habitat was approximately 30 SCF/hr (standard cubic feet per hour). The 

 flow rate was manually controlled but was based on measured PO2 levels. 

 A continual stream of the habitat atmosphere was dumped through vents in 

 the entrance trunk to the sea, thus maintaining the habitat pressure at 

 the sea pressure at the trunk vents. 



Carbon dioxide (CO2) generated by the aquanauts was removed by a Baralyme 

 scrubber. The scrubber system consisted of two blowers (one redundant), 

 a Baralyme canister, and associated valves and piping. Habitat gas was 

 forced by the blower through the Baraljmie, where CO2 was absorbed, and 

 the mixture then recirculated to each of the four compartments . The 

 habitat scrubber system was designed to operate 12 hours on a 54-pound 

 cannister. In actual practice, the average cannister maintained accept- 

 able CO2 levels (8 torr or less) for 15 hours. Baralyme resupply from 

 the surface was necessary because of lack of storage space. 



The habitat atmospheric monitoring system, the monitored parameters, and 

 the acceptable parameter limits are shown in Table 1. 



Table 1. TEKTITE II Atmospheric Monitoring Parameters and Equipment 



THERMAL CONTROL 



The thermal control system maintained the atmospheric temperature and 

 humidity, removing heat and excess moisture from the air. Four heat 

 exchangers were used, one per compartment. Connected to each heat 

 ""xchanger was a blower for air circulation, a charcoal filter for odor 



II-5 



