SPECIAL FOCUS THE MARINE INDUSTRY
Cressall Resistors is conducting research into the use of its EV2
watercooled resistors to maintain and test the generators used on yachts. Simone
Bruckner, managing director, comments
T
he popularity of luxury yachts is continuing to grow, with over 700 vessels for sale at any one time. There are three types available: a typical yacht will measure between 40 and 100ft, a megayacht will be 100 to 200ft, and a superyacht is anything above this. These vessels feature a
variety of onboard equipment, including air conditioning, fridges and lighting. However, like in the home or factory, these devices don’t run constantly – there are usually peak times and low energy consumption periods. This means generators on yachts will often run at only 30% of their full load. However, running a diesel generator
at low speed or load over prolonged periods can lead to carbon build-up and internal glazing, which can cause serious operational problems such as decreased
The compact EV2 can be used as a dummy load resistor to replicate a full electrical load on the vessel's generator
Generating ideas to keep yachts on the move
reliability and increased running costs. It can also result in the generator belching out smoke. If the problem remains unresolved, the generator will eventually fail to start and a new one will have to be purchased – a costly issue that could put the yachts out of action for a time. Vessel owners must therefore maintain their generator properly, by bringing it up to a full load regularly. To help, Cressall is currently conducting research into using its EV2 resistors to maintain and test the generators on yachts.
A COMPACT DEVICE The EV2 can be used as a dummy load resistor to replicate a full electrical load on the vessel's generator. It will also dissipate the energy from the generator as heat into the cooling water, and this can in turn be used to heat water for the hot water tank.
The EV2 resistor is lighter and smaller
than some other methods used to maintain generators, which involve switchgears, an inverter, controls and
Cressall Resistors T: 0116 273 3633
www.cressall.com
DNV GL APPROVED SENSORS
Several models of TE Connectivity’s pressure sensors have received DNV GL type approval to complement its established ABS certification in addressing marine and offshore applications. ABS and DNV GL approved pressure sensors are suitable for a range of applications for ships, barges, offshore oil platforms and desalination. The pressure transducers are approved for gauge, absolute and differential pressure measurement applications in hazardous and non-hazardous environments. They can be constructed with materials including 316L stainless steel and
nickel alloys, and flush diaphragms are available. According to the company, the approval confirms that
the sensors are compliant to their manufacturing rules, with suitable facilities for product manufacturing, testing and inspection; methods for constant monitoring of product quality; and qualified manufacturing personnel.
TE Connectivity
www.astsensors.com BVM 32 APRIL 2016 | DESIGN SOLUTIONS
www.bvm.co.uk SOLUTIONS FOR THE MARINE INDUSTRY
Two new PanelPCs, a 19 and a 22in version, plus an SBOX-100 embedded system, have been launched by BWM for the marine industry. According to the company, these are primarily designed for applications on ships’ bridges for navigation and communications and in control rooms for propulsion control, ship automation and machinery control and monitoring systems. They are, however, also suitable for other industrial and transport applications. The PanelPCs have 1920 x 1080 pixel projected capacitive touchscreens with wide
viewing angles and optional enhanced visibility in direct sunlight. The SBOX-100 embedded system stores and processes the data and act as a communications hub, accepting inputs from a range of sources. There is also extensive serial I/O. The new products support iRIS, Independent Remote Monitoring and Control, an
IPMI compatible interface which provides a powerful software suite enabling the control and management of physically remote or inaccessible systems from a central location via Ethernet. They are based on 4th Generation Intel i5-4400E processors running under the QM87 chipset at 2.7GHz with 4GB of 1600 MHz DDR3 DRAM.
large additional batteries. This is especially beneficial for the yachting industry, where space is limited. To store enough reserve power for a yacht application, you would have to use batteries approximately six times bigger than a single EV2. Moreover, in a traditional set-up when batteries are fully charged and cannot store any more power, you would still need a resistor to dissipate the excess energy and protect the generator. Similarly, any extra weight means the yacht engine has to work harder to move the vessel, using more fuel and causing more wear to engine components. Of additional benefit, the EV2 is
suited to marine applications in which moisture, humidity and salt pose problems to electrical devices. The resistor has a rugged silicone rubber outer skin, giving the EV2 an ingress protection of IP56. This means that even powerful water jets cannot penetrate the device. The EV2 could therefore play a key role in maintaining yacht generators as a complete on board package.
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