Abstract:
This study presents a development of guideline
for smokestack design of standalone emergency generators to
satisfy the emission standards. Standalone generators of 10 kW
to 1 MW range were considered for the study. Governing
parameters for dispersion of the plume and effect of stack design
parameters were studied. The backpressure effect of the stack
design was analysed to establish its effect on the generator
efficiency, and it was modelled by adopting ASME standards.
Dispersion of the plume was modelled using Lakeview
AERMOD software and the simulation results were validated
using measured data in Colombo Fort region. The effect of the
fuel type, emission source location and weather conditions were
analysed using dispersion simulations. Influence of the
considered weather data is valid for 2 km radius from the
measured point. The ground level concentration of SO2 with
stack height and the diameter was plotted and it was used in
determining the stack design parameters considering
surrounding conditions. A set of design curves were developed
by combining the dispersion simulations and backpressure
calculations to design the smokestack height and diameter for
stand-alone generators. The developed curves can be used to
design the smokestack height and diameter for standalone
generators of 10 kW to 1 MW.
