Linked below is an article written by ASHRAE that discusses the major energy savings associated with deep water cooling. This article looks at Cornell University where they were able to reduce their cooling energy use by 86%. They utilized an inland lake, however similar technology is being developed for Honolulu with similar savings anticipated. In addition to huge energy savings, the system life of mechanical equipment nearly triples, and on-going maintenance is reduced.
The system at Cornell University has been in operation for over 12 years, providing 16,000 tons of cooling, approximating to about 6,400,000 square feet of conditioned space. The development in Honolulu is anticipated to be 25,000 tons. What an awesome use of our natural resources in times of rising electricity costs!
Cornell University Deep Water Cooling