Abstract
Intermittency of renewable energy generation and electricity tariff variation make necessary the analysis and optimization of different scenarios of charge/discharge cycle timing and duration of a Liquid Air Energy Storage (LAES) and the economics related to each case. Solar irradiation and PhotoVoltaic (PV) power plant size, electricity prices, on-site electricity demand throughout the day/month/season and year are key factors here for the scenarios optimization in terms of cost of electrical energy consumed from the grid. These factors are also useful to determine the maximum allowed investment of the LAES and the payback time according to each case scenario. Self-sufficiency and positive economics of the LAES combined to cold warehouse are reached when PV power plant surface and solar irradiation are high enough. Therefore, there are optimal PV dimensions depending on the round trip efficiency of the LAES, the power capacity discharge/charge ratio of the system and the geographic location of the site. Main results suggest that LAES can only be profitable when electricity from grid is expensive.
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