Solar Collectors

Pressurized Vacuum Tube Heat Pipe Solar Collector

Pressurized Vacuum Tube Heat Pipe Solar Collector

Models Vacuum Tube Aperture Area (EN) Gross Area Gross Length Gross Width Gross Height
Size Number Distance
RHA/RHB 58-1800-10 Dia.:58mm
L: 1800mm
10 pcs 80 mm 0.94 m2 1.68 m2 1990 mm 845 mm 137 mm
RHA/RHB 58-1800-12 12 pcs 1.13 m2 2.17 m2 1990 mm 1090 mm 137 mm
RHA/RHB 58-1800-15 15 pcs 1.41 m2 2.65 m2 1990 mm 1330 mm 137 mm
RHA/RHB 58-1800-18 18 pcs 1.70 m2 3.12 m2 1990 mm 1570 mm 137 mm
RHA/RHB 58-1800-20 20 pcs 1.89 m2 3.44 m2 1990 mm 1730 mm 137 mm
RHA/RHB 58-1800-22 22 pcs 2.07 m2 3.76 m2 1990 mm 1890 mm 137 mm
RHA/RHB 58-1800-24 24 pcs 2.26 m2 4.08 m2 1990 mm 2050 mm 137 mm
RHA/RHB 58-1800-25 25 pcs 2.35 m2 4.24 m2 1990 mm 2130 mm 137 mm
RHA/RHB 58-1800-30 30 pcs 2.83 m2 4.89 m2 1990 mm 2455 mm 137 mm
Tube number and tube distance can be adjusted according to customers’ requirements.

Performance
Collector heat transfer medium Water-Glycol
Flow rate for testing (per gross area, AG) dm/dt 0.011 kg/(sm2)
Max. temperature difference for thermal performance calculations (ϑm-ϑa)max 70.57 K
Standard stagnation temperature (G=1000 W/m2; ϑa = 30 °C) ϑstg 250 °C
Effective thermal capacity, incl. fluid (per gross area, AG) C/m2 4.55 KJ/(Km2)
Max. operating temperature ϑmax_op 226 °C
Max. operating pressure pmax,op 600 kPa
Max. tested positive load 3100 Pa
Hail resistance using steel ball (max. drop height) 1 m
Data required for CDR (EU) No 812/2013 - Reference Gross Area
Collector efficiency (ηcol) 39%
Zero-loss efficiency (η0 ) 0.443
First-order coefficient (a1) 0.611 W/(m2K)
Second-order coefficient (a2) 0.017 W/(m2K2)
Incidence angle modifier IAM (50°) 1.10

Models Descriptions RHA RHB
Manifold Case Aluminum Alloy (Anodic oxidation treatment) (Small version) Aluminum Alloy (Anodic oxidation treatment) (Large version)
Heat Exchanger Pipe Copper, Dia. 38 mm, 0.9 mm thick. Copper, Dia. 42 mm, 0.9 mm thick.
Insulation Rock wool Rock wool
Vacuum Tube SS-CU-ALN/ALN 58-1800. With aluminum end cap. SS-CU-ALN/ALN 58-1800. With aluminum end cap.
Heat Pipe Condenser dia. 14mm. Heat pipe 0.6mm thick, with 0.5mm copper shield. Condenser dia. 24mm, with nickel coating. Heat pipe 0.6mm thick, with 0.5mm copper shield.
Tube Distance 80 mm 80 mm
Aluminum Foil One complete piece One complete piece
Output 2 pcs of 3/4" copper fitting, 4mm thick, welded. 2 pcs of 3/4" copper fitting, 4mm thick, welded.
Temperature Sensor Port 2 ports (at both ends) 2 ports (at both ends)
Frame & Stands Aluminum Alloy, 2.0/2.5mm (Anodic oxidation treatment) Aluminum Alloy, 2.0/2.5mm (Anodic oxidation treatment)
Tube Bottom Holder Folding Folding
Materials and sizes can be adjusted according to customers’ requirements.