1. Methods of testing to determine the thermal performance of solar collectors;ASHRAE Standard 93-77,1977
2. Thermohydraulic performance of packed bed solar air heaters;Ahmad;Energy Conv. Manag,1996
3. Solar Heating Design by the f-Chart Method;Beckman,1977
4. Solar energy collector for heating air;Bevill;Solar Energy,1968
5. Turbulent and transition flow convective heat transfer in ducts;Bhatti,1987