David F Archer

US Patent:

7966104, Jun 21, 2011

Filed:

Mar 25, 2008

Appl. No.:

12/055057

Inventors:

Viraj Srivastava - Pittsburgh PA, US
Chellury R. Sastry - South Brunswick NJ, US
David H. Archer - Pittsburgh PA, US

Assignee:

Siemens Corporation - Iselin NJ

International Classification:

G05D 23/00

US Classification:

700299

Abstract:

A controller for controlling thermal sources affecting an air temperature in a space subjected to thermal variables, including a sensor network measuring the thermal variables; a feed forward controller generating a feed forward control signal based on an adaptive model including a model of the space and a model of the thermal sources, wherein the models are formed utilizing data from the sensor network; a feedback controller generating a feedback control signal based on a difference between an output of the feed forward controller and output from the space; and a combiner combining the feed forward and feedback control signals to produce a control signal for controlling the thermal sources to control the air temperatures of the space.

US Patent:

46674675, May 26, 1987

Filed:

Jun 4, 1985

Appl. No.:

6/741091

Inventors:

David H. Archer - Pittsburgh PA
James R. Hamm - Murrysville PA
Edward J. Vidt - Churchill Boro PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

F02G 300

US Classification:

60 3902

Abstract:

A method for electric power production or cogeneration of electrical power and process heat and/or steam that integrates a solid carbonaceous fuel gasification system and gas turbine system. Fuel gas produced in the gasification system is combusted and the combustion gases used in the gas turbine system. The gas turbine system uses water spray intercooling of the compressor or compressors, with air-water mixture from the compressor used in the gasification system, while hot exhaust gas from the turbine system has heat recuperated therefrom and is used to produce steam, which is also used in the gasification system.

US Patent:

44477481, May 8, 1984

Filed:

Apr 27, 1981

Appl. No.:

6/257682

Inventors:

William E. Young - Pittsburgh PA
Richard H. Lunn - Pittsburgh PA
David H. Archer - Pittsburgh PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H02N 402

US Classification:

310 11

Abstract:

High temperature corrosion and erosion resistant electrodes particularly useful for magnetohydrodynamic generators which electrodes utilize chemical ionization of combustion reactants to diffuse the current flow into the electrode. A combustible fuel, oxidant and electrically conductive material flow through porous, graded electrode components toward the plasma. Catalyzed combustion occurs near the face of the electrode exposed to the plasma which diffuses current transfer in the boundary layer and into the electrode. The reactants and combustion products thus combine simultaneously to cool the inner portions of the electrode, heat the outer portions, protect the exposed electrode surface from erosion, and alleviate the physical or chemical bonding of the by-products of coal combustion to the electrode surface which otherwise results in chemical degradation of the electrode.

US Patent:

46386297, Jan 27, 1987

Filed:

Mar 19, 1986

Appl. No.:

6/841670

Inventors:

David H. Archer - Pittsburgh PA
Frank I. Bauer - Perry Township, Perry County PA
Edward J. Vidt - Churchill Boro PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

F02C 328

US Classification:

60 3905

Abstract:

Electric power is produced in an electric power generating combustion turbine using a biogas as fuel thereto, where a biogas, leaving a biomass gasification system at an elevated temperature of 650. degree. -875. degree. C. and containing tars, is partially cooled by injection of a spray of water thereto to a lower temperature of about 260. degree. -555. degree. but above that which would condense tars. The partially cooled biogas stream is then filtered to remove solid particulate matter therefrom and is directly charged as fuel to the electric power producing combustion turbine for the production of electric power.

US Patent:

39816907, Sep 21, 1976

Filed:

Jan 15, 1975

Appl. No.:

5/541376

Inventors:

Joseph L. P. Chen - Murrysville PA
David H. Archer - Pittsburgh PA

Assignee:

The United States of America as represented by the United States Energy
Research and Development Administration - Washington DC

International Classification:

C10J 320

US Classification:

48 73

Abstract:

A method and apparatus for gasifying coal wherein the gasification takes place in a spout fluid bed at a pressure of about 10 to 30 atmospheres and a temperature of about 1800. degree. to 2200. degree. F and wherein the configuration of the apparatus and the manner of introduction of gases for combustion and fluidization is such that agglomerated ash can be withdrawn from the bottom of the apparatus and gas containing very low dust loading is produced. The gasification reaction is self-sustaining through the burning of a stoichiometric amount of coal with air in the lower part of the apparatus to form the spout within the fluid bed. The method and apparatus are particularly suitable for gasifying coarse coal particles.

US Patent:

49694081, Nov 13, 1990

Filed:

Nov 22, 1989

Appl. No.:

7/440138

Inventors:

David H. Archer - Pittsburgh PA
M. Mushtaq Ahmed - Turtle Creek PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

F23D 100
F23B 700
G01B 1100
G05B 1304

US Classification:

110347

Abstract:

A system for monitoring combustion of coal in a boiler detects coal composition and heating value using a bulk material analyzer and determines an air/fuel mixture so that when the coal is burned oxygen is available throughout the boiler and the wall temperature of the boiler is maintained below the metallurgical limit and the surface temperature below the ash fusion temperature of the coal where slagging is not desired. The temperature and pressure of steam in the boiler, fuel and air flow rates and temperature and oxygen content of the stack gases are supplied to a boiler model. The boiler model predicts how varying the air supply rate affects sensible heat loss. Periodic measurements of unburned carbon in the ash produced by combustion of the coal are correlated with the operation of the boiler at the time that the ash was produced to provide a basis for estimating unburned coal loss. An optimum air/fuel mixture is determined to minimize heat loss for a given steam production rate or to maximize steam production, using the estimate of unburned carbon loss and output from the boiler model, while at all times maintaining sufficient air flow to prevent oxygen depletion and acceptable wall temperatures.

US Patent:

54138787, May 9, 1995

Filed:

Oct 28, 1993

Appl. No.:

8/142563

Inventors:

Mark C. Williams - Morgantown WV
John G. Wimer - Morgantown WV
David H. Archer - Pittsburgh PA

Assignee:

The United States of America as represented by the Department of Energy - Washington DC

International Classification:

H01M 804
H01M 814
H01M 824

US Classification:

429 16

Abstract:

An improved electrochemically active system and method including a plurality of electrochemical devices, such as fuel cells and fluid separation devices, in which the anode and cathode process-fluid flow chambers are connected in fluid-flow arrangements so that the operating parameters of each of said plurality of electrochemical devices which are dependent upon process-fluid parameters may be individually controlled to provide improved operating efficiency. The improvements in operation include improved power efficiency and improved fuel utilization in fuel cell power generating systems and reduced power consumption in fluid separation devices and the like through interstage process fluid parameter control for series networked electrochemical devices. The improved networking method includes recycling of various process flows to enhance the overall control scheme.