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70 degrees absorber absorption system applied asbestos atmospheric average boiler brine building capacity carbon dioxide cent coils cold compression system condenser connected cooling cubic feet cubic foot cylinder damper degrees temperature diameter District Heating efficiency engine evaporator exhaust steam expansion tank feet of air feet per minute feet per second floor formula friction furnace gallons gases heat loss heater Heating and Ventilating heating surface heating system horse-power humidity installed latent heat liquid live steam method mineral wool moisture pounds gage pounds of steam pressure pump radiator refrigerant riser sections shown in Fig square feet square foot square inch stack Steam Heating steam systems sulphur dioxide supply t. u. per hour Table temperature thermostat tion total heat transmission vacuum valve velocity wall warm air Water Heating weak liquor weight zero day
Page 10 - It is that quantity of heat required to raise the temperature of one pound of pure water one degree Fahrenheit at the temperature of greatest density of water.
Page 13 - The ratio of the heat required to raise the temperature of a certain weight of a given substance one degree to that required to raise the temperature of the same weight of water one degree from the temperature of maximum density 39.1 is commonly called the specific heat of the substance.
Page 368 - ... cover 15.2 Two layers asbestos paper, I in. hair felt, canvas cover, wrapped with manilla paper 15. Two layers asbestos paper, I in. hair felt 17. Hair felt sectional covering, asbestos lined 18.6 One thickness asbestos board...
Page 25 - Thermometer Scale at which the mercury stands. Then swing the index hand to the right, until the sliding pointer intersects the curved line which extends downward to the left from the degree of the Dry Bulb Thermometer Scale at which the mercury stands.
Page 368 - University,° Relative amount Kind of covering of heat transmitted Naked pipe 100. Two layers asbestos paper, 1 in. hair felt, and canvas cover 15.2 Two. layers asbestos paper, 1 in. hair felt, canvas cover wrapped with manilla paper 15. Two layers asbestos paper, 1 in. hair felt 17. Hair felt sectional covering, asbestos lined...
Page 32 - V = striking velocity in feet per second, g = acceleration of gravity in feet per second...
Page 20 - Engineers (1910) we read that carbon dioxid "is constantly being diffused throughout the air of the room, thus rendering it unfit for use. If this carbonic-acid gas could be disassociated from the rest of the air and expelled from the room without taking large quantities of otherwise pure air with it, the problem of the heating engineer would be simplified, but this can not be done.
Page 57 - ... basis of a certain degree of ventilation. In obtaining the grate area, it is necessary to assume the quality of the coal, the efficiency of the furnace and the pounds of coal burned per hour per square foot of grate.
Page 13 - In the above expressions, p is the absolute pressure in pounds per square foot, v is the volume in cubic feet, and T is the absolute temperature in degrees Fahrenheit.
Page 368 - Asbestos molded, mixed with plaster paris 31.8 Asbestos felted, pure long fibre , 20.1 Asbestos and sponge 18.8 Asbestos and wool felt 20.8 Magnesia, molded, applied in plastic condition 22.4 Magnesia, sectional 18.8 Mineral wool, sectional 19.3 Rock wool, fibrous 20.3 Rock wool, felted 20.9 Fossil meal, molded, J4 inch thick 29.7 In general the thickness of the coverings tested was one inch.