A Dual-Mode Hybrid System Combining Solar Thermal With Pumped Thermal Energy Storage
Journal Article
·
· Proceedings of SolarPACES 2023, 29th International Conference on Concentrating Solar Power, Thermal, and Chemical Energy Systems, 10-13 October 2023, Sydney, Australia
- National Laboratory of the Rockies, Golden, CO (United States)
A hybrid system that delivers renewable electricity generation and electricity storage capabilities is introduced. This dual-mode hybrid system is based on Pumped Thermal Energy Storage (PTES) which uses a heat pump to convert electricity into thermal energy that is trans-ferred to silica particles which are stored in concrete silos. The stored heat is later converted back to electricity in a heat engine. The heat pump and heat engine use a closed Joule-Brayton cycle and fluidized bed heat exchangers. If the PTES system is co-located with an array of concentrating solar mirrors and a particle receiver, then the silica particles may also be heated up by the concentrating solar power (CSP) system. The PTES heat engine may also be used to convert the stored solar heat into electricity, thereby sharing this system between the PTES and CSP systems and reducing costs. However, this requires careful management of the heat engine off-design parameters. A thermodynamic model is used to evaluate the performance of the dual mode PTES-CSP hybrid system. The model accounts for turbomachinery effi-ciency, and approach temperature and pressure loss in heat exchangers, as well as other sources of inefficiency, such as motor-generator losses, and air fan power. The hybrid system also requires the evaluation of the turbomachinery efficiency and pressure ratio at off-design conditions since the CSP system operates over different temperature ratios than the Carnot Battery. Several design variables and design modifications are investigated, such as pressure ratios and maximum temperatures.
- Research Organization:
- National Laboratory of the Rockies (NLR), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 3019333
- Report Number(s):
- NLR/CP-5700-87567
- Journal Information:
- Proceedings of SolarPACES 2023, 29th International Conference on Concentrating Solar Power, Thermal, and Chemical Energy Systems, 10-13 October 2023, Sydney, Australia, Journal Name: Proceedings of SolarPACES 2023, 29th International Conference on Concentrating Solar Power, Thermal, and Chemical Energy Systems, 10-13 October 2023, Sydney, Australia
- Publisher:
- Hannover, Germany: TIB Open Publishing
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analysis of pumped thermal energy storage using particle media integrated with concentrating solar power
A Pumped Thermal Energy Storage Cycle with Capacity for Concentrated Solar Power Integration
Pumped Thermal Energy Storage Using Low-Cost Particles and a Fluid Bed Heat Exchanger for Maximum Power Efficiency
Journal Article
·
Mon Mar 24 20:00:00 EDT 2025
· Solar Energy
·
OSTI ID:2558963
A Pumped Thermal Energy Storage Cycle with Capacity for Concentrated Solar Power Integration
Conference
·
Mon Oct 14 00:00:00 EDT 2019
·
OSTI ID:1575190
Pumped Thermal Energy Storage Using Low-Cost Particles and a Fluid Bed Heat Exchanger for Maximum Power Efficiency
Technical Report
·
Mon Mar 16 20:00:00 EDT 2026
·
OSTI ID:3024210