TABLE 9.1 THE "STANDARD MAN" FOR LIFE SUPPORT SYSTEM DESIGN COMPUTATIONS 



[FROM REF. (1)] 



Item 



Quantity 



Units 



Oxygen Consumption 



Respired Air 



Drinl(ing Water 



Food, Dry 



Respiration Quotient 



CO2 Produced 



Water Vapor Produced 



Urine 



Feces 



Flatus 



Heat Output 



Sensible 



Latent 



M 



0.9 

 18. 



6 



1.4 

 .85 

 .77 



4 



4 



0.4 



0.1 



250 

 220 



FtVhrat 7G0mm Hg 



Ft^/hr at 760 mm Hg 



Pounds/day 



Pounds/day 



Volume of COt produced to Oo consumed 



Ft^/hr at 760 mm Hg 



Lb/day 



Lbs/day 



Lb/day 



Ft'/day 



Btu/hr 

 Btu/hr 



Total 



470 



Btu/hr 



work; this does not take into account the 

 likelihood of increased oxygen consumption 

 and carbon dioxide production under stress 

 conditions. 



While a healthy individual's survival re- 

 quirements and metabolism may vary quan- 

 titatively from those of the standard man, 

 they do not vary qualitatively, and because 

 of the biological commonality from person-to- 

 person, all submersible life support systems 

 supply the following: Oxygen replenishment 

 and carbon dioxide removal. Some vehicles 

 have the means to remove atmospheric con- 

 taminants other than carbon dioxide, such as 

 carbon monoxide and other gasses which fall 

 under the category of trace contaminants. 

 Only a few have the means to control tem- 

 perature and humidity within the pressure 

 hull. On the other hand, all can accommodate 

 a lunch bag and thermos to supply food and 

 water, and all have some means of storing 



human wastes. If these requirements are 

 tabulated, the following is necessary to 

 maintain a viable environment in a submers- 

 ible: 



Replenishment: Oxygen 



Food/Water 

 Emergency Air 



Removal: Carbon Dioxide 



Trace Contaminants 

 Human Wastes 



Control; Temperature* 



Humidity* 

 Monitoring Devices 



The emergency air supply in submersibles 

 is dealt with in Chapter 14 and is not dis- 

 cussed further here. Preliminary, however, 

 to a discussion of the above factors is the 

 length of submergence, and Table 9.2 shows 

 that the build-up of atmospheric contami- 

 nants which can be tolerated is directly re- 



410 



