Abstract: Dry cooling systems and methods are provided including at least one plastic elongated tube formed at least partially of a semi-rigid material and having a flat wall portion, a reflective material attached to said flat wall portion of the tube to reflect solar radiation, and at least one fluid channel in thermal communication with the reflective material, the fluid channel adapted to allow flow of a heat transfer fluid. Thermal power plants are provided which include a dry cooling system, one or more pipes in fluid communication with the dry cooling system, and at least one heat exchanger in fluid communication with the one or more pipes.

Abstract: Compositions and methods herein provide monopropellants comprising nitrous oxide mixed with organic fuels in particular proportions creating stable, storable, monopropellants which demonstrate high ISP performance. Due to physical properties of the nitrous molecule, fuel/nitrous blends demonstrate high degrees of miscibility as well as excellent chemical stability. While the monopropellants are particularly well suited for use as propulsion propellants, they also lend themselves well to power generation in demanding situations where some specific cycle creates useable work and for providing gas pressure and/or heat for inflating deployable materials.