Diesel and Oil Engines

Some slow-speed, single-cylinder engines burn diesel or fuel oil by high-pressure injections into the cylinder. The compression is much greater than gas engines. Technical Data used in the field explained in petroleum courses in Rawalpindi.  Heat, developed by compressing the air in the cylinder, ignites the fuel sprayed into the cylinder. These engines are divided into two types: full diesels, which are cold-starting, and semidiesels, which require heating to start.

The cold-starting diesel has a compression ratio of 14:1, resulting in a pressure of approximately 500 psi. The semidiesel has approximately 250 psi compression, which requires a hot tube heated by a torch or electric glow plug to produce enough heat to ignite the charge. Once these engines are started, enough heat is produced in the cylinder to cause ignition of the fuel as it is injected into the cylinder. Some more details of petroleum courses in rawalpindi are as under.

High-speed, multicylinder diesel engines have been improved until they are now adaptable for oilwell pumping. These are not used commonly where gas is readily available. Diesel engines fill a need where other fuels are not readily available.

Five factors should be considered when determining which engine to purchase: fuel availability, equipment life and cost, engine safety controls, horsepower, and installation.

 Natural gas is the logical choice. Taken from the wellhead casing annulus, it is called “wet gas” and is used most frequently. Where there is insufficient gas available at the wellhead, gas maybe piped to the engine from the field separator. In either case, the gas must be scrubbed to remove oil and water. This is done in a double compartment volume tank where gas pressure also is reduced by a regulator. Gas from the separator will have most of the moisture and oil removed and is considered a better fuel.

Sour gas is a natural gas that contains excessive sulfur or CO2 and is not considered a good fuel. Two percent sulfur is considered excessive. Where sour gas must be used, suitable treaters are required to improve the quality of the fuel. Sour gas causes severe etching and wear of engine parts as well as quick contamination of the lubricating oil in the four-cycle engines. Two-cycle engines fare slightly better because of their construction. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join petroleum courses in Islamabad.