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Evacuated Tube Solar Heat Collector |
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Descriptions
- High strength evacuated tube array with proven TRX
selective coating technology to convert maximum solar radiation energy
from the sun
- 12 evacuated tubes are assembled in a panel . U
tubes are inserted in each tube from the header manifold and are
connected in parallel . Each U tube is coiled with aluminum foil to
effectively remove the trapped heat from the tube .
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The end of each evacuated tube is well
insulated with polyurethane foam to ensure no heat loss in the header
manifold .
- A pair of inlet/outlet hex connectors
are located in each end of header for easy pipe connection from panel to
panel .
- 3-pipe connector ( In / Out / Common )
design ensures easy pipe connections between collectors and maximum heat
removal .
-
G22 3/4" Hex connector with
flexible stainless steel conduit for external pipe joining.
- Virtually no wind load , unlike flat
bed collector
- At least 30% more efficient than flat
bed collector and smaller in size
- Can be used in all weather , all
seasons .
- In closed loop pressurized system ,
this collector is capable of collecting very high heat for thermal
absorption chillier applications.
Go Top |
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PU insulation foam
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G22 3/4" Hex connector |
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 Unique
3 pipe / manifold design for easy pipe connection and maximum
heat pickup . |
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Close-loop
System Diagram
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Specifications
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Panel
Model Number |
TRX-58x1500 / 12 |
TRX-58x1800 / 12 |
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Dimensions |
Φ58x1500 mm |
Φ58x1800 mm |
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Number
Of Tubes |
12 |
12 |
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U
Copper tube diameter |
Φ10+/-0.6 mm |
Φ10+/- 0.6
mm |
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Pipe
Connector size |
Stainless steel flexible conduit with G22 ¾ inch Hex
connectors is included |
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Insulation material |
CFC
free Polyurethane Rigid Foam |
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Reflector |
Diffuse Flat Reflector |
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Circulating Fluid |
Water
glycol or pure water |
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Fluid
Content |
2.75 L |
3.15 L |
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Tested
Pressure |
12
kg/cm2 (12Bar) |
12
kg/cm2 ( 12Bar ) |
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Operating System Pressure |
＜6 kg/cm2
(6Bar) |
＜6
kg/cm2 ( 6Bar ) |
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Daily
heat collection efficiency |
＞50% |
＞50% |
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Light
collection surface M2 |
1.6 |
1.9 |
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Heat
collection surface M2 |
2.6 |
3.15 |
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Collector’s dimensions Length/Width/Height |
1690x1000x170mm |
1990x1000x170mm |
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Net
Weight |
39 KG |
47 KG |
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Packing Dimensions |
1730x1110x185mm |
2030x1110x185mm |
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Gross
Weight |
46 KG
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55 KG |
Go Top |
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Installation Recommendations
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Installation angle : Angle of
inclination is about the same as the local latitude +/- 10 deg facing south
(northern hemisphere) or facing north (southern hemisphere)
eg: The best inclined angle
= local latitude - 10
if it is not used in Winter
or = local latitude + 10 if it is used
in Winter |
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Flow rate
Volumetric flow rate should be controlled to 0.01
to 0.02 liter/sec , or 36 to 72 liter/hr for each square meter area of
collector surface .
Linear flow rate should be adjusted to below 2
meter /sec .
For best efficiency , take the lower value in the range .
Go Top |
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Test Data
Evacuated tube heat collector vs Flat Plate Type
heat collector
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Maker |
Type A |
Type T |
TRX |
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Type |
Flat Plate |
Evacuated Tube |
Evacuated Tube |
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Gross Area m2
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3.384 |
2.816 |
3.150 |
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Absorber Area m2 |
2.964 |
2.000 |
1.990 |
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System Efficiency
( On Absorber Area) |
39% |
55% |
Over 60% |
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Power Generation
Kw-h/m2/year |
402.5 |
517 |
635 |
Go Top |
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Summary of Comparison |
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Evacuated Tube |
Flat Plate |
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Surface Area |
30% less |
larger surface |
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Weight |
Lighter |
Heavier |
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Wind load |
Low , save on mounting |
High , need strong mounting |
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Efficiency |
about 50% more |
Average |
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Suitability |
All weather |
Only good for sunny days |
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Water Temperature |
Above boiling |
<65 C ( 150 F) |
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Suitable for |
All areas , TRX system works to -30
° C ( -22° F ) |
No suitable in areas with freezing winter |
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Cost |
25% more |
Average |
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Tests done
on Solar Heat
Collectors with AL-N/AL and Cu-N/AL Coatings
by ISE Hameln/Emmerthal Test
Lab
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Multi-layer
Al-N/Al
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2 layer Cu-N/Al by TRX |
| Area of
solar heat collector |
5 sq meter |
5 sq meter |
| Heat
loss coefficient K |
k1=1.72 W/m2 K |
k1=1.08W/m2 K |
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k2=0.0068 W/m2 K |
k2=0.0031W/m2K |
| Heat
collection per unit area per year |
564 KW-hr/sq meter |
635 KW-hr/sq meter |
| Test
done on |
8th Nov 1999 |
9th Oct 2001 |
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Solar
