Document Z2MLG4MmkwjwVn8mJzovyLj7

962 CHAPTER 45 1953 Guide Table 1.. Temperatures and Humidities Applicable to Industrial Air Conditioning--(Continued) CANDY (HARD) (Continued) Hot rooms used in the drying of jellies and gums are maintained at 120 to 150 F. A purge system using 100 percent outside air, bypassing the heating coil, is incorporated to produce rapid cooling of both the product and the room. Cold rooms for oooling marshmallows and cast creams are maintained at 75 to 80 F with a relative hu midity of 45 to 50 percent. Uniform air distribution is *gntiA.I- Standard starch drying equipment is employed. Filtration of air is required. Process Manufacturing .................. Rnllinv Strininv...................... Breaking........................ Wranninw .. j Temp. F CHEWING GUM 77 68 72 . 74 74 R.H. % SI Process Temp. F _ r" R.H. 19 m Refractorv.................... Molding room. - a Clay storage...................... Decalcomnnin reduction.. 3 Decorating rrw-.ni......... CERAMICS 110 to 150 80 60to 80 75 to 80 75 to 80 50 to 90 60 to 70 35 to 65 48 48 Relative humidity has no effect on the manufacture of the products. ii .. Temperature and humidity must be controlled in the decorating shop in the whiteware plants, and the decaloomama production room. r Dust control is essential, and the dust count must be held down to four million particles per cubic foot due to the danger of RilirraiV Process Temp. F R-H. % 3 Packaging J! f|' CEREAL 7H0 45-50 Process Temp. F R.H. % CITRUS FRUIT !i; 58 84 to 88 60 86 to 88 I * Prior to transcontinental shipment Careftil consideration must be given to air volumes, air temperatures, humidity, ventilation and dis * tribution. In regions where end rot is prevalent, it may be necessary to store grapefruit at temperatures of 32 to 34 F for a period not exceeding six weeks. Lemon and grapefruit storage requires an air conditioning system to (1) maintain a constant temperature, (2) maintain a high relative humidity, (3) ventilate to maintain 0.1% CO* content, (4) obtain uniform air distribution, and (5) provide air washing or air filtration. .1^*1 calculations include (1) transmission losses, (2) internal load-fruit oooling and respiration, oooling fruit boxes, electric load, and people, and (3) outside air load--72 cfm per carlot. Specific heat--Btuper (lb) (Fdeg): Lemons 0.04, Grapefruit 0.87, Boxes 0.40 Temp. 32 40 . 60 80 HEAT OF EVOLUTION IN Btu Peb (ton) (24 hb) Lemons Grapefruit 580 810 2070 6200 460 1070 2770 4180 Industrial Air Conditioning 963 Table 1. Temperatures : and ^Humidities Applicable, to. Industrial? Air CoNDiTiONiNO^(Continued) CITRUS FRUIT (Continued) Approximately 10 percent of.the cooling load is considered as latent heat load. In a conventional system the air required is one cfm per storage box or 650 cfm per carload, resulting in a small temperature rise in the supply air making possible the required high humidities. In a combination system the air required is one cfm per sq ft of floorarea or 300 cfm per carlot with the addition of auxiliary humidifying nozxles to maintain the required high humidities. ' Installation of metal ducts is required. Ductwork made of insulation board is sometimes preferred. DISTILLING Temp. F R.H. % Storage: Gram.......................... Liquid Yeast............ . General Manufacturing. Aging............................ 60 32 to 34 60 to 75 65 to 72 . 1 35 to 40 45 to 60 50 to 60 Afnwhing done at 150 to 155 F, then oooled to 64 to 68 F. Yeast culture fermented at 170 F, then oooled to 70 to 72 F. Yeast propagated at 150 to 154 F. Mnnh heated to 165 F and then cooled to 80 F, then pitched with yeast and fermented at maximum tem perature of 85 F. Cooling for various stilling processes normally accomplished by use of river or well water depending on temperatures and availability. Low humidity and dust control important where grains are ground. Viscous filters preferred as mold spores and bacteria are trapped in the viscous film, preventing propaga tion. PBOCE8S Temp. F ELECTRICAL PRODUCTS Electronics and X-Ray: Coil & transformer winding........................... Tube assembly................................................. Electrical Instruments: Manufacture and Laboratory.................. Thermostat assembly & calibration.............. Humidistat assembly & calibration.............. . Small Mechanisms: Close tolerance assembly.............................. ' Meter assembly and test.............................. Switchgear: Fuse and cutout assembly.. ......................... Capacitor winding............................................ Paper storage................................ .................... Conductor wrapping with yarn......................... Lightning arrestor assembly............................... Thermal circuit breakers assembly and test.:. Water wheel generators: Thrust runner lapping..................................... Rectifiers: Processing selenium and copper oxide plates. Dust control is essential in these processes 72 68 70 76 76 72 74 to 76. 73 73 73 75 68 76 70 74 R.H. % 15 40 50 to 55 50 to 55 50 to 55 40 to 45 60 to 63 50 50 50 65 to 70 20 to 40 30 to 60 30 to 50 30 to 40 PBOCESS Temp. F 1 R-H. % FLOOR COVERING Linoleum: * grains per pound ahs. hum. 90 to 100 80 160 to 250 20 to 28 30 to 50 60 gr* Some operations are stabilised against possibility of mold growth. Precise control of temperature and humidity is required for mechanical oxidising of linseed oil. The rate of flow and the temperature of cooling water in the jacket surrounding the tank must be controlled. Air filtration is recommended for the storing process.