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Optimized energy recovery in line with balancing of an ATES
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0002-9902-2087
2014 (English)In: American Society of Mechanical Engineers, Power Division (Publication) POWER, 2014, Vol. 2Conference paper, Published paper (Refereed)
Abstract [en]

The present study explores the potential imbalance problem of the Aquifer Thermal Energy Storage (ATES) system at the Eindhoven University of Technology (TU/e) campus, Eindhoven. This ATES is one of the largest European aquifer thermal energy storage systems, and has a seasonal imbalance problem. Reasons for this issue may be the high cooling demand from laboratories, office buildings and the direct ATES cooling system. Annually, cooling towers use on average 250 MWh electricity for the removal of about 5 GWh of excess heat from the ATES to the surroundings. In addition, the TU/e uses a large amount of natural gas for heating purposes and especially for peak supplies. Recovering the surplus heat of the ATES, a CO2 Trans-critical Heat Pump (HP) system to cover particularly peak demands and total heating demand is proposed, modeled and optimized. The model is validated using data from International Energy Agency. Based on simulation results, 708294 nm3 of natural gas are saved where two different scenarios were considered for the ATES efficiency, cost saving and green house gas reduction. In scenario I, the COP of the ATES increased up to 50% by which K€ 303.3 energy cost and 1288.5 ton CO2 are saved annually. On the other hand, it will be shown that the ATES COP in Scenario II will improve up to 20%. In addition, the proposed energy recovery system results in a 606 ton CO2 -reduction and K€152.7 energy cost saving for the university each year.

Place, publisher, year, edition, pages
2014. Vol. 2
Keyword [en]
Aquifers; Carbon dioxide; Cooling; Cost reduction; Design; Digital storage; Electric energy storage; Greenhouse gases; Heat storage; Heating; Natural gas; Office buildings; Recovery; Thermal energy, Aquifer thermal energy storage; Eindhoven University of Technology; Energy cost savings; Energy recovery; Energy recovery system; Heating demand; Imbalance problem; International energy agency, Geothermal energy
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-168118DOI: 10.1115/POWER2014-32017ISI: 000361161100008Scopus ID: 2-s2.0-84911975007OAI: oai:DiVA.org:kth-168118DiVA: diva2:816094
Conference
ASME 2014 Power Conference, POWER 2014; Baltimore; United States
Note

QC 20150602

Available from: 2015-06-02 Created: 2015-05-27 Last updated: 2015-10-05Bibliographically approved

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Palm, Björn E.

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  • apa
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