The invention discloses a
simulation calculation model for the heat exchange performance of a
straight tube type once-through steam generator and an
algorithm thereof. According to the
simulation calculation model, a one-dimensional homogeneous flow mathematic model of the once-through steam generator based on
heat transfer partition is established, a
secondary side heat exchange process is divided by adopting appropriate distinguishing conditions, a once-through steam generator heat exchange
simulation program based on
MATLAB (matrix laboratory)
software is developed independently on the basis of the simulation calculation model, and the simulation for the
steady state heat exchange performance of the once-through steam generator under different working conditions is carried out. The
programming difficulty is simplified and reduced, automatic judgment and piecewise calculation can be realized, the range and position of wall temperature uprise and the lengths of heat exchange tubes in all
heat transfer areas under different working conditions are accurately predicted, and thus a serious working area of the once-through steam generator is obtained. Theoretical support can be provided for preventing the accidents, such as overtemperature tube burst, of the once-through steam generator.