Background High Electric Demand Day (HEDD) Initiative PowerPoint Presentation, PPT - DocSlides

Background High Electric Demand Day (HEDD) Initiative PowerPoint Presentation, PPT - DocSlides

2018-03-14 33K 33 0 0

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OTC initiative identified link between HEDD and high ground level ozone concentrations. DEC committed to reduce NO. X. emissions by 50.8 . tpd. on high electric demand days. Established and new reduction efforts have been assessed and implemented. ID: 651033

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Presentations text content in Background High Electric Demand Day (HEDD) Initiative

Slide1

Background

High Electric Demand Day (HEDD) Initiative

OTC initiative identified link between HEDD and high ground level ozone concentrations

DEC committed to reduce NO

X

emissions by 50.8

tpd

on high electric demand days

Established and new reduction efforts have been assessed and implemented

Slide2

Established NOx RACT Regulations

Cement kilns (6 NYCRR Part 220)

Iron and steel process sources (6 NYCRR Part 216)

Coke oven batteries (6 NYCRR Part 214)

General process NO

X

sources (6 NYCRR Part 212)

Slide3

More Recent NOx reduction efforts

NOx RACT, 6 NYCRR Subpart 227-2

1

Stricter NOx emissions limits

Applies to 799 boilers & 55 combined cycle CT’s, no direct changes for simple cycle turbines (

peakers)Estimated reductions of ~79 tpd of NOX (from 2007 levels)Has impacted some peakers like Holtsville & Barrett, facilities which could not use system averaging

NYSDEC NOx RACT RIS

Slide4

Still Air Quality Issues, what else?

Peaking Units (combustion turbines)

Peaking units have been identified as a significant of NO

X

emissions in need of reductions.

In NYMA 154 peakers installed prior to 1987 and 23 after (149 prior to 1975)Pre-1987 peakers are significantly less efficient than their older counterparts.

 

NOx (tons)

Heat Input (

MMBtu

)

Gross Load (

MWh

)

Efficiency

Pre-1987 Peakers

1,345

5,880,519

425,018

24.8%

Post-1987 Peakers

44

4,651,613

526,185

38.6%

2011 - 2014 high ozone days

 

 

 

Slide5

Peaker

Emissions Analysis

Emissions were analyzed for 45 days between 2011-2015 with ozone levels above 75ppb.

Pre and post – 1987

peakers

were compared.Post-1987 peakers are >90% cleaner than older units and show the kind of control which is achievable.

 

Pre-1987 (lbs/MMBtu)

Post-1987 (lbs/MMBtu)

Pre-1987 (

lbs

/

MWh

)

Post-1987 (lbs/MWh)

2011 NOx Rate*

0.457

0.026

6.406

0.231

2012 NOx Rate*

0.458

0.020

6.590

0.174

2013 NOx Rate*

0.460

0.011

6.012

0.102

2014 NOx Rate*

0.421

0.010

6.195

0.089

*Rates for high ozone days

 

 

 

 

Slide6

Peaker

Modeling Analysis - Ozone

Peaking units were identified in EGU and peaking EGU modeling files.

On a high ozone day shows a 4.8ppb contribution, which is estimated by the difference daily 8-hour max ozone between base case and zero-out peaking

units case.

Slide7

Conclusions

Peakers

emit significant NO

X

emissions

Most peakers were installed prior to 1987All peakers installed prior to 1987 emit NOX at a significantly higher rate than those installed after 1987.

Slide8

Slide9


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