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G SERIES SOLAR COLLECTORS
TECHNICAL SPECIFICATIONS
G Series Solar Collector - Model G32-P
SRCC OG-100 Certified
Certification # 100-2006005A
Directory
-
-
Glazing System
- General Description
- Optical Performance
- Structural Performance
- Thermal Performance
- Fire Behavior
- Durability
-
Absorber System
- General Description
- Optical Performance
- Thermal Performance
- Mechanical Integrity
- Durability
-
Insulation
- General Description
- Thermal Performance
- Fire Behavior
- Durability
-
Collector Assembly
- General Description
- Collector Container
- Moisture Control
- System Sealant and Gaskets
-
Installation
- Handling and Transportation
- Mounting Procedure
- Collector Interconnection
- System Connection
- Start-up Tests
-
Operation
- Method of Operation and Control
- Pressure Drop vs Collector Flow
- Recommended Flow Rate
- Maximum Operating Pressure
- Recommended Operating Pressure
- Maximum Operating Temperature
- Stagnation Temperature
- Recommended Heat Transfer Fluids
-
Maintenance and Warranty
- Cleaning and Maintenance
- Manufacturer Servicing
- Availability of Parts
- Replacement of Parts
- Warranty
-
Durability
- Operating Experience
- Accelerated Aging Tests
-
Collector Efficiency
- General Description
- Test Conditions
- Time Constant
- Efficiency
- Incident Angle Modifier
- FSEC Standard Day Tests
Download G Series Technical Specifications
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A. General Information
1.0 Product Description:
-
Thermo Dynamics G Series flat plate liquid collectors are single
glazed with low-iron tempered glass. The absorber is an arrangement
of parallel riser fins connected to top and bottom headers. The
fins are aluminum with integral copper riser tubes, which are completely
surrounded by the aluminum and are metallurgically bonded together.
The copper riser tubes are soldered to internal manifolds (headers),
which are available in either 3/4" or 1" diameter copper
pipe. The back and sides are insulated with a 25 mm (1") layer
of compressed fiberglass. The collector frame is extruded aluminum
with a baked-enamel finish, (dark brown). Collector mounting is
by way of a sliding bolt-track. Flush and racked collector mounting
formats
are easily accommodated.
1.1 Options
-
Factory installed temperature sensors; 3/4" and 1" headers;
12 mm (1/2") riser tubes; absorber coatings: selective paint
surface.
1.2 Dimensions and Volumes
-
1.20 m x 2.475 m x 0.086 m
-
- (47-3/8 in x 97-3/8 in x 3-3/8 in)
- Gross area: 2.982 m2 (32.10 ft2)
- Aperture area: 2.783 m2 (29.96 ft2)
- Absorber area: 2.870 m2 (30.90 ft2)
- Volume (19 mm (3/4") header): 2.3 liter (0.51 IG) Volume
(25 mm (1") header): 3.0 liter (0.66 IG)
1.3 Weight:
-
Net: 43.5 kg (96 lb)
- Shipping: 64 kg (140 lb)
- (includes wooden crate)
2.0 Product Use
2.1 Product Applications:
-
Residential and commercial domestic hot water, process hot water,
space heating, pool heating
2.2 Geographic and Climatic Limitations:
2.3 Certifications:
-
Listed by Natural Resources Canada
(NRCan) as an accepted solar collector
- 3.0 Manufacturer's Experience
3.1 Background
-
Thermo Dynamics Ltd. (TDL) is a Canadian company engaged in the research,
development, production, distribution and installation of solar thermal
equipment. The company has been involved in the solar thermal industry
since 1981 and operates from its head office and factory in Dartmouth,
Nova Scotia, Canada, the sister city of Halifax situated on the Atlantic
coast. The company's specialization is the glazed liquid-flat-plate
(LFP) collectors with metal absorbers. TDL is a fully integrated
solar thermal company with the ability to convert raw aluminum and
copper
into a high technology solar water heating system.
-
- Thermo Dynamics Ltd., as a world leader in solar technology, manufactures
and markets solar heating equipment from complete systems to basic
selective surface components for O.E.M.'s licensees, dealers and
distributors through out North America, Europe, Africa, New Zealand,
as well as 10 other countries around the world.
