ABSTRACT
Mechanical cooling applications in industry for worker comfort occur where there is no significant process heat. Flushing the space housing the workers and process heat sources with large volumes of outdoor air, i.e., general ventilation. The elementary heat capacity formula describes the relation between ventilation rate and temperature rise in the ventilating air. It is interesting to conceive the practical economic limitations to mechanically induced ventilation in comparison with natural ventilation due to outdoor air motion. Application of local exhaust hoods to all heat sources for direct removal of heated air, gases, or steam through duct systems to the exterior. The most common and most familiar method for alleviating the discomforting effects of heat is by blowing volumes of air at the exposed individual, as by fans or air jets, i.e., bathing the worker's body in high velocity air currents to accelerate the dissipation of body heat. Radiant heat is one of the most important factors in industrial hot environments.
