tim i i

Fisher and Pry — i i —

Figure 1.7 Fisher-Pry plot for 17 different substitutions.

The normalized time variable, t = j-j^-, is introduced as follows.

For t = th,f = 0.5 and f ln i _ f = ath + b = 0 .'. b = -ath. (1.5)

For t = tin, f = 0.1 and lnff = atin + b = -2.2. (1.6)

Owing to the symmetry of the logistics curve, the takeover time, ts, is twice the interval, th — tin, hence, subtracting Equation 1.6 from Equation, 1.5,

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The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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