Kolesnikova V. Increase of efficiency of means of individual anti-heat protection of miners by redistribution of thermal streams in underclothing space

Object of researches - heat exchange process in system "a heating microclimate - AHC - the person". The purpose of researches is increase of efficiency of conducting works in the conditions of a heating microclimate at the expense of improvement of anti-heat clothes. At performance of dissertational work was used the complex method of researches which contains the analysis and synthesis of scientific and technical achievements on a work subject was used; mathematical modeling of non-stationary heatexchange processes in system "a heating microclimate - AHC - the person", pilot studies of in vitro developed AHC model, mathematical data processing of pilot studies; an assessment of economic efficiency of use of the developed AHC model. The received scientific and practical results of work allowed to establish theoretically for the first time and experimentally to confirm regularity of decrease in losses of cold through AHC cover as a result of change of factor of radiation of its inside layer and nature of heat exchange between cooling elements and an inside layer of a heatinsulating part that allows to increase time of protective action of a set of cooling elements; experimentally to establish that redistribution towards a body of the person of a low-temperature thermal stream in underclothing space of AHC at the expense of introduction in its design of a ray-reflecting layer will lead to increase in the area of the site cooled by one element, in 1,5 times that will allow to reduce quantity of CE in clothes set, and respectively its weight, having kept a protective resource; experimentally to establish that gap existence between levels in a single-breasted design of anti-heating clothes leads to non-uniform distribution of low-temperature radiation in underclothing space that attracts reduction of time of protective action of AHC. Results of work are used by drawing up of recommendations about increase of a cooling resource of means of anti-heating protection of miners and rescuers which are transferred in "Respirator" and are used in educational process of "Donetsk national technical university". Branch standard of Ukraine "Means of individual anti-heating protection of miners. The general technical requirements and test methods" are regulated by use of the developed AHC model in the conditions of a heating-up microclimate.