Presentation for The Comparison of Different type reflector materials using with Small Solar Thermal Dish Stirling 10 kW Power Plant for Thailand Soft-land and Poor Insolation Nature

1. The Comparison of Different type reflector
materials using with Small Solar Thermal Dish
Stirling 10 kW Power Plant for Thailand Soft
Land and Poor Insolation Nature.
The 12th International Stirling Engine Conferences 2005
Durham University, School of Engineering
United Kingdom
September 7 – 9, 2005
Eng’r Suravut, SNIDVONGS
Naraesuan University, Phitsanulok, Thailand.
ASIAN RENEWABLE ENERGY DEVELOPMENT AND PROMOTION FOUNDATION
AREF ISEC

2. Research By: Eng’r Suravut, SNIDVONGS, EIT
Supervisor: Dr. Sirinuch, CHINDARUKSA
Co Supervisors: Dr. Chavalit, THISAYAKORN, IEEE, EIT
Dr. Wattanapong, RAKWICHIAN
Dr. Vichit, YAMBOONRUNG, PTT
Dr. Mathanee, SANGUANSERMSRI
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3. ASIAN RENEWABLE ENERGY DEVELOPMENT
AND PROMOTION FOUNDATION
AREF
Objectives
1. Promote renewable energy to people by set up exhibition, training,
explaining.
2. Support researchers, students, poor people for educations, experiments,
researchers and developments.
3. Not involved with politics.
4. Corporate with foundations inside and outside Thailand.
211/2 V.S.S Bldg, Ratchadaphisek Rd., Din-Daeng, Bangkok, 10310, Thailand email airscan@turbo.cscoms.com
Din- Daeng,
Tel 662 276 7908-9 Fax 662 276 7913
7908-
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4. Contents
1. Introduction
2. Material Characteristics
3. Reflectance Value
4. Reflector Product Pictures
5. Solar Dish Pictures
6. Summary
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5. Introduction
This paper is one part of the dissertation development research project on the
Solar Thermal Dish Stirling system for a 10 kW power plant with lead acid battery
storage, named “Siam Solar Dish I” research project.
The purpose of this research project activities is to select reflectors which are
suitable for Concentrating Solar Power in Thailand.
The good solar reflectors must have the following characteristics.
1. Light weight
2. Durable for wind, moisture, deflection, high and low temperature.
3. Low construction cost, less than 500 B/m2 or 12.5 $/m2 (1 US $ = 40 Baht
March, 2005).
4. Low reflector cost, less than 20 B/m2 or 0.5 $/m2 (1 US $ = 40 Baht March,
2005).
5. Flexible.
6. Low reflection loss.
7. Reflect more than 90 % in wavelength 700 to 1000 nm.
8. Easy to clean.
9. High impact not easy to break.
10. Life more than 30 years.
11. Ultra violet resists.
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6. Table 1. Characteristics of Solar Reflector
Materials 1/4
Product Name Manufacture Materials Work Temp UV Corrosiv Conductivity Adhesive
C Resist e
VM2000 3M Polymeric Film, Non 125 Non Non Non 3M #M467MF
Metal Yes +
$ 0.3
SA-85 3M Aluminum, Acrylic Yes Yes Non 3M #M467MF
ECP-305 3M Silver, Aluminum Acrylic 125 Non Non Yes 3M #M467MF
Acrylic Mirror Silver, Acrylic Non Non Non
MIRO-SUN Alanod Aluminum, Acrylic Non Yes Yes
Reflect Tech Anod Aluminum, Acrylic Non Yes Yes
Reynolds Alcan Aluminum 500 Non Yes Yes
Astro Aluminum 85 Non Yes Yes
Clear Dome Metalized Products Aluminum, Polyethylene 100 Yes Non Non 3M Contact Cement
Heat Shield I Metalized Products Aluminum, Polyethylene 100 Yes Non Non 3M Contact Cement
Heat Shield II Metalized Products Aluminum, Polyethylene 100 Yes Non Non 3M Contact Cement
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7. Table 1. Characteristics of Solar Reflector
Materials 2/4
Product Name Manufacture Materials Work UV Corrosive Conductivit Adhesive
Temp Resist y
C
Plexiglas Plexiglas with Mirror Non Non Non
Mirro Flex Thermoplastic, Silver, Gold, Brass, Non Non Non
etc.
