Fundamentals of Renewable Energy Processes, 3rd Edition

Chapetr 1

Generalites

1.1 Units and Constants

Although many different units are employed in energy work, we shall adopt, when possible, the “Système International,” SI. This means joules and watts. If we are talking about large energies, we’ll speak of MJ, GJ, TJ, PJ, and EJ—that is, , and joules, respectively. See Table 1.1.

Table 1.1 SI Prefixes and Symbols

One might wish for greater consistency in the choice of names and symbols of the different ...