Daikin Chiller Technology Improves Climate for Learning at Flagler College
The centerpiece of Flagler College is the grand Ponce de Léon Hall, a former luxury resort hotel now listed on the National Register of Historic Places.
As part of a recent renovation at Flagler College in St. Augustine, FL, an innovative new air conditioning chiller was installed in Kenan Hall, the main academic building of the campus. Because this 50,000-square foot building houses classrooms, lecture halls, and faculty offices, it was important to maintain the quiet atmosphere while trying to reduce energy costs.
About Flagler Collegue’s
Located on 19 acres, the centerpiece of which is the grand Ponce de Léon Hall, a former luxury resort hotel now listed on the National Register of Historic Places.
“The first priority for the college was saving electrical energy costs. The second priority was longevity for the chiller itself and for the refrigerant in the chiller. The Daikin chiller is a positive pressure machine using R-134a refrigerant, which has no phaseout schedule. Overall we anticipate a quick payback.” According to David Hardesty of W. W. Gay Mechanical, Inc.
Phase I of the renovation included replacing an old inefficient chiller in portions of the building originally constructed in 1888. A new Daikin 150-ton Magnitude® magnetic bearing compressor chiller was installed to deliver both energy savings and ultra-quiet operation. The Magnitude chiller provides high energy efficiency with part load performance as low as 0.375 kW per ton by eliminating the high friction losses of typical centrifugal compressors. Variable frequency drives and digital controls further improve efficiency through the entire operating range.
“This is the first Magnitude chiller to be installed in northeast Florida and only the second in the entire state,”said Clarke Story of Brooks Air Systems, the Daikin representative firm in Jacksonville.
The magnetic bearings of the Magnitude chiller’s compressor eliminate bearing lubrication and the need for oil heaters, oil coolers, oil pumps and oil pumping.
Daikin 150-ton Magnitude®
Magnetic Bearing Compressor Chiller.
Magnitude is projected to save $25,000 annually compared to the air-cooled reciprocating chiller it replaced. “Between the maintenance savings and the energy savings, the Daikin Magnitude chiller is a good investment.”
– David Hardesty, Mechanical Contractor, W.W. Gay Mechanical, Inc.
New Chiller is Dramatically Quieter than Others
The Magnitude centrifugal compressor chiller was installed next to an older screw compressor chiller and the new chiller is dramatically quieter than the other machine. In fact, when the Daikin Magnitude chiller is running, the pumps in the mechanical room are louder than the chiller.” The magnetic bearings of the Magnitude compressor eliminate the metal-to-metal contact noise of conventional bearings. And the direct drive design means inherently quieter operation because there is no gear noise.
How Much Energy Savings Does the College Anticipate?
“Using the Daikin Energy Analyzer® analysis program, we were able to project annual energy savings of $25,000 a year compared to the air-cooled reciprocating chiller that the Magnitude chiller replaced,” Story said. “In the first 20 years of operation, that would mean more than $500,000 in savings.
Considering that chillers typically operate 30 years or more, the college’s energy savings could be even more significant over the life of the chiller.” said Frank Riggle, owner’s representative for construction on the project.