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Numerical analysis of a combined heat pump ice energy storage system without solar benefit : Analytical validation and comparison with long term experimental data over one year

Title data

Griesbach, Marco ; König-Haagen, Andreas ; Brüggemann, Dieter:
Numerical analysis of a combined heat pump ice energy storage system without solar benefit : Analytical validation and comparison with long term experimental data over one year.
In: Applied Thermal Engineering. Vol. 213 (2022) . - No. 118696.
ISSN 1359-4311
DOI: https://doi.org/10.1016/j.applthermaleng.2022.118696

Abstract in another language

Ice energy storage systems, as interface between the time-shifted occurring heat and cold demand of nonresidential buildings, are a promising technology to use waste heat arising inside buildings. Several studies examine the suitability for residential buildings in combination with solar thermal power. However, investigations of ice energy storage systems for nonresidential buildings to use waste heat instead of solar benefit are missing. In order to design, evaluate and optimize such systems, analysis of its behavior by means of variational calculations are essential, which requires an adaptable model that is thoroughly validated. Therefore, for the first time, a detailed numerical model of such a system is developed, validated and compared to long term measured data of a 500 m3 setup. The storage at the University of Bayreuth acts as heat source for a heat pump and is regenerated by the cooling water network delivering the waste heat, which can also be used as a direct source for the heat pump. The Stefan problem is utilized to conduct the validation and, moreover, a comparison with 13 months of measured data shows good agreement. In the future, the model will be used to identify favorable procedures for implementing, optimizing and controlling ice energy storage systems in nonresidential buildings with waste heat recovery capability.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Engineering Thermodynamics and Transport Processes
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions > Affiliated Institutes > TechnologieAllianzOberfranken (TAO)
Graduate Schools > TAO-Graduiertenkolleg Energieautarke Gebäude
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 03 Jun 2022 10:08
Last Modified: 03 Jun 2022 10:08
URI: https://eref.uni-bayreuth.de/id/eprint/69937