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Rioglass - Model UVAC 90 7G - Heat ...

Rioglass - Model UVAC 90 7G -Heat Transfer Fluid Receiver (HTF)

The UVAC 90-7G is our first large aparterture trough receiver. Based on the RS-UVAC 70-7G technology, this large diameter receiver enables more energy absorption, hence increasing the energy output per unit. The UVAC 90-7G has been developed by Rioglass based on more than 20 years of proven track record of developing HCEs for the solar thermal industry by Solel. The UVAC tubes are built and tested for extreme environmental conditions and complies with strict standards and quality for Power Piping as well as for Boiler & Pressure vessel (e.g.: ASME B31.1, ASME VIII).

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solar thermal industry

Extremely high solar absorption
Reduced heat losses
Larger active area
Increased thermal heat production
No fluorescent phenomena
Long-term hydrogen prevention
Based on over 20-years of field-proven experience

Stainless steel tube:

Length: 4,061mm, ±1mm
Outer diameter: 88.9mm, ±0.38mm
Wall thickness: 2.5mm, ±0.25mm
Selective coating at THTF (HTF temperature): 20℃
Coating technique: sputtered, selective
Average solar absorptance by spectrophotometer after annealing (according to ASTM G173): α ≥ 96.2%
Emissivity Factor (by FTIR): ε≤ 9.5% at temperature 400˚C

Glass tube:

Outer diameter (Borosilicate A.R.): 135mm, ±1.8mm
Wall thickness: 3mm, ±0.5mm
Means solar transmittance along 100% of the glass envelope (Air Mass 1.5 according to ASTM G173): τ ≥ 96.4%
Active area (bellow shadowing) at THTF of 350℃: ≥ 96.4% of bulk length
Number of bellow convolutions: 3
Net weight (without HTF): 34 kg
Maximum absolute design pressure (at 350˚C): 40 bar
Vacuum pressure: ≤ 10-4 mbar
Getter Hydrogen absorber: Designed for 25 years product lifetime
Design for maximum HTF temperature of 400°C (450°C for 10% of the accumulative operation time)

The RS-UVAC 90-7G Components:

Coated Stainless Steel Absorber tube
Coated Glass Sleeve Enclosure
Glass to Metal Joints
Bellows
Getter & Barium Getters
External shields
Internal shield

Rioglass - Model UVAC 90 7G -Heat Transfer Fluid Receiver (HTF)

Benefits

Specifications

Heat Transfer Fluid Receiver (HTF)