What is & How To Do it

Acoustic Cleaners for Gas boilers and Diesel engine's aircoolers

primasound3 Having Trouble with Gas boilers and Diesel engine's aircoolers ?

The PrimaSound Acoustic Cleaner will Solve your Problems.
Acoustic Cleaners are low frequency, high powered horns designed as a highly effective, economical means of preventing build-up in industrial applications.

floating-hook The floating block connection part visual inspection to be done carefully
1. The swivel bolt and lock-nut and spring pin visual inspection to be done.
1.1 Every year : to be inspected by annual safety surveyor
1.2 Every month : visual check by ship's crew

Infomarine On-Line Technical Library
File	Description	File size
Lifeboat_Davit_Floating_Block_Inspection_&_Related_Regualtions_20110602.pdf	Lifeboat_Davit Floating Block Inspection &_Related Regualtions	234 Kb

PROPELLER & HULL ROUGHNESS

polishing Hull roughness, surface roughness & Propeller roughness – some definitions. As “roughness” is not just roughness, definitions of some relevant types of roughness might come in handy.

The instrument to measuring hull roughness is The BSRA Roughness Gauge. The instrument measures the Average Hull Roughness (AHR), which is defined as the average of minimum 100 measurements of Mean Hull Roughness (MHR). MHR is the average of highest peak to lowest trough in 50 mm measuring length. MHR is comparable to “Average Rmax” or Rtm.

Infomarine On-Line Technical Library
File	Description	File size
Propeller_hull_roughness.pdf	Hull roughness, surface roughness & Propeller roughness – some definitions	43 Kb

Variable Turbine Geometry technology is the next generation in turbocharger technology where the turbo uses variable vanes to control exhaust flow against the turbine blades. See, the problem with the turbocharger that we’ve all come to know and love is that big turbos do not work well at slow engine speeds, while small turbos are fast to spool but run out of steam pretty quick. So how do VTG turbos solve this problem?

Picture a shipboard radar display, with overlaid electronic chart data, that includes a mark for every significant ship within radio range, each as desired with a velocity vector (indicating speed and heading). Each ship "mark" could reflect the actual size of the ship, with position to GPS or differential GPS accuracy. By "clicking" on a ship mark, you could learn the ship name, course and speed, classification, call sign, registration number, MMSI, and other information.

Thermostatic Expansion Valve or TEV

Thermostatic expansion valve is one of the most commonly used throttling devices in the refrigeration and air conditioning systems. Let us see the details of this valve that automatically maintains the flow of the refrigerant inside the evaporator.
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What is Anti Heeling Control System (AHCS)?

The Anti Heeling Control system is used to detect the healing angle of the vessel and to rebalance the ship automatically by pumping ballast water from starboard to port or vice versa.

The system can operate with reversible or non reversible pumps, using remote controlled valves to derect the ballast water flow. The complete system inclide the master and optional the slave electronic unit, the mounting plate with heeling sensor, the pump starter panel, the pump and two level switches for low tank level.

Shaft alignment calculaton service may be provided subject to submission of necessary information.
Reliability of shaft alignment calculations depends on completeness and accuracy of propulsion shafting modeling.
Shaft alignment designer should have complete information to model propulsion shafting properly.

Infomarine On-Line Technical Library
File	Description	File size
shaft-alignment-clculation.pdf	Shaft alignment designer should have complete information to model propulsion shafting properly.	256 Kb
shaft-alignment-calculation.doc	Shaft alignment calculaton service may be provided subject to submission of necessary information.	86 Kb

small_4stroke_sm .Diesel - Engine The gasoline-engine (Otto-engine) wasn't very efficient, that is why 1892 Rudolf Diesel had developed the engine with great efficiency called after him.

It is like the Otto-engine a 4-stroke engine. The main differences are: 1st stroke (Intake): Only air is sucked in.

How EPIRB's work

EPIRBs
Emergency Positioning Indicating Radio Beacons or EPIRBs are compact, buoyant and portable emergency devices specifically designed to transmit a radio distress signal to alert emergency authorities of a need for rescue. Once activated, an EPIRB will continuously transmit a specific radio signal to be detected by satellites. Following satellite detection, the emergency position and specific location data is then relayed to related authorities to begin rescue operations.Several EPIRB models can be owner registered with a relevant rescue co-ordination authority. Following activation, an owner registered EPIRB will provide rescue operators with the owner's name and emergency contact details plus the type of vehicle/vessel needing rescue. EPIRB registration greatly improves rescue response times.

Ships are always surrounded by literally unlimited quantity of water, except perhaps when undergoing drydock repairs. Since there are human beings on board on all types of ships, we certainly need drinking water on board. We have already studied about the machine known as the fresh water generator which is used to produce pure water out of the salty sea water.
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