Chemical Engineering
Hossein Hosseini; Asef Zare
Abstract
Gas turbines are usually designed in such a way that the pressure of hot gases at the exit of the turbine and after the last moving blade is slightly lower than the atmospheric pressure. Therefore, in order to overcome the ambient pressure, a divergent duct is considered at the gas turbine outlet, and ...
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Gas turbines are usually designed in such a way that the pressure of hot gases at the exit of the turbine and after the last moving blade is slightly lower than the atmospheric pressure. Therefore, in order to overcome the ambient pressure, a divergent duct is considered at the gas turbine outlet, and in this way, the exhaust gases, which have a relatively high temperature, are sent to the surrounding atmosphere through the exhaust. The useful output power is transferred to the compressor and then to the generator. Today, the use of gas turbines in power plants and as a generator of electricity is very valuable. In addition, they are widely used in various industries such as space industries, marine platforms, petrochemical industries, etc. These turbines can be useful especially in parts of the electricity industry that require quick installation and commissioning, as well as in cases where the national electricity grid is lost. Speed in construction and installation, low investment cost and low maintenance cost, light weight and the possibility of using multiple fuels are among the advantages of gas turbines compared to other power plants. Current gas turbines are operated with fuels such as natural gas, diesel, low thermal value gases, methane, crude oil, oil. Regarding the disadvantages of these turbines, we can mention the low efficiency and the need for major repairs after fewer working hours and the changes in power and efficiency due to atmospheric changes.
Chemical Engineering
Frank Delborty
Abstract
Regarding this question, it should be strongly said that in most cases the answer is yes. Many of these power plants' problems can be solved, and the national ORNL laboratories play an important role in this regard. Choosing the right place for the right design, design and management can lead to further ...
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Regarding this question, it should be strongly said that in most cases the answer is yes. Many of these power plants' problems can be solved, and the national ORNL laboratories play an important role in this regard. Choosing the right place for the right design, design and management can lead to further solutions to these problems. As mentioned earlier, the use of fish ladders, aeration and flow control in large dams is one such solution. Environmental solutions have always existed, meaning that activities can be performed to eliminate or minimize the effects of these projects, or ultimately to compensate for them in some way. In hydropower projects, work can be done to resolve, alleviate, or mitigate the problem before it occurs. ORNL experts have been working for over a decade to effectively evaluate these problems and provide solutions to them. We are currently assisting the US Department of Energy to, with the help of industry, present a plan for the technological development of these power plants in an environmentally friendly manner. Large dams in the Pacific Northwest have stairways for fish that allow adult free fish to enter the river from the ocean to spawn young fish. The fish ladder is a classic example of this. Today, it is found that resident fish in one area also migrate seasonally to spawn to other areas and therefore need a crossing to cross.
