CONCLUSIONS 



1. The design utilizing solid, heavy, short fins on the 12 modules should 

 produce cold junction temperatures in the actual RTG of 70 F or lower in 

 the deep-ocean (cold water), or about 35°F above the aabient temperature. 



2. Tilting of the RTG up to 60 degrees from the vertical does not seriously 

 affect the capability of the convectors to reject the heat produced; 

 therefore, strict verticality will not be a critical requirement in the 

 ocean. 



3. The use of a shroud around the convectors to provide a 'chimney' effect 

 is not justified in terms of efficiency; the elimination of the cold water 

 more than offsets any advantage from increased vertical convection. 



4. The use of a shroud around the convectors to provide mechanical 

 protection from the projecting convectors and other appurtenances such 

 as electrical connectors which might be placed within the convectc;r 

 circle does not materially inhibit heat transfer, and may be justified 

 on the basis of safety in spite of a small decrease in electrical output. 



5. For the flow conditions produced at the power inputs used, the 

 velocities are not hi^h enough to cause washing of the copper surfaces; 

 the use of copper, an optimum material from a heat transfer standpoint, 

 is both justified and highly desirable in this application. 



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