ISSUE 23



Kyiv National University of Construction and Architecture (KNUCA)

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VENTYLIATSIIA, OSVITLENNIA TA TEPLOHAZOPOSTACHANNIA

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V. Dovhaliuk, Ph.D., professor. Kyiv National University of Construction and Architecture, Kyiv, Ukraine, tgsiv@ukr.net, ORCID: 0000-0002-4836-5354
Y. Chovnyuk, PhD, associate professor. National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine, ychovnyuk@ukr.net


Theoretical Development of Thermal-Exchange and Deformation Processes in Polymerical Dispersion Solids for Microclimate Forming in Museums


Abstract. For storage of museum exhibits, among which polymeric disperse, it is necessary to provide microclimate parameters that slow down aging and degradation as much as possible. An adequate physico-mechanical model is justified that consists of a system of differential equations for the joint description of heat-exchange and deformation processes in disperse materials. It is obtained using the Boltzmann-Volterra theory, the first law of thermodynamics for open systems, and the method for determining the parameters of the influence functions. It is shown that when studying the influence of heat and moisture on the deformation properties of polymeric materials, it is more consistent to take into account description of their mutual influence on each other rather than separately the influence of heat and mass transfer on rheological processes. This approach allows studying the influence of temperature-humidity regime of museum premises on the processes of load and deformation of polymer-dispersed materials of museum exposition. Incliding the differential equations that describe the processes of heat transfer and deformation in colloidal capillary-porous bodies taking into account the relative humidity of the environment in which the material is located, allows accurate description the processes that occur during the museum storage of exhibits. The results obtained in the work can be used to develop engineering methods for calculating the systems of forming the microclimate of museum premises, both at the stages of designing the relevant technical systems, and in the regimes of actual operation.


Key words: influence, deformation, dispersion, materials


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