This book provides fundamental theoretical concepts for the understanding, the modelling, and the optimisation of energy conversion and storage devices. The discussion is based on the general footing of efficiency-power relations and energy-power relations (Ragone plots). Efficiency and Power in Energy Conversion and Storage: Basic Physical Concepts, is written for engineers and scientists with a bachelor-degree level of knowledge in physics. It contains:

  • An introductory motivation of the topic
  • A review on equilibrium thermodynamics
  • A primer to linear non-equilibrium thermodynamics and irreversible processes
  • An introduction to endo-reversible thermodynamics
  • The basics on the theory of Ragone plots
  • Derivations of efficiency-power relations or Ragone plots for illustrative examples like heat engines, batteries, capacitors, kinetic energy storage devices, solar power, photodiodes, electro-motors, transformers, and flow turbines
  • An excursion to impedance matching and the optimization of technical devices with respect to economic and related objectives 

chapter 1|8 pages


chapter 2|40 pages

Equilibrium Statistical Thermodynamics

chapter 3|18 pages

Linear Nonequilibrium Thermodynamics

chapter 4|14 pages

The Entropy Production Rate

chapter 5|16 pages

Endoreversible Thermodynamics

chapter 6|14 pages

Ragone Plots

chapter 7|36 pages

Power and Efficiency Limits

chapter 8|14 pages

Performance Optimization