13 replies to this topic

[engware]

To All:

The use of fuel gases produced from coal as gas turbine fuel offers an attractive means for efficiently generating electric power from the Nation’s most abundant fossil fuel resource.

Combustion turbines will be used in future coal-based combined cycle plants. Currently, new turbine technology is being developed that can boost the performance and fuel flexibility of future coal-based power systems.

I would like to invite both Forum members and visitors to start a discussion on Future Gas Turbines -- ask questions of interest, share knowledge and experience related to Future Gas Turbines (enhanced technical performance and fuel flexibility).

Also, everybody is welcome to contribute to the Future Gas Turbines topic.

Thanks,

Gordan

Below are a few plots dealing with the Brayton Cycle (Gas Turbine).

[pawan]

I always wondered about multistage high pressure, high volume air compressors inside the gas turbines, which If considered as a normal compressor outside the turbine with interstage cooling can reduce significant power consumption.

Is it absolutely necessary to use it without interstage cooling, I accept the benefit of temperature at the finals stage discharge but, is there any comparison made for the gains or losses for interstage cooling.

[engware]

Hi there:

Yes, such compression would reduce the compressor power requirements and improve the power cycle thermal efficiency.

The attached HTML caclulators can help with required numeric calcluations.

However, an MS Excel type calculation would be needed to estimate the power cycle state points and cycle thermal efficiency.

Thanks,

Gordan

[pawan]

So the question is - why it is not yet adapted?

[engware]

Hi there:

If you are refering to the compression interstage cooling, I would assume that due to economics and maintenance and operation issues has not been fully adapted -- reliability and availability should be effected requiring another stand by unit to be made available.

Actually, in a long run your compression interstage cooling has to be more cost effective, but ties up a lot more capital up front.

Sometimes it is tricky to figure out, without doing detaii level studies, why good ideas from the thermal efficiency point of view do not get implemented ...

Actually, this is a good topic for more experienced engineers, who have been around for a while and working in the field, to give their opinion on the subject matter ...

Thanks,

Gordan

[Lugano Wilson]

hi,

what are the main environmental advantages of using fuel gas (from coal gasification) compared to direct combustion of coal? i understand that coal combustion poses a serious pollution problem.

Lugano

To All:

The use of fuel gases produced from coal as gas turbine fuel offers an attractive means for efficiently generating electric power from the Nation’s most abundant fossil fuel resource.

Combustion turbines will be used in future coal-based combined cycle plants. Currently, new turbine technology is being developed that can boost the performance and fuel flexibility of future coal-based power systems.

I would like to invite both Forum members and visitors to start a discussion on Future Gas Turines -- ask questions of interest, share knowledge and experience related to Future Gas Turbines (enhanced performance and fuel flexibility).

For the purpose of technical discussions, two HTML calculators dealing with simple gas tubine power cycle and power cycle components/processes are attached.

Also, everybody is welcome to contribute to the Future Gas Turbines topic.

Thanks,

Gordan

[djack77494]

The UNCONTROLLED combustion of coal poses a serious environmental problem. Modern technologies have done (in my opinion) an excellent job in addressing all of the combustion related environmental difficulties except that of "greenhouse gas" emissions. If you'd like my opinions on that, please refer to my and some other posts in May 2003 in the "Kyoto Protocol" Forum. Unfortunately, much of the discussion in this forum is found in the first posting which is titled "Notice About New Message Board".

[Lugano Wilson]

thanks,

Lugano

The UNCONTROLLED combustion of coal poses a serious environmental problem. Modern technologies have done (in my opinion) an excellent job in addressing all of the combustion related environmental difficulties except that of "greenhouse gas" emissions. If you'd like my opinions on that, please refer to my and some other posts in May 2003 in the "Kyoto Protocol" Forum. Unfortunately, much of the discussion in this forum is found in the first posting which is titled "Notice About New Message Board".

[Lugano Wilson]

coal is one of the most abundant resource we are currently having. however, the fact that it is prone to pollution, clean technologies need be put in place for which turbines in combined cycles must be among. coal gasification might also be taking its importance - with the light of gas cleaning technologies.

Lugano

[engware]

Hi there:

One can check out DOE web sites such as:

http://www.energy.gov
and
http://www.fossil.energy.gov

Thanks,

Gordan

[Johnson]

This is so cool .... the whole thing excites me. Along the same lines I found this info online the other day from another source. I found it interesting, so here it is ..........

I am director of a small partnership who have spent the past 15 years inventing and perfecting a revolutionary new wind turbine design. We are looking for a Business Angel investor to help us get this project off the ground.

Our turbine aims to be the cheapest dollar per kilowatt turbine in the world and is ideally suited for domestic and urban installation unlike current turbine designs. It runs silent, is incredibly cheap to manufacture and looks fantastic too. We intend marketing two versions, a 300W one intended for powering household lights/refrigerators/ TV/DVDs etc and a larger 1.5KW turbine to be installed in arrays to power farms and rural areas not able to connect to the electricity grid.

The turbine will be bought in a small-suitcase size carry pack and can be attached to a house roof or wall much like a satellite dish. It does not need to be elevated as current horizontal (or propeller type) turbines do. Each 300W turbine will cost around $350 to manufacture including toroidal design PMG and "black box" containing charge/load/shunt controllers, a 600W inverter and deep cycle battery. Cost Price of entire package will be around $700 making it the cheapest dollar per kilowatt turbine in the world.

Our unique turbine control mechanism is patentable but we currently lack the funds to proceed with this. We estimate we need around $250 000 to begin manufacturing and marketing this fantastic turbine which is going to turn the renewable energy market on its head! We have 4000sqm factory space at our disposal and a small manufacturing staff of around 5. For a cash investment and hopefully business and marketing advice and assistance, we are offering up to 30% equity in our company. Please contact me if there are any Business Angels interested in this potentially highly profitable venture.

Our comprehensive business plan which conservatively estimates profits of around $1 750 000 per annum can be supplied on request.

Kind regards

Laurence Lemmon-Warde

director
winggen wind turbines
+27 82 566 8297

The options that are becoming available are very exciting ...... the future looks bright. Sam

Actually, in a long run your compression interstage cooling has to be more cost effective, but ties up a lot more capital up front.
One can check out DOE web sites such as:

http://www.energy.gov

Actually, in a long run your compression interstage cooling has to be more cost effective, but ties up a lot more capital up front.
One can check out DOE web sites such as:

<a href="http://www.energy.gov" target="_blank">http://www.energy.gov</a>

I agree with your concept of compression interstage cooling would be effective.. the link says so.. thank you providing useful info..

Paul.

adhesive tape || adhesive tape manufacturer

[mga19888]

really i like to know how to make energy balance for combustion chamber and turbine. if i use simple gas turbine cycle.