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Part Load Capability of a High Temperature Heat Pump with Reversed Brayton Cycle

Oehler, Johannes and Gollasch, Jens Oliver and Tran, A. Phong and Nicke, Eberhard (2021) Part Load Capability of a High Temperature Heat Pump with Reversed Brayton Cycle. In: 13th IEA Heat Pump Conference 2021 (HPC2020) Conference Proceedings. 13th IEA Heat Pump Conference, 2021-04-26 - 2021-04-29, Jeju, Korea.

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Official URL: https://heatpumpingtechnologies.org/publications/paper-no-340-part-load-capability-of-a-high-temperature-heat-pump-withreversed-brayton-cycle-13th-iea-heat-pump-conference-jeju-korea/


This paper studies the part load behavior and capability of a high temperature heat pump that operates with the Brayton cycle. A novel concept of a high temperature heat pump which is currently under construction in Cottbus (Germany) is presented. It goes far beyond temperature levels of current high temperature heat pumps and will provide process heat at above 250 °C. The heat pump uses a closed Brayton cycle driven by axial turbomachinery and provides up to 200 kW of thermal energy. The thermal output can be adjusted by variation of compressor shaft speed, use of internal recuperation and additionally by variation of the fluid inventory. The latter allows operation of our prototype within a broad part load range down to 25 % of the nominal power at nearly constant efficiencies and output temperatures. Brayton cycle heat pumps can be adapted to a wide range of industrial processes and enable highly efficient thermal energy storage systems to balance grid fluctuations.

Item URL in elib:https://elib.dlr.de/145225/
Document Type:Conference or Workshop Item (Speech)
Title:Part Load Capability of a High Temperature Heat Pump with Reversed Brayton Cycle
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Oehler, JohannesUNSPECIFIEDhttps://orcid.org/0000-0001-6226-5328UNSPECIFIED
Tran, A. PhongUNSPECIFIEDhttps://orcid.org/0000-0002-3365-5500UNSPECIFIED
Date:31 August 2021
Journal or Publication Title:13th IEA Heat Pump Conference 2021 (HPC2020) Conference Proceedings
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:high temperature heat pump; reverse Brayton cycle; fluid inventory control; process heat; electrification
Event Title:13th IEA Heat Pump Conference
Event Location:Jeju, Korea
Event Type:international Conference
Event Start Date:26 April 2021
Event End Date:29 April 2021
Organizer:International Energy Acency
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Low-Carbon Industrial Processes
Location: Cottbus
Institutes and Institutions:Institute of Low-Carbon Industrial Processes > High-Temperature Heat Pumps
Institute of Low-Carbon Industrial Processes > Simulation and Virtual Design
Deposited By: Oehler, Johannes
Deposited On:22 Nov 2021 16:03
Last Modified:24 Apr 2024 20:44

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