3.2 Production:
-
3000 m2 per year for G32 collectors.
3.3 Projects:
-
Mount Saint Vincent Motherhouse, Halifax, Nova Scotia, Canada. Largest
SDHW system in Canada. Collector type and number: 224 - G32 Collector
area: 675 m2 (7,265 ft2) 1.75 GJ/m2 /year (154 MBtus/ft2 /year)
-
Top of the Mountain Apartments, Halifax, Nova Scotia, Canada. Collector
type and number: 49 - G32; 49 - G40 Collector area: 328 m2 (3,531 ft2)
1.78 GJ/m2 /year (156 MBtus/ft2 /year)
-
-
-
-
Somerset Place Apartments, Halifax, Nova Scotia, Canada Collector
type and number: 120 - G32 Collector area: 356 m2 (3,332 ft2) 2.10
GJ/m2 /year (185 MBtus/ft2 /year)
-
-
-
Thermo Dynamics Ltd. has installed thousands of solar residential
domestic hot water and pool heating systems.
-
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B. Glazing System
1.0 General Description:
-
Glazing is a 3.2 mm (1/8") single sheet of low-iron tempered
glass with an EPDM rubber seal around the edges. Glazing is secured
by an aluminum capping fastened by stainless steel screws around
the perimeter.
1.1 Trade Names:
1.2 Chemical Composition:
-
Iron oxide content of 0.03%
1.3 Physical Treatment:
-
All glazing is tempered with swiped edges and has a shallow stipple
pattern to reduce specular reflectance.
1.4 Thickness:
1.5 Spacing:
-
Glazing to absorber: 20 to 25 mm (3/4" to 1")
1.6 Weight:
1.7 Appearance:
-
Translucent; the inner surface is embossed with a stipple pattern
which produces a frosted effect.
2.0 Optical Performance
2.1 Spectral Transmittance:
-
Visible light 89.8% ASTM E424-71A Ultra violet light 51% ISO 9050
Solar light/energy 89.5% ASTM E424-71A
2.2 Energy Transmission:
-
Solar spectrum (0-3 micrometres) 89.5% Infrared spectrum (>3
micrometres) No data available
2.3 Refractive Index:
3.0 Structural Performance
3.1 Tensile Strength:
-
Design Pressure is 2.87 kPa (.416 psi) for 1/8 inch glass with a
design factor of 2.5. Tensile strength is 152 MPa (22,000 psi) with
a 2.5 safety factor.
3.2 Impact Resistance:
-
Glazing can withstand 542 J (400 ft-lb) soft-body impact, 3 to 5
times stronger than annealed glass.
3.3 Uniform Load Resistance:
- Uniform load testing was conducted at the National Solar Test
Facility in January 2007as part of CSA-F378-87.
-
Positive load: 1.5 kPa (0.22 psi)
- Negative load: 1.9 kPa (0.28 psi)
4.0 Thermal Performance
4.1 Coefficient of Thermal Expansion:
-
89.9 x 10-7 1/°C (49.9 x 10-7 1/°F)
4.2 Operating Temperature Range:
-
Min: below -46°C (-51°F); max: 260°C (500°F)
4.3 Thermal Conductivity:
5.0 Fire Behavior:
-
Non-combustible. Does not produce toxic fumes in a fire situation.
6.0 Durability:
-
Glass is chemically inert to most chemical solvents and staining
agents, and is resistant to surface weathering, ultraviolet and thermal
degradation, and moisture damage.
-
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C. Absorber System
1.0 General Description:
-
The absorber consists of eight parallel aluminum fins with integral
copper riser tubes, which are bonded to and completely surrounded
by the aluminum by means of high-pressure cold-rolling process. The
absorber
coating is Anodic-Cobalt selective surface or black paint selective
surface. The riser/header connection has two parts, a short copper
nipple brazed to the header with the absorber fin soldered to the
copper nipple.
