solar energy collection
DESCRIPTION
Solar Energy Collection. MSD 8404 01/11/08. Solar Collector Concepts. “Flat Plate” Collectors First Gen Type Various Serpentine Patterns Coiled Tube Evacuated Tube Collector Parabolic Mirror and Pipe. Flat Plate Collectors. Evacuated Tube Collectors. Parabolic Mirror Collection. - PowerPoint PPT PresentationTRANSCRIPT
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Solar Energy CollectionMSD 8404 01/11/08
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Solar Pasteurizer
Solar Energy
Water
Collect Solar Energy
Convert to Heat
Transfer Heat to Water
Store Input Water
Receive Heat
PasteurizeHeat Back
into System
Output Pasteurized
Water
Functional Diagram for P0804 Solar Pasteurizer
Identified Sub-Systems
Pasteurize
Heat Back into System
Collect Solar Energy
Store Input Water
Convert to Heat
Flow Control
Heat Transfer
Transfer Heat to Water
Receive Heat
Solar Collector
Heat Recovery
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Solar Collector Concepts
• “Flat Plate” Collectors– First Gen Type– Various Serpentine Patterns– Coiled Tube
• Evacuated Tube Collector• Parabolic Mirror and Pipe
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Flat Plate Collectors
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Evacuated Tube Collectors
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Parabolic Mirror Collection
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Collector Concept Selection Matrix
Collector ConceptsA B C D
(reference)
Segment First Gen Serpentine Flat Plate Black Coil Evac Tube
Selection Criteria Weight Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd
Thermal Efficiency 30% 3 - 0.90 4 - 1.20 2 - 0.60 5 - 1.50
Material Cost 50% 3 - 1.50 3 - 1.50 5 - 2.50 2 - 1.00
Safety 10% 5 - 0.50 5 - 0.50 5 - 0.50 3 - 0.30
Maintenance 10% 4 - 0.40 3 - 0.30 4 - 0.40 5 - 0.50
Total Score 2.90 3.20 3.60 2.80
Rank 4 2 1 3
Continue? Yes Yes No
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Flow Control
• Automotive Thermostat (First Gen)– Residential radiator thermostatic valves too expensive
• Multiple Thermostats• Manual Valve• Electronic on/off• Density• Thermal Orifice• Bimetallic strip
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Flow Control Concept Selection Matrix
A B C
(Previous Design
Automotive Thermostat Multiple Thermostats Manual valve
Selection Criteria Weight Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd
Reliability 35% 1 - 0.35 3 - 1.05 3 (If operated correctly) 1.05
Ease Of Use 15% 5 No Interface 0.75 5 No Interface 0.75 1 Constant Attention 0.15
Cost 25% 5 - 1.25 4 - 1.00 5 - 1.25
Safety 5% 5 - 0.25 5 - 0.25 3 - 0.15
Maintenance 15% 4 - 0.60 4 - 0.60 5 - 0.75
Warm-Up Delay 5% 2 - 0.10 2 - 0.10 3 - 0.15Total Score 3.30 3.75 3.50
Rank 5 3 4Continue? Yes No
D E F G
Electronic on/off Density Thermal Orifice Bimetallic strip
Selection Criteria Weight Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd
Reliability 35% 5 - 1.75 4 - 1.40 4 Needs pre-filter 1.40 4 - 1.40
Ease Of Use 15% 5 No Interface 0.75 5 No Interface 0.75 5 No Interface 0.75 5 - 0.75
Cost 25% 1 Must be Overcom 0.25 3 - 0.75 5 - 1.25 3 - 0.75
Safety 5% 3 - 0.15 5 - 0.25 5 - 0.25 5 - 0.25
Maintenance 15% 5 - 0.75 4 - 0.60 2 - 0.30 1 - 0.15
Warm-Up Delay 5% 4 - 0.20 2 - 0.10 3 - 0.15 4 - 0.20Total Score 3.85 3.85 4.10 3.50
Rank 2 2 1 6Continue? Yes Yes On Research No
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Heat Recovery
• First Gen (flat plate integrated heat exchange)• Coiled tube in tube• Soldered Tube• Straight tube in tube
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Heat Recovery Concept Selection Matrix
Heat Exchanger ConceptsA B C D
(reference)Segment First Gen Coiled tube in tube Soldered Tube Straight tube in tube
Selection Criteria Weight Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd
Thermal Efficiency 30% 3 - 0.90 4 - 1.20 3 - 0.90 4 - 1.20
Material Cost 50% 2 - 1.00 3 - 1.50 4 - 2.00 3 - 1.50
Safety 10% 5 - 0.50 5 - 0.50 5 - 0.50 5 - 0.50
Maintenance 10% 2 - 0.20 4 - 0.40 4 - 0.40 4 - 0.40Total Score 2.40 3.20 3.40 3.20
Rank 4 2 1 3Continue? Yes Yes Yes
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Concepts
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Dual-Valve Convective Loop
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Serpentine w/Pipe within Pipe
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Spiral Black Tube Collector w/ Braided HX
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Flat Plate w/Integrated HX and Dual Valve
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Batch System: Reused Plastic Bottles
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Final Concept SelectionA B C
Selection Criteria Weight Rating Notes Wtd Rating Notes Wtd Rating Notes WtdReliability 20% 2 0.40 2 0.40 2 0.40Ease Of Use 10% 3 0.30 3 0.30 3 0.30Cost 25% 3 0.75 2 0.50 1 0.25Safety 25% 2 0.50 3 0.75 3 0.75Maintenance 15% 2 0.30 4 0.60 3 0.45Warm-Up Delay 5% 2 0.10 3 0.15 4 0.20
Total Score 2.35 2.70 2.35Rank 5 3 4
Continue? Yes No
SPHINX (Previous Design)
Convective loop w/ divorced heat exchanger
parabolic collector tube within a tube
D E F G
Selection Criteria Weight Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd Rating Notes WtdReliability 20% 3 0.60 3 0.60 2 0.40 3 0.60Ease Of Use 10% 3 0.30 3 0.30 4 0.40 1 0.10Cost 25% 2 0.50 2 0.50 4 1.00 1 0.25Safety 25% 3 0.75 3 0.75 3 0.75 4 1.00Maintenance 15% 2 0.30 3 0.45 3 0.45 3 0.45Warm-Up Delay 5% 2 0.10 3 0.15 3 0.15 1 0.05
Total Score 2.55 2.75 3.15 2.45Rank 2 2 1 1
Continue? Yes Yes Yes No
Flat Plate, Dual valve, integrated heat
exchangerSerpentine, Pipe Within
PipeCoiled Tube, Braided
Heat exchanger Batched Bottles