The Energy Shade Curtain Systems provide shading and heat retention.  Curtains are driven open and closed by a motorized (gear drive) system governed by commands from a controller.  Commands are set to shade based on solar energy and run to a percentage closed based on total run time (open close).  Solar energy information is relayed controller from an outdoor solar energy (radiation) sensor perched high outside above greenhouses.  Commands also close curtains when outdoor temperature reach a specific low temp outside.  For instance, when temps drop below 55F at night, curtains close to help retain perimeter heat down on plant canopy.  This helps minimize steam usage. 

As explained above, the system is driven by a motorized gear drive system.  The motor is sited inline a drive shaft which when activated spins either left or right .  Airline cable is spun around drive shaft and through a series of pullies which makes its way to a clamp on leading edge of curtains.  As curtains open, the drive shaft activates releasing cable from one side of shaft, pulling curtain open, and landing cable on adjacent side of drive shaft.   Opposite for closing. 

For energy retention, there is  a specialized fabric material that acts as a gasket around edges of curtain when drawn closed.  These “gaskets” are stationary.  For shading, curtains can be procured to shade to a given percent.