## Question

###### A steam plant operates on a reheat Rankine cycle and has a net power output of...

A steam plant operates on a reheat Rankine cycle and has a net power output of 80MW. Steam enters the high pressure turbine at 10 MPa and 500 °C and the low pressure turbine at 1 MPa and 500 °C. Steam leaves the condenser as a saturated liquid at a pressure of 10kPa. The efficiency of the turbine is 80% and the efficiency of the pump is 95%. Determine the thermal efficiency of the cycle. Rankine Cycle with Reheat

## Answers

Given not power output from the plant is = $0 MH. pump worla Judo 31 soic COM - Imps 10000 2 /1 = 360.00101) de = 0.00101X (10,000-10) We = 10.0899 89 lleng from steam tables hehe = 10.0899 ha = 3373. 6 g/kg S3 = 6.5965 leg logik has hit 10.0899 = 201.899 h5=3428.4 billig teat supplied a harha 55=7.7641. GR Q = 3173.6 - 101.699 Si=ff = 0.6492 Tas, s 3191.7 kJ/kg h = 191-51 Vi = 0.001010 mL sz= sy = 6.5985 hq at Ampa anda su from steam tables hu= 2750 kg Hey Offj= Schereby to My = foy. = hig- by 3373.6- hy! - hachy 3373.6-27.50 huls 2898.72 kJ /kg dre = hos the '= 3498.4-2890.72 = 599-68 kg Ikg at lokpa and 55=5o = 7.41 0.6492 SEC fol 1501no Sul = shot no (Igo-sfe) 7.764 eam = 0.6492 t no 8.1501 - 81692) hf 191.54 hdg =2392.2 ne = 0.9u8 hoz 191.814 46 (2392.4 he= 2460.26 kJ lkg Whet in (at two] horhal waar Mr = oor? hsche 3498.4-he! $478.4-2410.4 2663. st. 20 30903 = m [lag-hub + Thr-h6efray vergoedifs = m (18541.62496.92) +(2418-4 – 263.mj) me soxiol = 62.044 kg mz 1289-4 Total heat suplied = m/Osit Ose) = 61.044 ( 3171.77 579-689 ols = 234.086 MJ m = thermal ethiciency a War - sox Who thering th e X 100 294. Oro 1 Myth 34.1954

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