Efficiency of solar collectors

Eckert, 1959, Heat and Mass Transfer, 403 Carlson, 1956 Catton, 1974, Natural convection flow in a finite rectangular slot arbitarily orientated with respect to the gravity vector, Int. J. Heat Mass Transfer, 17, 173, 10.1016/0017-9310(74)90079-9 Hollands, 1973, Experimental study of the stability of differentially heated inclined air layers, Int. J. Heat Mass Transfer, 16, 1467, 10.1016/0017-9310(73)90153-1 Powe, 1971, A numerical solution for natural convection in cylindrical annuli, ASME Trans, J. Heat Transfer, 93, 210, 10.1115/1.3449790 Moon, 1940, Proposed standard solar radiation curves for engineering use, J. Franklin Inst., 230, 583, 10.1016/S0016-0032(40)90364-7 Schmidt, 1965, High temperature space-stable selective solar absorber coatings, Applied Optics, 4, 917, 10.1364/AO.4.000917 McDonald, 1975, Spectral reflectance properties of black chrome for use as a selective coating, Solar Energy, 17, 119, 10.1016/0038-092X(75)90067-5 Eckert, 1973, Solar Power Perry, 1963, Chemical Engineers' Handbook, 10