1.1 Generic/Trade Names:
-
Absorber fins: "Sunstrip"
- Tubes: copper
- Headers: Type M copper
- Coating: SOLEC
- Solder/Brazing: 95/5 tin antimony/Silfos
1.2 Chemical Composition:
-
Absorber fins: aluminum (AA 1350/0 alloy)
- Tubes: copper (CDA 1220/0 alloy)
- Headers: copper
- Coating: selective black paint paint
- Solder/Brazing: no data available
1.3 Physical Treatment:
1.4 Dimensions:
-
Tube diameter: rhombic shape with an open area of about 120 mm2 (0.19
in2 )
- Tube spacing: 143 mm (5.63")
- Header diameter: 22.2 or 28.6 mm (3/4" or 1") nominal
- Absorber thickness: 0.5 mm (0.02")
- Coating thickness: no data available.
2.0 Optical Performance
2.1 Absorptivity of Solar Radiation:
2.2 Emissivity of Infrared Radiation:
Painted surface: e = 25%
3.0 Thermal Performance
3.1 Thermal Transfer:
-
Good thermal transfer due to the high conductivity of aluminum and
the bond between the aluminum fins and copper tubes.
3.2 Coefficient of Thermal Expansion:
-
Absorber: no data available
- Tubes: no data available
-
- To allow for thermal expansion, the absorber is free to float within
the collector container. EPDM gaskets prevent contact between the
copper headers and the aluminum container.
3.3 Thermal Capacity of Absorber System:
3.4 Operating Temperature Range:
-
Absorber: max. 160°C (320°F)
- Tubes: max. 160°C (320°F)
- Solder/Brazing: min. -50°C (-58°F); max. 160°C (320°F)
- Coating: max. 160°C (320°F)
4.0 Exposure Test:
-
The collector has completed a 30-day outdoor no-flow exposure test at
The National Solar Test Facility (NSTF), Mississauga, Canada, June
2006. The test was in accordance to CAN/CSA F378-87. The test includes
a preconditioning rain penetration test, 30 days exposure with a minimum
of 17 MJ (16 MBtu) of incident energy per square metre of collector
surface area, and a cold fill (thermal shock) test. There was no sign
of degradation or loss in performance.
5.0 Durability:
-
The absorber and the selective surface are not affected by normal
aqueous solutions. Stagnation testing has shown no thermal degradation.
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D. Insulation
1.0 General Description:
-
Collectors are insulated around the sides and back with fiberglass
board. Complies with ASTM-C-612 Classes 1 and 2.
1.1 Trade Names:
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Sides: Fiberglas AF530
- Back: Fiberglas AF530
1.2 Chemical Composition:
-
Fibrous glass bonded by a thermosetting resin. Inorganic, will not
rot.
1.3 Density:
1.4 Thickness:
-
Side: 25 mm (1")
- Back: 25 mm (1")
2.0 Thermal Performance
2.1 Thermal Conductivity:
-
0.036 W/m·°C (0.25 Btu ·in/hr·ft2·°F)
at 24°C (75°F)
2.2 Thermal Resistance:
-
RSI 0.7 °C·m2/W (R 4 °F·ft2·hr/Btu)
at 24°C (75°F)
2.3 Coefficient of Thermal Expansion:
2.4 Operating Temperature Range:
-
Maximum continuous operating temperature is 232°C (450°F).
3.0 Fire Behavior
3.1 Surface Burning Characteristics:
-
Fiberglas AF530 is inherently fire safe. ULC Flame Spread rating
of 15. (compared to untreated Red Oak as 100 - test method ULC S-102)
4.0 Durability:
-
No changes should occur to the insulation when subjected to chemicals
normally encountered in use conditions. No thermal degradation has
been found after prolonged stagnation testing. Moisture adsorption
is less than 0.2% by volume, 96 hours at 49°C (120°F) and
95% R.H. Inorganic therefore does not breed or promote bacteria and
fungus.
Essentially odorless.
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E. Collector Assembly
1.0 General Description:
-
The collector is assembled in four stages. First, the collector frame
and backing sheet are assembled. Second, the back and side insulation
are installed. Third, the tested absorber assembly is inserted, and
finally, the glazing, seal and cap are installed.
