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I.P.D.C.

The Integrated Solar Combined Cycle (ISCC) Power Plant Project in Yazd, Iran Mr. M.A.Tahani

© June 2002

Deputy Manager Ministry of Energy Iran Power Development Co. (I.P.D.C.)

I.P.D.C.

Basic technical data of the ISCC plant

Total electrical capacity (ISO conditions) Gas turbine capacity (ISO conditions) Steam turbine capacity (site conditions) Solar contribution (site conditions) Solar field thermal capacity Type of cooling

: : : : : :

430 MW el 2 x 115 MW el 200 MW el 67 MW el 185 MW th air cooled condenser (ACC)

© June 2002

I.P.D.C.

Basic economic data of the ISCC plant

Total investment: 322 million $ (thereof 85 million $ for the solar field)

Proposed distribution of the investment: 67 million $ : The gas turbines, already existing at the site, property of IPDC 150 million $ 50 million $ 55 million $

© June 2002

: : :

Investment of the Iranian Ministry of Energy anticipated grant of the GEF remaining, eventually soft loan by institutions like e.g. the German KfW

I.P.D.C.

Ownership of the Extension of the Existing Gas Turbine Plant at Yazd and Incentive for Solar Energy

1. 2. The extension could be owned by an IPP Two options for providing financial support for the solar field: (a) Giving a grant for construction, PPA with specification of required solar production (b) No grant for construction but relevant bonus payment for solar energy can be considered

© June 2002

I.P.D.C.

Levelized Electricity costs (LEC) for three plant variants

(according Fichtner study) (ISCC assuming the 50 million $ grant)

gas turbine plant combined cycle plant ISCC plant

: : :

15.44 /MWh 13.49 /MWh 15.23 /MWh

© June 2002

I.P.D.C.

Summary of natural site conditions:

· Annual sum of DNI · Max. wind velocity in 40 years · Max. wind velocity in average year · Average wind velocity · Slope · Current use of land

© June 2002

: : : : : :

2500 kWh / m² yr 32.5 m/s 25.0 m/s 2.5 m/s less than 1° none

I.P.D.C.

Interpretation of the natural site conditions:

The site characteristics described above are ideal boundary conditions for a solar thermal power plant for the following reasons: · The dry climate and the relatively high altitude lead to the high level of DNI (approx. 2500 kWh / m² yr). · The flat land leads to minimum or zero cost for site levelling. · The mountains surrounding the valley function as effective wind breakers. · The soil offers a strong hold for the foundations of the solar collectors. Thus small and hence cheap foundations can be used. · The large valley allows for almost unlimited extension of a solar thermal power plant. · The present non-usage of the land leads to negligible or even zero land costs.

© June 2002

I.P.D.C.

Infrastructural boundary conditions

Beside these natural boundary conditions, also the man made ones are very favourable: · Pipelines for oil and gas pass the site in a distance of approx. 1 km. The connection to the gas pipeline is already made for feeding the running gas turbines. · A highway and a railroad also pass the site in a distance of approx. 1 km. The city of Yazd has an airport with regular traffic to and from Tehran. · A 400 kV high voltage power line connects the site to the national electric grid. A substation for the running gas turbines is in operation. Capacity extension of the substation is foreseen. The power line is able to absorb the additional power of the ISCCS plant.

© June 2002

I.P.D.C.

Conclusion I

· The DNI situation is one of the best in the world. · The solar contribution to the ISCC plant is high in absolute figures (67 MW el). · The solar contribution to the ISCC plant is small in relative figures (15%). => good part load behaviour at night. · 67 % of the financing is born by the hosting country. · There is a strong will in political and industrial institutions to implement an ISCC plant in Iran. Hence a fast implementation of the project can be expected.

© June 2002

The last point is evident due to the fact that IPDC has already prepared the tender documents for the plant.

I.P.D.C.

Conclusion II

It can be concluded that the Yazd ISCC project is highly eligible for financial support by international financing organisations because: · it addresses international environmental issues like global warming and conservation of fossil fuels. · of the great Iranian contribution to the investment. Each $ of funding results in a higher environmental benefit than at comparable projects. · the preparatory work of the Iranian side underlines the ambition which drives this project. · the site conditions (natural and infrastructural) are ideal for an ISCC power plant.

© June 2002

I.P.D.C.

The site of the Yazd ISCC Plant:

It calls for the Solar Collectors to be installed

© June 2002

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