Document BBX4XEe3qJgEXpk05dB61rO4

Heating Ventilating Air Conditioning Guide 1938 Table 10. Heat Gain from Various Sources Source Btu Peb Hour Sensible Latent Total Electric Heating Equipment Electric Equipment--Heating Water--Stewing. Boiling, etc. --............. ,, . . Electric Toasters or Electric Griddles Coffee Urn--Large, 18 in. Diameter--Single Drum Coffee Urn--Small, 12 in. Diameter--Single Drum....... Electric Ranee--Small Burner Electric Range--Large Burner ........................... .................................. ..................... Steam Table--Per Square Foot of Top Surface Plate Warmer--Per Cubic Foot of Volume. Baker's Oven--Per Cubic Foot of Volume............................... Frying Griddles--Per Square Foot of Top Surface...... .......................................... Hot Plates--Per Square Foot of Top Surface Permanent Wave Machine in Beauty Parlor--24-25 w Units-................................. 100% 80% 50% 3.4 3413 2546 90% 2000 1200 600 * * 8000 1025 300 850 3200 * * 2050 2050 0% 20% 50% 0 0 10% 2000 1200 600 * * 2000 0 800 0 1300 * * o 0 100% 100% 100% 3.4 3413 100% 4000 2400 3400 7500 1100 850 4500 4600 9000 2050 Gas Burning Equipment Gas Equipment--Dry Heat--No Water Evaporated...... ........................... Gas Equipment--Heating Water--Stewing, Boiling, etc.______________ __ Stove, Domestic Type--No Water Evaporated--Per Medium Size Burner Gas Heated Oven--Domestic Type .. Stove, Domestic Type--Heating Water--Per Medium Size Burner Residence Gas Range--Giant Burner (About 5M in. Diameter) Residence Gas Range--Medium Burner (About 4 in. Diameter)............ Residence Gas Range--Double Oven (Total Size 18 in. x 18 in. x 22 in. High) Residence Gas Range--Pilot........................... ............. Restaurant Range--4 Burners and Oven Cast-Iron Burner--Low Flame--Per Hole Cast-Iron Burner--High Flame--Per Hole............. Coffee Urn--Large, 18 in. Diameter--Single Drum...................... . Coffee Urn--Small, 12 in. Diameter--Single Drum Coffee Um--Per Gallon of Rated Capacity......... Egg Boiler--Per Egg Compartment................................... Steam Table or Serving Table--Per Square Foot of Top Surface___ _ .. Dish Warmer--Per Square Foot of Shelf Cigar Lighter--Continuous Flame Type........................................................... __ ___ Bunsen Type Burner--Large--Natural Gas Bunsen Type Burner--Large--Artificial Gas.......... Bunsen Type Burner--Small--Natural Gas.......................................... ....................... Bunacn Type Burner--Small--Artificial Gas Weisbach Burner--Natural Gas. Fish-tail Burner--Natural Gaa Fish-tail Burner--Artificial Gaa Lighting Fixture Outlet--Large. 3 Mantle 480 C.P.--__ '> .. Lighting Fixture Outlet--Small, 1 Mantle 160 C.P____ _______ _.. One Cubic Foot of Natural Gas Generates One Cubic Foot of Artificial Gas Generates .:.......................................................... One Cubic Foot of Producer Gas Generates........ -...................................................... 90% 67% 50% 9000 12000 50*00 * * * * * * * 5000 3000 600 2500 400 540 2250 2250 * * * * * * * * 4500 2250 900 540 135 10% 33% 50% 1000 6000 5000 * ** * *' * .* * 5000 3000 500 2500 900 60 250 250 * * * * * * 500 250 100 60 15 100% 100% 10000 18000 10000 12000 10000 18000 250 100000 * 100 250 2500 10000 6000 1000 5000 1300 600 2500 2500 5000 3000 3000 1800, 3000 5000 3000 5000 2500 1000 600 150 Steam Heated Equipment Insulated Surface, Per Square Foot........................... Steam Table--Per Square Foot of Top Surface 330 0 330 130 0 130 - _____ ________ 80 0 80 400 0 400 220 0 220 110 0 110 2000 2000 4000 1200 1200 ' 2400 2500 2500 5000 300 800 1100 Miscellaneous Heat Liberated from Hot Water used direct and on towels per hour--Barber Shops 30 1 30 1 60 100 | 200 1 300 *Per cent sensible and latent heat depends upon use of equipment; dry beat, baking or boiling. 160 Chapter 8. Cooling Load GENERAL From the foregoing discussion it is obvious that the determination of the maximum cooling load is rather complicated by reason of the variable pature of contributing load components. If the time when the maximum load occurs is not obvious the load should be calculated for various times of the day to determine the probable time ait which the sum of the various component loads is a maximum. Application of the foregoing data in determining cooling load require ments is illustrated in Example 1. Fig. 3. Plan Diagram of Clothing Store Example 1. Determine cooling load requirements for a clothing store illustrated in Fig. 3 and located in Cleveland, Ohio, Latitude 40 deg. This is a one-story building located on a corner and it faces south and west. Assume building on east and north sides conditioned. Wall construction, 8 in. hollow tile, 4 in. brick veneer, plaster on walls, U = 0.33 (Table 4, Wall 38 B, Chapter 5). Roof construction, 2 in. concrete, Yi in. rigid insulation, metal lath and plaster ceiling, U = 0.26 (Table 11, Wall 2 J, Chapter 5). Floor, maple flooring on yellow pine, no ceiling below, U = 0.34 (Table 8, Wall 1 D, Chapter 5). Partition, wood lath and plaster on both sides of studding, U = 0.34 (Table 6, Wall 77 B, Chapter 5). Show windows, provided with awnings and thin panel partition at rear. Front doors, 2 ft 6 in. x 7 ft (glass panelled), U = 1.13 (Table 13 A, Chapter 5). Side door, 3 ft x 7 ft (solid, 1 % in. thick), U = 0.51 (Table 13 B, Chapter 5). Occupancy, 10 clerks, 40 patrons. Lights, 4200 w. Outside design conditions, dry-bulb 95 F; wet-bulb 75 F. Inside design conditions; dry-bulb 80 F; wet-bulb 67 F. Basement temperature, 85 F. Store room temperature, 88 F. - 161