Solar power generation and energy storage system

• US 6,223,743 B1
• Filed: 09/15/1999
• Issued: 05/01/2001
• Est. Priority Date: 05/18/1999
• Status: Expired due to Fees

• Current Assignee: Melvin L. Prueitt
• Original Assignee: Melvin L. Prueitt
• Inventors: Prueitt, Melvin L.
• Primary Examiner(s): Lazarus, Ira S.
• Assistant Examiner(s): CLARKE, SARA SACHIE
• Application Number:
  US09/396,653
• Time in Patent Office: 594 Days
• Field of Search: 126/620, 126/624, 126/626, 126/565, 126/566, 126/569, 126/651, 126/655, 126/908
• US Class Current: 126/620
• CPC Class Codes: F03G 6/00 Devices for producing mechanical power from solar energy solar boilers F24
• CPC Class Codes: F03G 6/06 with solar energy concentrating means
• CPC Class Codes: F24S 10/501 having conduits of plastic material
• CPC Class Codes: F24S 20/55 made of flexible materials
• CPC Class Codes: F24S 60/30 storing heat in liquids
• CPC Class Codes: F24S 80/525 made of plastics
• CPC Class Codes: Y02E 10/44 Heat exchange systems
• CPC Class Codes: Y02E 10/46 Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
• CPC Class Codes: Y02P 90/50 Energy storage in industry with an added climate change mitigation effect

Abstract

A solar energy collection system harvests solar energy from large open areas. A length of flexible solar collector is provided for unrolling along a supporting surface. A first layer of the solar collector is an uninsulated base panel for directly contacting the ground or other supporting structure. A plurality of parallel conduits are sealed along the length of the flexible base panel and have a high light absorption and a low infrared emission for containing a flowing liquid to be heated by solar energy from the sun. A length of a covering material is placed parallel to the base panel and between the parallel conduits and the sun and sealed to the base panel for containing a low pressure fluid to reduce heat loss from the flowing liquid and to inflate the structure formed by the ground cover and covering material. Heated fluid from the parallel conduits is collected in a header for delivery to a power generating system. The heated liquid is passed through a boiler for boiling a fluid with a low boiling point, such as a refrigerant, and the vapor can then be used in a conventional power plant for generating output energy. In one embodiment, the power plant condenser is cooled by the evaporation of water sprayed into cooling air adjacent the condenser.

Claims

1. A solar energy collector system comprising:

a length of flexible uninsulated base layer for unrolling along a supporting surface to form a plurality of adjacent solar collectors;

a plurality of parallel channels sealed along the length of the flexible base layer and having a coefficient of light absorption for heating by solar energy a flowing liquid contained within the parallel channels and an infrared light emission coefficient effective to retain heat within the flowing liquid where heat is transmitted through the uninsulated base layer to the supporting surface for storage; and

an outer layer between the parallel channels and the sun and sealed to the base layer for transmitting light to the parallel channels and containing a fluid to reduce heat loss from the flowing liquid and to inflate the structure formed by the base layer and outer layer.

2. A solar energy collection system according to claim 1 further including side surfaces along outer ones of the plurality of the parallel channels for sealing between abutting side surfaces of adjacent solar collectors.

3. A solar energy collection system according to claim 1 further including anchoring flaps extending from edge portions of the base layer to anchor the plurality of solar collectors.

4. A solar energy collection system according to claim 1, further including a plurality of cover layers, each cover layer covering one parallel channel and defining a space between the parallel channel and the cover layer for flowing additional liquid for heating or an insulating fluid for retarding transmission of heat from the liquid in the parallel channel.

5. A solar energy collection system according to claim 1, further including an intermediate layer between the parallel channels and the outer layer and connected to the outer layer and the side surfaces to form an intermediate insulating volume between the plurality of parallel channels and the outer layer.

6. A solar energy collection system according to claim 5, further including a plurality of cover layers, each cover layer covering one parallel channel and defining a space between the parallel channel and the cover layer for flowing additional liquid for heating or an insulating fluid for retarding transmission of heat from the liquid in the parallel channel.