Abstract
A pumped thermal energy storage (PTES) system, also known as pump heat energy storage, is one of the most recent technologies introduced for electricity storage at large- and medium-scale applications. The PTES system, which is in the category of mechanical energy storage (MES) systems, is a promising technology that is likely to be broadly implemented worldwide in the near future. This system can be used not only for electricity storage/production but also for cogeneration of electricity and heat or even trigeneration of electricity, heat, and cold. This chapter presents a detailed description and fundamentals of the system and how it works. It also examines the state of the art of the technology, which is immature compared to other MES systems. Finally, it gives detailed mathematical modeling of the system and discusses the future perspectives of this technology.
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