How to Cut Fuel, Emissions and Generator Runtime Across Multiple Cranes and Hoists on a Single Construction Site

Dumarey’s Partnership with Sunbelt Rentals UK & Vistry Group and Meridian Water

Dumarey Green Power supplied London Tower Cranes a Revolution Battery to run a tower crane. The battery removed the requirement for a diesel generator which cut costs and emissions.

Clients:

Sunbelt Rentals UK & Vistry Group
Meridian Water

Industries:

Construction

Applications:

Construction Hoists| Tower Cranes

Customer’s benefits

By deploying multiple energy savings solutions across this site, Vistry achieved a weekly commercial saving of £1,691, and a carbon saving of 10,850kg per week.

Customer Requirements

Meridian Water is Enfield Council’s £6 billion, 25-year regeneration project, which will create 10,000 homes, including 4,000 affordable homes, helping to ease the London housing crisis with an emphasis on prioritising housing for local residents and generating thousands of new jobs that all benefit the local economy.

The first phases of Meridian Water will be delivered by a development agreement between the client, Enfield Council and lead contractors, Vistry Partnerships London, now Countryside Partnerships, who are committed to building in a low carbon way and seeking solutions that will minimise the impact on the environment and the surrounding areas.

Results

Based on conservative estimates, the team at Sunbelt have established that without adopting cleaner energy solutions (1-4) the site would have consumed an additional 76,180 litres of fuel in the period between January 1 and March 1, 2023. This would have contributed to over 202,780kg of carbon being emitted into the atmosphere. However, because of the clean energy applications deployed, the site saved 27,536 litres fuel (January 1 and March 1, 2023).

Commercially, this has reduced the fuel spend (during this period) from £112,911.88 to £72,432.78 (based on an average fuel price of £1.47 per litre during this period). Giving a total fuel savings for a 2-month period (January 1 and March 1 2023) of £40,479. After subtracting the hire cost for the addition of clean energy equipment for this period (£29,145) Vistry achieved a weekly commercial saving of £1,691, and a carbon saving of 10,850kg’s per week.

Dumarey Solutions

The clean energy team identified multiple applications across the site that would benefit from the addition of Peak Power Support systems (Punch-Flywheels) and Battery (Energy) Storage Units (BSUs), which across the site could:

  • Reduce generator sizes, fuel consumption, and generator run time
  • Reduce emissions, noise pollution & overall costs
  • Provide clean energy for hoists and tower cranes

At this time, the site had 4 tower cranes and 2 twin passenger and goods hoists. These are all dynamic load applications that traditionally require large generators, often running inefficiently on idle (sometimes 24/7) until the crane or hoist is called into action, requiring a large burst of energy for a short period.

The site adopted multiple clean energy solutions:

  • Clean Energy Solution 1: By adding a peak power support system and BSU, the two 250kVA generators originally powering tower cranes 1 & 2 could be downsized to a single 250kVA. The battery (energy) storage unit was added to power aviation lights overnight, meaning the generator was only turned on when the site was in operation, reducing run time by over 50%.
  • Clean Energy Solution 2: Tower crane 4 had a BSU added to its existing 250kVA generator, reducing generator run time, fuel consumption, and emissions. This allowed the generator to be turned off overnight while the BSU powered the aviation lights.
  • Clean Energy Solution 3: The generator powering tower crane 5 was downsized from 300kVA to 200kVA with the addition of a peak power support system. A BSU was also added to power aviation lights outside working hours, further reducing generator run time, fuel consumption, and emissions.
  • Clean Energy Solution 4: The two double hoists would traditionally require a 500kVA generator, but by adding a peak power support system, the power supply was downsized to a single 250kVA generator set, providing significant fuel and emission reductions.

In addition, Countryside Partnerships (Vistry Group) adopted several other solutions from Sunbelt Rentals that enabled them to lower emissions and monitor environmental impact.

Hybrid Lighting: 10× hybrid lighting towers provide overnight lighting for security purposes and enable continued working during winter months. They typically reduce fuel consumption by over 50% compared with standard fuel-powered models.

Peak Power 200

Flywheel based energy storage systems

Diesel Generator Downsizing

Required size of diesel generators is reduced, cutting fuel consumption

Emissions Reduction

Reduction in fuel consumption cuts CO₂ and other site emissions, helping construction firms meet their obligations

Results

1691

£ net saving per week

-27536

litres of diesel saved in two months

>10

tonnes of CO₂ avoided each week

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How to Cut Fuel, Emissions and Generator Runtime Across Multiple Cranes and Hoists on a Single Construction Site











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