Closed rooms

Odor is of prime importance because a petroleum solvent is often used in closed rooms moreover, the idea of odor is tied instinctively in the public image to toxicity. Odor is a function of the solvent s composition and volatility. Generally, the paraffin hydrocarbons are less odorous while the aromatics are more so. 

In compressor operation, part of the heat given off by the compressor and motor is transmitted to the surrounding air. For plants located in closed rooms, this heat must be removed to limit the rise in temperature of the ambient air. Some of the heat dissipates through walls, windows, floor and roof, but this heat removal is seldom sufficient. The compressor room should be ventilated and the heat removed with the ventilating air. Sometimes the heat can be recovered and used for heating purposes. In an entirely water-cooled compressor installation, the heat to be removed by ventilation is relatively small, since the cooling water takes the major part away. 

In the case of plant-protection products that are used in green-houses/closed rooms ... 

Ensure thorough ventilation of greenhouses/closed rooms before re-entry. 

Note that, as a matter of precaution, greenhouses/closed rooms should be thoroughly ventilated after each treatment, regardless of whether the product is classified and labeled in regard to health protection or whether the risk assessment reveals a specific exposure risk for workers. In a similar sense, and whenever possible, crop maintenance activities should be finished before plant-protection products are applied. 

Under normal household conditions the effect of electrostatic precipitators would be less dramatic than shown here, because these measurements were carried out in a closed room. With normal movement between rooms, the aerosol concentration would not be reduced by as much and the increase in unattached fraction of 218Po would be less. 

After combustion in a closed room, the temperature of the well-mixed gases achieves 350 °C. There is gaseous fuel in the room left over at a mass fraction of 0.015. There is ample air... 

A methane leak in a closed room is assumed to mix uniformly with air in the room. The room is (4 x 4 x 2.5)m high. Take the air density as 1.1 kg/m3 with an average molecular weight of 29 g/g mole. How many grams of methane must be added to make the room gases flammable The lower and upper flammability limits of methane are 5 and 15 % by volume respectively. 

Zukoski, E. E., Development of a stratified ceiling layer in the early stages of a closed-room fire, Fire and Materials, 1978, 2, 54—62. 

Is it possible to credibly interpret this body of thematically related aperture objects in a wider manner than only that unsymbolic one admitted to by Duchamp What is unquestionable is the fact that the interrelated motifs of windows, closed rooms, and, particularly, doors and portals are ubiquitous in the plentiful literature associated with the Esoteric Tradition. All of this is neatly explained in a certain book— Antoine-Joseph Pernety s Dictionnaire Mytho-Hermetique (1787)—that Duchamp is now known to have had handy at the Bibliotheque Ste. Genevieve. According to Pernety,... 

There are two reasons why Ftot might decrease during the process of evaporation (1) the surface area of the puddle will decrease, and (2) the concentration of MCF in the ambient air, C a, will increase. The influence of the latter effect can be estimated from the maximum concentration to be reached in the closed room when all MCF has evaporated ... 

Production of the SulpkwousAcid,—This first step is effected by burning the sulphur in a close room or oven. 

A tight closed room can also be used as a containment area, providing enough volume for the effluent to be contained, giving time for the subsequent treatment of relieved material by, for example, a scrubber system. These types of measures should only be considered as a last resort, since they are linked with heavy damage to the equipment. An alternative is the safe-bag retention system, proposed by Siemens [38]. 

Closed cabinet tests and their operation may be likened to a small lire burning in a closed room. The specimen is decomposed by a heat source and the resulting effluent accumulates within the cabinet. The decomposition system is either mounted within the cabinet as in the aircraft50 and maritime tests51 or may be outside, connected to the cabinet by a short duct, as in ASTM E 1678.52... 

Trip 3) Three days later, Wasson s wife Valentina Pavlovna ingested five pairs and their thirteen-year-old daughter Masha took four pairs of the same mushrooms. They swallowed them during the afternoon in sleeping bags in a closed room. This was the first occasion, Wasson remarked,... 

About forty-five minutes after the second dose, smoke rings filled the air, moving in slow motion about him. In a closed room on the sixth floor of a university building, there "was no possible source of smoke rings. Yet,... 

At 18°C, a sample of helium gas stored in a metal cylinder exerts a pressure of 17.5 atm. What will the pressure become if the tank is placed in a closed room where the temperature increases to 40°C ... 

Ozone is a highly irritating gas that reduces the lung capability of healthy people in concentrations as low as 0.12 ppm. Older photocopy machines could generate ozone gas and they were often placed in closed rooms with little air circulation. Calculate the volume of ozone gas that would result in a concentration of 0.12 ppm in a room with dimensions of 5.0 m x 4.0 m x 3.0 m. 

Most supercritical fluid equipment use CO2 non toxic, non flammable, it is particularly safe. However, CO2 build-up in closed rooms could lead to people asphyxia. It is the reason why all possible CO2 emissions (exit valves, safety valves, rupture disks,...) must be collected in a "over-dimensioned" vent line ensuring a good dispersion of the gas in the outside atmosphere. Moreover, it is highly recommended to install CO2 detectors in the equipment room but also in any connex room, for action on high power fans and operators information. Anyway, it is preferable not to operate an equipment in rooms located over other rooms, especially underground cellars, where CO2 that is heavier than air may accumulate. 

E.H. Barry of NY told to Mr Cohn of Franklin Institute that, in order to test the stability of silvering soln it was allowed to stand over the weekend in closed room, in an open beaker. On Monday morning the contents and the beaker fragments were found to have been scattered all over the ceiling. A similar accident was described in Scientific American, April 1932... 

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