This volume will prove of vital interest to those studying the use of renewable resources. It presents physical and mathematical descriptions of the nine generic wave energy conversion techniques, along with their uses and performance characteristics, plus several electro-mechanical energy conversion techniques and worked examples. 1981 edition.
Here's a sample of other books in this Dover category
Synthetic Fuels by Ronald F. Probstein, R. Edwin Hicks This unified presentation examines the methods and processes for converting coal, oil, shale, tar sands, and various forms of biomass into liquid, gaseous, and clean solid fuels. 1982 edition.
Oceanographical Engineering by Robert L. Wiegel Valuable both as a graduate-level text and as a reference for engineers and scientists, the classic features descriptive and mathematical sections, supplemented by hundreds of drawings and photographs. 1964 edition.