Abstract
Cryogenic Energy Storage (CES) systems are able to improve the stability of electrical grids with large shares of intermittent power plants. In CES systems, excess electrical energy can be used in the liquefaction of cryogenic fluids, which may be stored in large cryogenic vessels for long periods of time. When the demand for electricity is high, work is recovered from the cryogen during a power cycle using ambient or waste heat as an upper heat source. Most research is focused on liquid air energy storage (LAES). However, natural gas can also be a promising working fluid for the CES system. This paper presents a natural gas-based CES system, coupled with a low temperature packed bed cold storage unit. The cold, which is stored at a low temperature level, can be used to increase the efficiency of the cryogenic liquefiers. The model for the packed bed in a high grade cold storage unit was implemented and then compared with the experimental data. The impact of cold recycling on the liquefaction yield and efficiency of the cryogenic energy storage system was investigated
Highlights
Increasing the share of renewable energy sources in the production of electricity is one of the main goals of the European energy strategy
Most available research on Cryogenic energy storage (CES) systems is focused on liquid air energy storage (LAES), as atmospheric air is widely available and the location of the energy storage plant is not restricted
This paper investigates the cryogenic energy storage using natural gas (NG) as working fluid
Summary
Increasing the share of renewable energy sources in the production of electricity is one of the main goals of the European energy strategy. The main principle of CES systems can be summarized as follows: off-peak electrical energy can be used to liquefy cryogenic fluid. Most available research on CES systems is focused on liquid air energy storage (LAES), as atmospheric air is widely available and the location of the energy storage plant is not restricted. Natural gas can be a promising working fluid for the CES system because of its potentially higher efficiency [2]. It is widely available in industrial countries, due to developed gas pipeline system. This paper investigates the cryogenic energy storage using natural gas (NG) as working fluid
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
