General Electric Company

Robert Michael Orenstein

Ronald P Manginell

Nirm Velumylum Nirmalan

Matthew Wallace Moorman

Stephen Adam Solovitz

Subhrajit Dey

William Joseph Antel

Nishant Vats

A method for measuring a lower heating value of a gaseous fuel. The method includes mixing a gaseous fuel with air to provide a combustible air-fuel mixture. The air-fuel mixture is directed to flow across a flow surface of a first micro-hotplate maintained at a constant temperature. A change in power required to maintain a constant temperature of the first micro-hotplate flow surface due to a convective and conductive heat transfer from the first micro-hotplate flow surface to the air-fuel mixture is measured. The air-fuel mixture is directed to flow across a flow surface of a second micro-hotplate maintained at a constant temperature. The air-fuel mixture is combusted as the air-fuel mixture flows across the second micro-hotplate flow surface. A change in power required to maintain a constant temperature of the second micro-hotplate flow surface due to the combustion of the air-fuel mixture is measured.

Method, sensor and system for measuring a lower heating value and a Wobbe Index of a gaseous fuel

An apparatus for measuring blade tip clearance in a gas turbine. The apparatus includes an ultrasonic sensor for measuring a distance between a stator shroud surface and a position of the ultrasonic sensor and providing a first signal indicative thereof; a radio frequency sensor for measuring a distance between rotating blade tips of the gas turbine and a position of the radio frequency sensor and providing a second signal indicative thereof; and a processor for receiving and processing the first and second signals to determine blade tip clearance of the gas turbine. The apparatus may also be used to measure blade tip clearances in a steam turbine, or a compressor.

Method and apparatus for measuring turbine blade tip clearance

Growing community of inventors

Atlanta, GA, United States of America

Robert Michael Orenstein