What is a Viscotherm used for?
A viscotherm or viscometer is used to measure the viscosity of fuel oil at the fuel injection system of the engine. It consists of a capillary tube inside of which a gear pump is fitted which rotates at very slow rpm (say 40 rpm).
Why is Viscotherm rpm 40?
A continuous sample of the fuel is pumped at a constant rate through a fine capillary tube. As the flow through the tube is laminar, pressure drop across the tube is proportional to viscosity. In this unit an electric motor drives the gear pump through a reduction gear, at a speed of 40 rpm.
What fuel oil is used on board ships?
HFO or heavy fuel oil is the most widely used type of fuels for commercial vessels. The fuel oil releases energy to rotate the ship propeller or the alternator by burning fuel inside the combustion chamber of the engine or to generate steam inside the boiler.
What is viscosity control system?
The Viscosity Control System ensures a consistent fan pattern – even after idle – through the unique design that circulates heated fluid through the applicator maintaining a consistent nozzle temperature at all times. Programmers define the process temperature and the corresponding process limits in EasyCoat® software.
Why is viscosity important in fuel oil?
Viscosity is one of the most important factors which directly affects combustion quality. A high viscosity fuel oil leads to improper atomisation which in turn leads to incomplete combustion. High viscosity fuel prevents correct atomisation,which takes place in the fuel injectors.
How does viscosity controller work?
Basic Principle of Viscosity Controller A continuous sample of the fuel is pumped at a constant rate through a fine capillary tube. As the flow through the tube is laminar, pressure drop across the tube is proportional to viscosity. Parts in contact with the fuel are of stainless steel for corrosive resistance.
How do ships increase fuel efficiency?
Before your trip:
- Perform routine engine maintenance. Change fuel filters regularly – they remove unwatned particles, increasing engine efficiency.
- Check your propeller (prop).
- Maintain the bottom of your vessel.
- Install a fuel flow meter.
- Plan ahead.
- Decrease extra weight onboard.
What are the advantages of viscosity?
Advantages. Less pressure needs to be applied to the pen to have it write cleanly. This permits holding the pen with less stress on the hand, saving energy and improving comfort. This can also translate to quicker writing speeds.
Why is viscosity a very important parameter for any fuel oil?
The viscosity determines the ability to preheat to the correct temperature at the fuel pumps. At temperatures below the point of congelation a precipitation of wax will prevent the oil from being pumped. The upper limit according to ISO 8217 is 300C., but for most oil qualities the point of congelation will be lower.
How do ships refuel?
When it’s time for a cruise ship to refuel at a port, a small boat, called a barge, brings more fuel to the vessel. The process, called bunkering, takes the work of a team. Workers connect a hose from the supplier’s tank to the ship’s tank. The crew pumps fuel into the tank to the desired level.
How long has Viscotherm been in the market?
With constant innovative adaptations and further developments in the field of hydrostatic, electronic and sensoric systems, Viscotherm AG safeguards its position at the top of its technological field. For over 45 years, Viscotherm AG has been offering drive solutions in Swiss quality that are used around the world.
What kind of drive system does Viscotherm make?
VISCOTHERM develops and produces hydraulic ROTODIFF drive systems for a wide variety of applications. They are designed based on the required torque and required differential speed. Viscotherm AG develops and produces hydraulic ROTODIFF drive systems for a wide variety of applications.
How does a Viscotherm rotodiff pump unit work?
The pump unit uses an electric motor to drive a hydraulic pump. Oil flowing from this pump through a control block controls the oil flow to the ROTODIFF. Viscotherm AG designs and builds electronic display and control units. This enables continuous and automated control of VISCOTHERM drives and simplifies the entire process of separation.
How was the viscosity of a Viscotherm measured?
The first viscotherm used a measuring capillary and a small pump being fitted throughout the piping of the fluid flow system. The pump produced a constant pressure to force the measured liquid through the capillary. The viscosity was then determined by taking pressure readings a certain points off the capillary.