Mylar Aluminum Mylar Non Yes Yes Epoxy
Spin Off Metallized Aluminum Polyethylene Non Non Non
Products
IBAD Polymer, Copper, Silvered, Alumina Yes Yes Non
Kraft Paper Ra Bar Products Aluminum Non Non Non 3M Spray
Inc
Roche John 3m SA-85
Mirror Polished Stainless Yes Non Yes
Polished
Stainless
CERMET Sun Select Ceramic Metallic Coating Layer Yes Yes Yes
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8. Table 1. Characteristics of Solar Reflector
Materials 3/4
Product Name Reflective Emissive Range Drop Off Cost/ft2 Available
% % nm $
VM2000 98 2 Visible Light 700 1.25 Developed & Testing
SA-85 98 2 Visible Light 2.40 No longer available
ECP-305 97 3 Visible Light Light Fixture
Acrylic Mirror 95 5 Visible Light 5.00 Miro-Sun
MIRO-SUN 95 5 Visible Light 700 2.15 Available
Reflect Tech 92 8 Visible Light 700 1.50 Development
Reynolds 86 14 Visible Light 0.05 Solar Cook, Foods
Astro Foil 97 3 Visible Light 0.80 Insulator Material
Clear Dome 97 3 Visible Light 1.00 Solar Oven
Heat Shield I 97 3 Visible Light 0.85 Solar Oven, Heat Shield
Heat Shield II 97 3 Visible Light 0.75 Solar Oven, Heat Shield
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9. Table 1. Characteristics of Solar Reflector
Materials 4/4
Product Name Reflective Emissive Range Drop Off Cost/ft2 Available
% % nm $
Plexiglas 90 10 Visible Light 5.00 Mirror
Mirro Flex 80 20 Visible Light 5.00 Decorative
Mylar 97 3 Visible Light 3.00 Not available
Spin Off 97 3 Visible Light NASA
IBAD 97 3 Visible Light NREL
Kraft Paper 90 10 Visible Light 0.04 Solar Cook, Heat Shield, Paper Backing
Roche John 98 2 Visible Light Solar cook
Mirror Polished Stainless 50 50 Visible Light 2.00 Decorative
CERMET 95 5 Visible Light 700 2.15 Solar Tech, MIRO-SUN, Alanod
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10. Table 2. Solar Weighted hemispherical reflectance
Rs value of selected weathered samples
Material Manufacture/ Supplier Rs (t=0) % Rs (t=0.5y) %
Glass/ Silver 4 mm Falbeg (D) 93.8 93.8
Glass/ Silver 1 mm Steinmuller (D) 94.0 93.5
Glass/ Silver 1 mm Glaverbel (B)/ Hirtz(F) 94.6 94.6
Miro 2 – 95 Alanod (D) 88.6 85.4
Miro 3 – 95 Alanod (D) 91.1
Anod Aluminium Solar Direct (D) 86.8 84.8
1000.90 Anofol (E)/ Metalloxid (D) 89.8 83.0
ECP305+/ Aluminium 3M (US) 95.6 95.7
ECP305+/ Glass 3M (US) 96.1 95.8
Sunflex (Polymer/ Aluminium) HTC Solar (D) 86.9 < 80.0
SA 85/Glass 3M (US) 88.1 88.1
SA 85/Steel 3M (US) 88.2 88.1
(Outdoor exposure Koln)
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11. Table 3. Solar Weighted hemispherical reflectance
Rs values of selected samples after accelerated
weathering in OUV weather simulation
Material Rs (t=0) % Rs (t=2000 h QUV) % Rs (t=4000 h QUV) %
Glass/Silver 1 mm 94.6 94.7 94.5
Miro 2 – 95 88.6 88.1 88.2
ECP305+/ Glass 96.1 95.4 94.8
Sunflex (Polymer/Aluminium) 86.9 < 50.0 * -
Sol-Gel coated Silver 95.5 94.0 * -
Sol-Gel coated Aluminium 91.0 - -
* reflective aluminium film totally removed
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12. Reflector Product Pictures
Alanod and Miro Sun Alcan Aluminium Solar Flex and Clear Dome
Polycarbonate Mirror 3M VM2000 Reynolds Aluminum
Acrylic Mirror
Polyethylene Mirror
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13. Astro Foil
Material Emittance Reflectance
Concrete 0.90 0.10
Rusty Steel 0.80 0.20
White Paper 0.94 0.06
Wood 0.90 0.10
Aluminum Foil 0.03 0.97
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14. Solar Dish Drawing
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15. Solar Dish Drawing
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16. Solar Dish at Naraesuan University, Phitsanulok, Thailand
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17. Solar Dish at Naraesuan University, Phitsanulok, Thailand
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18. Solar Dish at Naraesuan University, Phitsanulok, Thailand
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19. Solar Dish at Naraesuan University, Phitsanulok, Thailand
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20. Summary
1. The purpose of this research is to select reflectors which are suitable for
Thailand of Energy Concentrating Solar Power Program.
2. The goals are specula reflectance above 90 % for at least 10 years
under outdoor service conditions and a large volume manufacturing cost
of solar reflector structure less than 500 B/m2 (12.5 $/m2 )or reflector
material only less than 20 B/m2 ($ 0.75 /m2).
3. The best candidate materials for Thailand such as MIRO-SUN should fit
for Thailand environment and conditions.
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21. Questions / Answers
Thank You
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