On the operational characteristics and economic value of pumped thermal energy storage
Abstract
Pumped thermal energy storage (PTES) systems use an electrically-driven heat pump to store electricity in the form of thermal energy, and subsequently dispatch the stored thermal energy to generate electricity using a thermodynamic heat engine. Optimal day-ahead operational scheduling and annual value of a PTES system based on Joule-Brayton thermodynamic cycles and two-tank molten salt hot thermal storage is evaluated in this work. Production cost models, which simultaneously optimize commitment and dispatch schedules for an entire set of generators to minimize the cost of satisfying electricity demand, are employed to determine system-optimal operation and day-ahead energy value of the PTES system within each of six hypothetical near-future grid scenarios intended to approximately represent the U.S. Western Interconnection or the Texas Interconnection. Sensitivity to grid scenario (including the contribution of variable renewable energy sources), thermal storage capacity, relative heat pump and heat engine capacities, and startup/shutdown cycling costs are evaluated. PTES energy value and heat engine annual capacity factor increase strongly as the contribution of variable renewable resources increases, heat pump capacity increases relative to heat engine capacity, or PTES cycling costs decrease. Grid scenarios in which the contribution of variable renewable energy is dominated by solar photovoltaics (PV) vs. windmore »
- Authors:
-
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
- OSTI Identifier:
- 1874943
- Report Number(s):
- NREL/JA-5700-81640
Journal ID: ISSN 2352-152X; MainId:82413;UUID:15e5d951-e22d-45dc-b1d3-0e747524cdde;MainAdminID:64785
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Energy Storage
- Additional Journal Information:
- Journal Volume: 52; Journal Issue: Part C; Journal ID: ISSN 2352-152X
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; 24 POWER TRANSMISSION AND DISTRIBUTION; dispatch optimization; electricity storage; grid integration; pumped thermal energy storage
Citation Formats
Martinek, Janna, Jorgenson, Jennie L., and McTigue, Joshua D. On the operational characteristics and economic value of pumped thermal energy storage. United States: N. p., 2022.
Web. doi:10.1016/j.est.2022.105005.
Martinek, Janna, Jorgenson, Jennie L., & McTigue, Joshua D. On the operational characteristics and economic value of pumped thermal energy storage. United States. https://doi.org/10.1016/j.est.2022.105005
Martinek, Janna, Jorgenson, Jennie L., and McTigue, Joshua D. Tue .
"On the operational characteristics and economic value of pumped thermal energy storage". United States. https://doi.org/10.1016/j.est.2022.105005. https://www.osti.gov/servlets/purl/1874943.
@article{osti_1874943,
title = {On the operational characteristics and economic value of pumped thermal energy storage},
author = {Martinek, Janna and Jorgenson, Jennie L. and McTigue, Joshua D.},
abstractNote = {Pumped thermal energy storage (PTES) systems use an electrically-driven heat pump to store electricity in the form of thermal energy, and subsequently dispatch the stored thermal energy to generate electricity using a thermodynamic heat engine. Optimal day-ahead operational scheduling and annual value of a PTES system based on Joule-Brayton thermodynamic cycles and two-tank molten salt hot thermal storage is evaluated in this work. Production cost models, which simultaneously optimize commitment and dispatch schedules for an entire set of generators to minimize the cost of satisfying electricity demand, are employed to determine system-optimal operation and day-ahead energy value of the PTES system within each of six hypothetical near-future grid scenarios intended to approximately represent the U.S. Western Interconnection or the Texas Interconnection. Sensitivity to grid scenario (including the contribution of variable renewable energy sources), thermal storage capacity, relative heat pump and heat engine capacities, and startup/shutdown cycling costs are evaluated. PTES energy value and heat engine annual capacity factor increase strongly as the contribution of variable renewable resources increases, heat pump capacity increases relative to heat engine capacity, or PTES cycling costs decrease. Grid scenarios in which the contribution of variable renewable energy is dominated by solar photovoltaics (PV) vs. wind produce inherently different PTES operational patterns. Annual PTES energy value within PV-dominated scenarios increased with storage capacity only up to approximately seven hours of full-load discharge capacity, whereas that within wind-dominated scenarios exhibited a continual increase with storage duration up to at least 16 hours.},
doi = {10.1016/j.est.2022.105005},
journal = {Journal of Energy Storage},
number = Part C,
volume = 52,
place = {United States},
year = {Tue Jun 14 00:00:00 EDT 2022},
month = {Tue Jun 14 00:00:00 EDT 2022}
}
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