Design and Performance of a Hybrid Ventilation System with Heat Recovery for Low Energy Buildings
Author
Summary, in English
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.
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.
Department/s
Publishing year
2011
Language
English
Pages
469-477
Publication/Series
Journal of Environment and Engineering
Volume
6
Issue
2
Links
Document type
Journal article
Publisher
Japanese Society of Mechanical Engineers
Topic
- Building Technologies
Keywords
- System Simulation
- Waste Heat Recovery
- Solar Energy
- Low Energy House
- NZEB
- Hybrid Ventilation
- TRNSYS
- Natural Ventilation
- Energy Saving
- Natural Convection
Status
Published
Research group
- Energy and Building Design