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--></style><title>Oct. 8 LFEE Seminar - Avoiding Fossil Power Plant
Emis</title></head><body>
<div>Environment and Sustainability Brownbag Seminar Series<br>
Sponsored by the MIT Laboratory for Energy and the Environment
(LFEE)</div>
<div>http://lfee.mit.edu</div>
<div><font color="#000000"><br></font></div>
<div><font color="#000000">Avoiding Fossil Power Plant Emissions with
Renewables: When and Where Makes a Big Difference<br>
<br>
By Steve Connors, Mike Adams, Kate Martin, Ed Kern<br>
LFEE - Analysis Group for Regional Electricity Alternatives<br>
<br>
Wednesday, October 8<br>
12:00-1:30 p.m.<br>
Room E40-496</font></div>
<div><font color="#000000"><br>
ABSTRACT<br>
Researchers at the LFEE's Analysis Group for Regional Electricity
Alternatives recently completed a project for the EPA looking at the
avoided emissions from solar photovoltaic generation across the
contiguous 48 states. To do this they compared hourly PV
generation from PV systems and compared it to the emissions from
fossil units in the same power grid, in the same hour. The
project took the additional step of identifying, by hour, fossil units
in the same power pool responding to changes in electricity demand
(including self generation like PV), so called "Load Shape
Following" (LSF) units.<br>
<br>
To achieve this AGREA took the EPA's "raw" generation and
emissions data (1998 through 2002) and created a (fossil) unit based
database. Units were then flagged as "load following,"
and hourly avoided emissions rates by power pool (NERC subregion)
calculated. These rates were then used to calculate the emissions
avoided by PV generation. Regional differences are great.
Annual avoided emissions from a kW of installed PV can be larger in
some power pools than other power pools with considerably more sun.
Also, depending on what type of units are "on the margin"
(load shape following), avoided emissions rates can be higher or lower
(by region and/or time of day/year) than average fossil emissions.<br>
<br>
Preliminary "data mining" of the avoided emissions database
has highlighted many interesting facets of power system operation,
daily and seasonal emissions, including possible dynamics among
electricity demand, renewable energy resources, demand-side
management, inter-regional power flows, and electricity
storage.</font></div>
<div><br></div>
<div>Bring your lunch. Light refreshments will be
provided.</div>
<div>___________________________________________________</div>
<div><br>
If you would like to be added or removed from this mailing list,
please</div>
<div>contact Karen Gibson, kgibson@mit.edu</div>
<div><font face="Geneva" color="#000000">-- <br>
_________________________________</font></div>
<div><font face="Geneva" color="#000000">Karen L.
Gibson</font></div>
<div><font face="Geneva" color="#000000">Program
Assistant</font></div>
<div><font face="Geneva" color="#000000">MIT Laboratory For Energy and
the Environment</font></div>
<div><font face="Geneva" color="#000000">77 Massachusetts Avenue,
E40-469</font></div>
<div><font face="Geneva" color="#000000">(1 Amherst St., E40-469 - for
DHL and FedEx)</font></div>
<div><font face="Geneva" color="#000000">Cambridge, MA 02139
USA</font></div>
<div><font face="Geneva" color="#000000">Tel: 1 (617) 258-6368;
Fax: 1 (617) 258-6590</font></div>
<div><font face="Geneva"
color="#000000">http://lfee.mit.edu</font></div>
<div><font face="Geneva"
color="#000000">http://globalsustainability.org</font></div>
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