Abstract: A highly protective firewall (13) supported between upstanding columns or beams (15). The firewall is made of an inorganic cementitious material which is preferably inorganic phosphate cement. In one form, the firewall comprises a group of vertically stacked panels (14) made of such material, and the panels are in turn formed by a plurality of elongated and vertically stacked hollow members (21) of the same material.
Abstract: A diffuser-augmented wind-turbine assembly in which the diffuser has a cylindrical central section rotatably supporting a rotor drum which in turn supports turbine blades without requiring a central support shaft. Wind energy drives the turbine blades and rotor drum, which in turn drive a generator of electrical power.