=+8-30.

Compute the sol-air temperatures for a west-facing wall in Albuquerque, NM, for each hour of the day on July 21. Assume 0.4 percent outdoor design conditions. The wall has a solar absorp-

tivity of 0.8, a thermal emissivity of 0.9, and an exterior surface conductance of 4.0 Btu/

(hr-ft -- F).