Cooling_Tower _Water_Intake_Presentation.pptx

CT

1. KIYANLY 1574 MW COMBINED CYCLE POWER PLANT PROJECT Cooling Tower and Water Intake Overview 26 June 2024

2. Water Intake Facility Cooling Tower v.s Once Through Cooling Tower

3. INTAKE ve OUTFALL Location / Caspian Sea Water Level by Years According to the attached graph, the decrease in sea level has accelerated compared to the past and has decreased by 1.5 meters in total in the last 20 years.

4. Cooling Tower v.s Once Through Comparison – Block Flow Diagrams Wednesday, June 26, 2024 4 4 3200 m3/h Sea Water 1300 m3/h Sea Water Sea Land Water Intake Water treatment plant Cooling Tower for Block-1 Cooling Tower for Block-2 93880 m3/h Sea Water 93625 m3/h Sea Water Water Intake Pretreatment Condenser for Block-1 Condenser for Block-2 Water treatment plant Condenser for Block-1 Condenser for Block-2 Sea Land Cooling Tower Once Through Cooling System * this configuration is preliminary and may change based on detailed design Pretreatment

5. Cooling Tower v.s Once Through Comparison / Auxiliary Consumptions COMPARISON Once-through Cooling, kW Cooling Tower, kW Preliminary Auxiliary Consumptions for Cooling System Main Equipment (kW) Main CW Pumps 22,200.00 Main CW Pumps 7826.00 Aux Cooling Pumps 300.00 Aux Cooling Pumps 300.00 Raw Water Pumps 145.00 Raw Water Pumps 783.00 Cooling tower 0.00 Cooling tower 2170 Make up pumps 0.00 Make up pumps Incl. RW TOTAL-kW 22,645.00 TOTAL-kW 11,079 Guaranteed Output Power @ISO Condtions 1574 MW 1574 MW Auxilary consumption for Once Through Cooling system is higher than Cooling Tower option.

6. Cooling Tower v.s Once Through Comparison / Maintenance Once-through Cooling Cooling Tower Maintenance Maintenance is Hard (For the off-shore side, higher pipe size, higher water demand and large water intake system) Maintanence of off-shore side equipments & pipeline is the most complicated operation in the power plant. High demand for water and high pipe size can cause following; -High maintenance duration and high cost -High-capacity equipment requirements -High inspection and maintenance frequency -High professional diver requirement -High risk of blockage water intake due to the sediment deposits. -High Equipment Replacement/Upgrade frequency Maintenance is Easier ( For the off-shore side, lower pipe size, lower water demand and small water intake system) * Standard & Basic Equipments inspections and maintanence works. * 1 set of Fan & motor shall be provided as spare in warehouse for each block. 1 cell for each Cooling Tower shall be provided . * Possibility of maintenance during operation Daily * Check the dangerous wastes such as (iron wire, large boxes...) in front of the screen in the channel and stop intake system for cleaning * Clean all bars and screen with the jet water * Check flow rate and dredg e to sufficient depth with using dredgers if needed Visual check and clean if needed Weekly General visual inspection and cleaning of intake equipments Visual check and clean if needed Monthly * Lubrication for mechanical parts ( l ift i ng device,perforated screen, travelling grab screen * Visual inspection of logs and frame. Check if there is no damage to the frame, logs or seals. * Open the front protective panels for Perforated Screen and Clean all Equipments Visual check - Routine check for oil level, oil quantity and alignment of the shaft. 3 Months Lubrication for mechanical parts ( l ift i ng device,perforated screen, travelling grab screen Lubrication for mechanical parts. (Gearbox- bearings ) 6 Months Lubrication for mechanical parts ( l ift i ng device,perforated screen, travelling grab screen *Check the rubbers and replace if they are worn or damaged. * Check and replace sealing elements. Visual check and clean if needed Annual * Lubrication for mechanical parts * Visual check of mechanical equipments and replace * Visual check and repair (if needed) for concrete block connections on the offshore pipes with special diving team. * Visual check and repair (if needed) for Electrochlorination pipes supports inside offshore intake pipes. * Visual check and cleaning of concrete filters for off-shore intake pipes inlet side with special diving team *Maintenance of gear unit and motors * Check and replace (if needed) sealing elements-perforated plates-chain parts for Perforated Screens * Inspection and Maintanence (if needed) of noz z l es , * Inspection and cleaning of fins, filters, sump pit (if needed) * Inspection and Maintanence (if needed) of gearbox .

7. Cooling Tower v.s Once Through Comparison / Chemical Consumption COMPARISON Once-through Cooling Cooling Tower Chemicals for Cooling Water Electrochlorination dosing: ~200 kg /h Electrochlorination dosing: ~ 17 kg/h Chemical Consumption for Once Through Cooling system is higher than Cooling Tower option .

