Heating system energy flexibility of low-energy residential buildings

Kyriaki Foteinaki*, Rongling Li, Alfred Heller, Carsten Rode

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Energy flexibility is proposed as a cost-effective solution facilitating secure operation of the energy system while integrating large share of renewables. With strict building regulations in Denmark, newly built buildings are low-energy buildings. In order to identify the role of low-energy buildings in the energy system, we investigated the physical potential for flexibility and analysed the thermal storage capacity existing inherently in the structural mass. Two building types were studied: single-family house and apartment block. The aim is to quantify the energy that can be added to or curtailed from each building during a time period without compromising thermal comfort. Different scenarios (starting time and duration), building design characteristics and boundary conditions were studied. The findings showed that low-energy buildings are highly robust and can remain autonomous for several hours. Although for individual buildings the available energy for curtailment is limited, if many buildings are aggregated energy flexibility becomes significant. The potential for storage in the thermal mass is considerable. The analysis presented high dependence of flexibility potential on boundary conditions (ambient temperature, solar radiation, internal gains) and underlined the importance of envelope insulation. Heat losses govern the potential for flexibility, while the walls’ thermal mass has a secondary influence.
Original languageEnglish
JournalEnergy and Buildings
Volume180
Pages (from-to)95-108
ISSN0378-7788
DOIs
Publication statusPublished - 2018

Keywords

  • Energy flexibility
  • Building thermal mass
  • Thermal energy storage
  • Low-energy building
  • Demand response

Cite this

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title = "Heating system energy flexibility of low-energy residential buildings",
abstract = "Energy flexibility is proposed as a cost-effective solution facilitating secure operation of the energy system while integrating large share of renewables. With strict building regulations in Denmark, newly built buildings are low-energy buildings. In order to identify the role of low-energy buildings in the energy system, we investigated the physical potential for flexibility and analysed the thermal storage capacity existing inherently in the structural mass. Two building types were studied: single-family house and apartment block. The aim is to quantify the energy that can be added to or curtailed from each building during a time period without compromising thermal comfort. Different scenarios (starting time and duration), building design characteristics and boundary conditions were studied. The findings showed that low-energy buildings are highly robust and can remain autonomous for several hours. Although for individual buildings the available energy for curtailment is limited, if many buildings are aggregated energy flexibility becomes significant. The potential for storage in the thermal mass is considerable. The analysis presented high dependence of flexibility potential on boundary conditions (ambient temperature, solar radiation, internal gains) and underlined the importance of envelope insulation. Heat losses govern the potential for flexibility, while the walls’ thermal mass has a secondary influence.",
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author = "Kyriaki Foteinaki and Rongling Li and Alfred Heller and Carsten Rode",
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language = "English",
volume = "180",
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journal = "Energy and Buildings",
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Heating system energy flexibility of low-energy residential buildings. / Foteinaki, Kyriaki; Li, Rongling; Heller, Alfred; Rode, Carsten.

In: Energy and Buildings, Vol. 180, 2018, p. 95-108.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Heating system energy flexibility of low-energy residential buildings

AU - Foteinaki, Kyriaki

AU - Li, Rongling

AU - Heller, Alfred

AU - Rode, Carsten

PY - 2018

Y1 - 2018

N2 - Energy flexibility is proposed as a cost-effective solution facilitating secure operation of the energy system while integrating large share of renewables. With strict building regulations in Denmark, newly built buildings are low-energy buildings. In order to identify the role of low-energy buildings in the energy system, we investigated the physical potential for flexibility and analysed the thermal storage capacity existing inherently in the structural mass. Two building types were studied: single-family house and apartment block. The aim is to quantify the energy that can be added to or curtailed from each building during a time period without compromising thermal comfort. Different scenarios (starting time and duration), building design characteristics and boundary conditions were studied. The findings showed that low-energy buildings are highly robust and can remain autonomous for several hours. Although for individual buildings the available energy for curtailment is limited, if many buildings are aggregated energy flexibility becomes significant. The potential for storage in the thermal mass is considerable. The analysis presented high dependence of flexibility potential on boundary conditions (ambient temperature, solar radiation, internal gains) and underlined the importance of envelope insulation. Heat losses govern the potential for flexibility, while the walls’ thermal mass has a secondary influence.

AB - Energy flexibility is proposed as a cost-effective solution facilitating secure operation of the energy system while integrating large share of renewables. With strict building regulations in Denmark, newly built buildings are low-energy buildings. In order to identify the role of low-energy buildings in the energy system, we investigated the physical potential for flexibility and analysed the thermal storage capacity existing inherently in the structural mass. Two building types were studied: single-family house and apartment block. The aim is to quantify the energy that can be added to or curtailed from each building during a time period without compromising thermal comfort. Different scenarios (starting time and duration), building design characteristics and boundary conditions were studied. The findings showed that low-energy buildings are highly robust and can remain autonomous for several hours. Although for individual buildings the available energy for curtailment is limited, if many buildings are aggregated energy flexibility becomes significant. The potential for storage in the thermal mass is considerable. The analysis presented high dependence of flexibility potential on boundary conditions (ambient temperature, solar radiation, internal gains) and underlined the importance of envelope insulation. Heat losses govern the potential for flexibility, while the walls’ thermal mass has a secondary influence.

KW - Energy flexibility

KW - Building thermal mass

KW - Thermal energy storage

KW - Low-energy building

KW - Demand response

U2 - 10.1016/j.enbuild.2018.09.030

DO - 10.1016/j.enbuild.2018.09.030

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VL - 180

SP - 95

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JO - Energy and Buildings

JF - Energy and Buildings

SN - 0378-7788

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