1.1 Container:
-
The container consists of sections of aluminum extrusion assembled
into a rectangular frame, with an aluminum backing sheet fitted into
slots and pop-riveted in place.
1.2 Insulation:
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Insulation is placed on the aluminum back and along the sides.
1.3 Absorber Assembly:
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The pre-assembled absorber is fitted into the insulated container
with the inlet and outlet connection pipes protruding through the
sides. A high-temperature EPDM gasket is then fitted onto the pipes
and locked
into the aluminum frame. The absorber is free to expand or contract
inside the container.
1.4 Glazing Assembly:
-
The pre-cut glass is cleaned and fitted onto the retainer ledge in
the collector container with a high-temperature continuous EPDM gasket.
A removable aluminum cap stripping is then secured to the container
with black oxide coated stainless steel screws.
2.0 Collector Container:
-
Collector container sides are fabricated from aluminum extrusions
with an integral mounting channel. The bottom is an aluminum sheet
which fits into a slot in the frame and is pop-riveted to the sides.
2.1 Materials:
-
Extruded framework is aluminum 6061-T6 alloy. The back sheet is
aluminum utility grade sheet with a thickness of 0.51 mm (.020")
2.2 Finish:
-
Aluminum frame comes in a standard dark brown baked enamel finish.
3.0 Moisture Control System:
-
Four holes in the back sheet allow sufficient air flow through the
collector to remove any condensation or moisture.
4.0 Sealant and Gaskets
4.1 General Description:
-
Inlet and outlet pipes are sealed with high-temperature round EPDM
gaskets. The continuous glazing gasket is a U-shaped EPDM neoprene.
Silicone caulking is used for the container corner sealant.
4.2 Chemical Composition:
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Header and glazing gasket: ethylene propylene diene monomer rubber
(EPDM) Caulking: silicone rubber
4.3 Physical Properties:
-
EPDM gasket has a tensile strength of 13800 kPa (2000 psi). Sealants
and gaskets do not corrode other collector materials.
4.4 Coefficient of Thermal Expansion:
4.5 Operating Ranges:
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F. Installation
1.0 Handling and Transportation
1.1 Packaging:
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Collectors are shipped individually in double-strength cardboard
boxes.
1.2 Labour and Equipment:
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Two people can move and mount collectors.
2.0 Mounting Procedure:
-
Collector mounting channel allows precise spacing between collectors.
Two adjacent collectors can be fastened to the sub-structure using
bolts positioned anywhere along the bolt track in the collector frame.
3.0 Collector Interconnection:
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Connection of up to four collectors in a single array. Collectors
use standard copper couplings sweat-soldered with 95/5 solder to
connect the internal manifolds of adjacent collectors.
4.0 System Connection:
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Piping connections are sweat-soldered to the ends of the collector
arrays using standard plumbing fittings.
5.0 Start-up Tests:
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i) Air or water pressure test.
- ii) Visual check for leaks.
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G. Operation
1.0 Method of operation and Control:
-
Collectors can be used in closed or open loop systems with water
or antifreeze.
2.0 Pressure Drop vs. Collector Flow:
2.1 Testing Information: Agency:
-
Agency: Bodycote Testing Group
- Date: January 18, 2007
- Fluid: water
3.0 Recommended Flow Rate:
-
0.8 to 1.5 L/min (0.18 to 0.33 IGPM)
4.0 Maximum Operating Pressure:
-
Factory tested to 1724 kPa (250 psi).
5.0 Recommended Operating Pressure:
-
Below 200 kPa (30 psi) for drainback systems and 135-270 kPa (20-40
psi) for closed loop systems.
6.0 Maximum Operating Temperature:
7.0 Stagnation Temperature:
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Stagnation temperature of the collector is approximately 170°C
(338°F).
8.0 Recommended Heat Transfer Fluids:
-
Propylene glycol USP, food grade antifreeze solution for closed loop
systems, and water for drainback and seasonal pool systems. The use
of inhibited glycols is not recommended. DO NOT use ethylene glycol.
