1. Review of Diesel 2. Review of Hydrogen Essay

1. Review of Diesel 2. Review of Hydrogen - Essay Example The invention of Diesel was financed by M. A. N. of Augsburg (Mathur and Sharma 2000). Diesel has a boiling range of about 180Â °C to 300Â °C. It is widely used because it is cheap and has better thermal efficiency. Today Diesel is produced in three ways: Petroleum Diesel, Synthetic Diesel and BioDiesel. 1. Petroleum Diesel: Petroleum diesel is also called as Fossil Diesel. This diesel is produced from fractional distillation of crude oil. The supply of petroleum diesel is fast depleting and hence the search for other types is becoming all the more important. 2. Synthetic Diesel: Synthetic diesel is made by processing natural gas through a technology which converts the natural gas into Synthetic Diesel. Synthetic diesel is free from sulphur and provides numerous other environmental benefits over petroleum diesel. Synthetic diesel is cleaner, cleaner-burning and can be formulated for superior cold weather performance. The following diagram shows the emission reductions compared to typical California diesel: 3. Biodiesel: Biodiesel is a renewable diesel fuel substitute. It can be made from a variety of natural oils and fats. Biodiesel is made by chemically combining any natural oil or fat with an alcohol such as methanol or ethanol. Methanol has been the most commonly used alcohol in the commercial production of biodiesel (National Renewable Energy Laboratory, May 1998). The diesel cycle is the theoretical cycle for slow speed compression-ignition or diesel engines. In a diesel cycle the heat is added at constant pressure. The pressure drop at the end of expansion is still at constant volume. This cycle is shown in the following T-s diagram. The process 1-2 is reversible adiabatic (isentropic) compression of air. Heat is then added at constant pressure, represented by 2-3. In actual engine heat addition takes place in the form of injection of fuel which self-ignites due to high temperature caused by high compression

Party Press Essay Example | Topics and Well Written Essays - 1500 words

Party Press - Essay Example Mass media refers to the transfer of knowledge and information to an unlimited mass audience. Phones or cell phones may not usually be considered as a mass medium; this is because telephones are the device meant for only two way communication between two or more than two people. Previously there have been only six categories of mass media; that is, Print, Recordings, Cinemas, Radio, Television and the Internet. Now a new category has been introduced in the mass media, which are cell phones. Cell phones are now being considered as the seventh mass media channel; also called as digital media. Cell phones are the only mass media that are always carried by the user. They also provide nearly 100% accuracy regarding the audience and that every content that has ever passed through the device could be traced back; whether it is calls, messages, or any other media content such as movies, videos, or music. In ancient times the Church was the sole source of information for the people. The Churc h had the complete power over the minds of the citizens and was very powerful. They were the ones responsible to disintegrate the information in whatever form and style that suits them. After the Gutenberg’s invention of metal movable type, books became widely available. They were then the source of knowledge and information. ... The 1960s saw the first innovation in the form of open reel audio tapes; then came the C-cassettes and music cartridges in the 1970s and later in 1990s the MP3 files were the new digital storage medium for music. The records were not only limited to music storage but also provided storage for videos and movies. In the 1970s, movies started appearing in video cassettes. Later recording also expanded to include categories such as computer programs, video games and TV shows. Due to these advancements the music industry also evolved to include the pop music, besides the orchestra. Cinemas were introduced in the 1910s as the third mass media channel. Watching a movie in cinemas is an exhilarating experience for many. Movies were the first mass media that involved moving images and pictures. The visual effect they created was unmatched by any other mass media. At first movies were thought as means that could diminish the value of books. But this was not the case. Some of the best sellers w ere converted into movies, while in other cases the best of the Hollywood movies were written in print. Not only books and novels, but comics were also made into super-hit films, such as Superman, Batman, and Spiderman etc. The radio became the next mass media. With the invention of radio, came a concept of broadcast schedule and audience were required to listen to the shows when they were aired, and not just as they wished; as was the case in all the previous mass medias. It became the channel for commercial communication and brought its audience a wide range consisting of news, information, dramas, music, debate etc. Radio first brought the concept of breaking news; disseminating news and information as it is happening. Radios were sustained by