Contents (English)



Fuel saving in the UK (2016)                        Rebuttal of an article in Energy Policy of Jan 2017

    “Thomson et al. have not succeeded to prove, that wind energy in England saves even more fuel than given by the nominal calculation of DECC. The data presented points partially to the contrary. Calculation errors and the tendency to work towards a politically favoured statement make the article unthrustworthy.”


Narrative Suir Valley                                               Talk given Jan. 20th 2016 in Clomnel (Ireland)

  “The efficiency of fuel saving due to 16,2% wind in the Irish grid is 35%.

    “With higher wind penetration the efficiency will be less than 35%.

    “Clearly the ambition of 40% wind cannot be realised in the present grid.”


Losses in the Irish grid, SEAI report                    Fred Udo and Patrice de Rougemont 2016

Operational losses due to the insertion of wind energy are calculated to be 60% of the nominal fuel saving.


Wind Turbine build-outs in Ireland (2015)           Lessons for the Dutch ambitions

The performance of the Irish system in 2011 shows clearly, that the system emits less CO2 without the extra wind turbines and without the E-W link, but with the new CCGT gas  units.


Energy and Environment   2014                            F. Udo, C. le Pair, K. de Groot , A.H.M. Verkooijen  and C. van den Berg                               

    It is shown from performance data that three factors reduce the fuel saving due to wind energy to less than 38% of the nominal saving. They effectively reduce the planned wind contribution from three to just over one percent of the country’s  energy consumption.


Europhysics News   2012                                       F. Udo, C LePair en K. de Groot

WINDTURBINES AS YET UNSUITABLE AS ELECTRICITY PROVIDERS.

    “We conclude that the money spent on subsidizing the large-scale introduction of wind energy can better be spent on energy R&D.”


Submission House of Commons   (2012)                 Alex Henney and Fred Udo

DOES WIND SIGNIFICANTLY REDUCE CO2 EMISSIONS IN A THERMAL SYSTEM

OR DOES THE LAW OF UNINTENDED CONSEQUENCES PLAY IN?

  

Building windturbines    (2013)                                  How long does it take to recuperate the energy invested in a windturbine?

Nearly 10% of the total energy generated in 20 years by a wind turbine is spent on the building and operation of the machine itself. This result is derived from the calculations of Lenzen et al and the literature cited by the authors . The result can be best expressed in a payback time of 23 months.



Analysis of the 15’ data from Eirgrid.

 

Windpower in the Irish system (2011)                        Study based on the 15’ data of Eirgrid.

    It is shown, that in absence of hydro energy the CO2 production of the conventional generators increases with wind energy penetration. The data shows that the reduction of CO2 emissions is at most a few percent, if gas fired generation is used for balancing a 30% share of wind energy.


Curtailment in the Irish power system   (2012 )      

This analysis of the Eirgrid data shows, that wind contributions above 20% become very unpractical in a thermal grid. A wind capacity, that is built to deliver 50% of the Irish demand for electricity, will in reality only contribute 35% to the total production.



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