8. Cooling Tower v.s Once Through Comparison / Main Cooling Water & Salinity COMPARISON Once-through Cooling Cooling Tower Main Cooling Water (each condenser block) 45.760 m3/h 32,280 m3/h Intake Water 93.880 m3/h 3200 m3/h Outfall Water 93.625 m3/h 1.300 m3/h COMPARISON Once-through Cooling Cooling Tower Inlet Sea Water Salinity 1.15 % 1.15 % Discharged Sea Water Quality (Salinity %) 1.15 % 2.3 % No any other difference on quality between once through and mechanical cooling system except salinity rate. Since the flow rate is very low, the effect of the increase in salinity on the sea will be negligible.

9. Cooling Tower v.s Once Through Comparison / Material COMPARISON Once-through Cooling Cooling Tower Material Blade : FRP (fiber-reinforced polymer) Hub: Fabricated steel (epoxy/C5 painted) Fasteners: Duplex SS 2205 The fiber-reinforced polymer is a blended material utilized to make the FRP cooling tower used in industries today. In summation, it can resist any weather situation and withstand corrosion, waterborne bacteria, and organisms. For nearly 3 decades, FRP (Fiberglass reinforced plastic) cooling towers have been succesfully built and have been in operation and that too for sea-water. All these towers as well as concrete towers are equipped with FRP fan assembly, which is lesser in weight & less prone to corrosion. The fan hub can be hot dip galvanised with epoxy painted, which would minimise corrosion. Similarly all fasteners for the tower structure shall be of Duplex SS 2205, which is a proven material.

10. Cooling Tower v.s Once Through Comparison / Circulating Water Pumps Power consumption of Cooling Tower Circulation pumps is less than one third of Once through system Circulation pumps. COMPARISON Once-through Cooling Cooling Tower Circulating Water Pumps preliminary parameters Type : Vertical Pumps Type : Vertical Pumps Fluid : Sea Water Fluid : Sea Water Flowrate : 24000 m3/h Flowrate : 16385 m3/h Head : ~60 m Head : ~30 m Motor Rating: 6000 kW Motor Rating: 2100 kW 2 x 50% for each block 2 x 50% for each block

11. Cooling Tower v.s Once Through Comparison / Maintenance during operation COMPARISON Once-through Cooling Cooling Tower Maintenance during operation Each cell is independent and can be undertaken for maintenance. Besides, one set of Fan & motor shall be provided as spare in warehouse for each block.

12. Cooling Tower – General view

13. Cooling Tower – General view

14. Cooling Tower – General view

15. Cooling Tower – Main Cooling Water Lines to Condenser

16. Cooling Tower – Basic A cooling tower is an equipment used to reduce the temperature of a water stream by extracting heat from water and emitting it to the atmosphere. Cooling towers make use of evaporation whereby some of the water is evaporated into a moving air stream and subsequently discharged into the atmosphere. As a result, the remainder of the water is cooled down significantly. Cooling towers are able to lower the water temperatures more than devices that use only air to reject heat, and are therefore more cost-effective and energy efficient .

17. Cooling Tower Components Frame and Casing Most towers have structural frames that support the exterior enclosures (casings), motors, fans, and other components. With some smaller designs, such as some glass fiber units, the casing may essentially be the frame.

18. Cooling Tower Components Fill Most towers employ fills (made of plastic or wood) to facilitate heat transfer by maximizing water and air contact.

19. Cooling Tower Components Cold-water basin The cold-water basin is located at or near the bottom of the tower, and it receives the cooled water that flows down through the tower and fill. The basin usually has a sump or low point for the cold-water discharge connection. In many tower designs, the coldwater basin is beneath the entire fill. In some forced draft counter flow design, however, the water at the bottom of the fill is channeled to a perimeter trough that functions as the coldwater basin. Propeller fans are mounted beneath the fill to blow the air up through the tower. With this design, the tower is mounted on legs, providing easy access to the fans and their motors. Drift eliminators These capture water droplets entrapped in the air stream that otherwise would be lost to the atmosphere.

20. Cooling Tower Components Air inlet This is the point of entry for the air entering a tower. The inlet may take up an entire side of a tower (cross-flow design) or be located low on the side or the bottom of the tower (counter-flow design).

21. Cooling Tower Components Louvers Generally, cross-flow towers have inlet louvers. The purpose of louvers is to equalize air flow into the fill and retain the water within the tower. Many counter flow tower designs do not require louvers. Nozzles These spray water to wet the fill. Uniform water distribution at the top of the fill is essential to achieve proper wetting of the entire fill surface. Nozzles can either be fixed and spray in a round or square patterns, or they can be part of a rotating assembly as found in some circular cross-section towers.

22. Water Intake Facility – Preliminary Layout (1)~(3) Stop Gate (4) Bar Screen (5) Traveling Screen (1) Stop Gate (2) Stop Gate (3) Stop Gate (4) Bar Screen (5) Traveleing Screen PUMP

23. Water Intake Facility – Preliminary Layout (1) Stop Gate (2) Stop Gate (4) Bar Screen (5) Traveleing Screen (3) Stop Gate PUMP

24. Water Intake Facility – Equipments / Components Stop Gate

25. Water Intake Facility – Equipments / Components Revolving Bar Screen

26. Water Intake Facility – Equipments / Components Traveling Bar Screen

27. Water Intake Facility – Equipments / Components Wash Water System [ end of presentation ]