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Theoretical reserves of various ocean energy resources in China including tide, wave, tidal currents, thermal differences, salinity differences and sea currents are roughly estimated. Analysis of these data shows the following general characteristics of ocean energy resources in China. (1) Rich reserves. Total power is approximately 8×108 kW (not including wave energy in the open seas), in which thermal energy is the most, more than 4 ×108 kW. (2) Uneven distribution. Most of the energy of tide, wave, salinity differences and tidal currents are reserved in the coastal area of Zhejiang and Fujian Provinces, and the next is in the eastern Guangdong coast in the South China Sea, which has the most of the thermal energy. (3) Time-dependent variation of these energies. Except that the energies of temperature difference and sea currents are relatively stable, that of tide and tidal currents have obvious short-period changes (day and month), while energy of salinity difference has greater seasonal and annual changes and the wave energy has both radical short-period (in seconds, minutes, and hours) and obvious seasonal changes.
Theoretical reserves of various ocean energy resources in China including tide, wave, tidal currents, thermal differences, salinity differences and sea currents are roughly estimated. Analysis of these data shows the following general characteristics of ocean energy resources in China. (1) Rich Reserves In which thermal energy is the most, more than 4 × 108 kW. (2) Uneven distribution. Most of the energy of tide, wave, salinity differences and tidal currents are reserved in the coastal area of zhejiang and Fujian Provinces, and the next is in the eastern Guangdong coast in the south china sea, which has the most of the thermal energy. (3) Time-dependent variation of these energies. Except that the energies of temperature difference and sea currents are relatively stable, that of tide and tidal currents have obvious short-period changes (day and month), while energy of salinity difference has greater s easonal and annual changes and the wave energy has both radical short-period (in seconds, minutes, and hours) and obvious seasonal changes.