Can gas turbine combined cycle power generation reduce environmental pollution?

There are four ways to improve the thermal efficiency of a gas turbine unit according to the formula

1 Intake air temperature 2 Compression ratio 3 Turbine front temperature 4 Turbo exhaust temperature.

To put it simply: 1 The intake air temperature is the temperature of the atmosphere just like a gas engine. In Antarctica< -100 degrees is more than 30 degrees < in Africa. > efficiency is much higher.

2 Compression ratio. The higher the efficiency, the higher the "ideal state".Because increasing the compression ratio consumes power. When the compression ratio reaches a numerical value. Instead, the power will go down. So the compression ratio cannot be infinitely high.

3. The temperature before the turbine is also the temperature of the combustion chamber, and the higher the temperature in the "ideal state", the higher the efficiency.

4 The lower the turbine exhaust temperature, the lower the "ideal state", the higher the efficiency. But in reality. The exhaust temperature should be greater than or equal to the atmospheric temperature.

It is impossible to be lower than the atmospheric temperature. Moreover, the exhaust temperature is calculated from the exhaust pressure. Even in space, it must be greater than zero.

and not equal to zero.

The total formula for efficiency tn = t3

where t3 is the pre-turbine temperature. T3 is determined by T1 "Inlet Air Temperature" + P2 "Air Pressure After Compression. > r "Fuel" calculated.

T4 is the turbine exhaust temperature, which is calculated by T1 "Intake Air Temperature" + P2 S "Turbine Front Pressure" + P4S "Exhaust Pressure" + R "Fuel". The formula is too complicated to write.

The above 4 cases. Under the current technology. Only the third is the best. It is also the easiest to achieve. If you want to increase the temperature, you must first find a high-temperature resistant material.

There are several main reasons for performing a cycle analysis of a gas turbine:

1. Performance evaluation.

Cycle analysis can be used to evaluate and optimize the performance of gas turbines. By analyzing the thermal cycling process of the turbine, it is possible to calculate the key performance indicators of the gas turbine, such as thermal efficiency, power output, and fuel consumption. This is critical to determining the health of a gas turbine, its performance, and its potential for improvement.

2. Fault diagnosis.

Cycle analysis can help diagnose and detect gas turbine failures. Through the measurement and analysis of cycle parameters, the operating status of the gas turbine can be monitored in real time, and fault points can be detected and located in time. For example, by analyzing changes in cyclic parameters such as compressor outlet temperature and line pressure of a gas turbine, it is possible to determine whether there is a fault phenomenon such as blade damage or leakage inside the compressor.

3. Operational optimization.

Cycle analysis can provide an optimized solution for the operation of gas turbines. Through a detailed analysis of the cycle of the parallel belt turbine, the optimal setpoint of the cycle parameters can be found to improve the efficiency and economy of the gas turbine. This analysis can also determine the optimal turbine operation strategy, such as controlling the operating mode of the gas turbine based on load demand and energy market conditions.

4. Equipment transformation and upgrading.

Cycle analysis provides a basis for equipment modification and upgrade of gas turbines. By analyzing the turbine cycle, the heat load distribution of each part can be determined, hot spots and heat sources can be identified, and technical support can be provided for the retrofit and upgrade of the turbine. For example, by analyzing the feasibility and benefits of waste heat**, the design of waste heat** units can be determined to improve the overall energy efficiency of gas turbines.

In summary, the purpose of gas turbine cycle analysis is to achieve the goals of gas turbine performance evaluation, fault diagnosis, operation optimization, and equipment modification, so as to improve the efficiency, economy, and reliability of gas turbines.

Answer: Dear! Have you been asked what losses are included in the simple cycle of a gas turbine?

The gas turbine simply follows the following types of losses:1Fuel loss:

The fuel consumption of a gas turbine is related to the size of the load and the environmental conditions, but in any case, there is a certain amount of fuel loss. 2.Heat loss:

Gas turbines generate a large amount of heat during operation, some of which is lost to the environment through the exhaust pipe and cooling system, causing heat loss. 3.Friction loss:

The various components inside the gas turbine create friction during operation, and friction leads to the loss of energy. 4.Leakage:

The gas inside the gas turbine can leak during operation, resulting in a loss of energy. 5.Mechanical Loss:

Mechanical damage can occur to the various components inside the gas turbine during operation, resulting in a loss of energy. 6.Aerodynamic loss:

The gas inside the gas turbine creates resistance and turbulence during the flow process, resulting in a loss of energy. These losses can affect the efficiency and performance of gas turbines, so they need to be minimized as much as possible when designing and operating gas turbines. Kiss!

I hope my answer helps! <>

Hello, I am glad to answer for you: The simple cycle of the gas turbine Liangxian machine includes the following kinds of losses:1

Combustion loss: When fuel is burned in a gas turbine, it is inevitable that a certain amount of fuel is not completely burned, resulting in waste of energy and pollutant emissions. 2.

Exhaust loss: During the exhaust process, high-temperature and high-pressure gases are discharged into the atmosphere, and these gases contain a lot of energy, but they are difficult to utilize. As a result, exhausting brings a serious waste of energy.

3.Relative sliding loss: Due to the relative motion of the fluid medium (gas) in the gas turbine, a certain amount of kinetic energy is converted into heat energy and vortex loss is caused.

4.Conduction loss: Within the various components of the gas turbine, due to the characteristics of the material, there is a certain amount of heat transfer loss.

