Basis of design and quality assurance of the special protective clothing of fire fighters
Keywords:special protective of clothing, the compartment, the thermoregulation, thermal comfort
Purpose. Increase the level of combat readiness of agencies and units for emergency situations, firefighters and rescuers workplace safety by improving personal protective equipment. Development and application of innovative methods of design and quality assessment.
Methods. The method of the compartmental approach is applied, which allows to proceed to a quantitative assessment of the transport processes, both for individual parts and on their basis of the human body as a whole. For such an analysis, it is necessary to determine the ways of heat production and heat transfer with the formulation of equations including terms that can be measured or estimated. The complex of studies on the evaluation of protective properties after multicycle impact during the operation of clothing with a special protective was carried out.
Findings. The method for constructing a heat and moisture transfer model in the system «human – protective clothing – external environment» was proposed. The human body is represented by a set of elements with a special compartment taking into account the circulatory system and a compartment with layers of clothing. The physico-mathematical model of the heat balance is formulated with the inclusion of heat transfer equations and the equation for moisture transfer. The model makes it possible to simulate heat and moisture transfer in the system «human – protective clothing – external environment», taking into account the internal state of the human body considering the compartment of protective clothing of firefighters.
Application field of research. As a result of the theoretical analysis of the regularities in the changes in the thermophysical properties of the fire protective clothing package during operation, mathematical models of the relationship between the resistance to the heat flux of a package of materials and the number of loading cycles are presented. Their application will make it possible to predict the life expectancy of firefighters protective clothing during operation by the results of rapid research methods.
Conclusions. A physico-mathematical model that allows modeling heat and moisture transfer in the «human –тprotective clothing – external environment» system, taking into account the internal state of the human body when considering an additional compartment-protective clothing was formulated. The models that take into account the relationship of resistance to heat flow from the special protective clothing thermal number of cycles was given.
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