NZEB and market-based renovation case study of an existing office building

Helena Kuivjõgi; Jarek Kurnitski; Aivar Uutar; Martin Thalfeldt

doi:10.1051/e3sconf/202124605002

NZEB and market-based renovation case study of an existing office building

Helena Kuivjõgi^*
, Jarek Kurnitski
, Aivar Uutar
, Martin Thalfeldt

^*Corresponding author for this work

Tallinn University of Technology

Research output: Contribution to journal › Conference article › Scientific › peer-review

4 Citations (Scopus)

67 Downloads (Pure)

Abstract

The goal of decarbonizing the building stock in the EU requires a multi-fold increase of the current renovation rates. In Estonia, the non-residential building sector has had little or no public support to improve the energy efficiency. Therefore, it is essential to study the energy efficient and cost-optimal measures for non-residential building renovation to give guidance to real estate companies and other stakeholders about the renovation alternatives. Furthermore, crucial is to provide input to the government to develop the renovation grant and incentives for renovation. In this study, energy renovation measures and savings to improve the energy performance to NZEB level were identified in a large (16 990 m2 heated area) office building. For that purpose, energy use was measured, simulation model developed and calibrated, feasible and more comprehensive energy improvements and costs analysed. The improvement of lighting, AHU, heating, installation of a 69 kW PV system, and window replacement was needed to achieve the goal with a primary energy use of 163 kWh/m2. However, some of the applied measures had long payback times of 40-70 years and are not realistic to be implemented without renovation incentives.

Original language	English
Article number	05002
Number of pages	7
Journal	E3S Web of Conferences
Volume	246
DOIs	https://doi.org/10.1051/e3sconf/202124605002
Publication status	Published - 29 Mar 2021
MoE publication type	A4 Conference publication
Event	International Cold Climate HVAC Conference - Tallinn, Estonia Duration: 18 Apr 2021 → 21 Apr 2021

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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10.1051/e3sconf/202124605002

e3sconf_hvac2021_05002Final published version, 254 KBLicence: CC BY

Cite this

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title = "NZEB and market-based renovation case study of an existing office building",

abstract = "The goal of decarbonizing the building stock in the EU requires a multi-fold increase of the current renovation rates. In Estonia, the non-residential building sector has had little or no public support to improve the energy efficiency. Therefore, it is essential to study the energy efficient and cost-optimal measures for non-residential building renovation to give guidance to real estate companies and other stakeholders about the renovation alternatives. Furthermore, crucial is to provide input to the government to develop the renovation grant and incentives for renovation. In this study, energy renovation measures and savings to improve the energy performance to NZEB level were identified in a large (16 990 m2 heated area) office building. For that purpose, energy use was measured, simulation model developed and calibrated, feasible and more comprehensive energy improvements and costs analysed. The improvement of lighting, AHU, heating, installation of a 69 kW PV system, and window replacement was needed to achieve the goal with a primary energy use of 163 kWh/m2. However, some of the applied measures had long payback times of 40-70 years and are not realistic to be implemented without renovation incentives.",

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AU - Kuivjõgi, Helena

AU - Kurnitski, Jarek

AU - Uutar, Aivar

AU - Thalfeldt, Martin

PY - 2021/3/29

Y1 - 2021/3/29

N2 - The goal of decarbonizing the building stock in the EU requires a multi-fold increase of the current renovation rates. In Estonia, the non-residential building sector has had little or no public support to improve the energy efficiency. Therefore, it is essential to study the energy efficient and cost-optimal measures for non-residential building renovation to give guidance to real estate companies and other stakeholders about the renovation alternatives. Furthermore, crucial is to provide input to the government to develop the renovation grant and incentives for renovation. In this study, energy renovation measures and savings to improve the energy performance to NZEB level were identified in a large (16 990 m2 heated area) office building. For that purpose, energy use was measured, simulation model developed and calibrated, feasible and more comprehensive energy improvements and costs analysed. The improvement of lighting, AHU, heating, installation of a 69 kW PV system, and window replacement was needed to achieve the goal with a primary energy use of 163 kWh/m2. However, some of the applied measures had long payback times of 40-70 years and are not realistic to be implemented without renovation incentives.

AB - The goal of decarbonizing the building stock in the EU requires a multi-fold increase of the current renovation rates. In Estonia, the non-residential building sector has had little or no public support to improve the energy efficiency. Therefore, it is essential to study the energy efficient and cost-optimal measures for non-residential building renovation to give guidance to real estate companies and other stakeholders about the renovation alternatives. Furthermore, crucial is to provide input to the government to develop the renovation grant and incentives for renovation. In this study, energy renovation measures and savings to improve the energy performance to NZEB level were identified in a large (16 990 m2 heated area) office building. For that purpose, energy use was measured, simulation model developed and calibrated, feasible and more comprehensive energy improvements and costs analysed. The improvement of lighting, AHU, heating, installation of a 69 kW PV system, and window replacement was needed to achieve the goal with a primary energy use of 163 kWh/m2. However, some of the applied measures had long payback times of 40-70 years and are not realistic to be implemented without renovation incentives.

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DO - 10.1051/e3sconf/202124605002

M3 - Conference article

AN - SCOPUS:85103546208

SN - 2267-1242

VL - 246

JO - E3S Web of Conferences

JF - E3S Web of Conferences

M1 - 05002

T2 - International Cold Climate HVAC Conference

Y2 - 18 April 2021 through 21 April 2021

ER -

NZEB and market-based renovation case study of an existing office building

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-: FINEST TWINS GA856602Nieminen

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NZEB and market-based renovation case study of an existing office building

Abstract

UN SDGs

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-: FINEST TWINS GA856602Nieminen

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