Jonathan Radcliffe

Can negative electricity prices encourage inefficient electrical energy storage devices

This paper explores whether negative electricity prices can change the rationale that efficient energy storage devices are more economical for arbitrage in electricity markets. An established model algorithm to determine the maximum available arbitrage revenue and optimum schedule of electrical energy storage (EES) operation is used to simulate storage with a time-series of electricity prices which includes some negative prices. Our results suggest that at any likely frequency of negative electricity prices, inefficient EES is not encouraged, and can only be encouraged for EES devices with very low energy capacity to power ratios.

Liquid Air Energy Storage

Abstract Liquid air energy storage refers to a technology that uses liquefied air or nitrogen as a storage medium. The chapter first introduces the concept and development history of the technology and then follows it up with thermodynamic analyses. Applications of the technology are then discussed through integration under different scenarios particularly with gas turbine-based peaking plants, nuclear power plants, solar thermal power generation, and liquefied natural gas regasification. Finally, comparisons are made between liquid air energy storage technology and a number of other energy storage technologies both technically and economically.