Consolidated Natural Gas Service Company, Inc.

Cryo Fuel Systems, Inc

Raymond R Tison

Paul F Swenson

John A Barclay

Thomas C Brook

Robert J Sprafka

Michael A Barclay

Ross F Nigro

An apparatus for separating CO.sub.2 from a mixture of gases includes CO.sub.2 and a second gas, the apparatus includes an active heat exchanger and a regenerating heat exchanger. The active heat exchanger includes a heat exchange surface in contact with the mixture of gases. The mixture of gases is present in the active heat exchanger at a predetermined pressure which is chosen such that CO.sub.2 freezes on the heat exchange surface when the surface is cooled by a refrigerant having a temperature below that at which CO.sub.2 freezes at the predetermined pressure. The regenerating heat exchanger includes a heat exchange surface in contact with the refrigerant and also in contact with a layer of frozen CO.sub.2. The refrigerant enters the regenerating heat exchanger at a temperature above that at which the CO.sub.2 in the frozen layer of CO.sub.2 sublimates. The sublimation of the solid CO.sub.2 cools the refrigerant prior to the refrigerant being expanded through an expansion valve, which reduces the temperature of the refrigerant to a point below the freezing point of CO.sub.2 at the predetermined pressure. The refrigerant is re-compressed by a compressor after leaving the active heat exchanger. In the preferred embodiment of the present invention, the gaseous CO.sub.2 released by the regenerating heat exchanger is used to precool the incoming gas mixture. A second precooling heat exchanger precools the compressed refrigerant by providing thermal contact with the refrigerant leaving the active heat exchanger.

Apparatus and method for purifying natural gas via cryogenic separation

A controller and method for controlling two or more electrical generators to meet the applied load, varies the activation/deactivation sequence of the generators according to and instruction set selected by time or day or other discrete event. The controller and method also control discretionary loads via a request to run process which allows the generation system to be readied for the additional load.

Multi-engine controller

A method and apparatus for fast filling a vehicle fuel tank with high pressure natural gas comprising the steps of coupling a fill line to the vehicle tank, introducing high pressure natural gas into the line and the tank, measuring the pressure in the line in a manner that yields a measurement of the initial pressure of the gas in the tank, assigning an initial temperature for the gas in the tank, predetermining the final desired pressure and temperature of the gas in the tank at the end of the fill, calculating the mass or temperature of the gas to be added to the tank so that the adiabatic compression and potential rise in temperature of gas in the tank is automatically compensated for and the tank is substantially filled with a mass that results in a condition, when the tank and the gas contained therein substantially reach ambient temperature, wherein the pressure in the tank is substantially equal to the nominal rated pressure of the tank and, thereafter filling the tank with the calculated gas mass or temperature.

Quick fill fuel charge process

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Mentor, OH, United States of America

Raymond R Tison