Cell String Model with Mirror GAP Shading for a Parabolic-Trough Photovoltaic Collector

摘要

A model is described of a photovoltaic cell string which is illuminated by a parabolic trough reflector. The model shows what effect reflector gaps have on cell illumination and how this effect influences shunting of dioded strings for various angles of solar incidence. The model was formulated to study diode string length and determine how best to maximize power under variant incidence angles. Qualitative results suggest that a nonuniform dioding arrangement would minimize power losses due to shunting; that small strings should be used where shading is most probable; and, for north-south axis collectors, that the receiver should be moved northward to avoid end losses and end shading of the receiver. (ERA citation 06:021775)