Design and optimization of a novel wind‐powered liquefied air energy storage system integrated with a supercritical carbon dioxide cycle

Abstract

In this paper, a novel liquefied air energy storage (LAES) system driven by wind energy and natural gas, integrated with a two‐stage supercritical carbon dioxide cycle is proposed and investigated. Three different sensible thermal energy storage (TES) systems are considered in this study to store the heat produced in the compressions stage and use it later to improve the performance. The proposed system is analyzed in terms of energy, exergy, exergo‐economic, and environmental impacts. A detailed economical and technical investigation is carried out to determine system hotspots, exergy destruction rates, and the performance of the system and subsystems. Finally, by considering ten design variables, the nondominated sorting genetic algorithm‐II (NSGA‐II) is employed to evaluate the optimal design solutions for double objective functions, including cost per unit of exergy and overall system exergy efficiency. Results indicate that for a 50 MW of discharging power, 80.75 MW of charging electricity and 1.22 kg/s of fuel are required. Additionally, the product cost per unit of exergy and the levelized costs are calculated as 32.02 $/GJ and 0.133 $/kWh, respectively. The results of the optimization study also show that for the optimal Pareto solution, the energy efficiency would be 52.2% while the exergy efficiency is 45.26%.

Design and optimization of new energy storage systems for energy transformation

“…This not only effectively consumes distributed photovoltaics, but also reduces the adverse impact of human electricity demand on the optimization and upgrading of comprehensive energy systems. 4 The introduction of energy storage systems in intelligent distribution networks can promote the implementation of efficient management of distribution network demand, reduce peak loads, improve low valley loads, balance load curves, ensure the actual utilization efficiency of core equipment, and minimize investment in power supply costs; It can also suppress fluctuations in photovoltaic output, reduce the probability of grid impact, improve the ability of the distribution network to absorb photovoltaic energy, greatly improve the safety and reliability of power supply, ensure the safety and stability of the comprehensive energy system, and is also the most obvious manifestation of the advantages of new energy power generation. 5 The construction of energy storage systems is bound to break traditional power models and effectively promote the long-term development of China's related power industry.…”

Day-ahead Scheduling of Integrated Energy System Coupled with Liquid Air Energy Storage System

“…The energy storage system is an essential component of an integrated energy system, liquid air energy storage(LAES) is an emerging energy storage method, and its advantages of ease of storage, environmental friendliness, and enhanced commercial viability [5]. Most of the current research on LAES is directed to the thermodynamic and exergy analysis of the system to improve round-trip efficiency [6]- [12]. References [6]- [9] combine liquid air energy storage and solar energy to improve efficiency.…”

“…In Ref. [12], a new liquid air energy storage system driven by wind and natural gas combined with a two-stage supercritical CO 2 cycle is proposed and investigated, considering the use of different sensible thermal energy storage to improve system performance. System performance is the main drawback of the current system [13].…”