Session: 09-01 Compressed (CAES) and Liquid (LAES) Air Energy Storage

Paper Number: 153053

Multi-Criteria Comparison of Commercial Scale ACAES With PTES for Grid and Energy Services 

With the penetration of renewable energy sources into the market, energy arbitrage i.e. to store energy from the grid at the time of low demand(thus at lower cost) and release it into the grid at the time of high demand(at higher cost), is becoming common practice. To better harness the price curves in ever-expanding renewable energy markets, large-scale energy storage solutions that can provide GWh of storage capacities and hundreds of MWs of power with flexible charging and discharging rates are required; with charging time of 6h to 8h shaving peak renewable energy production load from the grid in the daytime and 10 to 14 hours discharging time at the night to meet the consumer electricity demands.

Adiabatic compressed air energy storage(ACAES) is an already commercialized solution providing such large-scale arbitrage services, it has demonstrated its clear potential in terms of high lifetime scalability, low self-discharge, long discharge times, relatively low capital costs, and high durability. On the other hand, Pumped thermal energy storage(PTES) although still not commercialized, aims for the same category of storage solutions while providing additional benefits of no geographical constraints and no pressurized storage equipment in contrast to ACAES.

This study compares the already commercialized ACAES technology with emerging PTES technology for multiple techno-economic criteria. Both ACAES and PTES are modeled for providing 100MW of discharging power for 12 hours with 8 hour of charging for round trip efficiency of 71%. These constraints are then used to optimize the thermodynamic operating parameters of both the technologies for minimizing the capital cost of equipment and finally LCOS. Other parameters of plant foot print, energy density, detailed equipment cost and operational cost comparison is provided as well. Finally, both technologies are evaluated for any additional services that they can provide and their effect on revenue generation.

Presenting Author: Alberto Traverso University of Genoa

Presenting Author Biography: Alberto Traverso, full Professor of Energy and Environmental Systems at the University of Genoa, Italy, since 2019. He started his academic career as an Assistant Professor in 2005 at the Genoa Rolls-Royce University Technology Centre.He is leading experimental and modeling activities on the Design, performance, dynamics, and control of Innovative Energy Systems, including cyber-physical systems

Authors:

Syed Safeer Mehdi Shamsi University of Genoa
Stefano Barberis University of Genoa
Caesare Lancini Baker Hughes
Gianfranco Maffulli Baker Hughes
Davide Biliotti Baker Hughes
Alberto Traverso University of Genoa