Division BAT 19 In order to use energy efficiently, BAT is to use techniques (a) and (b) and an appropriate combination of the techniques (c) to (h) given below.

The drawing up once every year of an energy balance record which provides a breakdown of the energy consumption and generation (including energy export) by the type of source (e.g. electricity, fossil fuels, renewable energy, imported heat and/or cooling). This includes:

1. (i)

   defining the energy boundary of the STS activity;

2. (ii)

   information on energy consumption in terms of delivered energy;

3. (iii)

   information on energy exported from the plant;

4. (iv)

   energy flow information (e.g. Sankey diagrams or energy balances) showing how the energy is used throughout the process.

The energy balance record is adapted to the specificities of the plant in terms of process(es) carried out, materials, etc.

This may be achieved for example by:

• using double-skinned tanks;

• using pre-insulated tanks;

• applying insulation to combustion equipment, steam pipes and pipes containing cooled or heated liquids.