After 46 years, Virginia’s Newport News Shipbuilding is replacing its gantry crane with a state-of-the-art, 315-metric ton, 241-feet tall electronic model, designed by Kocks Crane, Bremen, Germany. Set to operate 24/7, the crane requires an effective HVAC system, one that can keep the crane’s operational room cold, no matter the outside conditions. The engineer’s choice: CITY MULTI® from METUS, installed by Warwick Mechanical Group, Newport News, Virginia. Warwick has a long-standing relationship with the shipyard and is one of the most experienced VRF mechanical contractors in the state. Selected as the HVAC distributor, APG’s Matt Kemp and Mark Goff speak about the project below and explain why Mitsubishi Electric was the right system for this unique job.
This is a unique application. How did APG get involved and what is the purpose of the crane?
MG: APG was sought out by the engineering firm working on the HVAC design. They were looking to use a Variable Refrigerant Flow (VRF) system due to the simplicity of installation on a ductless system. Essentially, the equipment conditions what you can equate to a giant server room of electronics. The system cools the electronics that operate the entire machine – the crane actually travels down the pier, lifting large sections of the aircraft carrier into place for final assembly.
What specific equipment was installed?
MG: Mitsubishi Electric’s Y-Series was installed. There are two systems – each has an outdoor condensing unit and three indoor units, which are the four-way ceiling cassettes. The cassettes blow the conditioned air in four directions to properly distribute the cooling. The space is not occupied by people generally, but there is a high electrical heat load to account for. In addition, there are thermostats within the space and the AE-200 Centralized Controller. With the Centralized Controller, the entire system can be monitored and adjusted remotely via laptop or desktop.
Why was Mitsubishi Electric the right system for this job?
MK: This project really shows the flexibility of Mitsubishi Electric equipment. We’ve got a remote, mounted condenser in a constantly moving environment. The ability to install the condensers on the legs of the crane and keep them in relatively close distance to the spaces they’re serving just shows that VRF can be effective for a unique, 24/7 operation. We consider this project a critical-cooling application.
MG: If that room was to overheat, the whole crane would shut down – and that’s a problem when you’ve got millions of dollars invested in this type of equipment. Critical is definitely the right word. The technicians at Warwick have my cell number if they experience any issues or run into any problems. At APG, we’re excited about this project and are here to support our clients any way we can.
METUS Equipment Installed:
- (2) PUHY-P144TLMU-A-BS: Y-Series Salt-Protected Outdoor Units
- (6) PLFY-EP48NEMU-E: 4-Way Ceiling Cassettes
- (2) PAR-32MAA-J: Wired MA Remote Controllers
- (1) AE-200A: Centralized Controller