Year: 1984
Type: report
Abstract: The principal conclusion of the project is that large aperture linear parabolic troughs are not cost-effective for PV applications. Ground mount installations should be given consideration over roof mount systems if land space permits. The higher design costs and installation costs associated with roof installation make it less desirable. Roof structures should be carefully evaluated. In this case, the structure was not as strong as early estimates indicated, particularly in torsion. High thermal conductivity and electrical resistivity design parameters make PV module design very complex. Conductivity and resistivity are not the only material design constraints. Material selection analysis must also account for ultraviolet stability, resistance to other than ultraviolet weathering, and compatibility of thermal expansion properties between materials. The intercept factor as well as the collector design ability to maintain the intercept factor must be carefully examined during the selection process. Non-uniformity of illumination may severely effect power output due to diode by-passing of poorly illuminated cells. The linearity of the focal beam and the collector structural integrity to maintain a linear focus are extremely important selection considerations. In the case of the CAPVC system, wind-up in the torque tube has produced a non-linear focal beam making accurate focus and total illumination of the receiver tube impossible.
DOI: 10.2172/6294971
Authors: E. DiBello, T. Reynolds, T. Lambarski
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W88535858