These losses are mainly due to heat transfer between the internal components of the mechanical equipment or heat dissipation by auxiliary equipment. 5.Mechanical friction loss:

The mechanical parts inside the gas turbine will produce mechanical dissipation and friction loss when moving at high speed, which will reduce the mechanical energy conversion efficiency. 6.Air preheater loss:

In order to improve thermal efficiency, air preheaters are often used in gas turbines to preheat the inlet air. However, the air preheater itself also brings a certain amount of energy loss. In summary, these losses in the simple cycle of the gas turbine will have an impact on the thermal efficiency and energy efficiency of the gas turbine.

Fuel consumption loss: Gas turbines need fuel to operate, and fuel consumption is related to power output. The energy of the fuel is not fully converted into mechanical energy, and some of it is emitted in the form of exhaust gases and heat.

2.Exhaust gas loss: The exhaust gas produced by gas turbines contains a large amount of thermal energy, which can cause energy loss if not used efficiently.

Hello dear, exhaust gas can also pollute the surrounding environment. 3.Friction loss:

There is friction between the components inside the gas turbine, and the mountain god Sakura consumes a certain amount of energy. 4.Cooling loss:

Gas turbines require the use of coolant to maintain the temperature of the components, which also consumes a certain amount of energy. 5.Air Leak Loss:

There are some interfaces and seals inside the gas turbine that can lead to energy loss if there is a gas leak. If you have any questions, you can continue to communicate with me

First of all, we should clarify the concept that as long as human beings engage in production and living activities, they will cause pollution to the environment, and this pollution is absolute, and what we are discussing is how to minimize the amount and impact of this pollution.

Gas turbine combined cycle (CCGT), which we commonly refer to as gas turbine power generation. He is characterized by the fact that the fuel he uses is natural gas, so there are very few (not none) sulfur dioxide, nitrogen oxides and dust in the emissions after combustion. In some places, the first place is considering the Malaysia gas turbine project for policy reasons and political performance, but in terms of the current situation and conditions, gas turbine power generation will not become the mainstream power generation mode, let alone replace coal-fired power generation units.

The reasons are as follows: First, economy, I forgot the specific data, but for each kilowatt-hour of electricity, the cost of natural gas used in gas turbines is several times that of coal-fired units (I hope to know the friends who know to correct). Although there are ** policy subsidies (which may not be implemented), it is basically a loss of money and making money. Electricity is the foundation of modern production and life, and it affects the whole body, so economic efficiency is still the first thing to consider.

Second, there is no absolute advantage in environmental protection. Recently, China's Ministry of Environmental Protection (MEP) introduced a new policy that allows large coal-fired units in the eastern coastal areas to report emissions reductions in accordance with gas turbine emission standards. (Here is an explanation, if a place wants to build a new unit, then the place must reduce the total amount of pollutants that the new unit will emit, that is, the total amount is not allowed to increase, you want to start the project to shut down others, or occupy your total index) gas turbine emission standards we generally call "near zero emissions", this foreign country has always had, Japan is very good, there is no technical difficulty, but the initial construction cost increases.

Coal-fired units with a single capacity of 1 million can fully meet the same gas turbine emission standards (or close to them) by adding environmental protection equipment, and the production cost is much lower.

Third, the gas source is unstable. There are only two ways to transport natural gas, pipelines and LNG ships, and neither of these two ways can be transported how you want. The pipeline has so much transportation volume per unit time, and LNG needs a dedicated wharf.

The amount of gas used for gas turbine power generation is huge, and natural gas is not only used to generate electricity, but also the needs of our daily life.

To sum up, at present, gas turbine power generation is not as good as imagined. The environmental protection treatment technology of coal-fired power generation in the world has been very mature, and the desulfurization and drying of coal-fired coal before entering the furnace, and the dust removal equipment of dry and wet mixing, desulfurization and destocking, our country is also gradually transforming. Therefore, as long as the design is reasonable, the equipment is up to standard, and the management is in place, the pollution can be reduced to an acceptable range.

Gas turbine cycles are divided into simple cycles, complex cycles, closed cycles, and semi-closed cycles.

The circulation of the working fluid through the compressor, combustion chamber and turbine in turn is called a simple open cycle. An ideal simple cycle, i.e., a Brighton cycle, which does not take into account chemical reactions, flow losses, and heat dissipation losses, is the cycling process.

Complex forms of circulation with processes such as recuperation, intercooling, and intermediate reheating are called complex cycles. The use of complex cycles can improve the specific work and thermal efficiency of the cycle. However, the equipment is complex and the management is inconvenient, so it is rarely used on ships, and civilian ships are in the first place.

The recuperation cycle, in which part of the waste heat from the turbine exhaust is used to preheat the air entering the combustion chamber by using a recuperation device, which reduces fuel consumption.

In the open circulation gas turbine, there is no recirculation of the working fluid within the power structure, the air is sucked in from the atmosphere, compressed, combusted, and then discharged into the atmosphere after work, and its advantage is that the control and sealing (sealing) system is simple, a high power-to-weight ratio can be obtained, and there is no need for cooling water in the work, and most gas turbine power is in this form; Basically all the working fluids of closed-cycle gas turbines (except for sealing leakage, outgassing losses and the working fluids extracted for control and regulation) are continuously recirculated, and the heat from fossil fuels (such as nuclear reactions) is transferred through the heat exchanger wall to the circulating rock ring, and the working fluid can be inert gas, carbon dioxide or ammonia, with the prominent advantage that a nuclear heat source can be used. Other advantages are: 1. Clean working fluid; 2. The pressure and compression of the working fluid are easy to control; 3. High absolute pressure and density of working fluid; 4. Bi Fanzhi's efficiency remains unchanged in a wide range of use.

The semi-closed hand-sensitive circulation gas turbine is a partial working fluid entering the recirculation, which requires a pre-cooler to cool the gas entering the recirculation, which is a combination of open and closed cycles.