Solar curing and drying structure and method of utilizing solar energy associated with available solar radiation in curing and drying various materials

• US 4,069,593 A
• Filed: 06/07/1976
• Issued: 01/24/1978
• Est. Priority Date: 06/07/1976
• Status: Expired due to Term

• Current Assignee: Barney K. Huang
• Original Assignee: Barney K. Huang
• Inventors: Huang, Barney K.
• Primary Examiner(s): Sprague, Kenneth W.
• Assistant Examiner(s): Yeung, James C.
• Application Number:
  US05/693,378
• Time in Patent Office: 596 Days
• Field of Search: 34/93, 34/131, 34/210, 34/218, 34/219, 34/233, 98/31, 98/32, 126/270, 126/271, 126/400, 237/1 A, 47/17, 47/59
• US Class Current: 34/93
• CPC Class Codes: F26B 3/286 by solar radiation
• CPC Class Codes: Y02B 40/18 using renewables, e.g. solar cooking stoves, furnaces or solar heating

Abstract

The present invention relates to a greenhouse curing and drying structure adapted to collect energy associated with available solar radiation and to utilize the heat associated therewith in curing and drying material within said greenhouse curing and drying structure. Basically the curing and drying structure comprises an outer transparent housing and an interiorly disposed solar energy collector housing defining a drying area or chamber thereunder. During phases of curing and drying material in the drying area or drying chamber, an outside air system is directed between said outer transparent housing and said collector housing where solar energy in the form of heat collected is transferred to the passing air system. The solar heated air system may, depending on the temperature conditions within the drying structure relative to the desired drying schedule, be directed to an air intake of a furnace system associated with said curing and drying structure or routed through an energy storage facility where the energy associated therewith may be stored for subsequent use.

Claims

1. A solar curing and drying structure adapted to utilize solar energy associated with available solar radiation transmitted into the structure for curing and drying material disposed within said structure, said solar curing and drying structure comprising:

A. an outer structural housing including a substantial area of transparent material for transmitting available solar radiation and the energy associated therewith into said structure;

B. collector means disposed interiorly of said outer structural housing for absorbing solar energy transmitted through said transparent material of said outer structural housing;

C. said collector means defining a drying area inwardly thereof and an open area between said collector means and said outer structural housing;

D. a forced air furnace system associated with said structure for forcing air through said material being cured and dried within said drying area, said forced air furnace system including an air intake area and heating means associated therewith for heating air passing through said furnace system as necessary to maintain an appropriate temperature level within said curing and drying structure;

E. opening means formed within said outer structural housing adjacent the open area between said collector means and said outer housing structure; and

F. means for directing a system of air from outside of said curing and drying structure through said opening means and through a substantial area between said outer structural housing and said collector means where heat associated with collected solar energy may be transferred to said air passing therethrough, said means for directing said system of air further including means for routing said system of air from said open area defined between said collector means and said outer structural housing to the vicinity of said furnace system where said system of air or portions thereof may enter the intake area of said furnace system and be utilized in curing and drying the material within said curing and drying structure.

2. The solar curing and drying structure of claim 1 wherein said means for directing a system of air through said open area between said outer structural housing and said collector means and to the vicinity of said furnace system includes an elongated air transfer duct extending at least substantially the entire length of said drying area and including first opening means formed therein for permitting air to pass from said open area between said outer structural housing and said collector means into said duct, said duct further including an exiting opening means for allowing air passing therethrough to be directed to the vicinity of said forced air furnace system where the air exiting from said duct may enter the intake area of said furnace system.

3. The solar curing and drying structure of claim 2 wherein said duct further includes second opening means formed therein adjacent said drying area and operative when opened to allow air to pass between said drying area and said duct thereby providing for the movement of air through said material being dried in said drying area, through said second opening means within said duct and on through said first opening means to where the air may pass into the open area between said outer structural housing and said collector means, whereby the selective routing of air during drying from said drying area through said duct, and into said open area between said outer structural housing and said collector means during nighttime periods of drying results in a generally dehydration effect in that relatively warm air from said drying area engages the relatively cool inner surface of said outer structural housing causing moisture in the air to condense therefrom.

4. The solar curing and drying structure of claim 1 further including energy storage means for storing quantities of solar energy received during daytime curing and drying periods such that excess quantities of solar energy captured during the daytime curing and drying periods can be stored and utilized at night or other curing and drying periods.

5. The solar curing and drying structure of claim 4 wherein said energy storage means includes, side storage facility means associated with said curing and drying structure;

energy storage material disposed within said side storage facility means for collecting heat associated with air passing therethrough and storing the same;

air conduit means disposed within said side storage facility means and embedded within said energy storage material for receiving air transferred through said energy storage material and channeling the same therethrough where the exiting air may be directed in an appropriate fashion into the drying area of said curing and drying structure; and

fan means operative to pull outside air into said air transfer duct through an outside inlet opening formed therein, on through said open area between said outer structural housing and said collector means where energy in the form of heat may be transferred to the air passing therethrough, and on through said energy storage material and said air conduit means where the exiting air can then be directed into said drying area of said curing and drying structure.

6. The solar curing and drying structure of claim 5 wherein said fan means is operative to work both independently of and in conjunction with said furnace system to provide in efficient flow of air through said curing and drying structure.

7. The solar cutting and drying structure of claim 1 wherein said outer structural housing includes a generally quonset shaped outer fiberglass wall structure disposed outwardly of said collector means;

and wherein said means for directing a system of air from outside of said curing and drying structure through said open area between said outer structural housing and said collector means and to the vicinity of said furnace system includes a main air handling duct extending longitudinally between said fiberglass wall structure and said collector means about an upper and generally central location within said curing and drying structure, said main air handling duct including a first set of opening means formed on each side thereof such that when opened air may be readily transferred between said open area between said outer structural housing and said collector means, and wherein said main duct further includes exiting opening means for directing air to said furnace system and to an air intake area associated therewith.

8. The curing and drying structure of claim 7 wherein said first set of opening on each side of said main duct include a series of longitudinally spaced openings, each opening having a closing panel operatively associated therewith and movable between opened and closed positions, and wherein the area of said openings along each side of said main duct progressively increases from the end of said main duct nearest said furnace system towards the opposite end thereof in order to allow for pressure differentials along the duct and to give rise to a generally uniform flow of air over said collector means along at least one side of said curing and drying structure.

9. The curing and drying structure of claim 8 wherein said curing and drying structure includes a furnace room disposed about one end thereof for housing said furnace system;

and wherein said air transfer duct includes an exiting end that extends into said furnace room and includes an exiting opening thereabout for allowing air topass between said main duct and said furnace room.

10. A method of utilizing available solar energy to curing and drying crop material within a curing and drying structure having an outer transparent wall structure, a collector means disposed interiorly of said outer transparent wall structure and defining a drying area interiorly, and a forced air furnace system for heating air and forcing the air through the crop material within the drying area during the curing and drying process, the method of curing and drying said crop material comprising:

A. forcing a main system of air into said drying area and through crop material disposed therein;

B. heating said main system of air as necessary to generally maintain an appropriate temperature leveled within said drying area;

C. directing a second system of air into a solar energy collecting area defined between said transparent outer wall structure and said collector means;

D. moving said second system of air generally over a substantial area of said collector means such that heat resulting from solar energy collected thereby is transferred to said second system of air;

E. directing said second sytem of air into an air transfer means; and

F. routing said second system of air through said air transfer means and combining said second system of air with said main system of air such that heat associated with collected solar energy is utilized to supplement heat furnished by said furnace system of said curing and drying structure to efficiently cure and dry crop material disposed within said curing and drying structure.