Table 2. Calculating the Effects of At in Shallow 

 Seawater Tests (Independent variable; 

 surface temperature, t ) 



Assumed 



Surface 



Temperature, 



t„ 



(°F) 



At 

 (°F) 



At'- 

 w 



h a 



nean 



Q/W.0. b 



Fins 



(Base area 



of fin) 



Fin Area 

 Ratio, R 

 to Reject^ 

 8,850 Btu" 



160 



120 



3.31 



110 



5,000 



1.76 



80 



40 



2.52 



84 



1,270 



6-95 



120 



80 



2.99 



100 



3,020 



2.92 



200 



160 



3.55 



118 



7,200 



1.22 



2A0 d 



200 



3.76 



125 



9,450 



0.93 



Based on Approximation 



= h 



160Ut 16 



1/4 



e.g. , for t 



80, h 



80 



(11 



°>(M) 



= no l--±- 



(,",) 



84 



Based on Q = h AAt, where A = 0.378. 



D 



R. is defined here as surface area ratio of a particular 

 fin system to a plain cylinder of same root dianeter, with 

 average surface temperature as shown. 



Valid approximation at depth in ocean. In shallow water, 

 boiling would keep t below about 216 F. 



33 



