Impact of The Time Step Calculation On The Energy Performance Of Buildings

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Impact of The Time Step Calculation On The Energy Performance Of Buildings

Popis výsledku v původním jazyce

The European Union's climate and energy policy has set up a series of objectives, for which reducing the energy performance of buildings plays a key role. Proper energy savings evaluation is an important chapter in this effort. According to Annex V to the Energy Efficiency Directive, one of the recognized methods for the evaluation of the impact of energy saving measures as well as in the design of new buildings is the ex-ante method. The ex-ante method is based on a theoretical calculation of the energy performance of the building and the determination of its future energy consumption. In the Czech Republic, the calculation with monthly steps was almost exclusively has been used until the end of 2022, but from the beginning of 2023 the calculation with hourly steps is in place. The aim of this work is to compare and analyze the differences that arise when calculating the energy performance of a building using monthly and hourly time steps, and to determine its impact on the possible achievement of energy consumption reduction targets and future planned energy efficiency requirements. The calculation is performed on selected building model based on the case study of the real planned residential project of new positive energy district using calculation software. The differences between hourly and monthly steps are then analyzed. The study results show a significant dependence of the resulting building theoretical energy balance on the climate and operational inputs used in the calculation. The hourly step has proven to be more accurate compared to the monthly step, better reflecting the flexibility of building use, but is highly dependent on the correct setting of operational input parameters and in the case of the design of new buildings, where design optimization is required, significantly increases the processing time.

Název v anglickém jazyce

Impact of The Time Step Calculation On The Energy Performance Of Buildings

Popis výsledku anglicky

The European Union's climate and energy policy has set up a series of objectives, for which reducing the energy performance of buildings plays a key role. Proper energy savings evaluation is an important chapter in this effort. According to Annex V to the Energy Efficiency Directive, one of the recognized methods for the evaluation of the impact of energy saving measures as well as in the design of new buildings is the ex-ante method. The ex-ante method is based on a theoretical calculation of the energy performance of the building and the determination of its future energy consumption. In the Czech Republic, the calculation with monthly steps was almost exclusively has been used until the end of 2022, but from the beginning of 2023 the calculation with hourly steps is in place. The aim of this work is to compare and analyze the differences that arise when calculating the energy performance of a building using monthly and hourly time steps, and to determine its impact on the possible achievement of energy consumption reduction targets and future planned energy efficiency requirements. The calculation is performed on selected building model based on the case study of the real planned residential project of new positive energy district using calculation software. The differences between hourly and monthly steps are then analyzed. The study results show a significant dependence of the resulting building theoretical energy balance on the climate and operational inputs used in the calculation. The hourly step has proven to be more accurate compared to the monthly step, better reflecting the flexibility of building use, but is highly dependent on the correct setting of operational input parameters and in the case of the design of new buildings, where design optimization is required, significantly increases the processing time.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Construction Maeconomics Conference (2023), Conference Proceedings

ISBN

978-80-01-07258-5

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

52-61

Název nakladatele

České vysoké učení technické v Praze

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

2. 11. 2023

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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