Details of Davyhulme Plume Plotter

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

Stack measurements

All of these are taken from [1] (after correcting the stack location):

Stack location: 53.466554,-2.3736817.
Stack height: 44.23 m.
Stack diameter: 1.8 m.
Stack gas exit velocity: 17.89 m/s.
Stack gas temperature: 140 °C.

The following values are used for albedo, Bowen ratio, and roughness length, the last of which is specified in [1]:

Albedo: 0.2.
Bowen ratio: 1.
Roughness length: 0.3.

Emissions

The emission rates of pollutants are taken from [1] (after correcting many of them). These are:

Pollutant	Emission rate per second
Oxides of nitrogen	5.118 g
Sulphur dioxide	2.047 g
Carbon monoxide	2.047 g
Particulates PM10	409 mg
Hydrogen chloride	409 mg
Hydrogen flouride	40.9 mg
TOC	409 mg
Ammonia	409 mg
Mercury	2.047 mg
Cadmium and thallium	2.047 mg
Other metals	20.47 mg
BaP	4.299 μg
Dioxins and furans	4.094 ng
PCBs	205 μg

Background levels

The background levels of pollutants are taken from [1] except oxides of nitrogen, which is supplied by Peter Bagnall (Breathe Clean Air Group) and is for nitrogen dioxide only. These are:

Pollutant	Background concentration per m³
Oxides of nitrogen	41.2 μg
Sulphur dioxide	9.2 μg
Carbon monoxide	545 μg
Particulates PM10	20.2 μg
Hydrogen chloride	490 ng
Hydrogen flouride	2.35 μg
TOC	N/A
Ammonia	1.6 μg
Mercury	2.18 ng
Cadmium and thallium	140 pg
Other metals	25.85 ng
BaP	400 pg
Dioxins and furans	14.21 fg
PCBs	185.3 pg

Weather data

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

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

References

1. BARTON RENEWABLE ENERGY PLANT AIR QUALITY ASSESSMENT, Fichtner, 2015.