SOLAR DEHYDRATOR PLANS

Transcription

1 PLANS by: Timothy J. Bowser, Ph.D, P.E. Professor, Food Engineering Biosystems & Ag. Engineering Dept. Oklahoma State University Stillwater, OK 7078 Built and tested in classrooms in rural Nicaragua, 06 Copyright. Tim Bowser. 07. May be used for educational purposes without written permission, but with a citation to this source. COVER Based on a design by: D. Scanlin, Mother Earth News. 0. Available at: /6/07 OF 7

2 TRAY WITH FOAM STRIP ASSEMBLY BENDING LATH INSULATED COLLECTOR PAINTING LATH FINISHED DEHYDRATOR WITH DECORATIVE LID/VENT Images were taken by the author at three construction locations in Nicaragua, June 06. ADDING PLASTIC CONSTRUCTION IMAGES INSTALLING LATH /6/07 OF 7

3 WOOD MATERIALS ITEM QTY. 7 X X 60 cm board (9 x 89 x 600 mm) trays & collector X 8 X 80 cm board (9 x 8 x 800 mm) for base COLLECTOR TROUGH COLLECTOR TROUGH ALTERNATIVE A: TWO PLYWOOD SHEET CUT PLAN X 8 X 60 cm board (9 x 8 x 600 mm) for base x 8 x. m board (9 x 8 x,0 mm), collector X X board (8 x 89 x mm) base legs LID COVER 6.mm x x 8 plywood sheet (6. mm x x cm) 6 x x 7 cm board (8 x 89 x 70 mm) for base 7 x x board (8 x 89 x mm) collector legs 8 6. mm x 60 x 6 cm plywood board for base 9 6. mm x 60 x 0 cm plywood board for collector 0 6. mm x 6 x 60 cm plywood board for fixed lid 6. mm x x 8 cm plywood board for sliding lid cover FIXED LID BASE ALTERNATIVE B: SINGLE PLYWOOD SHEET CUT PLAN OTHER MATERIALS ITEM QTY. COLLECTOR TROUGH PART C, 60 x 0 cm COLLECTOR TROUGH PART D, 60 x 0 cm Mesh screen (cut to size, approximately 60 x 6 cm) for trays Mesh to cover air intake (approx x 60 cm) for collector Mesh screen (cut to size, approximately 0 x 0 cm) for lid COLLECTOR TROUGH PART B, 60 x 0 cm LID COVER 960 cm Foam strip (cut to size), self-adhesive or other, for trays Duct tape or other material to seal joints in base 6 8 x cm metal lath or screen, painted black 7 Roll Reflective insulation, approx. x. m, trim to fit collector U.V. stable 6-mil plastic sheet (approx. 0.6 x. m), collector Nails, 6 d or similar for trays, base and other, about ½ lb. Nails, d or similar for plywood, about ¼ lb. COLLECTOR TROUGH PART A, 60 x 0 cm FIXED LID BASE 0 Nails, roofing or similar with wide head, for lid Staples tacks or brads to fasten mesh screen & foam Metal lath or screen 8 x cm, painted black NOTE: COLLECTOR TROUGH BASE CUT IN FOUR SEPARATE PIECES (A TO D SHOWN) AND ASSEMBLED TO 60 X 0 mm The cut & supplies sheet lists suggested materials needed for the project. Substitutions are encouraged based on cost, availability and imagination. /6/07 CUT & SUPPLIES SHEET : 0 OF 7

4 MATERIALS ITEM QTY. 6 X X 60 cm board (9 x 89 x 600 mm) Nails, 6d or similar 960 cm Mesh screen (cut to size, approximately 60 x 6 cm) Foam strip (cut to size), self-adhesive or other Staples tacks or brads to fasten mesh screen & foam SIDE VIEW mesh not shown Fasten foam strip to boards around top edge. Foam seals leaks between dryer trays when stacked. Stretch mesh screen snugly across boards, fasten with staples or similar. Mesh supports food in tray. Note: fold mesh double under fasteners for more secure attachment. PLAN VIEW Dehydrator trays are stacked on the base and hold product during the dehydration process. /6/07 : 0 DRYER TRAY OF 7

5 Extend legs 0. m above base horizontal board to help retain dryer trays. Cut two, approx. 0 x 0 cm holes to permit air from solar collector to enter the dehydrator base. 0. Four dryer trays shown for clarification Nail plywood board to bottom of base (nails not shown). Cut length of x support boards (legs) to suit application. Note: Legs must be long enough to accommodate slope of solar collector SIDE VIEWS MATERIALS ITEM QTY. X 8 X 80 cm board (9 x 8 x 800 mm) X 8 X 60 cm board (9 x 8 x 600 mm) X X cm board (8 x 89 x mm) 6. mm x 60 x 6 cm plywood board Nails, d or similar 6 Duct tape or other sealant for joints Use duct tape, caulk or similar to make seams and joints of dehydrator base air-tight Dehydrator base supports trays and solar collector. PLAN VIEW /6/07 DEHYDRATOR BASE : 0 OF 7

6 MATERIALS Attach solar collector to the side of the Base with holes for air circulation. ITEM QTY. x 8 x. m board (9 x 8 x,0 mm) x x 7 cm board (8 x 89 x 70 mm) x 8 x. m board trimmed on both ends to the approximate angle that faces the collector perpendicular to the sun (angle depends on location and season(s) of intended use, 77º shown). x x board (8 x 89 x mm) 6. mm x 60 x 0 cm plywood board Metal lath or screen 8 x cm, painted black 6 Roll Reflective insulation, approximately x. m 7 Nails, 6d and d or similar mm plywood floor attached with nails (nails not shown) Staples or similar fasteners for plastic sheeting U.V. stable 6 mil plastic sheeting (approx 0.6 x. m) Mesh to cover air intake (approx x 60 cm) SIDE VIEW Cover open end with mesh scrap.. Fold down ends about cm to fit into body of collector (see section A-A). Line body of collector with reflective insulation attached with staples. Note: metal lath, plastic and insulation not shown on side and plan views 0.0 SOLAR ABSORBER: METAL LATH OR SCREEN PAINTED BLACK A COLLECTOR BODY x x 60 cm support Staple plastic over collector body. Metal lath, stacked to permit air flow. A x x 70 mm board for attachment to body PLAN VIEW x x support legs, cut to length. SECTION A-A Solar collector warms air with sunlight and transfers warm air to dehydrator. /6/07 SOLAR COLLECTOR : 0 6 OF 7

7 MATERIALS ITEM QTY. 6. mm x 6 x 60 cm plywood board 6. mm x x 8 cm plywood board Mesh screen (cut to size, approximately 0 x 0 cm) 0 Roofing nails, or similar, to retain sliding cover Staples or similar fastener for mesh screen DIRECTION OF MOVEMENT OF SLIDING COVER FIXED LID WITH VENTS SLIDING VENT COVER Set vent opening size using a thermometer to measure air temperature. Typical air temperatures do not exceed 7 ºC. PLAN VIEWS SLIDING COVER ROOFING NAILS HOLD SLIDING COVER IN PLACE FIXED LID ASSEMBLD END VIEW STAPLE MESH ON BOTTOM OF FIXED LID TO COVER VENTS Lid covers dehydrator and permits control of air flow. NOTE: BOARD THICKNESS NOT TO, MESH NOT SHOWN /6/07 LID WITH VENTS : 0 7 OF 7