In the very earlier days carbon-dioxide and ammonia were used as refrigerants. With the increasing applications of refrigeration and air conditioning, a number of new refrigerants were found. Of these the most popular are the halogenated hydrocarbons.
Halogenated hydrocarbons have been extensively used as refrigerants. The refrigerants that contain chlorine as one of the atoms in their compounds cause ozone depletion and greenhouse effect. Chlorofluorocarbons or CFCs have a major effect on the ozone layer.
The job of Maintenance Engineer can be one of the toughest and most stressful. But if there is no breakdown of the machines there will be no pressure from all the managers and you can relax.
What do you do when you want to stick stamps on a letter you are posting, or when the fascias of your mobile breaks? I for one do not use my saliva or buy new fascias in such situations. Rather I use some sort of glue for the job. Learn how engineers use the process of welding metals to do the same.
We learned about the basics of an electric arc in the previous article. In this part we would go a bit deeper and learn about the electric circuit which forms the arc. Apart from that we would also take a look at the welding electrodes, their functions and usefulness in the arc welding process.
Welding, as we learned in a previous article, deals with joining together materials with the combination of heat and/or pressure. There are several techniques to achieve this and one of the most commonly used is the electric arc method. In this article you will see the basic principles of the same.
The job of a Power Plant Engineer is to ensure that the power is produced continuously as per the specifications of the plant. They take care of operations as well as maintenance of power plants. Power Plant Engineers can find jobs in thermal, hydraulic, and nuclear power plants.
The human body is like a machine that consumes fuel and produces power and heat. When the body consumes food, which contains lots of calories, it gets converted partially into energy and partially into heat. To attain body comfort, the excess heat generated inside the body should be removed.
AutoCAD is one of the most popular CAD software programs. Autodesk has launched the latest version named AutoCAD 2009. It has great looks and a number of additional features, which have been discussed in this article.
The refrigerant undergoes various changes throughout the vapor compression cycle and it is in the evaporator where it actually produces the cooling effect. The evaporator is usually a closed insulated space where the refrigerant absorbs heat from the substance or food to be cooled.
