BATTELLE MEMORIAL INST COLUMBUS OHIO COLUMBUS LABS
The purpose of the test program was to establish the amount of heat required to maintain the interior of the Mark I PTC at a comfortable level for divers. The test showed that for a condition of moderate forced convection at 810 feet equivalent internal pressure, a heat input of 1620 Bhr 0.48 kw is required for each degree of temperature differential that is to be maintained between the interior of the PTC and the outside seawater. Thus, if an interior temperature of 90 F is desired in 40 F water, this would require a total heat input of 81,000 Bhr 24 kw. These results are valid only for a condition of forced convection similar to the test situation. Although the heat requirement seems quite high, it is only equivalent to the air-conditioning load in a modern automobile.