Research vessels can provide a number of services, including: water and air quality measurements, seabed mapping, underwater studies with remote control vehicles, trawling. Our engineers have a good few experience in r/v vessels like the one above.
This concept vessel is distinguished with its special facilities: stern hydraulic transtainer and side telescopic crane for launching probes underwater (Launch and Recovery System) at SB.
Sulphur oxides as major pollutants from the burning of marine Heavy Fuel Oil are a great deal reduced nowadays. Apart from the fact that permitted percentage of sulphur in fuel in Emission Control Area (i.a. Baltic Sea) is 0,1%, IMO has specified limit of 0,5% for whole world from 2020. This must be taken into account by all of the ship owners and operators.
The simplest solution is to shift into low-sulphur marine gas oil. However, MGO is approximately three times more expensive than HFO. This situation is likely to be even worse when it comes to growing demand.
Exhaust Gas Cleaning Systems so-called „scrubbers” are getting more and more popular as long-term cheaper, adequately reliable and approved alternative.
Naval-Tec has designed hybrid Scrubber concept project designeted for cruise vessel. Any installation like that requires significant works on vessel systems i.a.: piping, electric, fire integration and structural. Naval-Tec is able to provide you with all necessary engineering documentation as well as support during selection of scrubber supplier, shipyard, installation and commisioning.
Fishing vessels are Naval-Tec's strong point. The one above is fully designed stern trawler destined to saltwater fishing. Main designation is commercial fishing but may be also used on artisanal purpose.
This vessel is ready for midwater and bottom trawling on the basis. Pair trawling isn't excluded. An user can take advantage of two winches and optimal size 36m, width 9m. Issued ship comply with DNV-GL rules, but can be adjusted to any other classification society.
Naval-Tec Engineering was requested to check mechanical stress of hull section loaded with crane of SWL 3.4t.
We designed very detaily the steel structure. It gives reliable base for the simulation and isn't that time-consuming. The main challenge was to copy an impact from the crane to hull adequately. It was necessary to specify forces in many points with different value in x, y, z direction. We also made some adjustements to trace acceleration that may occur on the vessel.
Conclusions of simulation were: satisfying stress safety factor and low displacement.
Where is the mass there we need hard ground. Heavy equipment needs hard place to stand. Here starts our journey from Device specyfication like Footprint, Mass, Forces to calculations then to foundation design his detail and under deck construction.
It all Happens under the watchful eye of people who deal with a strenght calculations.
A sample of Naval-Tec Ballast Water Treatment System is presented above. This one uses chlorine to purge water from microorganisms before they arrive to water tanks. The biggest advantage of this sample is that chlorine mostly comes from BWTS electrolysis reactor which produces chlorine from sea water. We can also specify other types based on: Ultra Violet, Micro Vibration, Ozone or Chemical Injection.
The decision of system type is based on a few parameters. The most impartant are: ballast water Pumps Capacity, Area Of Operation of a ship, Space Available in a ship and Current Ballast Water System Design including number of discharges & intakes.
As a design office, we offer consulting and design of implementing ballast water treatment system.
Doubled redundancy is very often required by class in crucial air supply or exhaust. System must be prepared for operation even in case of failure of one fan.
As fans are installed in parallel, plain obstacle occur. When one of the fans is idle then the air supplied by another fan is likely to circulate round a closed loop because of pressure circumstance. A device which prevents air backflow is called Non-Return Damper. It is mostly operated by counter-weight or spring force. This is very convenient as any external power is not needed.
Our designers were involved in rail design. This job included basic design and workshop documentation. Following specified rules was a crucial issue.
This is a design of a single container prepared for living. Such container can be considered to be a simple increase of crew accommodation. Another advantage is that this solution could be used temporarily as well as permanently.
The main challenge is to connect hydraulic and electric installations with a vessel's. Air-Conditioning is self-contained and requires just electrical power. Fresh water and sewage are combined with the vessel piping systems.
Safety regulations are applied and given the highest priority. A container like that could also be successfully used at quayside.
Difficulties with efficient operation of bilge water systems are considered.
There are even known international law violations regarding bilge water. Below is a proposal of system that increases efficiency of bilge water pumped out overboard.
Non-oiled waters are directed from the ship's engine room equipment directly to the "clean" bilge water tank. Oily waters are directed to the heated pre-separation tank.
Oil pollution drained to the sludge tank. The water from the pre-separation tank is directed to the "black" bilge water tank.
Water from the "clean" or "black" bilge water tank pumped through the oil separator is removed overboard the ship, and dirt from the oil separator is directed to the slurry tank.