What is a CCGT power station?

The Power Station has two gas turbines and one steam turbine. The hot exhaust gases from the gas turbines contain a lot of energy and these gases are passed through the heat recovery steam generator to produce steam. The high pressure steam is used to drive a steam turbine which generates further electricity.

Subsequently, one may also ask, what does combined cycle power plant mean?

In electric power generation a combined cycle is an assembly of heat engines that work in tandem from the same source of heat, converting it into mechanical energy, which in turn usually drives electrical generators.

What is the difference between cogeneration and combined cycle?

A simple-cycle or combined-cycle plant may incorporate cogeneration – or combined heat and power – capabilities. In this process, a heat recovery steam generator (HRSG) uses heat from natural gas turbine exhaust to produce steam (see description of the combined-cycle process).

How does gas to power work?

Gas turbines and boiler power plants are the two most common methods. In a gas turbine, gas is ignited under pressure and combustible high-pressure, high-temperature gases are produced. In a boiler power plant, electricity is generated by heating water to produce steam which, via a turbine, powers a generator.

What is a closed cycle gas turbine?

A closed-cycle gas turbine is a turbine that uses a gas (e.g. air, nitrogen, helium, argon, etc.) for the working fluid as part of a closed thermodynamic system. Heat is supplied from an external source. Such recirculating turbines follow the Brayton cycle.

What is a Joule cycle?

The Brayton cycle is a thermodynamic cycle named after George Brayton who describes the workings of a constant-pressure heat engine. It is also sometimes known as the Joule cycle. Reversed Joule cycle used as external heat and incorporates the use of a regenerator.

What is the Brayton cycle?

The Brayton cycle is a thermodynamic cycle named after George Bailey Brayton that describes the workings of a constant pressure heat engine. The original Brayton engines used a piston compressor and piston expander, but more modern gas turbine engines and airbreathing jet engines also follow the Brayton cycle.

What is the pressure ratio?

In aeronautical engineering, overall pressure ratio, or overall compression ratio, is the ratio of the stagnation pressure as measured at the front and rear of the compressor of a gas turbine engine. Overall compression ratio also means the overall cycle pressure ratio which includes intake ram.

What power cycle is used in jet engines?

In common parlance, the term jet engine loosely refers to an internal combustion airbreathing jet engine. These typically feature a rotating air compressor powered by a turbine, with the leftover power providing thrust via a propelling nozzle — this process is known as the Brayton thermodynamic cycle.

What is the engine pressure ratio?

The engine pressure ratio (EPR) is the total pressure ratio across a jet engine, measured as the ratio of the total pressure at the exit of the propelling nozzle divided by the total pressure at the entry to the compressor. Jet engines use either EPR or compressor/fan RPM as an indicator of thrust.

What is n1 speed?

The first spool is the low pressure compressor (LP), and its rotating speed is termed as N1 and the second spool is the high pressure compressor (HP), its rotating speed is termed as N2. BUT General Electric prefers to use N1 as the power of the engine- the thrust produced by the engine.

What is the EGT?

An exhaust gas temperature gauge (EGT gauge) is a meter used to monitor the exhaust gas temperature of an internal combustion engine in conjunction with a thermocouple-type pyrometer. EGT gauges are found in certain cars and aeroplanes.

Why is it important to monitor EGT?

Why EGT is Important. The exhaust gas temperature (EGT) pyrometer can be one of the most important gauges on a turbo-diesel-powered vehicle. It can warn the driver of situations that are potentially damaging to the engine, and it can also be used as a guide for optimizing fuel economy.

What is peak EGT?

The “Best Economy” range begins at peak EGT, and continues on the lean side until the engine won’t run smoothly anymore (usually the limit is about 100-150 degrees Lean of Peak). Operating the engine at Best Economy mixture provides the most power for the least amount of fuel, and thus the longest endurance.

What is CHT aircraft?

Exhaust Gas Temperature (EGT) Gauge – Indicates the temperature of the exhaust gas just after combustion. Used to set the fuel/air mixture (leaning) correctly. Cylinder Head Temperature (CHT) Gauge – Indicates the temperature of at least one of the cylinder heads. Used to set the fuel/air mixture.

What is CHT?

A Certified Hand Therapist (CHT) is an occupational therapist or physical therapist who has a minimum of three years of clinical experience, including 4,000 hours or more in direct practice in hand therapy.

What causes high exhaust gas temperature?

Diagnosing Causes of High EGT in Marine Engines. There are several common reasons for high exhaust temperatures in marine diesel engines, but MOST causes can be attributed to a scavenge fire and/or a defective fuel valve, both of which are caused by a fuel system fault.

What does a pyrometer tell you?

A pyrometer is an exhaust temperature gauge that allows you to read an immediate change in exhaust temperature by receiving a temperature signal from a probe (thermocouple) that is inserted into the exhaust manifold.

Is diesel exhaust hotter than gas?

This ensures the exhaust gasses are minimally diluted and therefore hotter. Diesel engines have no air throttle and tend to run leaner, diluting the exhaust gasses with uncombusted air, reducing the exhaust temperature. Most Diesel engine powered vehicles get 20-40% better gas mileage than gasoline engine vehicles.

What does the pyrometer measure?

A pyrometer is a type of remote-sensing thermometer used to measure the temperature of a surface. Various forms of pyrometers have historically existed.

How does an optical pyrometer work?

Some devices described as pyrometers actually have to be touching the hot object they’re measuring. Strictly speaking, instruments like this are really just high-temperature thermometers based on thermocouples. Since they don’t measure temperature at a distance, they’re not really pyrometers at all.

What is the difference between cogeneration and combined cycle?

A simple-cycle or combined-cycle plant may incorporate cogeneration – or combined heat and power – capabilities. In this process, a heat recovery steam generator (HRSG) uses heat from natural gas turbine exhaust to produce steam (see description of the combined-cycle process).

How does a combined cycle power plant work?

How a Combined-Cycle Power Plant Produces Electricity

  • Gas turbine burns fuel. The gas turbine compresses air and mixes it with fuel that is heated to a very high temperature.
  • Heat recovery system captures exhaust.
  • Steam turbine delivers additional electricity.
  • What does combined cycle power plant mean?

    In electric power generation a combined cycle is an assembly of heat engines that work in tandem from the same source of heat, converting it into mechanical energy, which in turn usually drives electrical generators.

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