1. British Standard 6757;Anon,1986
2. Anon (1977a) ASHRAE Standard 94-77. Methods of testing thermal storage devices based on thermal performance. ASHRAE, New York
3. Anon (1977b) Methods of testing to determine the therma1 performances of solar collectors, AS RAE Standard 93-77. American Society of Heating, Refrigeration and Air-conditioning Engineers, New York
4. Atkinson P (1980) Feedback control theory for engineers. Heinemann Educational Books, London
5. Bailey PH, Williamson WF (1965) Some experiments on drying grain by solar radiation. J Agr Eng Res 10:191–196