Apparatus and method for multiplying the output of a generating unit

• US 4,441,028 A
• Filed: 06/16/1977
• Issued: 04/03/1984
• Est. Priority Date: 06/16/1977
• Status: Expired due to Term

• Current Assignee: Robert M. Lundberg
• Original Assignee: Robert M. Lundberg
• Inventors: Lundberg, Robert M.
• Primary Examiner(s): Rubinson, G. Z.
• Assistant Examiner(s): Duncanson, Jr., W. E.
• Application Number:
  US05/807,241
• Time in Patent Office: 2,483 Days
• Field of Search: 60/652, 60/655, 60/659, 60/398, 60/39.18 B, 290/52
• US Class Current: 290/52
• CPC Class Codes: F02C 6/16 for storing compressed air
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
• CPC Class Codes: Y02E 60/16 Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

A power generating apparatus and method of operation for meeting a variable demand includes a compressor for supplying gas to a heat engine which generates power, and a reservoir positioned intermediate the compressor and heat engine. A portion of the power produced by the heat engine, which may be operated at an average rate of demand, is utilized to compress gas which is directed to the reservoir. The compressed reservoir of gas is selectively directed to the heat engine to increase the generation of power to satisfy increased rates of demand.

Claims

1. In a power generating apparatus having first and second heat engine means and a compressor directly and mechanically connected to the first heat engine means, the method of generating power in accordance with a variable demand, including the steps of:

establishing a storage reservoir of compressed gas by the continuous operation of said first heat engine means driving the compressor;

operating the first heat engine means continuously at a constant work output and at a constant heat and gas flow input rate, said work output substantially conforming to the average rate of demand of said second heat engine means to generate power,

withdrawing intermittently said stored portion of said compressed gas in said reservoir to a second heat engine means to increase the generation of power as required to satisfy such a variable demand while maintaining said first heat engine means at a constant work output, and

generating power by a power receiving means driven by said second heat engine means, said power receiving means adapted to accept up to the full load output of said second heat engine means, with said second heat engine means withdrawing intermittently said stored portion of said compressed gas from said storage reservoir.

2. The method of generating power in accordance with claim 1 wherein in the step of operating said first heat engine means continuously at a constant work output substantially conforming to the average rate of demand, said average rate of demand of said work output of said first heat engine means is calculated over a period of time of at least one week and withdrawing of said stored portion of said compressed gas from said storage reservoir to said second heat engine means shall constitute a portion of said period of time.

3. The method of generating power in accordance with claim 2 wherein said portion of said period of time is at least a fraction of one day of at least one week.

4. The method of generating power in accordance with claim 2 wherein the size of said second heat engine means utilizes all the gas stored during said period of time of at least one week during the portion of said period of at least one day of at least one week.

5. The method of generating power in accordance with claim 1 further including the step of heating the compressed gas upon withdrawal from the storage reservoir of said stored portion of said compressed gas.

6. The method of generating power in accordance with claim 1 wherein said heat engine means and said second heat engine means are each of a predetermined size which provide rotational output to said compressor and to said power receiving means respectively, and selected from a group comprising coal fired steam-turbine cycles, nuclear fired-turbine cycles, gas turbine and combined cycles.

7. The method of generating power in accordance with claim 1 wherein said compressed gas is air.

8. A power generating apparatus operable with variable power output including in combination,

a storage reservoir of compressed gas,

at least one compressor mechanically coupled to and driven by a first heat engine means whereby said at least one compressor and said first heat engine means operate continuously at constant work output and at a constant heat and gas flow input rate to deliver at least a portion of the compressed gas to said storage reservoir over a period of time of at least one week to establish a stored portion of said compressed gas in said storage reservoir,

at least one second heat engine means adapted to maximize its power output for a portion of said period of time of at least one week, whereby said second heat engine means receives at least a portion of its energy from said stored portion of said compressed gas withdrawn from said storage reservoir during said portion of time of at least one week, and

at least one power receiving means driven by said second heat engine means, said power receiving means being adapted to maximize the power output of said second heat engine means.

9. The power generating apparatus in accordance with claim 8 wherein said portion of said period of time of at least one week is at least a fraction of one day of said at least one week.