Adopting Real Measurements to a Simulation Model for Indoor Temperature Increase at Reduced Cooling Power to Lower Power Peaks
(2023) 5th Central European Symposium on Building Physics 2022, CESBP 2022 In AIP Conference Proceedings 2918.- Abstract
Lately there has been an increasing focus on saving peak power in heating systems as a way to lower the environmental load past just saving energy. At the same time, active cooling is becoming increasingly interesting. Sweden has more and more cooling systems with an increase in cooling also in residential buildings. The cooling power is much more expensive than the heating power. Therefore, there is a relative advantage of reducing the cooling instead of heating power, and at the same time the traditional users are accepting over temperatures indoors more than if the temperature becomes too low. Buildings facing renovation as well as new construction will reduce the use of heating, while more cooling power will be needed to cover the... (More)
Lately there has been an increasing focus on saving peak power in heating systems as a way to lower the environmental load past just saving energy. At the same time, active cooling is becoming increasingly interesting. Sweden has more and more cooling systems with an increase in cooling also in residential buildings. The cooling power is much more expensive than the heating power. Therefore, there is a relative advantage of reducing the cooling instead of heating power, and at the same time the traditional users are accepting over temperatures indoors more than if the temperature becomes too low. Buildings facing renovation as well as new construction will reduce the use of heating, while more cooling power will be needed to cover the lack and future climate scenarios with warmer outdoor temperatures. In this study a simplified simulation model is proposed to simulate the increase in indoor temperature that will occur if cooling power is reduced or switched off to save peak power in the grid and supply system. Considered parameters include the thermal mass of the building and its interior, the heat transmittance, the windows, internal heat gains, ventilations losses and outdoor climate. The simplified model makes it possible to make parametric and Monte Carlo studies to show how the resulting temperature incline varies for different parameters and potential buildings as a foundation for energy companies to create new power control and business models. Results from the simulation model are presented for Swedish outdoor climate together with measurements in 9 buildings. An important conclusion of this study is that the cooling power of a building can be reduced or switched off for a surprisingly long time of up to hours without the indoor temperature rising more than 1 °C, but there is a large variation.
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- author
- Johansson, Dennis LU ; Fransson, Victor LU and Eldvall, Björn LU
- organization
- publishing date
- 2023-11-09
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- AIP Conference Proceedings
- series title
- AIP Conference Proceedings
- volume
- 2918
- edition
- 1
- conference name
- 5th Central European Symposium on Building Physics 2022, CESBP 2022
- conference location
- Bratislava, Slovakia
- conference dates
- 2022-09-05 - 2022-09-07
- external identifiers
-
- scopus:85177996757
- ISSN
- 0094-243X
- DOI
- 10.1063/5.0178347
- language
- English
- LU publication?
- yes
- id
- a5a52d54-1978-4af0-bc5d-b6858488fae9
- date added to LUP
- 2024-01-02 14:05:26
- date last changed
- 2024-01-31 10:35:15
@inproceedings{a5a52d54-1978-4af0-bc5d-b6858488fae9,
abstract = {{<p>Lately there has been an increasing focus on saving peak power in heating systems as a way to lower the environmental load past just saving energy. At the same time, active cooling is becoming increasingly interesting. Sweden has more and more cooling systems with an increase in cooling also in residential buildings. The cooling power is much more expensive than the heating power. Therefore, there is a relative advantage of reducing the cooling instead of heating power, and at the same time the traditional users are accepting over temperatures indoors more than if the temperature becomes too low. Buildings facing renovation as well as new construction will reduce the use of heating, while more cooling power will be needed to cover the lack and future climate scenarios with warmer outdoor temperatures. In this study a simplified simulation model is proposed to simulate the increase in indoor temperature that will occur if cooling power is reduced or switched off to save peak power in the grid and supply system. Considered parameters include the thermal mass of the building and its interior, the heat transmittance, the windows, internal heat gains, ventilations losses and outdoor climate. The simplified model makes it possible to make parametric and Monte Carlo studies to show how the resulting temperature incline varies for different parameters and potential buildings as a foundation for energy companies to create new power control and business models. Results from the simulation model are presented for Swedish outdoor climate together with measurements in 9 buildings. An important conclusion of this study is that the cooling power of a building can be reduced or switched off for a surprisingly long time of up to hours without the indoor temperature rising more than 1 °C, but there is a large variation.</p>}},
author = {{Johansson, Dennis and Fransson, Victor and Eldvall, Björn}},
booktitle = {{AIP Conference Proceedings}},
issn = {{0094-243X}},
language = {{eng}},
month = {{11}},
series = {{AIP Conference Proceedings}},
title = {{Adopting Real Measurements to a Simulation Model for Indoor Temperature Increase at Reduced Cooling Power to Lower Power Peaks}},
url = {{http://dx.doi.org/10.1063/5.0178347}},
doi = {{10.1063/5.0178347}},
volume = {{2918}},
year = {{2023}},
}