[TRNSYS-users] Turbine - Type 592

[Javier Sanz]

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.

   3. 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 at imdea.org
web: http://www.energia.imdea.org

-----
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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