CO-GENERATION PLANT KUSHA INDUSTRY CO.

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1 CO-GENERATION PLANT

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3 History EDON was responsible for the design and construction management of two plants, which came into commercial operation in 1996, and operated and managed them for first two years. Now the owner has contracted out all the maintenance work for operational hours to ABB and EPON. The plants each have a total electrical capacity of 65 MW per plant and a heat generation capacity of 57 MW. This combined energy supply is generated at an efficiency of %85. The heat is sold to greenhouse horticultural enterprises in the area, which produce flowers, tomatoes, cucumbers and other vegetables. Both plants supplies about 100 greenhouses. The demand for heat is expected to rise. Kusha Industry Co.

4 The Technology: Co Generation The heat is produced by combined cycle units, each consisting of two gas turbines, an air-cooled generator, a steam turbine and two heat exchangers. Each plant has one unit consisting of a gas turbine, a steam turbine with a generator mounted in a single shaft configuration and second unit consisting of a gas turbine and a generator. The gas turbine and steam turbine in the first unit are connected to the generator via an automatic incoming clutch. Each plant can run on one gas turbine and the steam turbine. The steam turbines are configured with two steam outlets, which allows heat to be tapped at two temperatures before being transferred to the heating water in heat exchangers,. Residual heat from the flue gas is also used to heat the water, lowering the temperature of the flue gasses to about 80 C in the process. Kusha Industry Co.

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6 The Technology: Greenhouse Heating Systems Both Co-Generation plants are connected to extensive underground pipe networks. Hot water is transported along these pipes from the plants to heat delivery stations in greenhouses whichvary in capacity from 500 KW to 3000 KW depending on the consumer. Centrifugal pumps drive the district heating water through heat exchangers which transfer the heat to secondary heating systems in the greenhouses. The feed water is kept at a temperature of 95 C to 120 C and returns at a temperature of about 60 C to 65 C to be heated up again. The optimal temperature difference between the feed water and returning water depends on the outside ambient temperature. Kusha Industry Co.

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8 Seasonal Operation In the summer and during warmer periods in spring and autumn, less heat is required for the greenhouses that is produced by the Co -Generation units. During these periods plants produce warm water for homes or produce mainly electricity, and the surplus heat from the s eam turbine is removed in air-cooled condensers in this case. The efficiency of the plants is then about 46%. The generators at both plants are directly coupled by switches to a power transformer houses in a separate room, which raises the voltage from 10 KV to 110 KV. The electricity generated is transported through underground cables to the nearest high voltage substation, where the electricity is fed into distribution grid. Kusha Industry Co.

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10 Specifications and Performance Data Year of construction Gas Turbine Supplier Model Capacity Flue gas temperature Of turbine exhaust Flow NOx emission Steam Turbine Supplier Model Capacity Generator Supplier Capacity Plant Plant ABB Gt-10 B 25 MW ABB Gt-10 B 25 MW 535 C 77 kg/sec >45 gr/gj 355 C 77 kg/sec >45 gr/gj ABB VAX 20 MW ABB VAX 20 MW ABB 32 MVA/54 MVA ABB 32 MVA/54 MVA Kusha Industry Co.

11 Heat recovery steam generator Supplier Flue gas temperature Of boiler exhaust Capacity Pressure Steam temperature HP/LP District heating condenser Supplier Capacity Heat exchanger Stork Stork 80 C 10/2.5 kg/sec 80/7 bar 80 C 10/2.5 kg/sec 80/7 bar 500 C / 200 C 500 C / 200 C Hamon Lumus 47 MW Stork Kusha Industry Co. Hamon Lumus 47 MW Stork

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13 T +98(21) F +98(21) M +98(912) Info@kushaindustry.com