NAVSEA Eliminates CFCs Onboard Carriers

Monday, April 06, 2009

All U.S. Navy aircraft carriers are now chlorofluorocarbon (CFC)-free.  Naval Sea Systems Command (NAVSEA)’s Shipboard Ozone Depleting Substances (ODS) Elimination Program marked a major environmental milestone April 2 with the elimination of the final ozone depleting CFC refrigerants aboard the aircraft carrier USS Carl Vinson (CVN 70). 

“NAVSEA is eliminating these CFC refrigerants because they deplete the earth’s protective ozone layer which screens out potentially harmful radiation from the sun,” said Gregory Toms, NAVSEA ODS elimination program manager.

NAVSEA strives to be a good steward of the environment while building the future Navy and sustaining the current fleet.  Currently Carl Vinson is nearing completion of a Refueling Complex Overhaul.  When the ship returns to the fleet later this year, it will have 10 air-conditioning plants and five refrigeration plants that have been converted from CFC refrigerants to non-ozone depleting hydrofluorocarbon (HFC) refrigerants. 

Carl Vinson joins the other eight CVNs built prior to USS Ronald Reagan (CVN 76) that have now all been converted to ozone-friendly refrigerants.  Starting with Ronald Reagan, all new aircraft carriers are built without CFC refrigerants.

“The primary purpose of these CVN refrigerant conversions was to eliminate the nearly one million pounds of CFC refrigerants that would have otherwise been emitted to the atmosphere over the remaining ships’ service years,” said Toms. 

In addition to being ozone depleting substances, these refrigerants are also potent greenhouse gases.  Although the HFC refrigerants replacing the CFCs are also greenhouse gases, they have lower global warming potentials which drastically reduce their impact on the earth’s climate. The reduced climate impact from the CVN 70 refrigerant conversions alone are equivalent to eliminating the greenhouse gas emissions from the burning of more than 38 railcars of coal every year.  When all of the CVN refrigerant conversions are accounted for, the annual emission reductions are equivalent to 325 railcars of coal.

The conversions also have several other important operational advantages including reduced acoustic signature, increased cooling capacity in areas of the world with high seawater temperatures, decreased logistics support and training requirements, simplified troubleshooting procedures, and increased reliability.  These conversions also support energy and environmental goals to reduce greenhouse gas emissions and increase energy efficiency.

NAVSEA researchers and engineers also worked closely with the original equipment manufacturer to improve the energy efficiency of the air-conditioning plants as part of the conversion process.  Using state of the art electronic control systems and compressor improvements, the converted HFC plants are up to 15% more energy efficient than they were prior to the conversions.

Another major milestone will be reached in 2010 when all shipboard refrigeration plant conversions are completed.  Because the air-conditioning conversions must be completed during major ship maintenance availabilities these conversions are scheduled to continue through 2017.

(Source: Naval Sea Systems Command Office)

Maritime Reporter March 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

News

Gulf Bridge Express Service to End

The Gulf Bridge Express Service will shortly be terminated with the last roundtrip voyage being MV Saint Nikolaos voyage 00008S, ETA New Orleans on April 22, 2015.

Obangame Express 2015 Concludes in the Gulf of Guinea

Maritime forces from Gulf of Guinea nations, Europe, South America, and the United States and several regional and international organizations concluded the multinational maritime exercise,

Scandlines Ferry Back in Service by End June

The damaged Scandlines ferry M/V Prinsesse Benedikte is being repaired at the Polish shipyard Remontowa and is expected to be ready before the end of June 2015.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Naval Architecture Navigation Offshore Oil Pod Propulsion Port Authority Ship Electronics Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1480 sec (7 req/sec)