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Active Contributor

Join Date: Sep 2008
Location: New delhi
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Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/23/2016 12:35 AM

Dear All,

Request you to please share Technically feasible points to reduce Auxilary power reduction in 600 MW.

Boiler is a Single drum which adopts sub critical natural circulation, opposed burning of front and balanced draft, Steam turbine used is a sub critical, single reheat, condensing, tandem, three-cylinder steam turbine, Pulverized fuel, IDCT.

Regards,

Gaurav

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Guru

Join Date: Mar 2012
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#1

Re: ENERGY CONSUMPTION REDUCTION IN A 600 MW COAL FIRED POWER PLANT

02/23/2016 2:02 AM

Did you do a detailed process review then?

Do you think changing light bulbs in the power plant area is regarded as feasible option to reduce auxiliary power consumption?

How old are you motors? Whats the maintance status for the turbine or the pulverizer or anything?

Aren't you supposed to produce energy? Will any effort to reduce power consumption have an effect on the energy production?

All these questions!

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#2
In reply to #1

Re: ENERGY CONSUMPTION REDUCTION IN A 600 MW COAL FIRED POWER PLANT

02/23/2016 4:10 AM

Yes, We are doing Detailed Energy Audit by (Certified Externel & Internel Team), we already started LEDs Installation . Our Motors are 3-4 year old working fine at present. We are planning to do Turbine Capital overhaul after 50000 running hours. PM & PDM is strictly followed and Based on OEM recomendations, we are doing equipments overhaul.

Yes, We are in power generation business, supposed to utilize 100% capacity.

Yes, For doing Planned maintenance (Yearly once) we are shutting down the unit and do various efforts to reduce APC (for ex. APH Seals repalcement, BFP Catridge replacement, CT Fills Cleaning etc.)

Any Kind of idea for APC Reduction is welcome

Regards,

Gaurav

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Guru
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#5
In reply to #2

Re: ENERGY CONSUMPTION REDUCTION IN A 600 MW COAL FIRED POWER PLANT

02/23/2016 10:19 AM

It is rather inconsiderate to expect the forum to consult www.acronymfinder.com on all those TLAs. Next time, please define the TLAs before using them.

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#6
In reply to #2

Re: ENERGY CONSUMPTION REDUCTION IN A 600 MW COAL FIRED POWER PLANT

02/23/2016 8:06 PM

...Yes, We are doing Detailed Energy Audit by (Certified Externel & Internel Team)....Well then, why the question?

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#3

Re: ENERGY CONSUMPTION REDUCTION IN A 600 MW COAL FIRED POWER PLANT

02/23/2016 4:12 AM

What is required is an Energy Audit, which can only be carried out on site; the site cannot been from here!

Hire a local consultant who is skilled at these things, and carry out the recommendations in this individual's report once it has been received.

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#4

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/23/2016 8:53 AM

You should be talking to your equipment suppliers or an energy consulting firm, not a free anonymous forum.

Good luck with this one.

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#7

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/24/2016 3:07 AM

Dear Mr.GauravSharma,

You have put a general question.

Pl. answer

1. What is the present Aux.Power Consumption.? and what is guaranteed parameters.?

2. Is there any Heat Recovery from the Boiler Blow Down Water.?

3. Is the Plant operating as per HMBD parameters. What is the Plant Load Factor.? Obviously for the low Plant Load Factor, the Auxiliary Power will be more.

4. Do you circulate more Cooling Water than required for the condenser.? If so why.?

5. What is the Coal Quality and HGI recommended for the coal for pulverising the coal, and how much power is used.?

6. What is the Draught Conditions and draught Loss and Performance of the ID, FD, and Secondary Air Fans.? Do you use any VFD., which will help to reduce the Auxiliary Power Demand, while the Plant is working under reduced load condition.

DHAYANANDHAN.S

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#8
In reply to #7

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/24/2016 4:43 AM

DHAYANANDHAN.S Sir,

Following are the Answer for you questions

1. Present APC is 6 %. Design APC is 6.5 %

2. No,

Could you Please share you experience about Heat Recovery from the Boiler Blow Down Water.? May be we can recover Sootblowing steam also

3. Yes, plant is operating near to HMBD parameters, PLF is 95 to 100 %.

4. We are having two units of 600 MW capacity, As per Design we have to operate 4 pumps for two units.But due to High margin is CW Pumps design, We are operating 3 CW pumps instead of 4. 4 pumps operation causing High CW flow than design,Which results in Poor CT performance. Operating 3 pumps causing Less CW flow than design.

Do u suggest any Feasible solution for above problem ??

5. Coal quality is better or near to design, All High consuming pulverisers are already identified for corrections.

6. In draft System, Due to high margin in design , Our APC is more, We are planning to change Fan blades profile to shift our operating point to Maximum efficiency thr. We are exploring VFD option too but its high cost is the constraint.

Do u suggest any other Feasible solution for above problem ??

Regards,

Gaurav

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Power-User

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#10
In reply to #8

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/24/2016 9:59 AM

"Present APC is 6%. Design APC is 6.5%" Are you sure you needed reduction?

The way I see it is, you are off 0.5% than designed and that's is good, APC - Aux. Power Consumption.

I assumed there is no air preheating? It's because you haven't said so. Then, preheat air, down stream of fan/blower.

If it's base load wherein demands are not variable that much, installing VFDs would be a waste.

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#9

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/24/2016 6:59 AM

SO for your present ~.5% gain above design specs what is the expected return on investment time frame?

Also what further expected gains do you think you can get and how long will they take to pay for themselves?

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Guru

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#12
In reply to #9

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/24/2016 3:50 PM

"how long will they take to pay for themselves?"

My guess is the payoff could be realized about 10 years after plant decommissioning and demolition.

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Guru

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#11

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/24/2016 12:49 PM

Not my area of expertise, but if you reduce a reduction, is that not an increase? -- JHF

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#13

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/24/2016 9:25 PM

1. Fire your consultants since you don't believe they know what they're doing.

2. Reduce the power output of the generator, this will save fuel costs and reduce the APC required as well.

3. Resign, your salary can be added to the savings from #1.

If you don't like the easy steps listed above, then contact the EPC (Engineering, Procurement, Construction) contractor that designed the plant and ask them for help, they're the ones that were told by your management to minimize the capital expense without regard for the effect on the APC in the first place.

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#14
In reply to #13

Re: Energy Consumption Reduction In A 600 MW Coal Fired Power Plant

02/24/2016 9:33 PM

Can't argue.

Perhaps the OP should, figuratively, fall on his sword.

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Users who posted comments:

Circuit Breaker (1); dhayanandhan (1); gaurav sharma (2); IdeaSmith (2); lyn (3); Mr. small (1); PWSlack (2); RAMConsult (1); tcmtech (1)

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