In order to obtain reasonable accuracy for the models, two low
temperature models were derived covering the heat source inlet
temperature range 80e180 C: one for simple (no recuperation)
ORCs and one for recuperated (whenever advantageous) ORCs, and
similarly, two high temperature models covering the heat source
inlet temperature range 180e360 C.
The models were derived based on a number of random observations
of the model results: for the high temperature cases 100
and for the low temperature cases 85. The lower number is due to
the lower number of parameters in the low temperature models.