This investigation also included an estimate of installed Navy air 

 conditioning and refrigeration/equipment cooling tonnage that employs 

 air-cooled condensers." Results are reported herein. In summary, an 

 average annual saving of $15.7 million can be made; the average pay-out 

 is 3.8 years for all environments; and an estimated annual electrical 

 energy saving equivalent to 3.2 x 10 6 million Btu's could result, reducing 

 the Navy's fuel oil dependency by almost 1,500 barrels per day. 



Several conclusions are made as a result of this investigation: 



1. CEL should develop an interdisciplinary program to continue 

 research on air-cooled condenser design criteria. 



2. Because cost-effective condenser designs for severe atmospheric 

 exposures and areas of high energy costs are not necessarily cost- 

 effective under other conditions, an air conditioning "tropicalization" 

 specification may be appropriate. 



3. Higher performance condensers should be considered for existing 

 cooling units when condensers are replaced. For new units, any special 

 Navy-specified condenser should be supplied with the equipment; field 

 retrofit is not practical. 



4. Condenser specifications that are cost-effective cannot be 

 developed without consideration of industry standards and fabrication 

 practices . 



5. If materials, fabrication method, and coating specified are 

 commercially available, industry can quote costs on high performance, 

 Navy-specification condensers. 



6. Frequency of coil washing has a significant effect (as high as 

 25%) on the power cost factor, and the estimates made herein are based 

 on regular washing. 



^Copy of "The Status of Research and Development for Improving the 

 Long-Term Performance of Air-Cooled Condensers in Marine Environments,' 

 by Richard A. Boettcher. 



30 



