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Re: [TRNSYS-users] hybrid small scale CHP plant combining geothermal with solar thermal (PTCs) power



Alexandros,
  Type1288 is appropriate for applications in which the working fluid's thermal properties change with temperature. The other two models (Types 1257 and 536) assume constant properties over the working temperature range. The Type1257 model is designed around a few particular test procedures used to characterize the performance of parabolic concentrators. You should use that model if you have the parameter data that it requires.

  As far as an ORC engine component is concerned, we have usually modeled these quite simply using a generic performance map component such as Type42. You'll define the engine's COP as a function of a few variables of interest (low and high temperature sinks for example) and then enter this performance data into an external file to be read by Type42 during the simulation.

  I need a little more information in order to make a recommendation about the geothermal source. Are you talking about using the ground as thermal storage or using it as an actual source of energy (like a very very deep mine or heat exchanger)
Kind regards,
 David



On 12/9/2014 12:51, ALEXANDROS PECHTELIDIS wrote:
Hello,

I am new in TRNSYS, so I would like a little help in choosing the right components for the above simulation model.

Can you suggest any specific parabolic trough model component among types 1257, 536 and 1288 given the fact that our goal is to achieve a thermal output power equal to approximately 200kW (really small scale)

Considering the geothermal source... I couldn't find any relative component type!

Neither for the electric power generator which I have to apply an Organic Rankine Cycle (ORC) engine. I am aware that I have to add such a component and modify it afterwards. Is it possible to find an existing code the ORC generator, or can you give me any tip on how to make the modifications in the new component?

Thanks in Advance.

Kind Regards
Pechtelidis Alexandros



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