Solar & Thermal
Systems, Inc.
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The Light is Green




Pointing at the sun
all day long

 Is can be difficult, or
it can be easy as pie

  Our proprietary solar panel design consists of interconnected closed loop pipes containing a working fluid. Inexpensive parabolic mirrors focus concentrated (20 times) sunlight on the network of pipes containing the working fluid. That heat causes the fluid in the tubing to vaporize and thereby generate pressure (steam).

  The pressurized vapor is piped into our proprietary engine design The vapor is introduced into the intake side of our radial array two cycle piston steam engine where it drives the pistons. During the down stroke, the vapor condenses. Having the condensation occur within the engine allows STS to extract further energy from the working fluid.

  The ensuing up stroke pushes the vapor/liquid out the exhaust port into the condenser. A return pump then pushes the liquid back into the solar panel array to vaporize again and continue the cycle.

  The engine crankshaft turns a conventional, commercially available generator, at a preset R.P.M., to ensure a cycle match to the generation needs of the installation. The same piston engine is of sufficient capacity for systems ranging up to 500kW. This output increase is achieved by adding additional panels and upgrading the generator.  The engine is versatile and efficient enough to power systems as small as 50kW.

  What enables the STS to successfully operate in this role is the Computer Controlled Variable Valve Technology developed by Paul Passarelli, the founder of STS and the Chief Technology Officer. Without this innovation, the piston engine would not be able to maintain a steady speed, which is required for usable electrical generation.

  The energy efficiency of the STS design is some multiple greater than Photo-Voltaic systems or any of the turbine or Sterling engine solar-thermal systems operating over the same temperature range. Additionally, when economics are taken into the efficiency equation (the system build, install and operating costs), the STS system is many times more efficient.

 Also inherent in the design is the ability to operate from heat sources other than the Sun. The main unit of the STS system, which contains the engine, condenser, generator and computer controls, can just as easily be operated by waste or geo-thermal sources of heat. Obviously, this versatility is not shared with any other solar generation approaches.




Copyright 2001, 2009 Solar & Thermal Systems, Inc. All Rights Reserved.
S&T, STS, STSI, and other abbreviations are Service Marks of Solar & Thermal Systems Inc.
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AEG, PMP, MLP, DRP, are used with permission.
Phoenix logo© and Swirling Rays© Copyright 2005 Solar & Thermal Systems Inc.
Tri-lobed Sun© Copyright 2006 Solar & Thermal Systems Inc.
The Light is Green!© Copyright 2006 Solar & Thermal Systems Inc.
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All other Trademarks, Service marks, etc., are the property of their respective owners.
Updated: 09/11/10 19:33