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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 In ISES Solar World Congress 2015, Conference Proceedings p.81-86
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)
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)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Hybrid ventilation,, Heat recovery
in
ISES Solar World Congress 2015, Conference Proceedings
pages
6 pages
conference name
International Solar Energy Society, ISES Solar World Congress 2015, SWC 2015
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
2017-05-14 04:51:16
@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},
  keyword      = {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},
  year         = {2015},
}