Numerical investigation of the energy flexibility of different heating and cooling systems

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Abstract

The significant expansion of intermittent renewable energy sources can compromise the stability of energy grids due to the mismatch between instantaneous energy use and production. Buildings have a large potential for energy storage and demand-side management, which can offer energy flexibility to a Smart Grid system. Smart control of heating, ventilation and air conditioning systems is a great solution for improving flexible energy use, load shifting and power peak shaving. This numerical study compares the energy flexibility potential of three different heating and cooling systems implemented in a nearly zero-energy office building. The energy flexibility strategy consists in the modulation of heating / cooling indoor temperature set points according to an energy price signal. The energy flexibility assessment was performed based on the energy shifting ability, indoor thermal comfort level and economic benefits. This article establishes a better understanding of the flexibility potential of common and innovative heating / cooling technologies. Lindab Solus system has the highest load shifting ability with a flexibility index of 67.41%, followed by the radiator heating system, scoring a 59.92%, and the underfloor heating system with 56.65%. It is clear that the selection between different heating/ cooling systems can have a great impact on the energy flexibility of the grid system.
Original languageEnglish
Title of host publicationCLIMA 2019 conference
Publication date2019
DOIs
Publication statusPublished - 2019
EventCLIMA 2019: REHVA 13th HVAC World Congress - Bucharest, Romania
Duration: 26 May 201929 May 2019
Conference number: 13

Conference

ConferenceCLIMA 2019
Number13
CountryRomania
CityBucharest
Period26/05/201929/05/2019

Fingerprint

Cooling systems
Heating
Cooling
Thermal comfort
Office buildings
Radiators
Potential energy
Air conditioning
Energy storage
Ventilation
Modulation
Economics

Keywords

  • Building energy flexibility

Cite this

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title = "Numerical investigation of the energy flexibility of different heating and cooling systems",
abstract = "The significant expansion of intermittent renewable energy sources can compromise the stability of energy grids due to the mismatch between instantaneous energy use and production. Buildings have a large potential for energy storage and demand-side management, which can offer energy flexibility to a Smart Grid system. Smart control of heating, ventilation and air conditioning systems is a great solution for improving flexible energy use, load shifting and power peak shaving. This numerical study compares the energy flexibility potential of three different heating and cooling systems implemented in a nearly zero-energy office building. The energy flexibility strategy consists in the modulation of heating / cooling indoor temperature set points according to an energy price signal. The energy flexibility assessment was performed based on the energy shifting ability, indoor thermal comfort level and economic benefits. This article establishes a better understanding of the flexibility potential of common and innovative heating / cooling technologies. Lindab Solus system has the highest load shifting ability with a flexibility index of 67.41{\%}, followed by the radiator heating system, scoring a 59.92{\%}, and the underfloor heating system with 56.65{\%}. It is clear that the selection between different heating/ cooling systems can have a great impact on the energy flexibility of the grid system.",
keywords = "Building energy flexibility",
author = "Evangelia Loukou and Mingzhe Liu and Hicham Johra and Per Heiselberg",
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Numerical investigation of the energy flexibility of different heating and cooling systems. / Loukou, Evangelia; Liu, Mingzhe; Johra, Hicham; Heiselberg, Per.

CLIMA 2019 conference. 2019.

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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AU - Loukou, Evangelia

AU - Liu, Mingzhe

AU - Johra, Hicham

AU - Heiselberg, Per

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AB - The significant expansion of intermittent renewable energy sources can compromise the stability of energy grids due to the mismatch between instantaneous energy use and production. Buildings have a large potential for energy storage and demand-side management, which can offer energy flexibility to a Smart Grid system. Smart control of heating, ventilation and air conditioning systems is a great solution for improving flexible energy use, load shifting and power peak shaving. This numerical study compares the energy flexibility potential of three different heating and cooling systems implemented in a nearly zero-energy office building. The energy flexibility strategy consists in the modulation of heating / cooling indoor temperature set points according to an energy price signal. The energy flexibility assessment was performed based on the energy shifting ability, indoor thermal comfort level and economic benefits. This article establishes a better understanding of the flexibility potential of common and innovative heating / cooling technologies. Lindab Solus system has the highest load shifting ability with a flexibility index of 67.41%, followed by the radiator heating system, scoring a 59.92%, and the underfloor heating system with 56.65%. It is clear that the selection between different heating/ cooling systems can have a great impact on the energy flexibility of the grid system.

KW - Building energy flexibility

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