The form, principle, utilization status and development trend of ocean energy.

With the growth of global energy demand and the pressure of environmental protection, ocean energy has received widespread attention as a clean and sustainable form of energy. The purpose of this paper is to analyze various forms of ocean energy, explore its working principles, power generation technologies and application potential, and evaluate its research progress on a global scale. This paper details the working principle and power generation technology of ocean current, tidal, wave, temperature difference and salt difference energy. Especially in terms of salt differential energy, this paper analyzes the key role of permeable membrane technology and the large-scale production of low-cost special membranes. The analysis shows that countries have made significant progress in research in the field of ocean energy, especially in ocean current energy and tidal energy. China has also made breakthroughs in ocean current, wave and temperature difference energy. In short, ocean energy has great potential for development as a clean and sustainable energy source. Future development trends will focus on improving power generation efficiency, reducing costs, and reducing ecological environmental impact. As technology advances and costs fall, ocean energy is expected to occupy a more important position in the global energy system. [ABSTRACT FROM AUTHOR]