Power Hungry Chapter 9 Myth: Wind Power Reduces CO 2 Emissions Presented by: Stephen Berwick.

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Presentation transcript:

Power Hungry Chapter 9 Myth: Wind Power Reduces CO 2 Emissions Presented by: Stephen Berwick

Facts  There is not a single study based on actual data from existing wind turbines that can prove that wind power reduces CO 2 emissions  All turbines require back up dispatchable hydrocarbon electric generation capacity  More expensive because of non-sustainable power and need for back up generators.  Capacity factor =amount of time producing 100% max output  For wind turbines Capacity is typically 10-20% of max rated value

Examples outside of USA  China wants to build new “Green Cities” powered by wind farms, but to accomplish this, dozens of new coal-fired power plants will be needed to meet the power demands.  Denmark uses hydropower back up generators but has seen no reduction in CO 2 emissions

Example Texas  Top wind generating state in the US  2008 Texas installed 2,700mega watts of wind turbines in 2009 and it was determined that the turbines had a capacity factor of 8.7%  In mid-2009 there were 8,203MW of wind power with an estimated 708MW of it considered reliable.  In summer Texas needs 72,648 MW and wind only accounts for 1% of the total energy needed, the rest in gas fired back up generators.

Generation capacity in Texas 2009,2014 *Horizontal axis in Megawatts

CERA Findings  CERA 2008 report “it is more expensive than conventional power generation in part because wind’s intermittent production patterns need to be augmented with dispatchable generators to match power demand.” “ In order to provide reliable capacity throughout the year, every megawatt of wind capacity need to be matched up with a megawatt of dispatchable capacity.”

Conclusion  Global Wind Energy Council claims that by 2030 global wind-power capacity will have a five-fold increase over 2007, generating 500,000 MW, which the group expects would cut CO2 emissions by 731M tons  1MW= 3.5*10^6 BTU Natural Gas=409 Lbs of CO 2  500,000MW wind energy *0.20 = 100,000MW  500,000MW * 409= 102,205 Tons of CO 2

Questions Q. What is the capacity factor of wind power. A % Q. What is the actual percent of wind power used in Texas. A. 1% Q. What picks up the slack when there is no wind. A. hydrocarbon back up generators.