99/03385 Impacts from a fossil fuel power plant on ozone levels in Memphis, Tennessee
- Publisher
- Elsevier Science
- Year
- 1999
- Weight
- 216 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0140-6701
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✦ Synopsis
solar energy, natural gas and water will be constructed.
A feasibility study has shown that this CSIRO hybrid energy concept to be technically feasible and capable of being completed within three years.
99103365
Impacts from a fossil fuel power plant on ozone levels in Memphis, Tennessee Mueller, S. F. and Bailey, E. M. Proc., Annu. Meet. Air Waste Manage. Assoc., [computer optical disk] 1998, 91, RP76C03/1-8. Located on the Mississippi River in the south-west corner of Memphis, Tennessee, the Tennessee Valley Authority (TVA) Allen power plant has three coal-fired cyclone boilers with a rated capacity of 272 MW each. It is a Phase II plant under Title IV of the Clean Air Act and is the largest single source of NO, in the Memphis area. TVA plans to reduce Allen NO, emissions through a combination of burning low-sulfur coal and installing gas re-burn technology. A modelling study using the UAM-V photochemical model examined the potential impact of the NO, reductions on 0s concentrations in the Memphis area. A series of four model simulations were made in which different Allen emissions scenarios were examined. The focus period of the photochemical modelling was 11-14 July 1995 when measurements in and near Memphis indicated peak hourly 0s concentrations of 135-140 ppb. This analysis primarily examined computed impacts within 50 km of Memphis. Allen was calculated to contribute as much as 20-30 ppb to ground 0s concentrations 20-50 km downwind using NO, emission rate before Title IV compliance.
After compliance, it was computed to contribute only -10-20 ppb. At the same time, maximum daily 0s reductions due to Allen NO, titration of 0s were 30-60 ppb. These benefits will be reduced by 30-50% after Title IV compliance and are expected to occur within 30 km of the plant. More model grid cells indicated disadvantages, rather than benefits on three of four episode days using the Title IV compliance emission rate. Significant 0s disadvantages were expected due to the well-documented NO titration of 0s within plumes having a high NO:volatile organic compound ratio. In examining impacts of the l-h 120 ppb 0s standard versus an 8-h 80 ppb standard, modelling showed that Allen emission reductions were more likely to impact a l-h standard than the proposed 8-h standard.