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Directory:Synchronous Solar Heliostat

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A Stationary Heliostat for Solar Energy Reflection

This is a permanent free energy resource.


by William A. Rhodes, Ph.D.; PES Network Inc Consultant

Contents

Introduction

I have three patents (expired) on a synchronous solar heliostat.  It is computer driven, always facing the sun in all seasons regardless of bad weather. It also was complete mechanical and electronic engineering, and expensive. Despite such obstacles, 20 were sold to a firm for daily illumination of abandoned Titan missile silos, where mushrooms were grown. Used in this venture were ordinary back-surfaced mirror costing about $6.00 per square yard of commercial 1/8' mirror. (4 KW heat and light per panel.)

Background for Research

Experimenting with stationary mirrors, two were mounted like a "corner" reflector. Reflection from this was opposite from the sun. In other words, facing south, the sun's movement is toward the right, and its reflection moves toward the left. When mounted at exactly 90 degrees from each other, I viewed myself as others see me. 

Mounting three mirrors 120 degrees apart makes another corner reflector, but this time sunlight is reflected back toward the sun, regardless of where it is in the sky. Tracking is perfect without any mechanical arrangement. It is known as an equilateral triangle. Small corner reflectors are used by land surveyors for bouncing a laser beam back to their eye. Its accuracy cannot be equaled by any other method. An inch one way or the other and the laser beam from the surveyor's position and it vanishes. They are expensive but permanent. 

What is needed is a mirror arrangement that makes the solar reflection stationary. One clue. The reflection must be exactly half way between open sunlight, and its opposite reflection with two mirrors.

These are inexpensive experiments, since test mirrors need be no larger than 6" squares. Any glass company can make them, but make sure their sharp edges are ground. My gut feeling is, somewhere out there the answer exists. 

Contact

William A. Rhodes <warlab {at} aztecfreenet {dot} org>


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