S.V. Kopin, Cand. Sci. (Eng.), Research Associate, mobil1111@mail.ru Scientific and Research Institute of Industrial and Marine Medicine of the Federal Medical Biological Agency, Saint Petersburg, Russia
Presence of heat release sources significantly changes the design mode of building ventilation. Under the conditions of absence of the toxic impurities in the working areas air, the stable mode of ventilation with the specified parameters can be achieved due to natural draft created when opening the openings in the ceiling or walls at the upper elevations on building height. In the presence of toxic substances released into the production process, the building depressurization is prohibited by the normative act.
Basic scheme of ventilation assumes at the same time the removal of air from the room through the network of suction pipelines by suction fan. Since the suction pipelines main system located under the building roof does not allow for eliminating completely the heated air circulation from the equipment surfaces, so the conditions for the formation of stagnant zones are created.
Performed calculations show that all the methods of estimating the gravitational and inertial forces distribution in the atmosphere of the shop of the industrial building give in whole rather good repeatability of the results. At the same time, when determining the parameters of heat flows considering the complexity of the calculations, the researcher shall have sufficiently high qualification to determine the complete list of all heating sources in the inspected building and to perform initial measurement of their parameters. The shortcomings of the remaining methods include the inability to develop compensatory measures for normalization of the design mode of building ventilation without further inspection of heat sources.
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