Kandpal, T.C.; Mathur, S.S.; Singh, R.N. - In: Applied Energy 7 (1980) 1-3, pp. 191-199
The geometrical concentration characteristics of a two-stage system employing a composite parabolic trough as a primary--and a compound parabolic concentrator as a secondary--concentrator are discussed. The relative merits of such a two-stage system over a single-stage CPT are brought out from...