Simple cycle power generation
A circulatory system consisting of a gas turbine and a generator independently, also known as an open cycle. Its advantages are fast installation, flexible start-stop, and more for power grid peaking and traffic, industrial power systems. The current most efficient open cycle system is the GE LM6000PC light gas turbine with an efficiency of 43%.
Pre-circulation cogeneration or power generation
The circulation system consisting of a gas turbine and a generator and a waste heat boiler converts the high-temperature spent flue gas discharged from the gas turbine through a waste heat boiler and converts it into steam or hot water for use. It is mainly used for cogeneration, and it also has the steam from the waste heat boiler injected into the gas turbine to improve the output and efficiency of the gas turbine. The most efficient pre-return cycle system is GE's LM5000-STIG120 light gas turbine with an efficiency of 43.3%. The total efficiency of pre-circulation cogeneration is generally over 80%. In order to improve the flexibility of heating, most of the pre-circulation cogeneration units use the waste heat boiler afterburning technology, and the total efficiency at the time of supplemental combustion exceeds 90%.
Combined cycle power generation or cogeneration
The gas turbine and the generator are combined with a waste heat boiler, a steam turbine or a heating steam turbine (extraction type or back pressure type), which converts the high-temperature spent flue gas discharged from the gas turbine into a steam through a waste heat boiler. Steam is then injected into the steam turbine to generate electricity, or the spent steam after partial power generation is used for heating. The form includes a single-shaft combined cycle in which a gas turbine and a steam turbine coaxially propel a generator, and a gas turbine and a steam turbine each propel a multi-axis combined cycle of the respective generators. Mainly used for power generation and cogeneration, the most efficient combined cycle system for power generation is ABB's GT26-1 with an efficiency of 58.5%.
Integrated loop
A circulation system consisting of a gas generator, a gas turbine, a waste heat boiler, and a steam turbine, also called an IGCC. It mainly solves the problem of using low-cost solid fossil fuels instead of gas turbines to use gas and liquid fuels, improving coal utilization efficiency and reducing pollutant emissions. It can be used as a comprehensive supply system for city gas, electricity, central heating and centralized refrigeration, as well as building materials and chemical raw materials. At present, GE's overall circulation system using MS7001F technology can achieve a power generation efficiency of 42%.
Nuclear combustion combined cycle
A power generation cycle system consisting of a gas turbine, a waste heat boiler, a nuclear reactor, and a steam turbine. The flue gas discharged from the gas turbine reheats the steam output by the nuclear reactor, mainly to increase the temperature and pressure of the nuclear reactor steam, improve the efficiency of the steam turbine, and reduce the engineering cost of the steam turbine part. Currently in the trial phase.
Gas turbine auxiliary cycle
In a post-cycle power generation steam turbine group that uses coal, oil, etc. as fuel, a small gas turbine is used as a power plant auxiliary circulation system to preheat the boiler, blast, improve combustion, improve efficiency, and directly use the power to drive the feed water pump. In 1947, the first industrial gas turbine in the United States used this method to participate in the operation of the power generation cycle system.
Gas flue gas combined cycle
A circulation system consisting of a gas turbine and a flue gas turbine further utilizes the residual pressure and heat in the flue gas emitted by the gas turbine to further promote the power generation of the flue gas turbine. Compared with the gas-fired combined cycle system, the system can be completely used without water, but the cost of the gas turbine is relatively high and has not been widely used.
Gas heat pump combined cycle
An energy utilization system consisting of a gas turbine and a flue gas heat pump, a gas turbine, a flue gas turbine and a flue gas heat pump, or a gas turbine, a waste heat boiler, a steam heat pump, and a gas turbine, a waste heat boiler, a steam turbine, and a steam (smoke) heat pump. After the energy utilization cycle is completed in the gas turbine, the flue gas turbine, the waste heat boiler, the steam turbine and the like, the system further utilizes the heat pump to deeply recycle the waste heat of the flue gas, steam, hot water and cooling water, or directly pushes the power to the heat pump. This process can be used as cogeneration, cogeneration, heat and cold cogeneration, electric cooling cogeneration, direct heating or direct refrigeration. The system is extremely efficient. If used for direct heating, the thermal efficiency can reach 150. % is one of the main trends in future energy use.
Fuel cell - gas turbine combined cycle
The US Department of Energy recently announced the development of the world's first power generation unit that combines fuel cells and gas turbines to generate electricity more efficiently and significantly reduce environmental pollution. It is understood that the fuel cell of this device consists of 1152 ceramic tubes, each of which is like a battery. The battery uses natural gas as fuel to emit high-temperature and high-pressure exhaust gas, and the gas turbine uses the hot exhaust gas generated by the fuel cell to produce a second round of electric power. Since there is no combustion process in the fuel cell, only the chemical decomposition of the natural gas fuel to generate electricity can greatly reduce the pollution. The equipment does not produce sulfur dioxide, and the nitrogen oxide content of its reaction products is less than 2% of current natural gas power generation equipment, and carbon dioxide emissions are reduced by 15%. Moreover, as long as natural gas and air are present, the fuel cell can work. The new generation of power generation equipment has a power generation capacity of 220 kilowatts and can provide electricity to 200 households. Its power generation efficiency reaches 55%, which means that 55% of the energy from natural gas fuel is converted into electric energy, which is much higher than the 35% power generation efficiency of coal-fired power generation equipment and 50% higher than that of gas turbines.
Perfume & Cosmetic & Skin Care
Tin Box,Tin Can,Metal Can
Luan Jinyu Metal Printing & Can Co., Ltd. , http://www.chmoreusage.com