Additional Information on Project Components
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1 Additional Information on Project Components A. Part A: Ashuganj 450 MW Combine Cycle Power Plant 1. Description 1. The proposed project involves retirement of the existing combined cycle power plant (CCPP) comprising of GT1, GT2 and ST (2 x 56 MW and 1 x 34 MW), ST 1 (64 MW) and ST 2 (64 MW) with replacement by 450 MW CCPP with suitable power generation technology. A comparison of various technological options (combined cycle, steam and gas turbine power plants) was carried out to determine the most appropriate technology for the new power plant. The assessment indicates that combined cycle power plant is the best option for Ashuganj due to the following: (i) lower capital cost (ii) higher efficiency resulting in lower fuel consumption and lower environmental pollution per kwh generated (iii) short lead time for construction and modular installation (iv) smaller number of operation and maintenance personnel required compared with conventional steam power plants 2. In retiring the above-mentioned power plants, a daily supply of 70 million standard cubic feet (MMSCF) of natural gas will be available for the new power plant. The study estimated that the available gas can support a combined cycle power plant with field capacity of 450 MW. 2. Plant Configuration 3. Two plant configurations were analyzed and that the 1:1:1 configuration (1 GT+ 1 HRSG + 1 ST) is found to be suitable than 2:2:1 arrangement due to the following: (i) Though the 2:2:1 configuration could support slightly higher capacity than the 1:1:1 arrangement, its efficiency rating is relatively lower. (ii) The land available in Ashuganj could only accommodate the 1:1:1 plant layout (in multi shaft arrangement, with heat recovery boiler and balance of plant equipment). 3. Electricity Generation 4. Plant availability of combined cycle power plants is relatively high at around 90%. The plant s own use is estimated to be 3.9% of the total generation. The project s annual energy production at various load factors is shown in Table 1. Table 1: Annual Generation Generating Plant Factor Capacity (%) MW Gross Annual Generation (GWh) Station 3.9% Net annual Generation (GWh) (GWh)
2 4. Estimated Project Cost Table 2: Estimated Cost of Investment (US $million) ADB IDB Local Total Fund Fund Currency Cost Investment costs Civil Works Equipment Environment and Social Mitigation Land Acquisition and Development Costs Consulting Services (Project Implementation) Consulting Services (Training) Freight and Insurance Local Transportation Overheads Subtotal (A) Total base cost Contingencies Physical Price Subtotal (B) Financing Charges During Implementation Interest during implementation including commitment charges Subtotal (C) Total Project Cost (A+B+C) Tax funded by GOB Note: Taxes and Duties Applicable Custom Duty : 3% on Plant and Machinery Exchange 70 Contingencies Physical : Assumed at 8% Price : Indexed to Inflation - domestic and international ADB loan at 5%, 5 years grace and 15 year repayment Domestic loan 3%, 5 years grace and 15 year repayment
3 B. Part B (i): KAPTAI 5 MW SOLAR PV PLANT 1. Description 5. Bangladesh s Renewable Energy Policy issued in 2008 aims to increase the share of renewable energies to 5% of the total power generation in 2015 and 10% by Among the renewable energy resources, solar, biomass and wind are the most abundant resources that could play an important role in meeting these targets. At present, most of the projects implemented in the country are off-grid systems with small installed power capacities. While offgrid options contribute significantly in providing energy services in rural areas, the market for large-scale grid connected renewable energies is equally important in meeting the country s energy supply requirements. The proposed project aims to demonstrate large-scale grid connected renewable energy project in the country. The project will demonstrate the technical feasibility of grid connected solar PV system and serves as capacity building tool for large scale grid connected renewable energy project in Bangladesh. 2. Project Location 6. The Kaptai site is located at N22 29'30.54" and E92 13'34.44" with elevation of around 36 meters above mean sea level inside the Karnifuli Hydropower complex. The proposed site is located at the apron side of the dam. The total land area available for solar PV plant is around 7-8 hectares. The land is currently idle, with grasses, bushes and few trees that need to be cleared. An old warehouse is situated on the middle-eastern part of the site while a concrete ramp, army tin shade and army barracks are situated on the south eastern side of the location. The western boundary is the downstream of the Karnifuli river. 3. Infrastructure 7. A road network exists inside the hydropower complex which provides access to the proposed site. The power generated by the proposed project will be fed-in to the local grid. An existing substation is situated around 2 km from the site. An 11 kv overhead line needs to be constructed along with a control room structure with panel, circuit breaker and protective devices. Water for cleaning is available through the existing water supply in the complex. 