|Document ID (ISN)||41185|
|ISSN - Serial title
||0041-5790 - Ugol'
|Convention or series no.
||Bal'bert B.M., Barac Ju.M., Ostapenko V.I.
||GROT, a personal cooling device
||Individual'nyj pnevmatičeskij kondicioner GROT [in Russian]|
||Apr. 1982, No.4, p.45-46. Illus.
||An air-cooled vest for use in hot workplaces such as deep mines is described. The device is designed for workers expending energy at rates of 10.5-42kJ/min at environmental temperatures of 40░C and relative humidities of 100%. The worker's chest is cooled by perforated plastic panels held in place by straps. The panels are fed with cooled (25░C) dehumidified air from a miniature refrigeration unit hung from the waist. Air and power are both supplied by the compressed-air system of the mine: part of the incoming compressed air (0.4-0.6MPa) is expanded in a heat exchanger to produce cold, while the remainder of the air is passed over the heat exchanger and on to the vest. The refrigeration pack is small enough to fit in a standard battery case; it is connected to the mine's compressed air system by a hose with quick-disconnect fittings. The refrigeration pack weighs 1kg, the vest 0.8kg. A worker fitted with the vest was able to sustain work of moderate effort for 220min at 35-36░ and 98-100% relative humidity; a control subject without the vest could tolerate only 80min.
||work at high temperature; mining industry; air-fed clothing; personal protective equipment
||description of equipment
||D - Periodical articles
||Heating, ventilation and climate
|Broad subject area(s)
Mining and quarrying