Royal Mail

Royal Mail reduces energy consumption & CO2 by 17%

Royal Mail has over 3,000 buildings across the UK, collecting items from 113,000 post boxes, 14,300 Post Offices and some 87,000 businesses. Over 30,000 vehicles deliver the items to their final destination. Royal Mail conducted a pilot of Sabien’s M2G technology at their Cardiff Mail Centre.

Sabien Technology focuses on helping both Private and Public organisations reduce their carbon emissions, energy consumption by up to 35%.

Sabien and M2G delivered

During the pilot, energy consumption and carbon emissions were reduced by 17%. Payback was in 20 weeks with annual carbon savings of 28 tonnes.

Pilot Methodology

The test conditions and methodology were agreed with Royal Mail. The pilot site was chosen by the client. The pilot was conducted over a period of 30 days.

M2G can be configured to operate in either ‘Save’ (i.e. days when the M2G is operational and makes savings) and ‘Bypass’ (i.e. days when the M2G is bypassed and makes no savings) mode. A comparison of the boiler firing periods was made between Save and Bypass days.

Variations in outside temperature were accommodated using industry standard degree day calculations. Ambient room and hot water temperatures were unaffected during the pilot period.

Sabien managed the pilot from start to finish, working closely with onsite engineers and third party stake holders.

What is M2G?

The M2G is an intelligent boiler load optimisation controller that improves the efficiency of each individual boiler. A unit, which can be retro-fitted to each boiler, monitors the temperature of the water in the flow and return every 10 seconds and the information is recorded with heat transfer rates at the first and second stage firings.

When a loading demand is made, the system automatically checks the latest data it has stored and decides whether it is more economical to retain first stage firing or to introduce a second stage firing. The result can be a substantial fuel reduction during less demanding situations while ensuring maximum capacity during heavy load periods.

Integrates with Building Management Systems

The M2G integrated seamlessly with the existing Building Management System. The majority of M2G installations are in buildings which have sophisticated Building Management Systems already in place.