TY - JOUR

T1 - Analytical modeling of wet compression of gas turbine systems

AU - Kim, Kyoung Hoon

AU - Ko, Hyung Jong

AU - Perez-Blanco, Horacio

N1 - Funding Information:
This work was supported by the Korea Research Foundation (KRF) grant funded by the Korea government (MEST) (No. 2009-0074124 ). Appendix The temperature-averaged polytropic constant c wet and temperature-averaged polytropic coefficient n wet are defined in Eq. (22) and by using Eqs. (13) and (25)–(29) they can be obtained as follows. (A1) c wet = n wet n wet − 1 = η B 3 A 3 · ( 1 − β 1 J ) (A2) J = 1 3 a [ 2 ( a − b ) ln ( a − 1 a ) + ( 2 a + b ) ln ( a 2 + a + 1 a 2 ) − 2 3 b { tan − 1 ( a + 2 3 a ) − π 6 } ] (A3) A 0 = R a + ω t R v , A 3 = f 1 R v (A4) B 0 = c p a + ω t c p v (A5) B 1 = c 1 · ( h fg + c p v T 2 − c p w T s 2 ) , c 1 = 3 f 1 2 · ( T 2 − T 1 ) (A6) B 3 = f 1 c p v + c 1 · c p v · ( T 2 − T 1 ) − c 1 · c p w · ( T s 2 − T 1 ) (A7) α 0 = A 0 A 3 , β 0 = B 0 B 3 , β 1 = B 1 B 3 , a 3 = α 0 , b = α 0 − β 0 β 1

PY - 2011/4

Y1 - 2011/4

N2 - Evaporative gas turbine cycles (EvGT) are of importance to the power generation industry because of the potential of enhanced cycle efficiencies with moderate incremental cost. Humidification of the working fluid to result in evaporative cooling during compression is a key operation in these cycles. Previous simulations of this operation were carried out via numerical integration. The present work is aimed at modeling the wet-compression process with approximate analytical solutions instead. A thermodynamic analysis of the simultaneous heat and mass transfer processes that occur during evaporation is presented. The transient behavior of important variables in wet compression such as droplet diameter, droplet mass, gas and droplet temperature, and evaporation rate is investigated. The effects of system parameters on variables such as droplet evaporation time, compressor outlet temperature and input work are also considered. Results from this work exhibit good agreement with those of previous numerical work.

AB - Evaporative gas turbine cycles (EvGT) are of importance to the power generation industry because of the potential of enhanced cycle efficiencies with moderate incremental cost. Humidification of the working fluid to result in evaporative cooling during compression is a key operation in these cycles. Previous simulations of this operation were carried out via numerical integration. The present work is aimed at modeling the wet-compression process with approximate analytical solutions instead. A thermodynamic analysis of the simultaneous heat and mass transfer processes that occur during evaporation is presented. The transient behavior of important variables in wet compression such as droplet diameter, droplet mass, gas and droplet temperature, and evaporation rate is investigated. The effects of system parameters on variables such as droplet evaporation time, compressor outlet temperature and input work are also considered. Results from this work exhibit good agreement with those of previous numerical work.

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U2 - 10.1016/j.applthermaleng.2010.11.002

DO - 10.1016/j.applthermaleng.2010.11.002

M3 - Article

AN - SCOPUS:79951517650

VL - 31

SP - 834

EP - 840

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

IS - 5

ER -