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Home › Forums › Asimptote knowledge forum › DELE in the evaporator (ORC cycle)

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    • April 11, 2025 at 11:43 am #7648
      Abdenour ELIAS
      Participant

      I defined a DELE= 26.24 kW as losses in the evaporator in the ORC Cycle but when I calculated the energy balance, the DELE was not taken into account; I made EEQCOD=1. in the table of energy balance, it shows : Energy loss (enthalpy)=0, Energy loss (HHV)=0, Energy loss (LHV)=0,

    • April 11, 2025 at 4:27 pm #7649
      sreekanth.manavalla
      Participant

      If you used a heat exchanger as an evaporator, here are the conditions which are avaiable in the Help:

      DELE=energy flow to the environment (kW) for EEQCOD = 2 (default = 0.0)

      DELE > 0 is energy flow to the environment, for example radiation loss. This value, which is used in a local energy balance, can be altered in a user subroutine (APSUB).
      DELE should differ by at least EPS from -8888.8

      If you used a Boiler as an evaporator:
      DELE=energy flow released from the boiler (kW) (default = UNKNOWN).

      Radiation losses cannot be specified separately, but may be rediscounted in the thermal efficiency. Specification is only allowed for boilers with 1 inlet and 1 outlet pipe. The value should differ by at least EPS from -8888.8. If DELE is specified, ESTMAS should be specified also.

    • April 14, 2025 at 11:24 am #7670
      Abdenour ELIAS
      Participant

      The problem is resolved; I put EEQCOD=1, so DELE is ignored. In case EEQCOD=2, DELE is included in the calculation. thank you for your response.

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