Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process
Abstract Pumped thermal energy storage (PTES) is a technology for intermediate storage of electrical energy in the form of thermal energy. In this work, PTES systems based on a transcritical CO2 charging process are investigated. A two‐zone water storage tank with a storage temperature of 115°C is u...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-09-01
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| Series: | Energy Science & Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ese3.1505 |
| _version_ | 1797689236099432448 |
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| author | Jonas Bodner Josefine Koksharov Frank Dammel Peter Stephan |
| author_facet | Jonas Bodner Josefine Koksharov Frank Dammel Peter Stephan |
| author_sort | Jonas Bodner |
| collection | DOAJ |
| description | Abstract Pumped thermal energy storage (PTES) is a technology for intermediate storage of electrical energy in the form of thermal energy. In this work, PTES systems based on a transcritical CO2 charging process are investigated. A two‐zone water storage tank with a storage temperature of 115°C is used as thermal energy storage. For discharge, an Organic Rankine Cycle (ORC) and, alternatively, a transcritical CO2 heat engine are investigated. The considered concepts are modelled and simulated as stationary processes using the EBSILON Professional software. The scaling is based on an electrical input power of 5 MW. Using an ORC with the working fluid R1234yf for the discharging process results in the highest round‐trip efficiency of 36.8%. The component costs of the different configurations are estimated using cost functions. On the basis of this, the levelized cost of storage (LCOS) is calculated. The configuration with the ORC as the discharging process has the lowest LCOS of 59.2 €cents (kWh)−1. In addition, the technological maturity is determined using the technology readiness level scale. There are no prototypes of the investigated PTES systems yet. Therefore, further investigations must be carried out to implement the technology in the future. |
| first_indexed | 2024-03-12T01:42:47Z |
| format | Article |
| id | doaj.art-c899a8edbe934052a81381c65d6c465c |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-03-12T01:42:47Z |
| publishDate | 2023-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-c899a8edbe934052a81381c65d6c465c2023-09-10T08:27:34ZengWileyEnergy Science & Engineering2050-05052023-09-011193289330610.1002/ese3.1505Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging processJonas Bodner0Josefine Koksharov1Frank Dammel2Peter Stephan3Institute for Technical Thermodynamics Technical University of Darmstadt Darmstadt GermanyInstitute for Technical Thermodynamics Technical University of Darmstadt Darmstadt GermanyInstitute for Technical Thermodynamics Technical University of Darmstadt Darmstadt GermanyInstitute for Technical Thermodynamics Technical University of Darmstadt Darmstadt GermanyAbstract Pumped thermal energy storage (PTES) is a technology for intermediate storage of electrical energy in the form of thermal energy. In this work, PTES systems based on a transcritical CO2 charging process are investigated. A two‐zone water storage tank with a storage temperature of 115°C is used as thermal energy storage. For discharge, an Organic Rankine Cycle (ORC) and, alternatively, a transcritical CO2 heat engine are investigated. The considered concepts are modelled and simulated as stationary processes using the EBSILON Professional software. The scaling is based on an electrical input power of 5 MW. Using an ORC with the working fluid R1234yf for the discharging process results in the highest round‐trip efficiency of 36.8%. The component costs of the different configurations are estimated using cost functions. On the basis of this, the levelized cost of storage (LCOS) is calculated. The configuration with the ORC as the discharging process has the lowest LCOS of 59.2 €cents (kWh)−1. In addition, the technological maturity is determined using the technology readiness level scale. There are no prototypes of the investigated PTES systems yet. Therefore, further investigations must be carried out to implement the technology in the future.https://doi.org/10.1002/ese3.1505CO2 heat pumpenergy storageOrganic Rankine Cyclepumped thermal energy storagetranscritical CO2 |
| spellingShingle | Jonas Bodner Josefine Koksharov Frank Dammel Peter Stephan Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process Energy Science & Engineering CO2 heat pump energy storage Organic Rankine Cycle pumped thermal energy storage transcritical CO2 |
| title | Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process |
| title_full | Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process |
| title_fullStr | Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process |
| title_full_unstemmed | Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process |
| title_short | Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process |
| title_sort | analysis of low temperature pumped thermal energy storage systems based on a transcritical co2 charging process |
| topic | CO2 heat pump energy storage Organic Rankine Cycle pumped thermal energy storage transcritical CO2 |
| url | https://doi.org/10.1002/ese3.1505 |
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