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Model-based Assessment of Heat Pump Flexibility
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. (Built Environment Energy Systems Group (BEESG))
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Today's energy production is changing from scheduled to intermittent generation due to the increasing energy injection from renewable sources. This alteration requires flexibility in energy generation and demand. Electric heat pumps and thermal storages were found to have a large potential to provide demand flexibility which is analysed in this work. A three-fold method is set up to generate thermal load profiles, to simulate heat pump pools and to assess heat pump flexibility. The thermal profile generation based on a combination of physical and behavioural models is successfully validated against measurement data. A randomised system sizing procedure was implemented for the simulation of heat pump pools. The parameter randomisation yields correct seasonal performance factors, full load hours and average operation cycles per day compared to 87 monitored systems. The flexibility assessment analysis the electric load deviation of representative heat pump pool in response to 5 different on / off signals. The flexibility is induced by the capacity of thermal storages and analysed by four parameters. Generally, on signals are more powerful than off signals. A generic assessment by the ambient temperature yield that the flexibility is highest for heating days and the activated additional space heating storage: Superheating of the storage to the maximal temperature provides a flexible energy of more than 400 kWh per 100 heat pumps in a temperature range between -10 and +13 °C.

Place, publisher, year, edition, pages
2016. , 77 p.
Keyword [en]
Heat pump pool model, Thermal storage, Stochastic building model, Flexibility
National Category
Energy Engineering
URN: urn:nbn:se:uu:diva-284083OAI: oai:DiVA.org:uu-284083DiVA: diva2:919753
External cooperation
Fraunhofer Institute of Solar Energy Systems, Freiburg
Educational program
Master Programme in Energy Technology
via Adobe Connect (English)
Available from: 2016-05-11 Created: 2016-04-14 Last updated: 2016-05-11Bibliographically approved

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