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Design and Performance of a Hybrid Ventilation System with Heat Recovery for Low Energy Buildings

Davidsson, Henrik LU ; Bernardo, Ricardo LU and Larsson, Stefan (2011) In Journal of Environment and Engineering 6(2). p.469-477
Abstract
A new hybrid ventilation system for low energy buildings has been investigated

theoretically using TRNSYS. The system is based on natural ventilation but utilizes

a fan during hours when the natural driving forces are not sufficient. Heat from the

exhaust air is recovered in an air-to-water heat exchanger. The heated water is

pumped to the incoming ventilation air where it is heat exchanged to preheat the

fresh air. Energy from solar collectors is used in combination with heat recovered

from the sewage system to heat the ventilation air and to preheat the cold water for

domestic use. Results from the TRNSYS simulations show that the bought annual

auxiliary energy need... (More)
A new hybrid ventilation system for low energy buildings has been investigated

theoretically using TRNSYS. The system is based on natural ventilation but utilizes

a fan during hours when the natural driving forces are not sufficient. Heat from the

exhaust air is recovered in an air-to-water heat exchanger. The heated water is

pumped to the incoming ventilation air where it is heat exchanged to preheat the

fresh air. Energy from solar collectors is used in combination with heat recovered

from the sewage system to heat the ventilation air and to preheat the cold water for

domestic use. Results from the TRNSYS simulations show that the bought annual

auxiliary energy need for the new hybrid ventilation system is lower than for a

conventional fan driven ventilation systems using air-to-air heat recovery units

combined with an identical solar collector and sewage heat recovery unit. Since the

new system is based on natural ventilation it is also more silent compared to

standard mechanical ventilation systems. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
System Simulation, Waste Heat Recovery, Solar Energy, Low Energy House, NZEB, Hybrid Ventilation, TRNSYS, Natural Ventilation, Energy Saving, Natural Convection
in
Journal of Environment and Engineering
volume
6
issue
2
pages
469 - 477
publisher
Japanese Society of Mechanical Engineers
DOI
10.1299/jee.6.469
language
English
LU publication?
yes
id
a7f982fc-8cbb-432c-924f-51483844a9bb (old id 2337121)
alternative location
http://www.jstage.jst.go.jp/article/jee/6/2/469/_pdf
date added to LUP
2014-04-28 11:17:31
date last changed
2016-04-16 08:55:02
@article{a7f982fc-8cbb-432c-924f-51483844a9bb,
  abstract     = {A new hybrid ventilation system for low energy buildings has been investigated<br/><br>
theoretically using TRNSYS. The system is based on natural ventilation but utilizes<br/><br>
a fan during hours when the natural driving forces are not sufficient. Heat from the<br/><br>
exhaust air is recovered in an air-to-water heat exchanger. The heated water is<br/><br>
pumped to the incoming ventilation air where it is heat exchanged to preheat the<br/><br>
fresh air. Energy from solar collectors is used in combination with heat recovered<br/><br>
from the sewage system to heat the ventilation air and to preheat the cold water for<br/><br>
domestic use. Results from the TRNSYS simulations show that the bought annual<br/><br>
auxiliary energy need for the new hybrid ventilation system is lower than for a<br/><br>
conventional fan driven ventilation systems using air-to-air heat recovery units<br/><br>
combined with an identical solar collector and sewage heat recovery unit. Since the<br/><br>
new system is based on natural ventilation it is also more silent compared to<br/><br>
standard mechanical ventilation systems.},
  author       = {Davidsson, Henrik and Bernardo, Ricardo and Larsson, Stefan},
  keyword      = {System Simulation,Waste Heat Recovery,Solar Energy,Low Energy House,NZEB,Hybrid Ventilation,TRNSYS,Natural Ventilation,Energy Saving,Natural Convection},
  language     = {eng},
  number       = {2},
  pages        = {469--477},
  publisher    = {Japanese Society of Mechanical Engineers},
  series       = {Journal of Environment and Engineering},
  title        = {Design and Performance of a Hybrid Ventilation System with Heat Recovery for Low Energy Buildings},
  url          = {http://dx.doi.org/10.1299/jee.6.469},
  volume       = {6},
  year         = {2011},
}