Industrial Heating as a Central Station Load

Industrial Heating as a Central Station Load

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...air surrounding the heaters is not more than 200 degrees C. (392 degrees F.) and where there is good circulation of air. Class B--Air heating at ordinary temperatures, where there is reasonably good ventilation. Class C--Heating of press heads, hot plates, etc., where the heaters are clamped between heavy plates and where the input does not exceed four watts'per square inch of plate area exposed to free radiation. The maximum input for any given length of heater depends upon the class of service. The maximum safe input for the wide and narrow types is approximately as shown below, this input being given in watts per inch length of active heater (not including the terminal construction). REINFORCED RESISTOR MOUNTING EYELET INSULATED FROM csuren PLATE MICA INSULATION I STEEL CASING Class Wide Type Narrow Type A 15 7.5 B 30 15 5gcti0n Through 1), -ill Furnace Tye B Weco Tampering and Annealing Electric Hoskins Electric Furnace Type F C " OW" HERE are two different ways of producing heat from electric en I ergy. These are (1) By means of Resistance; (2) By means of an arc. It is readily seen that heat can be produced for use by either of these methods from both direct as well as alternating current, single or polyphase and at any commercial voltage. Hence, practically all of the heating devices at present in the market can be operated from any avail able source of current. Of these two methods, that of producing heat by means of resistance, aptly termed the " oulean Effect" since it is based on oule's Law, is almost universally employed; about the only exception is that of the use of the arc in arc welding and arc furnaces. Moreover, due to prevalence of alternating current supply throughout the country as well as its...show more

Product details

  • Paperback | 34 pages
  • 189 x 246 x 2mm | 82g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236514750
  • 9781236514752