Document Loy6qgdmmkm8140EJ5aMK6d5X

HEATINC VENTILATING AIR CONDITIONING CUIDE 1944 Table 1. Typical Heating and Ventilation Practices for Ships Type of Ventilation Crews Quarters- Toilets and Showers.-- Chart House___________ Passenger & Officers Qtrs. Office & Similar Spaces..... Mess Rooms........................ Sup. Mech. Nat. Mech. Mech. Mech. Mech. Exh. Mech. or Nat. Mech. Mech. or Nat. Mech. or Nat. Mech. or Nat. Mech. or Nat. Type OF Heating H.B.a or DK..b D.R. H.B. or D.k. H.B. or D.k. H.B. or D.R. H.B. or D.k. Air Change MINVTES 5-6 3-4 5-6 4-6 - 5-6 4-6 May be exhausted through galleys and Pantries. Dining Salons.. Mech. Mech. or Nat. H.B. or D.R. Galley and Pantry.... _ Deck Pantries (No cook ing Equipment)........ . Stores Spaces (Adjac to Living Quarters).. Locations)------------Hospital Spaces----- .... Mech. & Nat. Mech. & Nat. Mech. or Nat. Mech. Mech. Mech. H.B. Mech. Nat. or Mech. Nat. or H.B. or D;K. Mech. H.B. or D.R. Lockers.. Shops._____ Nat Mech. Group Berthing Spaces.. _ Mech. CO Bottle Space....... .. Nat. Battery Room-------------- Nat. Laundryv----- ---- ------------ Mech. Mech. or Nat. Mech. or Nat. Mech-. Mech. Mech. H.B. Or D;K. H.B. or D.K. . D.R. H.B. Dry Cargo Holds............ Mech. or Nat. Stearing Gear Space----- ... Mech. or Nat. . Dry Stores.............. ........ ... Mech. Gyro Room................-- Mech. Theaters and Halls.------ ... Mech. Passageways... Nat. Nat. or Mech. Mech. or Nat. Nat. or Mech. Nat. or Mech. Nat. or Mech. Nat. H.B. or D.R. H.B. or D.K. D.R. .... Mech. or Nat. Misc. Machinery----- --- ... Mech. or Nat. Resistor Spaces.--.-------- Nat. Stair Wells........................ ,,. Nat. Mech. or Nat. Mech. or Nat. Mech. Nat. D.R. Maybe 3-6 exhausted through galleys and Pantries. 1-2 Tempered air Sup. 3-6 15-20 15-30 4 15-20 6-10 3-6 10 2- 1t4 . Tempered air Sup. 20-30 2-6 6-10 Unit Heater if desired. 3-6 6-8 Exhausting or Supplying ad jacent Quarters. 1-2 2-4 10 Same as pas sageways. Exh. at top. H. B.--Hot Blast System. sd. R.--Direct Radiation. 842 CHAPTER 49. MARINE HEATING AND VENTILATION during periods while in port. Such spaces should be equipped so as to heat them to about 50 F during such periods. Living Spaces The minimum quantity of air required for any space which is fitted for sleeping or office work, including hospital spaces, should be that which will limit the temperature rise over the outside air conditions to not more than 10 F (a rise of 7 F is more satisfactory if practicable), or a minimum of 30 cfm per person, whichever is the greater. For spaces fitted for eating, recreation, or manual work the rise may be taken at 10 F with not less than 20 cfm per person. It will be noted' that the quantities thus obtained are minimum and should be supplied by mechanical means. This is especially important if the spaces are located inside of the ship and have no direct weather exposures with ample openings, such as portholes or windows, which may remain open even in inclement weather. The same-requirement applies to the necessity for mechanical exhaust, although natural exhaust may be used where only a short run of duct is required. If the air to these spaces is supplied by mechanical ventilation it should enter through registers or diffusing type terminals. The installation of bracket fans within these compartments at proper locations and of suf ficient number will aid materially in providing proper distribution for comfort. Heat should be furnished to these spaces to maintain the following temperatures when operating in the minimum winter conditions: Staterooms, Berthing, Messing and Office spaces!. 70 F Working spaces and Shops___________ .60 F Hospital spaces___ _______________________ 1__________________ 75 to 78 F Toilets, Washrooms, Showers and Baths Spaces for this purpose should be fitted with mechanical exhaust venti lation for odor and steam removal. They should have one or more well located exhaust terminals overhead; one will usually suffice for the average size space. The supply may be taken naturally. Generally, the surrounding living or working spaces are exhausted through them. The minimum total quantity exhausted should be that which wouldchange the air within the compartment in 6 min, plus 25 cfm for each fixture, plus 50 cfm for each shower head. Air requirements on merchant vessels are commonly estimated on the basis of a 4-min rate of change. Heating should be obtained by use of convection-type heaters which should maintain 70 to 80 F for bathing or washing spaces and 70 F for toilet spaces when the outside winter temperature is at the design condition. Galleys, Bakeries, and Food Handling Spaces The problem of the ventilation of spaces fitted for cooking and food preparation.is primarily one of heat and smoke or fume removal. Me chanical exhaust is always required for this purpose.. The supply may be natural, but the required exhaust capacity will be most satisfactory if arranged for 50 pier cent mechanical and 50 per cent natural. The exhaust quantities are generally large and may be predicated on ijSestricting the ambient temperature rise to about 15 F over the.outside 843