Search

In this work, the effect of drying with jet of air of two dissimilar moist thing geometries with whole and straight semi-circular on the enhancement of heat transfer and decrement of moisture amount was numerically examined. The drying jet had a laminar flow characteristic and two-dimensional jet situated at a fixed jet space from the moist thing. The moist thing diameter, jet space from the moist thing and height of jet initial were taken as stable in whole situations. Streamlines and isotherms were visualized around the things for dissimilar velocities of jet. A method of finite volume was used to figure out the conservation equations by employing software program of ANSYS Fluent 17.0. Computations were conducted for dissimilar Re, so, Re = 100, 200 and 300. It was obtained well accord with scalar and empirical output found in the reference. The results illustrated that the whole circular moist thing had greater good heat and moisture transfer performance than that of the straight semi-circular moist thing. Furthermore, it was seen that an increase of Re number had an affirmative effect on heat and moisture transfer. As locality, drying of jet was appeared to be most powerful close to the stillness point on the front face of the things [ABSTRACT FROM AUTHOR]

Moisture-related building envelope problems such as condensation, damp, delamination of coatings, unsatisfied user's comfort requirements usually arise from the unexamined/unforeseen interactions of materials with ambient environment, and with other system components during design. Today, it is possible to estimate the in-use performance of building envelopes by computer simulations except for test methods. While use of building simulation software intended to determine indoor climate systems providing appropriate environmental conditions and to assess building energy performance is increasing, the use of simulation software to assess hygrothermal performance of building envelopes has only been recently started to spread. This paper primarily deals with computer simulation software analysing hygrothermal performance of building envelopes, and important issues associated with their structure and use are considered. A typical wall design case performed by WUFI 2D is explained for contributing to extend the efficient use of simulation software in practice. Finally, when using simulation software to assess hygrothermal performance, 'selection of appropriate software' and 'planning of simulation work' processes are found matters of utmost importance in achieving goals set by the use of simulation. [ABSTRACT FROM AUTHOR]