Skip to main content

eCalc

New Features

  • Added chart area flag NO_FLOW_RATE to the possible statuses for an operational point in a variable speed compressor chart. The chart area flags can currently only be found in the json result file, but we will also try to find a way of displaying this information in the WebApp as well.
  • Whenever there is a variable speed compressor only recirculation fluid (can happen in a multiple streams and pressures compressor train) a warning will be logged.
  • Add rate type to more equipment in results

Fixes

  • nmvoc emissions were incorrectly reported for the ltp categories HEATER and BOILER: The emission query filters included nox, and are now corrected to nmvoc.
  • Instead of applying the surge control margin to the average of the minimum flow rate for all speed curves in the compressor chart, a more robust calculation is implemented for variable speed compressors: The updated minimum flow is calculated individually for each speed, using the control margin as the increase in minimum flow, in percentage or fraction of the rate difference between minimum- and maximum flow, for the given speed. This solves the problem of eCalc failing when the new calculated minimum rate was outside the compressor chart for a given speed.
  • Improved error messages
  • Other fixes

Breaking changes

None