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[TRNSYS-users] Turbine - Type 592

Hi every one,

Simulating power plants I had found some problems within the steam turbine, type 592:
  1. It does not have implemented Stodola's law, to analyse the pressure variation along the turbine as function of the steam mass flow, which changes steam outlet conditions. Thus, this type cannot be use to make any transient analysis at all.
  2. I have tried to simulate the power block presented by A.M.Blanco-Marigorta [1]. The high pressure turbine works well, but the results of the low pressure stage are completely different. I tried to simplify the problem and analysed just one stage: the expansion from:
    1. Tin = 373.4 ºC / Pin = 16.5 bar / Hin = 3196 kJ/kg
    2. Pout = 13.99 bar, which must correspond with Tout = 352 ºC / Hout = 3154.7 kJ/kg. 
But with TRNSYS I got Tout = 239 ºC / Hout = 2897 kJ/kg. Isentropic eff. = 0.85. I checked this with Ebsilon and the results from [1] should be right.
  1. On the other hand, I had found that this turbine, which should works well with 5 extractions/injections, works well up to 4 extraction, but not with 5.

Did anyone find any reason for this problem?

Thanks in advanced

[1] Blanco-Marigorta, A. M., Victoria Sanchez-Henríquez, M., & Peña-Quintana, J. A. (2011). Exergetic comparison of two different cooling technologies for the power cycle of a thermal power plant. Energy, 36(4), 1966-1972. Retrieved from http://www.sciencedirect.com/science/article/pii/S0360544210005128 
-- 
Javier Sanz Bermejo
IMDEA Energía

Phone: +34-917371147
e-mail: javier.sanz@imdea.org
web: http://www.energia.imdea.org

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Change the world; get into "Reduced, Reused and Recycled" Energy Cycle
   1st: Reduce energy consumption
          2nd: Increase energy efficiency
                  3rd: Use renewable energy
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