The XCPC has been under development for over 9-years and is currently at the “real world” commercial product stage.
Gross Area: 2.7 m2 - 29.05 ft2
Aperture Area: 2.41 m2 - 25.92 ft2
Length: 2211.38 mm – 87 1/16th Inches
Width: 1220.63 mm – 48.1/16th Inches
Height: 406.40 mm – 16.0 Inches
Weight: Dry-37.29 kg - 82.2 lbs
Wet- 39.29 kg - 86.61 lbs.
Fluid volume: 2 liters - 0.53 gallons
Flow rate: 0.87 gpm - 3.29 liter per minute
UC MercedSolar Lab 2013
External Concentrating Parabolic Collector
The XCPC is a patented Non-Imaging Concentrating Collector (NICC).
The XCPC pairs a custom evacuated tube solar collector with an external non-imaging reflector in a non-tracking, roof or ground mountable system. This combination enables the XCPC East/West design to cost effectively achieve temperatures in excess of 392oF / 2000C at more than 50% efficiency - which current market incumbents cannot attain without tracking.
Efficiency is defined here as the percentage of solar energy hitting the collector aperture that is converted to useful heat energy.
Flat plate and other evacuated tube collectors exhibit good efficiency characteristics at lower temperatures but heat losses mean that their efficiencies fall off rapidly at higher temperatures (~80-100C).
The vacuum tube on the XCPC is not simply mated ad-hoc to a reflector; rather the concentrator and collector have been specially tuned to ensure maximum usage of available solar energy.
The collector has an exceedingly wide angle of acceptance – maintaining peak energy generation even when the light strikes it at a wide angle. The concentration ratio is 1.4 meaning the absorber receives an additional 40% of the suns energy allowing the collector to achieve high temperatures.
The custom collector maximizes heat collection and along with its integrated fluid channels reduces component materials and costs.