, cordierite, mullite, magnesetun alumina silicate, aluminum silicate and combinations containing at least one of the foregoing.

6. An engine as claimed in claim 1 wherein said multiple stage compressor includes compressor stages comprising one of carbon fiber reinforced plastics, die cast metals and combinations including at lest one of the foregoing.

7. An engine as claimed in claim 6 wherein said die cast metals are one of magnesium and aluminum and combinations including at least one of the foregoing.