The focus of this paper is on controlling ventilation rate to provide acceptable temperature and relative humidity in the space being ventilated. To this end, a system of heat and moisture balance equations for building indoor and components is described. The system is solved numerically. Based on a series of indoor temperature and moisture measurements for our experimental house and well-mixed air distribution in room, moisture generation rate is estimated. The model is validated by simulating the experimental house. Good agreement between the simulated and measured results is obtained.
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.
The effects of air change and ground covers on crawl space moisture balance in a cold climate are discussed in this paper. The objectives were to assess the suitability of outdoor air-ventilation in the crawl spaces of apartment buildings, to determine the optimum air change rate with and without ground covers, and the effect of the ground covers' thermal insulation on moisture behaviour. Measured data from the test building was used to develop the crawl space model in a modular simulation environment, where the parametric simulations were carried out.
The association of moisture damages of school buildings with microbial indoor air quality and health status of school children was studied. To determine the association the school buildings (N=32) were divided into the moisture damaged (index) and non-damaged (reference) schools according to technical inspection data. Children's health surveys were made by questionnaires. Microbes were determined from indoor air of school buildings using a six-stage impactor. Children in the index schools reported more respiratory symptoms compared to children in the reference schools.
The low-slope roofs of ten cold storage buildings in the Dallas area were examined visually and thermo graphically (Tobiasson and Korhonen 1985) from above and below. Two inch (51 mm) diameter cores were taken to verify infrared findings and to determine moisture contents for estimating wet thermal resistances (Tobiasson et al. 1991 ). Twelve inch (0.3 m) square specimens of many of the insulations were removed for laboratory studies of their thermal properties and structure.
This paper explores the influence and role of both drainage and ventilation drying on the ability of enclosure assemblies to control moisture. Drainage is often the most direct method of removing water from within a wall (i.e., from exfiltration condensation or rain penetration), but it is often not sufficient to provide moisture control. Design approaches that rely solely on drainage to remove moisture from behind the outer layers or cladding ignore the significant quantities of moisture that can be stored in the outer layers of most enclosure walls.
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