part 1: overview of cogeneration and its status in asia - Fire

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Summary of country study – Bangladesh 151 What if the electricity price escalates faster? Internal Rate of Return (IRR) 49% 47% 45% 43% 41% 39% 37% 35% REPM GTPM 6% 7% 8% 9% 10% 11% 12% 13% % of Increase Fuel Price Escalation Rate From the sensitivity analysis of the potential cogeneration alternatives for the textile processing mill, the reciprocating engine power match option meeting power requirement of 875 kW is found to be the most suitable cogeneration system. It represents an initial investment of 37 Million Taka and leads to an internal rate of return of 40.8 per cent. 3.3.5 Hospital This hospital operates throughout the year without any stop. Electricity is required for lighting, air conditioning and motors whereas as a lot of thermal energy is needed in the form of steam for various applications. Analysis of the monthly electricity and steam consumption data of 1997 led to the following: • Total Electricity Consumption in 1997: 7,108 MWh • Maximum Electricity Demand: 1,200 kW • Minimum Electricity Demand: 800 kW • Total Thermal Energy Consumption in 1997: 91.5 TJ • Maximum Steam Demand: 4.99 ton/hr Minimum Steam Demand: 3.90 ton/hr The power-to-heat ratio of the site was calculated to be 0.68 for 1997. Typical cogeneration system suitable for this site would be based on gas turbine. However, reciprocating engine and steam turbine cogeneration systems were also considered as potential alternatives. Results of the feasibility study are summarized in Table 3.9. The steam turbine option is found to be not suitable: (i) with steam turbine thermal match (STTM), less than 30 per cent of the power requirement is generated and the hospital will have to depend heavily on the utility grid; (ii) with steam turbine power match (STPM), 119 per cent excess heat are generated which has no commercial value. With the reciprocating engine thermal match (RETM) option, 475 per cent excess power is generated. The project profitability will depend on the buy-back rate. This may not be a good option as the purpose is not to earn from electricity sale. Reciprocating engine power match (REPM) option seems feasible as almost all the power needed can be met though there will be small (16 per cent) shortage in the heat supply. There is no need for an auxiliary boiler as this shortfall can be easily made up by auxiliary natural gas firing in the recovery boiler.
Summary of country study – Bangladesh 152 Table 3.9 Summary of pre-feasibility study of the hospital Major Parameters Steam Turbine Gas Engine Gas Turbine Ther mal Match Power Match Thermal Match Power Match Therm al Match Powe r Match Installed power (kW) 321.00 800.00 4,916.00 800.00 2,104.00 800.00 Fuel consumption (TJ/year) 111.90 279.10 485.60 79.00 252.10 95.60 Electricity generated (MWh) 2,668.00 6,658.00 40,9111.00 6,058.00 17,509.00 6,658.00 Heat generated (TJ/year) 89.50 22,308.00 89.50 14.60 89.60 34.00 Excess/deficit(-) power (MWh/year) -4,440.00 -450.00 33,8030.00 -450.00 10,401.00 -450.00 Excess/deficit(-) heat (TJ/year) -2.00 109.60 -2.00 -76.90 2.00 -57.60 Equipment power-to-heat ratio 0.107 0.11 1.870 1.87 .80 0.80 Total investment (million Taka) 18.47 46.08 212.370 34.56 100.99 38.40 Net present value (million Taka) 25.55 33.32 306.070 69.86 137.00 66.51 IRR (per cent) 35.20 26.00 35.90 43.50 34.80 39.80 With gas turbine thermal match (GTTM) option, about 146 per cent excess electricity is generated, which has to be sold as in the RETM option. Gas turbine power match (GTPM) option takes care of all the power needs though heat deficit is as high as 60 per cent. This will require the adoption of auxiliary natural gas firing in the recovery boiler. Accordingly, the sensitivity analysis carried out to see the impacts of the increase in the investment, fuel and electricity price escalation, was limited to REPM and GTPM options. What if the investment cost increases? Internal Rate of Return (IRR) 42% 40% 38% 36% 34% 32% 30% What if the fuel price escalates faster? Internal Rate of Return 41% 40% 39% 38% 37% 36% 35% REPM GTPM 1% 3% 5% 8% 10% 13% 15% % of Increase Investment Cost REPM GTPM 5% 6% 7% 8% 9% 10% 11% 12% 13% Fuel Price Escalation Rate
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PART 1: OVERVIEW OF COGENERATION AN
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4 Part I: Overview of cogeneration
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State of art review of cogeneration
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Policy framework for promoting coge
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Cogeneration in Asia today 49 1.1 I
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Cogeneration in Asia today 51 4,000
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Cogeneration in Asia today 53 1.3 T
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Cogeneration in Asia today 55 1.3.3
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Cogeneration in Asia today 61 1.7 R
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Cogeneration in Asia today 63 Every
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Cogeneration in Asia today 65 Cogen
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68 Part II: Cogeneration experience
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Cogeneration experiences around the
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PART 3: SUMMARY OF COUNTRY STUDIES
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part 1: overview of cogeneration and its status in asia - Fire

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