Cyclopedia of Engineering: A General Reference Work on Steam Boilers and Pumps ; Steam, Stationary, Locomotive, and Marine Engines ; Steam Turbines ; Gas and Oil Engines ; Gas-producers ; Compressed Air ; Refrigeration ; Elevators ; Heating and Ventilation ; Management of Dynamo-electric Machinery ; Power Stations ; Etc, Том 7American Technical Society, 1919 |
Інші видання - Показати все
Загальні терміни та фрази
A. C. McClurg air-valves ammeter amount armature arrangement belt boiler brushes building Cause cent circuit breaker cold-air commutator condensation connected cubic feet damper diameter direct radiation direct-current discharge ducts efficiency Electric feet per minute floor flues furnace heat loss heater heating surface hot-water inches indirect induction motor insulation John Wiley live steam load machine magnetism McClurg & Company Mechanical method Nostrand Company operation panels pipe placed plants pounds practice pressure pulley pump radiators regulation Remedy repulsion motor resistance revolutions per minute rheostat riser Rotary Converter sections shaft short-circuited shown in Fig shows shunt single-phase speed square feet square foot stations Steam Engine Steam Turbine supply Symptom synchronous Table tank temperature tion transformers turbine usually valve velocity ventilation voltage voltmeter volts walls warm air water-tube boilers wattmeter Wiley & Sons Wiring Diagram
Популярні уривки
Сторінка 109 - ... as most convenient. Types of Radiating Surface. Cast-iron radiators and circulation coils are used for hot water as — — ^ well as for steam. Hot-water radiators differ from steam radiators principally in having a horizontal passage at the top as well as at the bottom. This construction is necessary in order to draw off the air which gathers at the top of each loop or section. Otherwise they are the same as steam radiators, and are well arlarrfpr!
Сторінка 117 - One Method of Construction. Supply Pipes may be Either Drops or Risers. in the former case the return in Fig. 100 may be carried back, if desired, into the supply drop, as shown by the dotted lines. Combination Systems. Sometimes the boiler and piping are arranged for either steam or hot water, since the demand for a higher or lower temperature of the radiators might change. The object...
Сторінка 82 - Direct and indirect systems are often combined, in the living rooms, hallways and corridors, having only direct radiators for warming. Types of Heaters. Various forms of indirect radiators are shown in Figs. 52, 53, 54, and 56. A hot-water radiator may be used for steam; but a steam radiator cannot always be used for hot water, as Fig. 51. Steam Heater Connected to Wall Register — Indirect System.
Сторінка 64 - the condensation drains back through the same pipes, and is carried along with the flow of steam to the extreme end of the main, where it is returned to the boiler. The main is made large, and of the same size throughout its entire length. It must be given a good pitch to insure satisfactory results.
Сторінка 72 - We have seen that the higher the initial pressure with a given drop, the greater will be the quantity of steam discharged ; therefore a smaller pipe will be required to deliver 80 pounds of steam at 40 pounds than at 3 pounds initial pressure From Table XV, we find that a given pipe will discharge 1 . 7 times as much steam per minute with a pressure of 40 pounds and a drop of 3 pounds, as it would with a pressure of 3 pounds, dropping to zero. From this it is evident that if we divide 80 by 1 .7...
Сторінка 58 - X 225 = 240; that is the efficiency varies directly as the difference in temperature between the steam and the air of the room. It is not customary to consider this unless the steam pressure should be raised to 10 or 15 pounds or the temperature of the rooms changed 15 or 20 degrees from the normal. From the above it is easy to compute the size of radiator for any given room. First compute the heat loss per hour by...
Сторінка 110 - Connections. temperature of 170 degrees in the radiators. Variations may be made, however, to suit the existing conditions of outside temperature. We have seen that an average...
Сторінка 120 - The ordinary pet-cock air-valve is the most reliable for hot-water radiators, although there are several forms of automatic valves which are claimed to give satisfaction. One of these is shown in Fig. 104. This is similar in construction to a steam trap. As air collects in the chamber, and the water-line is lowered, the float drops, and in so doing opens a small valve at the top of the chamber, which allows the air to escape. As the water flows in to take its place, the float is forced upward and...
Сторінка 137 - As much of the oil as possible should be removed before the steam enters the pipes and radiators, else a coating will be formed on their inner surfaces, which will reduce their heating efficiency. The separation of the oil is usually effected by introducing a series of baffling plates in the path of the steam; the particles of oil striking these are stopped, and thus separated from the steam. The oil drops into a receiver provided for this purpose and is discharged through a trap to the sewer. In...
Сторінка 18 - If the contents of the bottle remains clear, treat the bottle of 200 'cubic centimeters in the same manner; a milky appearance or turbidity in this would indicate 12 parts in 10,000. In a similar manner, turbidity in the 250 cubic centimeter bottle indicates 10 parts in 10,000; in the 300, 8 parts; in the 350, 7 parts and in the 400, Fig ' 23