Cardiff Council

Cardiff Council
Cardiff Council

Cardiff Council is the governing body for Cardiff, the capital of Wales. The council consists of 75 councillors, 29 electoral wards and occupies over 300 buildings. Sustainable development is a guiding principle for all of the council’s activities. Cardiff today is a three planet city: if everyone in the world consumed natural resources and generated carbon dioxide at the rate we do in Cardiff, we would need three planets to support us. Our aspiration is for Cardiff to be a one planet city by 2050. We’re sharing our data here to show the improvements we’re making to the council’s operations.

Our energy use

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Recent Stories

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Cardiff Council says:

Grangetown Nursery School and the BGS are trialling an exciting new renewable energy project. They've installed a ground source heat pump to remove heat from the water below the city. https://www.youtube.com/watch?v=LHQwdB6HvRc&feature=youtu.be

23rd September 2016
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Cardiff Council says:

Cardiff Council are proud to announce the official opening of a 400KW Hydroelectric Power station at Radyr Weir, Cardiff. As part of the Council's Energy Strategy, this plant will provide a significant income and sustainable energy for many years!

8th August 2016
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Tim from Cardiff Council says:

During the Spring Term, Eco teams from Radyr Primary and Bryn Deri Primary experienced a guided tour of the newly built HydroElectric Power station at Radyr Weir. This was a valuable insight into the future of Renewable electricity generation.

3rd August 2016
See more

Our sustainability targets

We have set ambitious targets for ourselves to cut our carbon emissions by 2018. We aim to reduce our carbon emissions from landfill, operational buildings, streetlighting and fleet operations by 60%. Here you can see our annual emissions, and our targets.

Study our data

Cardiff Council shares its sustainability data so that everybody can help to identify new savings and suggest improvements. The icons below show the utility data currently available for each year.

If you have ideas on how Cardiff Council could use energy more efficiently, please let us know!

2017

  • Oil

  • Heat

  • Water

  • Solar

  • Wind

  • Rain

Download 2017 data

2016

  • Oil

  • Heat

  • Water

  • Solar

  • Wind

  • Rain

Download 2016 data

2015

  • Oil

  • Heat

  • Water

  • Solar

  • Wind

  • Rain

Download 2015 data

2014

  • Oil

  • Heat

  • Water

  • Solar

  • Wind

  • Rain

Download 2014 data

2013

  • Oil

  • Heat

  • Water

  • Solar

  • Wind

  • Rain

Download 2013 data

2012

  • Oil

  • Heat

  • Water

  • Solar

  • Wind

  • Rain

Download 2012 data

Notes about Cardiff Council

Notes about Cardiff Council

How do you calculate the CO2e emissions from a unit of energy used?

Energy retailers and the government produce conversion factors that describe the typical carbon impact of different energy sources. These allow us to take the energy uses (in their respective units), and calculate the approximate carbon dioxide emissions, normally measured in kilograms of carbon dioxide equivalents (kgCO2e). Defra's UK conversion factors may be found at Defra's 2015 Guidelines. .

What do the colours on the graph mean?

For buildings, the colours in the graph show approximately how the current level of usage would lead to a given Operational Rating – as set out on a Display Energy Certificate (DEC) – if the performance for a given moment carried on for an entire year. This goes from dark green for ‘A’ to red for ‘G’. We calibrate this using input data used for generating the building’s DEC, together with information relating to 'normal' buildings of its type. If we do not have data for all of the utilities noted in the DEC then the graph will appear in a light-blue colour scale, to indicate that the usage displayed on the graph is not representative of the full energy use of this building. Graphs for communities also show in this blue colour scale.

How do you get this data from the buildings?

Energy data is delivered to CarbonCulture's server every hour or so by Cardiff Council's own energy data system. This, in turn picks up energy data from the various meters located at Cardiff Council's buildings.

Why are you using these units and what do they mean?

We provide three different measures of the energy used: the amount of energy, its monetary cost, and the carbon impact of the energy used. Energy use is measured in kilowatt hours (kWh), which are the standard units of a home energy bill (1kWh is the amount of electricity used by ten 100W light bulbs in one hour). For electricity this number represents the amount of energy that flows into a building through the meter, and excludes distribution losses. For gas it is the amount of energy that is theoretically available by burning all the gas in an imaginary ideal burner. For district heating it reflects a flow of temperature into the building over time (after the heat produced by burning the fuel has been transported to the meter, which involves other losses). So each of these numbers, while all being measured in kWh, mean very different things. This is one reason that we prefer to use 'units per hour' when combining them. In some ways it would be more correct not to combine them at all, because combining them implies that the measures are comparable. This is a global challenge though, and conventions have become established around combining kWh. So we'll have to fix that another day. Monetary cost is calculated using the costs per 'unit' for each utility in every building. The figures used are noted below in the Notes section. The carbon impact is measured in kg of CO2e (the e stands for equivalent) which takes other climate-affecting gasses into account in addition to carbon dioxide.

Why isn't the graph updating?

Occasionally the data connection goes down and the graph isn't automatically updated with the current information. This is nothing to worry about. During these periods, all of the data is saved and we will fill in the graphs with the backdated information as soon as possible.

Header photo by Alex Holyoake / CC BY 2.0