t fa Temperature of thimble base, Figure 2 (°F) 



t m Temperature of surface thermoelectric unit (°F) 



t w Water temperature 



'wa Ambient water temperature 



x Dimension in direction of heat flow 



6 Thermal coefficient of expansion of seawater (V 1 ) 



At Temperature difference, metal surface to water (°F) 



U Viscosity, lb/(ft)(hr) 



P Density of seawater (lb/ft^) 



48 



