Document y058xkX2paLEKp6bqMndn57r

American Society of Heating and Ventilating Engineers Guide, 1937 Table 11. Typical Calculation of Pipe Sizes on.Up-Feed Riser with Flush Valve Water-Closets and Urinals (See Fig. 5) Floor Fixtures of on Bldg. ' Floor 8th 4 W. C. 2 U. 3 Lav. 7th 4 W. C. 2 U. 3 Lav. 6th 4 W. C. 2 U. 3 Lav. 5th 4 W. C. 2 U. 3 Lav. 4th 3rd . 2nd 1st 10 Lav. 1 S. S. 1 S. S. 1 s. s. Gpm PER Fixture 45 30 3 45 30 3 45 30 3 45 30 3 3 4 4 4 Maximum Gpm on Floor Maximum Gpm ON Riser Probable Use (per cent) Probable Demand Riser Gpm Allowable Drop Lb per 100 Ft 180 60 9 249 249 44 109 8.5 180 60 9 249 498 180 60 9 28 139 8.5 249 747 22 .164 ' 8.5 180 60 9 249 996 18 179 8.5 30 1026 18 185 -8.5 4 1030 IS 186 8.5 4 1034 4 1038 IS 187 18 188 8.5 8.5 Pipe Size In. 2--K 3 3 3 3 3 3 Table 12. Suggested Storage Tank Sizes for Homes and Apartments2 All Year Service Based on Boiler Water at 180 F Tank Capacity Gal 30 35 40 50 60 72 80 100 125 150 200 250 300 , 400 ^ 500 Piping Connections Boiler, In. Tank, In. Number of Baths or Families r Ki iK K i IK K 1-2 IK K 1-2 IK l 1-2 IK l 2-3 2l 2-3 2 IK - 3-4 2 IK ' .4-5 2 IK ; 5-6 2 IK 6-7 2K ... : IK . 7-9 . 2K IK . 9-11 3 2 11-15 3 2 15-18 See pages 661 and 721 for further data. Service During Heating Season Based on Boiler Water at 215 F Tank Capacity 30 40 52 66 82 100 120 144 160 200 250 300 400 500 600 Piping Connections Boiler, In. Tank, In. Number of Baths or Families i i i IK IK. IK IK IK 2 2 2 .2 2K 2K 3 K K K l l l l l 4K IK iK . IK 2 2 2K i i i 1-2 2-3 3 4 5 6 6-7 7-9 9-11 11-15 15-18 18-21- Chapter 35--Water Supply Piping and Water Heating water demand can be heated during periods of light demand and stored up to^'use during the periods of heavy demand. The total water con sumption per person usually varies between 100 and 150 gal penday when laundry and culinary operations for the occupants are carried out on the same premises. The maximum hourly demand under these conditions will be found to be about one-tenth of the average daily consumption. If one-third of the total water used is hot water arid 125 gal per day is assumed as a fair average of consumption per person, it is apparent that each person uses about 40 gal of hot water per day. If one-tenth of this represents the peak hourly load, then 4 gph must be allowed per person for the heaviest demand. If the average occupancy of apartments is 3 persons, the peak hour demand per apartment will be about 12 gph. It is customary to allow 10 gph of heating capacity per apartment. Water in excess of this heating capacity drawn out during the peak hours is I '! I! } (o) ----- --1 t \ fV 1 r * / (i) !i fi t ! S t / 1 g -5 y 1 II -- >* -- o. CL 3 Vi y Q. O. 3 Vi 1. , \ > O. -& 3 V) ^ vs> 9 /<f (c> 1 A / Fig. 7. Methods of Arranging Hot Water Circulation Lines provided for by storage in the hot water tank where this water is heated during hours when the demand is below the average. Table 12-gives suggested storage tank sizes for homes and ..apartments based on the number of families or baths. HOT WATER HEATERS Various types of heaters are available for supplying the hot water for domestic service in buildings. In any hot water supply systeiri the water should..be heated to a. teinperature betweeh. l50'and 180 F. Where the hot water requirements include supplies for latchens, laundries or process work, the higher temperatures are used. In buildings where steam is available throughout the year, the hot water supply is usually taken from this source. In smaller domestic installations the fuel-burning device is generally automatically arranged so that hotwater is supplied the entire year and not merely when the boiler is used for heating purposes. 661