4. Technical Design 8. For the conceptual design, typical and widely available mid-price range poly-crystalline modules were chosen in the analysis. At a module capacity of 220 Wp Kaptai plant will have a total of 22,728 modules which makes up an aggregate capacity of 5000 kwp. Due to the large size of the Kaptai plant, a central inverter concept was chosen. Five central inverters of 1000kW each would be required for the Kaptai site and a maintenance stock of spare parts can be kept on site. In order to keep the voltage and current constraints of the inverters 24 modules are connected in series to make up a string and 947 such strings are connected to 5 inverters Hence, the electrical design is kept simple and modular. The nominal AC capacity of the plant is 5000 kwp. 5. Estimated Cost
4 Table 3: Estimated Cost of Investment (US $million) Foreign Local Total Exchange Currency Cost Investment costs Civil Works Equipment Environment and Social Mitigation Land Acquisition and Development Costs Consulting Services (Project Implementation) Consulting Services (Training) Freight and Insurance Local Transportation Overheads Subtotal (A) Total base cost Contingencies Physical Price Subtotal (B) Financing Charges During Implementation Interest during implementation including commitment charges Subtotal (C) Total Project Cost (A+B+C) Tax funded by GOB C. Part B(ii): HATIYA SOLAR PV-WIND-DIESEL HYBRID SYSTEM 1. Description 9. This project incorporates renewable energies and reinforces the isolated grid network in Hatiya island. The project will demonstrate the integration of 1 MW solar PV and 1 MW wind power projects and reinforce the existing oil-based power generation in the island. 2. Location 10. Hatiya island is situated at the mouth of Megna river in the northern Bay of Bengal in Bangladesh. The proposed site was identified based on load demand proximity, land availability and willingness of land owners to sell their land for power plant site development. The project site is located at the central part of the island with elevation of more than 13 meters above mean sea level. The proposed solar PV site is situated in a village 8 kilometers south of Hatiya centre
5 and relatively close to the load centre. Around 10 hectares of land could be acquired from private landowners in the proposed site. 3. Infrastructure 11. The site is at the intersection of the main road of Hatiya and feeder road to the east of the island. Power will be evacuated through an existing 1kV distribution line. Repair works must however be carried out of the existing island grid. A 4 kilometer 11 kv line will be installed to connect the wind power site to the solar PV site. 4. Technical Design 12. The hybrid option will mainly consist of diesel generation set, solar PV array, wind turbine generators, battery banks and inverters. As a pilot solar-wind-diesel hybrid system project, the capacities of solar PV and wind turbine generators were predetermined to be 1000 kw each. The optimization model determines the capacity of diesel generator required in meeting the total electricity demand. The optimization results show that the least-cost option is the combination of the following: 1000 kw solar PV (DC generation) o Using 220 Wp solar PV panels, a total of 4,546 modules will be needed for the project 1000 kw wind turbine generator (AC generation) o Using 250 kw wind turbine generators, 4 units will be needed for the project 5500 kw diesel generation (AC generation) 5. Electricity Generation 13. With this system configuration, diesel generator acts as swing electricity producer. Solar PV and wind turbine power generation, when available, will be given dispatch priority and the balance generation requirement will be supplied by the diesel generator. The required electricity generation is estimated to be 20,539,228 kwh per year. Table 4 shows different parameters associated with energy production calculations. Table 4: Energy Production Modeling Parameters Solar PV generation In estimating energy yield from solar PV, various factors were considered in the study: Array and system losses: 20 % Module degradation: 0.5 % per year Plant availability: 98 % Transformer losses: 1.1% Plant life: 20 years Solar PV energy yield indicators are the following: Average annual generation: 1,401,446 kwh per year Average capacity factor: 16.8 % Overall yield factor: 1,401 kwh/kw
