Test methods for solar collectors — Part 3: Thermal performance of unglazed liquid heating collectors (sensible heat transfer only) including pressure drop

Establishes methods for determining the thermal performance of unglazed liquid heating solar collectors. Contains methods for conducting tests outdoors under natural solar irradiation and simulated wind and for conducting tests indoors under simulated solar irradiation and wind. Not applicable to those collectors in which the heat transfer fluid can change phase.