Solar energy trap having expanded polyamide body with film covers - used as lightweight, weather resistant roof-top trap

摘要

A solar energy trap comprises a trough made of rigid foam having softening and degradation temps. =175 degrees C and covered with a taut transparent thermoplastic film. The base of the trough channel is fitted with rubes or partitions for circulating a heat exchanger fluid (air). For roof-top applications, mounted between rafters beneath a sheet of 3mm glass or PMMA. The design is simple and the components are cheap and corrosion-resistant.