Decentralized poly-generation of energy: Basic concepts

Abstract

This chapter presents the basic concepts for primary energy forms, energy conversion, delivered energy, and energy needed by consumers to satisfy their needs (useful energy). The conversion of primary energy into useful energy is evaluated on the basis of the energy efficiency factor for separate energy generation, cogeneration, and trigeneration. The difference between the primary energy in the case of separate production and the primary energy in the case of combined production represents the primary energy corresponding to the saved fuel. The energy saving measure is achieved through the primary energy savings (PES) or percent fuel savings. Finally, a trigeneration energy conversion is exemplified and the performance indicators of the system are given.