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Reduced-order models for assessing demand response with heat pumps – Insights from the German energy system

Sperber, Evelyn and Frey, Ulrich and Bertsch, Valentin (2020) Reduced-order models for assessing demand response with heat pumps – Insights from the German energy system. Energy and Buildings (223). Elsevier. doi: 10.1016/j.enbuild.2020.110144. ISSN 0378-7788.

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Heat pumps are regarded as one promising option for Demand Response (DR) in renewable-dominated energy systems. By activating the structural thermal mass of buildings, power consumption of heat pumps can be decoupled from heat demand. Assessing the system-wide DR potential from heat pumps requires adequate models to account for the thermal response of the building stock to flexible operation. In this study, reduced-order thermal response models of twelve representative German building types in three insulation states are provided based on grey-box modeling. The identified models reveal a good compromise between accuracy of the simulated indoor temperature (RMSE of on average 0.6 °C) and computational cost (acceleration by factor 250) compared to the complex building simulation software TRNSYS. Furthermore, these reduced-order models are employed in a case study to estimate the technical DR potential of heat pumps by passive storage at specified ambient conditions. Extrapolated to the future stock of German single family houses, the maximum shiftable heat pump load adds up to 57 GWel. The structural thermal mass of the building stock enables maximal 300 GWhel of electrical energy to be discharged at a very cold winter day and 185 GWhel to be charged at milder temperatures.

Item URL in elib:https://elib.dlr.de/135108/
Document Type:Article
Title:Reduced-order models for assessing demand response with heat pumps – Insights from the German energy system
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Sperber, EvelynEvelyn.Sperber (at) dlr.dehttps://orcid.org/0000-0001-9093-5042
Frey, UlrichUlrich.Frey (at) dlr.deUNSPECIFIED
Bertsch, ValentinUniversity of BochumUNSPECIFIED
Journal or Publication Title:Energy and Buildings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.enbuild.2020.110144
Keywords:Demand response; Heat pumps; Passive storage; Grey-box modeling; Reduced-order models
HGF - Research field:Energy
HGF - Program:Technology, Innovation and Society
HGF - Program Themes:Renewable Energy and Material Resources for Sustainable Futures - Integrating at Different Scales
DLR - Research area:Energy
DLR - Program:E SY - Energy Systems Analysis
DLR - Research theme (Project):E - Systems Analysis and Technology Assessment (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Energy Systems Analysis
Deposited By: Sperber, Evelyn
Deposited On:09 Jun 2020 12:33
Last Modified:09 Jun 2020 12:33

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