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Inferring ventilation and moisture release rates from field psychrometric data only using system identification techniques

Cunningham, M. J.
2001
Building and Environment, No 36, pp 129-138
moisture, perfluorocarbon tracer

Cunningham, M. J., (2001), "Inferring ventilation and moisture release rates from field psychrometric data only using system identification techniques", Building and Environment, No 36, pp 129-138.
Abstract:
System identification techniques are developed allowing room or building ventilation and moisture release rates to be inferred from field psychrometric data only. The techniques have been developed primarily to allow the surveying of a large number of houses so that statistical properties can be compiled, in which high accuracy of individual results is not required. This system provides an alternative to PFT tubes, with some economic advantages. These techniques give rise to two parameters (describing the hygroscopic properties of the room) from which ventilation and moisture release rates can be calculated given indoor and outdoor psychrometric data only. Results within 30% of measured values have been obtained, except for the case of moisture release rates under airtight conditions where results seem unreliable.

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Author Information and Other Publications Notes
Cunningham, M. J.
BPANZ, Moonshine Road, Judgeford, Private Rag 50908, Porirua, New Zealand. Department of Building Physics at Chalmers University of Technology, G6teborg, Sweden
  1. A field study of the moisture performance of roofs of occupied newly constructed timber framed houses
  2. A prarmeteric study of wall moisture contents using a revised variable indoor relative humidity version of the "MOIST" transient heat and moisture transfer model
  3. Effective penetration depth and effective resistance in moisture transfer
  4. Modelling of Moisture Transfer in Structures-III. A Comparison between the Numerical Model SMAHT and Field Data
  5. Predicting psychrometric conditions in biocontaminant microenvironments with a microclimate heat and moisture transfer model - description and field comparison
  6. The building volume with hygroscopic materials--an analytical study of a classical building physics problem
  7. Using hygroscopic damping of relative humidity and vapour pressure fluctuations to measure room ventilation rates  


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