Question

20 points Save Anga LOS (20 pts) Consider the cogeneration plant shown in Figure below Steam enters the turbine at 5 MPa and 300 C Single Efect Evaporation desalination unit-Labelled as SEE in the block dia Some steam is extracted from the turbine at 500 kPa for process heating in a to the boiler pressure At simes of high demand for process heat, some steam leaving the ho steam continues to expand to 5kPa Seam is then condensed t constant gresmreand pumped fractions are adjusted so that steam leaves the process heater as a saturated Squid at 500 kPa The ma gh the expansion valve to 500 kPa and is outed to the process heerThe etron it is decided that 10% of the steam generated is exdracted before it enters the turbine through the expansion valve, and 70% of the generated steam is extracted from the turbine at 500 iPa for process heating of the SEE f steam through the boler is 10 kgis Twh Expc sabe Boler Fethaipy State Temp Pressure (Pa) 5000 5000 5000 500 500 6 500 15- s00 APs Jkgh 2924 2924 2924 1 2924 2487 1091 640 3 137 7 1428 7452 sAP 0-t 2 P SEE 300 232 5 151 8 32 88 151 8 32 68 3301 152 3 128 8 4 5 6 Mane 10 8680 P 11 447 modynamics property tables. Actual values are given in the table, and only those quanities relevant to calculations, use it to complete your calculations The ollowing data were extracted from Partt-Cogeneration calculations. Use the problem statement and given tabulated data to answer the following 1-The mass flow rate of the heating steam entering the SEE is 2-The temperature of the heating steam entering the SEE is 3-The process heat rate supplied to the SEE is 4-The turbine output power is 5-The net output power is 6-The cycle thermal efficiency is 7-The Plant utlization factor is kg's kW %

Answer 1

1,2, GVen o.7n balane hmass 500 e P lion dabCorreond iny to s00 t hy can 232, 5 C Get we C 5.02 X S02 Y 39.85 kh 9.888 h ip

C- + h-h Tuabin 3433 l(92 5125 kん ち075 .612 Net Power h4 Procen heat, Gp 640.3 x 24 -x 224 X 15210 6 kw

a24-4 544.7 Ch-h Qin 23 793 k Thamd fvany,- hUnlgahdo fachor, EhhutG