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  TRX Evacuated Tube Type Solar Heat Collector

Descriptions

Specifications

Installation Recommendations

Evacuated Tube VS Flat Plate

Test Results by Hameln/Emmerthal Lab

     

Evacuated Tube Solar Heat Collector

   

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 .
  • 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.

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 PU insulation foam

G22 3/4" Hex connector

   

Unique 3 pipe / manifold  design for easy pipe  connection and maximum heat pickup .

   
 

 Close-loop System Diagram

 

 

 

 

 

 

 

 

 

   

Specifications

Panel Model Number

TRX-58x1500 / 12

TRX-58x1800 / 12 

Dimensions

Φ58x1500 mm

Φ58x1800 mm

Number Of Tubes

12

12

U Copper tube diameter

Φ10+/-0.6 mm

Φ10+/- 0.6 mm

Pipe Connector size

Stainless steel flexible conduit                              with G22 ¾ inch Hex connectors is included

Insulation material

CFC free Polyurethane Rigid Foam

Reflector

Diffuse Flat Reflector

Circulating Fluid

Water glycol or pure water

Fluid Content

2.75 L

3.15 L

Tested Pressure

12 kg/cm2  (12Bar)

12 kg/cm2   ( 12Bar )

Operating System Pressure

6 kg/cm2  (6Bar)

 6 kg/cm2  ( 6Bar )

Daily heat collection efficiency

50%

50%

Light collection surface M2

1.6

1.9

Heat collection surface M2

2.6

3.15

Collector’s dimensions Length/Width/Height

1690x1000x170mm

1990x1000x170mm

Net Weight

39 KG

47 KG

Packing Dimensions

1730x1110x185mm

2030x1110x185mm

Gross Weight

46 KG

55 KG

                                   

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  Installation Recommendations

 

 

 

 

 

 

 

  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

 

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 .

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Test Data

Evacuated tube heat collector   vs  Flat Plate Type heat collector

 

 

 

 

Maker

Type A

Type T

TRX

Type

Flat Plate

Evacuated Tube

Evacuated Tube

Gross Area m2

3.384

2.816

3.150

Absorber Area m2

2.964

2.000

1.990

System Efficiency ( On Absorber Area)

39%

55%

Over 60%

Power Generation    Kw-h/m2/year

402.5

517

635

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  Summary of Comparison  
  Evacuated Tube Flat Plate
Surface Area  30% less larger surface
Weight Lighter Heavier
Wind load Low , save on mounting High , need strong mounting
Efficiency about 50% more Average
Suitability All weather Only good for sunny days
Water Temperature Above boiling <65 C ( 150 F)
Suitable for All areas , TRX system works to -30 ° C ( -22° F ) No suitable in areas with freezing winter
Cost 25% more Average
   

Tests done  on Solar Heat Collectors with AL-N/AL and Cu-N/AL Coatings

by ISE Hameln/Emmerthal Test Lab

 

 

 

 

 

 
 

Multi-layer Al-N/Al

 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
  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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