Energy efficient demand controlled ventilation in dwellings
The project was in two parts: 1) Evaluation of ventilation needs in dwellings and 2) Development of a computer model for calculation of transient hygrothermal conditions of indoor spaces and building envelopes.
The project forms phase one of a complete project in four phases. The aim of the complete project is to develop and investigate new ventilation strategies in which the constant basic ventilation is reduced and the ventilation can be individually increased according to actual needs in each dwelling and room so that a good indoor climate is achieved using least amount of energy. The complete project is a concerted effort which could form basis for innovative ventilation solutions and new requirements in the coming building regulations, BR 2005. In phase 1 an evaluation will be carried out, for different types of dwellings, whether the basic ventilation can be reduced and what the needs are for increased ventilation in certain rooms and time periods. Also, it will be evaluated whether demand controlled ventilation as a result will reduce energy consumption and environmental impact. In collaboration with the Danish Technical University a simple computer model will be developed. The model, based on reference year climatic data, will compute humidity conditions and CO_2 levels in the individual rooms in typical dwellings
Evaluations of the ventilation need in dwellings have been carried out based on processing selected topics within domestic ventilation and with respect to current building regulations. Furthermore, the evaluations have taken into consideration knowledge of today on on ventilation and indoor climate in connection with expectations on constructions and the use of alternative materials and furnishings in dwellings of the future. Associated with the evaluations a number of scenarious regarding ventilation and distribution of pollutants and moisture within a typical dwellig have been investigated through computer simulations. The results have been reported in SBI-meddelelse, 130 'vurdering af ventilationsbehov, 2000' (in Danish). The evaluations of the ventilation need in dwellings and the computer simulations indicate that in typical dwelling and under normal use the moisture content of the room air will be determining for the ventilation. In addition, the results indicate that it is possibel through appropriate control to reduce the basic ventilation without compromising the indoor climate. The Technical University of Denmark has carried out part 2 of the project. The model developed has been implemented in the well-known computer programme BSim2000. This project forms phase 1 of a 5-year research programme. Phase 2 has been initiated and will include laboratory tests of promising ventilation strategies
Key figures
Category
Participants
| Partner | Subsidy | Auto financing |
|---|---|---|
| Danmarks Tekniske Universitet (DTU) |
Contact
Dr. Neergaards Vej 15
DK-2970 Hørsholm, Denmark
Bergsøe, Niels C. (seniorforsker), 45865533, sbi@sbi.dk
Øvr. Partnere: Danmarks Tekniske Universitet