Using battery storage for tower crane applications: shipping and construction
The struggles of tower cranes
Tower cranes are among the most energy-intensive machines on a construction site, dock or shipyard. Their significant power demand often means they are too powerful to connect directly to the grid. As a result, contractors typically rely on diesel generators to power them. However, operating tower cranes with large diesel generators can be inefficient, result in high emissions, and lead to substantial fuel costs.
The benefits of Battery Energy Storage Systems (BESS)
Short bursts of high power for lifting are required during the operation of tower cranes. During the rest of the time, diesel generators often sit idle or operate underloaded, which is inefficient and can be harmful to equipment. Integrating a Battery Energy Storage System (BESS) with a generator allows for a more optimised power solution. The BESS can support the generator during periods of high demand, enabling the generator to be downsized to cover the base load efficiently.
A battery can be a reliable and more sustainable energy source for powering tower cranes. This setup allows the generator to run more efficiently, reducing fuel consumption and emissions. Additionally, a BESS can be used to handle overnight operations, such as powering aviation lights or sign boards, further reducing the need for continuous generator use.
BESS as a standalone solution
In scenarios where the site has a limited mains connection that is insufficient to power the crane, a BESS can serve as a standalone solution. By ‘peak shaving’ the grid connection, the BESS can provide additional power when the mains supply reaches its limit and recharge during periods of low demand. This approach not only overcomes capacity constraints but also optimises energy usage, ensuring that the crane operates smoothly without the need for oversized or continuously running generators.
Key sectors
- Construction (BS&C): Tower cranes are common on construction sites that often have limited or no mains supply.
- Shipping: Dockyards and cargo operations require high-power cranes.
Benefits of BESS in tower crane solutions
- Reduce emissions: by decreasing the reliance on diesel generators, emissions can be significantly reduced.
- Lower fuel consumption: optimised energy usage leads to lower fuel consumption and therefore reduced carbon footprint.
- Reduce fuel costs: lower fuel consumption translates to cost savings.
- Downsize/rightsize generators: smaller generators can be used reducing emissions and fuel consumption.
- Overcome capacity constraints: BESS can supplement limited mains supply or support generators.