6 Wind Turbine Generation Factors included in estimating yearly energy production form wind turbines are the following: System losses: endogenously calculated by the model taking into account turbine technical specifications and specific power curve Blade degradation: 0.5% Plant availability: 98 % Transformer losses: 1.1% Plant life: 20 years The energy yield indicators are the following: Average annual generation: 1,638,484 kwh per year Average capacity factor: 18.7 % Overall yield factor: 1,638 kwh/kw Diesel Generation Diesel generation was estimated using the following technical parameters: Diesel generator heat rate: 7840 kj/kwh Operating reserve: 10% Auxiliary consumption: 5% Light Fuel Oil heating value (LHV): MJ/kg Internal engine losses: 3% Diesel plant life: 20 years The resulting diesel generation parameters are the following: Average required generation: 20,211,689 kwh per year Average fuel consumption: 4,191 thousand liters per year 6. Estimated Cost of Investment Table 5: Estimated Cost of Investment (US $million) Foreign Local Total Exchange Currency Cost Investment costs Civil Works Equipment Environment and Social Mitigation Land Acquisition and Development Costs Consulting Services (Project Implementation) Consulting Services (Training) Freight and Insurance Local Transportation Overheads
7 Subtotal (A) Total base cost Contingencies Physical Price Subtotal (B) Financing Charges During Implementation Interest during implementation including commitment charges Subtotal (C) Total Project Cost (A+B+C) Tax funded by GOB D. Part B(iii): SOLAR PV LED STREET LIGHTING PROJECT 1. Project Description 14. The main benefits of street lighting include provision of security to communities and improvement of driving visibility contributing to safe vehicular movement. The costs of providing street lighting (installing, energizing and maintaining street lights), however, becomes a huge burden to almost all city governments in the world. Of these costs, energizing the street lights represents a single biggest component. 15. The utilization of LED (light emitting diode) lamps reduce lighting intensity requirements (from baseline lighting technologies) and improves energy efficiency thus reducing overall electricity consumption for street lighting and lowering down electricity costs. The combined use of LED lamps and solar PV for street lighting further reduces the annual costs in the provision of street lighting services. Solar PV in tandem with LED lamps for street lighting improves electricity services (by freeing up electricity consumption of street lights and making it available to other consumer segments) and contributes to the Bangladesh energy sector goals of improving energy security, environmental protection and to global objectives of reducing of greenhouse gas emissions. This also supports to Bangladesh s Renewable Energy Policy which aims to increase the share of renewable energies to 5% of the total power generation in 2015 and 10% by The proposed project aims to demonstrate the technical feasibility of solar PV and LED lamps for street lighting in Bangladesh and serves as capacity building tool for the use of energy efficient lighting technology and renewable energies for street lighting services. 2. Project Site Location 17. Specific streets to be replaced with solar PV LED street lamp have not been identified yet but a tentative allocation by city could be based on their shares of the total length of streets. This allocation is shown in Table 6: below. Table 6: Tentative allocations of solar PV LED street lighting project
8 City Corporations Estimated length of streets Share Share in 1000 km street lamp project Km percent km Chittagong Syllhet Khulna Dhaka Rajshali 300* Barishal 200* TOTAL 4, *estimated 3. Summary of Technical Specifications 18. The summary of the technical design parameters are shown in Table 7. Table 7: Solar PV LED lamp technical parameters Road Type A1 A2 A3 LED lighting illuminance 15 lux 11 lux 9 lux requirement Pole height 8 meters 8 meters 6 meters Pole spacing 30 meters 30 meters 30 meters Luminous efficiency (assumed) 95 lumens/w 95 lumens/w 95 lumens/w LED luminaire wattage Power supply System power rating 40 W 15 W 55 W 30 W 10 W 40 W 15 W 5 W 20 W Solar PV array size 140 Wp 100 Wp 50 Wp Battery size 200 Ah, 12 Volts 150 Ah, 12 volts 75 Ah, 12 volts 4. Estimated Cost Table 8: Estimated costs (US $million) Foreign Local Total Exchange Currency Cost Investment costs Civil Works Equipment Environment and Social Mitigation Land Acquisition and Development Costs Consulting Services (Project Implementation) Consulting Services (Training) Freight and Insurance Local Transportation Overheads Subtotal (A)
9 Total base cost Contingencies Physical Price Subtotal (B) Financing Charges During Implementation Interest during implementation including commitment charges Subtotal (C) Total Project Cost (A+B+C) Tax funded by GOB E. Emission Reduction 19. Table 9 shows the baseline emissions estimated for Bangldesh electricity sector based on the JICA Master Plan Update of Table 9: Baseline CO2 Emissions Net Generation baseline emissions based on Emission Factor million tons CO2 GWh tco2/mwh , , , , , , , , , , , , , , , , , , , ,
10 , The CO2 reductions achieved against these baseline emissions, under the renewable energy components are presented in Table 10. Table 10: CO2 Emission Reductions Hatiya Year Kaptai Solar PV (tco2) Street-lighting (tco2) (Solar-Wind) (tco2) Total (tco2)
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