Parametric Analysis of Greenhouse Gas Emissions of the Technical Building System Alternatives in Detached Houses Retrofitted to nZEB Level

László Zsolt Gergely, Tamás Csoknyai

2021

Abstract

Buildings account for a significant part of greenhouse gas emissions. A reasonable way of mitigation is the retrofit of the building stock, both from the perspective of the building envelope and the technical building system. However, to maximize carbon emission savings, effects of these two measures shall be observed hand in hand. This paper approaches the issue through the possible renovation of the detached houses of the Hungarian residential building stock to a nearly zero energy building (NZEB) level. Three system layouts, namely air-to-water heat pumps, air-to-air heat pumps with electric boilers and gas condensing boilers are compared in terms of greenhouse gas emissions while covering heating and domestic hot water demands. Results reflect that heat pumps offer the possibility of a remarkable reduction of carbon-dioxide emissions compared to condensing gas boilers in case of the present electricity mix of Hungary. Furthermore, it appears that after the NZEB renovation, air-to-water heat pumps represent the best solution for detached houses. In the meanwhile, air-to-air heat pumps with electric boilers could remain eco-friendly for applications with relatively low hot water needs.

Paper Citation

in Harvard Style

Gergely L. and Csoknyai T. (2021). Parametric Analysis of Greenhouse Gas Emissions of the Technical Building System Alternatives in Detached Houses Retrofitted to nZEB Level. In Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE, ISBN 978-989-758-560-9, pages 231-239

in Bibtex Style

@conference{wre21,
author={László Zsolt Gergely and Tamás Csoknyai},
title={Parametric Analysis of Greenhouse Gas Emissions of the Technical Building System Alternatives in Detached Houses Retrofitted to nZEB Level},
booktitle={Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE,},
year={2021},
pages={231-239},
publisher={SciTePress},
organization={INSTICC},
doi={},
isbn={978-989-758-560-9},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE,
TI - Parametric Analysis of Greenhouse Gas Emissions of the Technical Building System Alternatives in Detached Houses Retrofitted to nZEB Level
SN - 978-989-758-560-9
AU - Gergely L.
AU - Csoknyai T.
PY - 2021
SP - 231
EP - 239
DO -