Thermal-economic optimization of moving packed bed particle-to-SCO2heat exchanger using particle swarm optimization

Yanjie Zheng, Kelsey B. Hatzell

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Low cost (< $150 kWt-1) and high heat-transfer coefficient particle heat exchangers may enable high temperature operation of high efficiency power cycles (supercritical CO2/air Brayton) [1-3]. Currently, these heat exchangers are cost-prohibitive and require large surface areas due to ineffective particle-particle and particle-CO2 heat transfer. Particle heat transfer media are examples of complex material systems that can display a reconfigurable mesostructure during flow or shearing processes. This deformation or rearrangement in the underlying active material can cause a decrease in the thermal transport properties and limit the heat-transfer coefficient. For future adoption, it is critical that we gain a greater understanding of how local (particle-particle) thermophysical properties are affected by system architecture/design. Traditional heat exchanger optimization approaches are limited and often lead to non-feasible design approaches. Here, we employ a stochastic and evolutionary method, particle swarm optimization (PSO), to perform a multi-objective optimization for the particle-to-sCO2 shell-andplate heat exchanger for two state-of-the-art particulate materials (i.e., Accucast ID50K and CARBO HSP). The objective function for optimization considers the minimum payback period (economics), entropy generation (thermodynamics), and volume (engineering). The results suggest that Accucast ID50K is preferable for a packed bed heat exchanger from the perspective of minimizing payback period and volume, while at a larger entropy generation rate than CARBO HSP.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME 2021 15th International Conference on Energy Sustainability, ES 2021
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791884881
StatePublished - 2021
Externally publishedYes
EventASME 2021 15th International Conference on Energy Sustainability, ES 2021 - Virtual, Online
Duration: Jun 16 2021Jun 18 2021

Publication series

NameProceedings of the ASME 2021 15th International Conference on Energy Sustainability, ES 2021


ConferenceASME 2021 15th International Conference on Energy Sustainability, ES 2021
CityVirtual, Online

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology


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