Heat and Water Vapour Transfer Trough the Envelope of a Cold chamber

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Clito Afonso (Author) FEUP

Journal

Title: Journal of Environmental Science and Engineering

Serial No. 77 Vol. 8 No. 1

Pages: 362-370

ISSN: 0367-827X

Publisher: National Environmental Engineering Research Institute

Indexing

ProQuest

EBSCO

Other information

DOI: 10.17265/2162-5298/2016.07.004

Abstract (EN): The diffusion of water vapour in the atmospheric air through the elements of the envelope of a cold storage room, caused by the pressure gradient between the external and internal environment is inevitable in most situations. In fact, if the conditions in the interior of an envelope element are such as to enable the vapour freezing of the migrant water, the increase in volume from the formation of ice will causes the deformation of this element with very serious consequences, which can go up to its partial or total destruction. In this scenario, readily note the importance of vapour barriers associated with a properly designed insulation, tend to not only reduce the amount of water diffused, but also prevent the achievement of the conditions for freeze inside the engaging elements. The purpose of this work is to formulate the procedure for design of vapour barriers connected with the design of optimized thermal insulation, and then apply it to a cold chamber located in Portugal. Vapour barriers and the procedure for its design are both mandatory. The required thickness of the vapour barrier is relatively small, and the most appropriate insolation (maintaining the optimal thickness) is the black cork agglomerate.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9