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H. Maintenance and Warranty
1.0 Cleaning and Maintenance:
-
Glazing should be self-cleaning, depending on local conditions. Dirt
accumulation on the glass cover will be washed away by the rain.
If cleaning is required, use a standard window cleaning agent. The
glycol
antifreeze solution should be checked annually and renewed if necessary.
No other maintenance is normally required.
2.0 Manufacturer Servicing:
-
A trouble-shooting guide to help the home-owner maintain and service
the equipment is included in the installation manual. All service
and repair is readily available from the manufacturer or distributor.
3.0 Availability of Parts:
-
All parts are available from the manufacturer and distributors.
4.0 Replacement of Parts:
-
The glazing may be replaced in the installed system without removing
the collector from the array by removing the screws holding the glazing
cap stripping. Total replacement time is a maximum of fifteen minutes
and requires only a screw driver. Sensors are clamped on outlet piping
using screw-type pipe clamps. Replacement time is approximately ten
minutes. If the recommended installation procedures are followed,
one collector may be replaced in the array without removing another
collector.
Collectors are connected together with a standard copper couplings
(mechanical or soldered).
5.0 Warranty:
-
The solar collector absorber is warranted for a period of ten years.
Repair allowances may also apply. The manufacturer may repair or
replace the absorber as required at his discretion.
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I. Durability
1.0 Operating Experience:
-
The G32 has been installed worldwide since 1985.
2.0 Accelerated Aging Tests:
-
The collector has been subjected to 30 day plus high temperature
(204°C;400°F) stagnation tests at the Canadian National Solar
Test Facility with no evidence of deterioration (CSA F-378). One
year of stagnation at DSET laboratories in Arizona were also conducted
in
1982 with no sign of deterioration.
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J. Collector Efficiency
1.0 General Description
1.1 Test Method:
-
Tested in accordance with SRCC (Solar Rating and Certification Corporation)
Standard OG100-05, "Test Methods and Minimum Standards for Certifying
Solar Collectors" with reference to ANSI/ASHRAE Standard 93.
1.2 Testing Information:
-
Agency: Bodycote Testing Group
- Location: Ontario, Canada
- Lat. 43.53 °N Long. 79.66 °W
- Elevation: 160 m (525 ft)
- Date: January 18, 2007
1.3 Details of Tested collector:
-
Model: G32-P
- Glazing: low-iron tempered Solite
- Absorber material: aluminum fin and tube
- Absorber coating: SOLEC black paint
- Insulation: fiberglass
- Gross area: 2.982 m2 (32.10 ft2)
- Aperture area: 2.783 m2 (29.96 ft2)
- Absorber area: 2.870 m2 (30.89 ft2)
1.4 Comments:
-
The time constant, thermal efficiency and Incident Angle Modifier were
determined in the solar simulator.
2.0 Test Conditions
2.1 Collector Tilt and Orientation:
-
Normal to the direction of irradiation.
2.2 Heat Transfer Fluid:
2.3 Liquid Flow Rate:
2.4 Mean Ambient Air Temperature:
2.5 Wind Velocity:
2.6 Range of insolation:
3.0 Time Constant:
-
95 sec at 0.059 kg/s (0.139 lb/s) water
Inlet temperature: 22.8°C (73.0°F)
Ambient temperature: 20.1 (68.2°F)
4.0 Efficiency:
Efficiency curve is based on gross collector area, and was determined
using the indoor solar simulator. First order efficiency equation:
-
1st order: eff = 0.700 - 4.933(Ti - Ta)/G
- 2nd order: eff = 0.689 - 3.8475(Ti - Ta)/G - 0.01739(Ti - Ta)^2/G
-
5.0 Incident Angle Modifier:
K(ta) = 1 - 0.154(1/cosq - 1)
6.0 FSEC Standard Day Tests:
-
The following standard day tests were performed by The Florida Solar
Energy Center, (FSEC).
The G Series Collectors described by this brochure, when
properly installed and maintained, meet the minimum standards established
by the SRCC, (Solar
Rating & Certification Corporation). This certification does not
imply endorsement or warranty of this product by SRCC.
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