York Navy Systems - Cool Under Pressure Chilled Water Plant with Magnetic Bearing Compressor 230kW to 550kW Cooling Capacity MWCC MB M0 230-550 • Centrifugal compressor with High speed motor mounted on magnetic bearings. • Motor driven by a variable frequency drive. • No inrush current (Ir/In < 1) • Cooling capacity from 230kW to 550kW • Totally oil free system • Very low noise and vibrations • Shock tested • Falling film evaporator and seawater condenser • Designed to comply with relevant MIL-STD • Calculated MTBF : 63000 hrs • No sea water three-ways valve • No heat rejection • Chilled water or sea water pumps can be fitted on the unit * Dimensions Di i could ld b be adapted d t d Not contractual - Data subject to change www.johnsoncontrols.com/marine York Navy Systems - Cool Under Pressure Centrifugal Compressor on Magnetic Bearings The concept of this semi-hermetic compressor is to have a high speed motor with the compressor impeller mounted directly on the motor shaft. The synchronous motor with permanent magnets runs on magnetic bearings and is driven by a variable frequency drive. Capacity control system The variable speed motor and the variable gap diffuser (VGD) modulate the chiller capacity within the range from 100% to roughly 15% of the nominal capacity. When the speed of the compressor cannot decrease further due to the cooling water temperature, the VGD closes little by little to adjust the gas flow through the compressor to meet the required cooling capacity. In addition, a hot gaz by-pass solenoid valve allows the chiller to obtain a very low load capacity if necessary. Motor casing could be made of stainless steel or aluminium. Heat exchangers Designed according the "state of the art" our heat exchangers play as a rigid structure so no base frame needed. Our condenser is fitted with Copper-Nickel tubes (90/10 or 70/30). Other materials are available upon request including, stainless steel, titanium... Our unit is fitted with a « falling film » evaporator capable of reducing the quantity of cooling fluid in the evaporator and therefore its size. Chilled Water Plant Cooling Station The cooling station supplies water around 20°C to cool the electrical panel and the frequency inventers. There is no heat rejection from our unit in the engine room. Some References... - Italian Navy FREMM Frigates - French Navy SSBN & SSN Class Submarines - French Navy FAA & FASM Frigates - Royal Navy SSN Astute 4 & 5 submarines - German Navy F122, F123 & F125 Frigates Contact York Navy Sytems France: Carquefou - Phone +33 2 40 30 63 68 India: Pune - Phone +91 2066067100 UK: Basildon - Phone +44 1268 246 155 U.S.A: York (Pennsylvania) - Phone +1 717 4950266 [email protected] www.johnsoncontrols.com/marine