In a bid to meet the International Maritime Organization’s tightening carbon emission regulations, researchers have been ramping up efforts to boost ship energy efficiency. A recent study, published in the Journal of Marine Science and Engineering, offers a promising solution that combines wind-assisted propulsion and waste heat recovery systems. The research, led by Shibo Zhao from Newcastle University’s Marine, Offshore and Subsea Technology Group, presents a comprehensive energy-saving approach for ocean-going cargo ships.
Zhao and his team integrated a wind-assisted propulsion system (WAPS) with an organic Rankine cycle (ORC) waste heat power generation system. The organic Rankine cycle is a bit of a mouthful, but it’s essentially a way to turn waste heat from a ship’s engines into useful energy. By simulating a typical cargo ship’s energy efficiency, the researchers determined the optimal system configuration and working fluids to minimize fuel consumption.
The results were impressive. The combination of WAPS and ORC achieved the highest energy efficiency, with fuel savings of up to 21%. “The simultaneous use of these two energy-saving technologies can achieve the highest energy efficiency,” Zhao stated, highlighting the potential of this integrated approach.
For the maritime industry, this research opens up significant commercial opportunities. Shipowners and operators are constantly seeking ways to cut fuel costs and reduce emissions. This integrated system offers a practical solution that can be retrofitted to existing vessels or incorporated into new builds. Moreover, as global regulations continue to tighten, ships equipped with such energy-saving technologies will be better positioned to comply with future standards.
The study also provides a valuable theoretical basis for the design of ship energy-saving systems. By understanding the optimal configuration and working fluids, shipbuilders and engineers can develop more efficient and environmentally friendly vessels. This not only benefits the environment but also enhances the competitiveness of the shipping industry.
In the quest for greener and more efficient shipping, Zhao’s research offers a promising path forward. As the maritime industry continues to innovate, such integrated energy-saving solutions could become a standard feature in the global fleet. The study, published in the Journal of Marine Science and Engineering, serves as a testament to the ongoing efforts to make shipping more sustainable and cost-effective.