Document 8GVk6dGnk75rxY7rJN202ada

594 CHAPTER 24 1956 Guide -Panel Heating and Cooling "Analysis,'by B. F. Raber and F.-W. Hutchinson (A.S.H.V.E. Transactions, Vol. 47, 1941, p. 285). , Operating Results of a Residence Radiant Wall Heating System, by E. J. Rodee (A.S.H.V.E. Transactions, Vol. 47, 1941, p. 123). Performance of a Residential Panel Heating System, by H. F. Randolph and J. B. Wallace (A.S.H.V.E. Transactions, Vol. 49, 1943, p. 235). Radiant Heating {Heating and Ventilating, March, 1941, p. 35). Radiant Heating and Cooling, by F. E. Giesecke (Heating, Piping and Air Condi tioning, June, July, August, September and October,cO). Calculations for Radiant Heating, by T. Napier Adlam {Heating and Ventilating, OcRtoabdeira, n1t9H31e).ating a'nd Cooling, Part I, by C. 0. Mackay, L. T. TWTT r.igiht, JTr., ^R. -En. Clark, and N. R. Gay {Cornell University Engineering Experiment Station, Bulletin No. 32,-1943). L _ Tr J -Design Method for Panel Heating Systems Using Copper Tubing, by R. G. Vander- weil (A.S.H.V.E. Journal Section, Heating, Piping and Air Conditioning, Nov. 1947, p. 123). ^^ Air .Temperature Gradients in a Panel Heated Room, by J. M. Ayres and B. W. Levy (A.S.H.V.E. Transactions, Vol. 54, 1948, p. 131). Graphical Solution of Radiant Panel Areas, by W. P. Chapman and R. E. Fischer {Heating and Ventilating, Jan. 1948, p. 88). Embedding Coils in Radiant Heating Panels, by D. L. Mills and L. J. LaTart {Heating and Ventilating, Dec. 1947, p. 75). Radiant Heat with Copper Tubing, by D. L. Mills and L. J. LaTart {Heating and Ventilating, Nov. 1947, p. 95). ,. Panel Heat with Copper Tubing--Experiment in Practice, by D. L. Mills and L. J. LaTart {Heating and Ventilating, Oct. 1947, p. 65). Experimental Studies bn Panel Heating Tube Spacing, by B. F. Raber and F. W. Hutchinson (A.S.H.V.E. Transactions, Vol. 53, 1947, p. 369). Panel Heating--A Basic Discussion, by S. Konzo {American Artisan, Oct. 1946, p. 68). Solar House Heated by a Warm. Air Floor Panel, by John E. Peterson {American Artisan, Dec. 1946, p. 83). . Design Data for a Warm Air Floor Panel, by Axel B. Algren (American Artisan Jan. 1947, p. 141). ,_ The Mechanism of Heat Transfer, Panel Cooling, Heat Storage, by Charles b. Leopold {Refrigerating Engineering, July 1947, p. 33) Radiant Heating--Simplified Design and Installation {Copper and Brass Research i4ssociation 1949) Research Report No. 1387--Laboratory Studies on Heat Flow Within a Con crete Panel, by C. M. Humphreys, H. B. Nottage, C. V. Franks, R. G. Huebscher, L. F. Schutrum and D. W. Locklin (A.S.H.V.E. Transactions, Vol. 56, p. 175). Research . Report No. 1388--Heat Flow Analysis in Panel Heating or Cooling Sections, by L: LL Hulbert,.H.. B. Nottage and C. V. Franks (A.S.H.V.E. Trans actions, Vol! 56, 1950, p. 189). ", Electric Analogger Studies on Panels with Imbedded Tubes, by Carl F. Kayan (A.S.H.V.E. Transactions, Vol. 56, 1950, p. 205). Books . Hot Water Heating, Radiant Heating and Radiant Cooling, by F. E. Giesecke (Tech nical Book Co!, P. 0. Box 62, Austin, Tex. 1947). , Panel Heating and Cooling Analysis, by B. F. Raber and F. W. Hutchinson (John Wiley and Sons, New. York, 1945). Radiant Heating, by T. Napier Adlam (Industrial Press, 148 Lafayette St., New York 1947). .- . . Radiant Healing, by R. W. Shoemaker, 1948 (McGraw-Hill Book Co., New York). Chapter V (pages 103-115)" of Heating and Air Conditioning, by J. R. Allen, J. H. Walker, and J. W. James (McGraw-Hill Book Co., New York--Sixth Edition, 1946). Chapter 12 (pages 363-392) of Heating, Ventilating and Air Conditioning Funda mentals, by W. H. Severns and J. R. Fellows (John Wiley and Sons, New York, Second Edition, 1949). ; CHAPTER 25 UNIT HEATERS AND UNIT VENTILATORS Definitions; Unit Heaters: Classification, Application, Ratings,.Location, Space Temperatures, Control, Piping, Maintenance, Boiler Capacity; Unit Ventilators: Ratings, Capacity Requirements, Application, Selection, Control, Location, Exhaust Flues; Window Ventilators THE generally accepted meaning of the word unit in the terms unit heat ers; unit ventilators, and unit humidifiers, is that of a factory-made encased assembly of the functional elements indicated by its name." The term unit heater denotes ah assembly of elements, the principal function of which is heating. The essential elements of a unit heater are a fan and motor, a heating element, a housing, and outlet vanes or diffusers. Some types are.shown in Figs. 1 to 4. 'Die term unit ventilator denotes an assembly, the principal function of which is to ventilate and cool the space by the introduction of outdoor air. It may serve to heat and circulate the air within the space; or introduce air from outdoors, or may accomplish both in varying proportions. The essential elements of a unit ventilator are fans and motor, heating element, dampers, and outlet grilles or diffusers, all encasediin a housing. Classification UNIT HEATERS The various types of unit heaters which are at present available can usu ally be classified according to one of the three following methods: l. By type of heater. Under this classification there are three types of heating elements to be considered: (o) the steam or hot water type, (b) the electric type, and (c) the direct fired type which may be gas, oil, or coal fired. 2. By type of fan. Under this classification there are two types of fans to be considered: (a) the propeller type1 and (6) the centrifugal type. Either type may be arranged for horizontal or vertical delivery of air. 3. By arrangement of elements. Under this classification there are two types of heaters to be considered: (a) the draw-through type, in which the fan draws air through, and (b) the blow-through type, in winch the fan blows air through the heater. Unit heaters are available in any combination of the three preceding gen eral classifications. For example, the steam or hot water type may be secured with either the propeller or centrifugal type of fans, and in either the draw-through or blow-through type. Unit heaters also vary in other minor respects. For example, steam and return inlets and outlets may be located on top and bottom, respectively, or on the same side of the unit. Some units are supported by the piping and some have independent supports. The heating surface of steam or water type units is generally made up of a non-ferrous tube-and-fin assem bly ; or it may be fabricated of steel, of cast in steel or iron. 595