having two or more passages for the same working fluid layered in the direction of solar rays, e.g. having upper circulation channels connected with lower circulation channels

Full Title

Solar heat collectors using working fluids > having two or more passages for the same working fluid layered in the direction of solar rays, e.g. having upper circulation channels connected with lower circulation channels

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

HEATING; RANGES; VENTILATING

Subclass:

SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS