Energy Saving Tips for Businesses
Ensure your air-conditioning doesn’t operate below 24°C. Maintain a temperature gap between your heating and air-conditioning control temperatures to ensure that the two systems are not competing and wasting energy and money. Having ‘free cooling coils’ fitted in the unit can produce savings – these use outside air (when it’s cool enough) to produce cooling.
On average 25% of a company’s electricity costs arise from lighting. Install occupancy sensors in spaces that are not constantly used. If you use fluorescent tubes a change from T12 tubes to T8 tubes can produce energy savings of 10%. Greater savings can be had by upgrading lamps to T5 and retain a high light output.
Installing de-stratification fans in industrial buildings with warm air heaters and high ceilings can reduce energy use by 20%, by blowing warm air down to ground level where it’s needed.
Electronic boiler sequence controllers in multi-boiler installations can increase efficiency and pay for themselves in 1-5 years by ensuring that only the minimum number of boilers is allowed to fire at any time. The thermal efficiency of a heating boiler decreases when it is operating under low thermal load due to the greater contribution of fixed heat losses such as convection losses from the boiler casing; draught losses up the flue when the burner is not firing and purge losses on burner start up and shut down.
Process Heating & Drying:
40% of the energy used in UK industry goes on process heating and drying yet up to 10% of this could be saved through heat recovery techniques using either ‘recuperation’ (using a heat exchanger) or ‘regeneration’ (using a high thermal mass matrix which is successively heated and cooled). Also insulating steam pipe-work (including valves and flanges) and hot–water and hot–oil systems can cut energy costs by up to 5%.
A regularly maintained refrigeration system uses significantly less energy – ensure units are regularly serviced and inspect your compressors according to manufacturer’s instructions. Only cool to the temperature you need – every 1C saved can reduce energy consumption by 2%. Reduce energy wastage in units by using doors or night blinds.
A well-managed building control system can help reduce costs associated with energy, maintenance and repair and replacement. Unfortunately, about 90% of all building control systems are inadequate – which costs industry and commerce over £500 million a year in additional energy costs. Building Energy Management Systems (BEMS) are computer-based systems that automatically monitor and control a range of building services and are beneficial for buildings with changing usage and occupancy patterns. Such systems can deliver energy efficiency improvements of 10-20%, compared with an independent control, and provide energy performance data to support a targeted energy savings programme.