.~ Rollable or foldable collector unit of nonrigid material {2}
625
.~.~ Fluent medium is gas
DEFINITION
Classification: 126/625
Fluent medium is gas:
(under subclass 624) Apparatus wherein the fluent medium is a gaseous substance. [figure] [caption]Method and apparatus for converting solar radiation to thermal energy for heating a gaseous stream such as air to be used for heating or drying purposes. The air or other gaseous passage defined by plastic film formed of solar radiation absorbing or opaque (black) material and the film is inflated by the fluid pressure for the gaseous stream passing therethrough.
