York Navy Systems has designed a prototype compressor for a new generation of high-efficiency shipboard chillers for the US Navy fleet that the company says can reduce fuel consumption by 25 percent.
Chillers provide cooling for ship weapons, command and control systems and crew comfort. Navy chillers must be designed for 35 to 50 years of service during which they will be exposed to extreme environments such as weapons-effect shock, heavy-weather ship vibration, and temperatures ranging from the Arctic to tropical locations, York says.
The Navy’s goals for the next-generation chillers are to:
- Reduce fuel consumption by 25 percent and maintenance by at least 50 percent.
- Increase cooling density by 50 percent and reliability by at least 200 percent.
- Meet environmental objectives by cutting refrigerant leakage by 90 percent.
York says that its new units, which are based on variable speed, economized two-stage compressors with oil-free magnetic bearings and high-speed permanent magnet motors, meet these goals.
Currently more than 90 percent of the vessels in the US Navy fleet use York air conditioning and refrigeration equipment.
The Energy Policy Act of 2005 mandates that federal agencies, including the Navy, reduce their energy consumption 30 percent by 2015, based on a baseline year of 2003.
In 2010, the Navy implemented several sustainability projects aimed at reducing energy consumption ranging from testing experimental technologies to replacing light bulbs at a ballpark.