A steam generation and reaheater model using lumped balance
equations for mass and energy and two spray attemperators
This steam generator is based on lumped balance equations for
mass and energy (for each of live steam generation and reheat one
set) and on transfer functions and characteristic maps for heat
release and pressure losses. The aim of this model is to capture
the boiler's main dynamics without allowing deep insight into the
process. Thus, the model merges the evaporation and superheat and
place the spray injectors (one for each of the live steam
generation and the reheater) at the very end of the boiler. This
simplification does not allow detailed investigations of the
control of steam temperature and feedwater mass flow (applying an
enthalpy correction).
Usage advices:
- The default parameter set do not refer to any real plant
- The injector spray is mixed right befor the livesteam connector
and the reheat_out connector, respectively
- The spray attemperators are ideal, i.e. have no storage
behavior
- The last superheater bundles are placed before the spray
injector
- The pressure loss between live steam and HPInjector is 15 % of
the HP pressure loss (p_FW - p_LS)
- The pressure loss between hot reheated steam and IPInjector is
50 % of the IP pressure loss (p_cRH - p_hRH)
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