tailieunhanh - Gas Turbines Part 6

Tham khảo tài liệu 'gas turbines part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 114 Gas Turbines Fig. 5. The simplified temperature heat flow rate T ữ diagram before and after changing the flow rate AF of the raw material performing heat integration HI and cogeneration before and after AF. molar heat capacity cm amount flow rate F The inlet temperature Ttur in is kept constant. The thermodynamic efficiency of the medium pressure turbine ntur and the mechanical efficiency of the generator ngen is supposed to be 85 for each. The annual depreciation of the medium pressure turbine cd tur in EUR a is a function of the power Ptur Biegler et al. 1997 Cd tur 22 946 Ptur 4 10 The published cost equations for the equipment are not usually adjusted to the real higher industrial costs therefore the costs are multiplied by a factor 4 determined by experience. Heat exchanger H The residual heat in the heat exchanger H can usefully be applied to the heat integration. The heat flow 0 can be calculated with known inlet TinH and outlet temperatures ToutH by using equation 11 TinH - ToutH CFh 0H 11 where cFH is the heat capacity flow rate of the stream in heat exchanger. Electricity Cogeneration using an Open Gas Turbine 115 Separator S The separator has the task of separating liquid from the vapour phase. The product is in liquid phase. Vapour flow is compressed in the compressor C . The balanced amounts of the separation for all the components s are Fin Fout v Fout l 12 F n xin Fout v xout v F out l xout l s 1 . S 13 S t xout vs 1 s S t xout ls 1 s 14 15 Ks ds cs T ut bs T ut 2 s 1 . S 16 where ds cs and bs are equilibrium constants during separation xout vs . xout ls s 1 . S 17 The inlet amount flow rate for separation Fin is the sum of the outlet amounts flow rates of the vapour Fout v and liquid phases Foutb see Equation 12 . Equation 13 includes the amount flow fractions. x is the amount fraction in vapour v or liquid phase l . The equilibrium constant K of the sth component during separation is a function of temperature see Equation 16 .

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