Details of Harlingen Plume Plotter

This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Harlingen version of Plume Plotter.

Stacks and buildings

Building measurements are taken from drawings in the planning application [1] and from aerial photos. This image shows the layout of the stack and building modelled. North is at the top; colours and numbers indicate the height of the building and the stack:

Stack measurements

These are taken from [1]:

• Stack location: 53.191417,5.427229.
• Stack height: 44 m.
• Stack diameter: 2.5 m.
• Stack gas exit velocity: 17 m/s.
• Stack gas temperature: 130 °C.

The following values are used for albedo, Bowen ratio and roughness length. Roughness length is as specified in [1]:

• Albedo: 0.2.
• Bowen ratio: 1.
• Roughness length: 0.077.

Emissions

The emission rates of pollutants are of two types. Both are calculated by multiplying the flow rate by the emission concentration.

For the planned emission rates, the concentrations used are the limits stated in [1]. Resulting (mass per second) emission rates are listed below:

The actual emission rates are calculated from the annual average concentrations and flow rate for 2015, as reported in [2]. They are listed below:

Background levels

The background levels of pollutants are taken from [1]. These are:

Weather data

Weather data is taken from METAR reports from a local airport: Leeuwarden.

Upper air data is the latest reported by the Nordeney upper air station.

References

1. LUCHTKWALITEITONDERZOEK RESTSTOFFEN ENERGIE CENTRALE HARLINGEN. AFVALSTURING FRIESLAND N.V. April 2010.

2. MER-evaluatie REC Harlingen: Gegevensinventarisatie en -evaluatie. LievenseCSO. June 2017.