Document 3e17X6rR79q13J97EXKYOND16

American Society of Heating and Ventilating Engineers Guide, 1934 Table 2. Desirable Temperatures and Humidities for Industrial Processing (Continued) Industry P&OCBSS Temperature Degrees Fahrenheit Fur ....................... Drying of furs.................................................... Storage of furs................................................... 110 28 to 40 Hospital........ ...... 75 to 80 Relative Humid ti t Per Cent 25 to 40 50 to 70 Incubators.......... Human babya.................................................... Incubator........................................................ 99 to 102 75 to 88 76 to 100 55 to 75 59 to 65 59 to 65 Laboratory......... General analytical and physical.................. Storage of materials......................................... Leather Library................. Bookstorage (seediscussioninthischapter) Linoleum............ Printing. ............................................................. Lumber........... ...... 60 to 70 60 to 70 90 65 to 70 80 180 60 to 70 35 to 50 38 to 50 40 30 Match.................... Manufacturing................................. ................. Storage of matches........................................ . Munitions. Fuse loading....................................................... 72 to 74 ' 60 70 50 55 Paint...................... Drying'of lacquers.............................. ............. Brush and spray painting............................. 60 to 80 60 to 90 60 to 80 25 to 50 25 to 50 25 to 50 Paper.................... Binding, cutting, drying, folding, gluing.. Storage of paper. .. ........................... ............. Photographic.... Development of film........................................ Drying................................................................. Printing...................... ......................................... 60 to 80 60 to 80 70 to 75 75 to 80 70 ' 72 25 to 50 35 to 45 60 50 70 65 Printing............... Folding.............................................................................. Press room (general)........................... :........... Press room (lithographic).............................. Storage of rollers............................................... 70 77 75 60 to 75 60 to 80 45 65 60 to 78 20 to 60 35 to 45 Rubber..................... Manufacturing. ................................................ Dipping of surgical rubber articles............ Standard laboratory tests.............................. 90 75 to 80 80 to 84 25 to 30 42 to 48 Soap............. ............... Drying................................................................................ 110 70 Textile..................... Cotton-- carding. .............................................. combing........................... -....I................. roving....................................................... spinning..................................................... weaving...................... .............................. 75 to 80 75 to 80 75 to 80 60 to 80 68 to 75 50 60 to 65 50 to 60 60 to 70 70 to 80 ."Application of Air Conditioning to Premature Nurseries .in Hospitals; by C. P. Yaglou, Philip Drinker, and K. D. Blackfan (A.S.H.V.E. Transactions, Vol. 36, 1930). 52 Chapter 3--Industrial Air Conditioning Table 2. Desirable Temperatures and Humidities for Industrial Processing (Continued) Textile..................... Process Temperature Degrees Fahrenheit Rayon-- spinning-- .................................... twisting............................. ............ Silk-- dressing.......................................... spinning. ...................................... throwing........................................ weaving.......................................... Wool-- carding... ....................................... spinning.....................................1-- weaving.......................................... 70 70 75 to 80 75 to 80 75 to 80 75 to 80 75 to 80 75 to 80 75 to 80 Cigar and cigarette making......................... Stemming or stripping.................................. 70 to 75 90 75 to 85 Relative Humiditt Per Cent 85 65 60 to 65 65 to 70 65 to 70 60 to 70 65 to 70 55 to 60 50 to 55 55 to 65 85 70 paper is independent of the relative humidity of the surrounding air. Low alkaline concentration spray water may be used in an air washer to neutralize the acid condition. Such an air washer must be especially constructed to resist corrosion. BANANA RIPENING Ripe bananas are very perishable and for this reason men who deal in them must depend mainly upon control of the ripening speed as a means of regulating their daily supply of the fruit. Knowledge and experience are required in regulating the ripening treatment and to control the ripening speed. An accurate appraisal must be based upon a careful examination of the fruit when received to determine its condition, and periodically, thereafter, to determine the rate of ripening. Fast ripening may be accomplished in from three to four days after the green fruit is placed in a ripening room by adjusting the temperatures of the room until the pulp temperature reaches about 70 F. In warming up cool fruit, quick heating is recommended, and it is good practice to use sufficient heat to raise the average fruit temperature at the rate of 2 to 3 deg per hourT"After the first 24 hours, the room should be held at 68 F until the fruit is colored and then reduced to 66 F and held at this tem perature. A high relative humidity of from 90 to 95 per cent should be maintained until the bananas show color when it may be reduced to about 80 per cent. High humidity is important during the warming period. No ventilation should be used until the fruit has colored, after which, ventilation at a rate not to exceed four changes per hour may be used to assist in reducing the humidity and to freshen the air in the room. If the fruit shows slow or uneven ripening characteristics, one or two applica tions of ethylene gas of approximately 1 cu ft per 1000 cu ft of room.space may be used. Medium speed ripening of bananas in from five to seven days may be accomplished by holding the fruit at 64 F. -The humidity and ventilation control should be the same as for fast ripening. A treatment with ethy lene gas will seldom be necessary. For slow ripening in from nine to ten 53