Session: 03-03: Energy Storage Separate from CSP: Thermal, Mechanical, Thermochemical

Paper Number: 130645

130645 - Modelling and Simulation of Steam Carnot Battery With Electric-Thermal Complementarity 

Abstract: 

The recuperation and utilization of waste heat discharged into the environment during numerous industrial processes have the potential to mitigate a substantial portion of fossil fuel consumption, thereby expediting the transition toward carbon neutrality. Low carbon stand as pivotal imperatives for advanced industrial development, catapulting environmental protection and energy conservation into the forefront. China, as the globe's primary carbon emitter, aspires to achieve carbon neutrality by 2060. Industries such as paper and food processing are requiring high-temperature sources. Traditional methodologies reliant on fossil fuels or electric heating exhibit suboptimal energy efficiency and pose heightened emission challenges in meeting the high-temperature demands.

Therefore, vigorously developing and utilizing low-grade waste heat recovery technology in the future is an important way to achieve energy conservation and emission reduction. However, the recovery of low-grade waste heat is currently marred by several challenges, including complexities in recovery and utilization.

This study is aimed to confront these challenges by introducing Carnot battery technology, which can not only enhance the quality of waste heat but also improve its overall utilization. The Carnot battery stores electricity as thermal exergy, achieved by establishing a temperature difference between two thermal reservoirs during the charging process. The temperature difference is capable to drive a power cycle for electricity production during discharge. The study is chiefly centered on the design of an steam Carnot Battery based on high and low temperature phase change materials, with steam works as working fluid. This comprehensive system is consist of heat pumps, low-temperature thermal storage tanks, high-temperature thermal storage tanks, and heat engines.

The stable simulation models of the steam Carnot battery is established by the traditional thermodynamic analysis. Meanwhile, a commercial software Ebsilon is used to verified the accuracy of the stable simulation model. Furthermore, being oriented to a industrial scenario, a special steam Carnot battery is founded to meet the demands of the industrial park. As the steam Carnot battery stores heat by saturated water, not only does it can provide electricity through discharging cycle, but it can also supply steam at elevated temperatures, specifically around 260°C. Furthermore, performance indicators is studied by the stable simulation model. The special steam Carnot battery boasts a coefficient of performance of heat pump of 3.3 and a round-trip efficiency of 65%. The study plays a role in promoting the integration of renewable energy at the industrial park level and contributed to the sustainable development of the industrial sector and broader energy conservation goals.

Presenting Author: Xiaojie Lin Zhejiang University

Presenting Author Biography: 2021.2-present: College of Energy Engineering, Zhejiang University Associate researcher (in tenure-track)
2020.2-2021.2: Zhejiang University Changzhou Institute of Industrial Technology Senior expert
2018.3-2020.2: College of Energy Engineering, Zhejiang University Postdoctoral fellow
2012.8-2017.8: University of Maryland Ph.D

Working in modeling and control of multi-energy flow systems in industrial park integrated energy
Published 35 SCI/EI indexed papers as the first or corresponding author in the past three years
Received a third-class prize of Jiangsu Science and Technology Award.

National Key R&D Program of China ‘Joint Research and Demonstration Project on Collaborative Energy Management and Operational Optimization of National City Smart Energy Networks under the 'Belt and Road' Initiative’Core Member
National Key R&D Program of China ‘Modeling and Distributed Collaborative Control Methods for Energy Systems in Manufacturing Enterprise Clusters’Core Member

Authors:

Quan Zhao Zhejiang University
Xiaojie Lin Zhejiang University
Jiahao Xu Zhejiang University