Chapter two

Simple Solar Basics

Abstract

This chapter discusses the basic fundamentals of the earth and sun relationships including seasonal and positional orientation with respect altitude and azimuth. Geographic projections referred to as sun path diagrams generate Mercator projections and are illustrated and explained during a discussion on siting a solar energy system. The use of isogonic charts to compensate for the earth's magnetic field in determining collector orientation is also explained as well as the general rules used for collector tilt. In addition, the importance of collector shading and the use of Mercator projections and instrumentation for evaluating sites for possible shading restrictions are discussed. Sample Mercator projections ...

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