Heat Loss for a Run-Around Hybrid Ventilation System with Heat Recovery
Davidsson, Henrik LU and Bernardo, Ricardo LU
(2015)
International Solar Energy Society, ISES Solar World Congress 2015, SWC 2015
p.81-86
- Abstract
- The heat recovery system for ventilation is of major importance when low energy buildings are built. One alternative to the mechanical ventilation systems with heat recovery is to use a brine based run-around system that allows for heat recovery in for instance hybrid ventilated buildings. This type of heat recovery system has the potential to lower the need for electricity for the fans. Also, the installation has the potential to be simpler when pipes transporting the brine replace traditional air ducts. However, pipes needed to transport the brine will suffer from thermal losses. This will lower the efficiency of the heat recovery system. High losses could in practice make the system unusable. In order to estimate how much this affects... (More)
- The heat recovery system for ventilation is of major importance when low energy buildings are built. One alternative to the mechanical ventilation systems with heat recovery is to use a brine based run-around system that allows for heat recovery in for instance hybrid ventilated buildings. This type of heat recovery system has the potential to lower the need for electricity for the fans. Also, the installation has the potential to be simpler when pipes transporting the brine replace traditional air ducts. However, pipes needed to transport the brine will suffer from thermal losses. This will lower the efficiency of the heat recovery system. High losses could in practice make the system unusable. In order to estimate how much this affects the annual heat recovery a simulation tool was developed using TRNSYS. The result from the investigation shows that the losses for a system with 40 m pipes in total are approximately 300 kWh annually. This corresponds to approximately 9% of the energy savings from the ventilation heat recovery system. Insulating the pipes can reduce this heat loss by approximately 250 kWh annually. (Less)
- Abstract (Swedish)
- The heat recovery system for ventilation is of major importance when low energy buildings are built. One alternative to the mechanical ventilation systems with heat recovery is to use a brine based run-around system that allows for heat recovery in for instance hybrid ventilated buildings. This type of heat recovery system has the potential to lower the need for electricity for the fans. Also, the installation has the potential to be simpler when pipes transporting the brine replace traditional air ducts. However, pipes needed to transport the brine will suffer from thermal losses. This will lower the efficiency of the heat recovery system. High losses could in practice make the system unusable. In order to estimate how much this affects... (More)
- The heat recovery system for ventilation is of major importance when low energy buildings are built. One alternative to the mechanical ventilation systems with heat recovery is to use a brine based run-around system that allows for heat recovery in for instance hybrid ventilated buildings. This type of heat recovery system has the potential to lower the need for electricity for the fans. Also, the installation has the potential to be simpler when pipes transporting the brine replace traditional air ducts. However, pipes needed to transport the brine will suffer from thermal losses. This will lower the efficiency of the heat recovery system. High losses could in practice make the system unusable. In order to estimate how much this affects the annual heat recovery a simulation tool was developed using TRNSYS. The result from the investigation shows that the losses for a system with 40 m pipes in total are approximately 300 kWh annually. This corresponds to approximately 9% of the energy savings from the ventilation heat recovery system. Insulating the pipes can reduce this heat loss by approximately 250 kWh annually. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/b22f5a36-8969-48f1-82a8-62a776b09ab8
- author
- Davidsson, Henrik
LU
and Bernardo, Ricardo
LU
- organization
- publishing date
- 2015
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Hybrid ventilation,, Heat recovery
- host publication
- ISES Solar World Congress 2015, Conference Proceedings
- pages
- 6 pages
- conference name
- International Solar Energy Society, ISES Solar World Congress 2015, SWC 2015
- conference location
- Daegu, Korea, Republic of
- conference dates
- 2015-11-08 - 2015-11-12
- external identifiers
-
- scopus:85016972667
- ISBN
- 978-398146595-2
- DOI
- 10.18086/swc.2015.08.10
- language
- English
- LU publication?
- yes
- id
- b22f5a36-8969-48f1-82a8-62a776b09ab8
- alternative location
- http://proceedings.ises.org/swc2015/swc2015-proceedings.pdf
- date added to LUP
- 2017-02-27 22:33:48
- date last changed
- 2022-05-02 19:40:28
@inproceedings{b22f5a36-8969-48f1-82a8-62a776b09ab8,
abstract = {{The heat recovery system for ventilation is of major importance when low energy buildings are built. One alternative to the mechanical ventilation systems with heat recovery is to use a brine based run-around system that allows for heat recovery in for instance hybrid ventilated buildings. This type of heat recovery system has the potential to lower the need for electricity for the fans. Also, the installation has the potential to be simpler when pipes transporting the brine replace traditional air ducts. However, pipes needed to transport the brine will suffer from thermal losses. This will lower the efficiency of the heat recovery system. High losses could in practice make the system unusable. In order to estimate how much this affects the annual heat recovery a simulation tool was developed using TRNSYS. The result from the investigation shows that the losses for a system with 40 m pipes in total are approximately 300 kWh annually. This corresponds to approximately 9% of the energy savings from the ventilation heat recovery system. Insulating the pipes can reduce this heat loss by approximately 250 kWh annually.}},
author = {{Davidsson, Henrik and Bernardo, Ricardo}},
booktitle = {{ISES Solar World Congress 2015, Conference Proceedings}},
isbn = {{978-398146595-2}},
keywords = {{Hybrid ventilation,; Heat recovery}},
language = {{eng}},
pages = {{81--86}},
title = {{Heat Loss for a Run-Around Hybrid Ventilation System with Heat Recovery}},
url = {{http://dx.doi.org/10.18086/swc.2015.08.10}},
doi = {{10.18086/swc.2015.08.10}},
year = {{2015}},
}