Island utilizing cold energy supply system

The present invention relates to a cold energy supply system using the island, comprising: means LNG power generation system, renewable energy generation and storage unit, the low-temperature multi-effect distillation system, a LNG-based generators and wind power, solar energy, joint unstable island wave energy renewable energy generation and storage system composed of energy supply systems, desalination systems waste heat as a heat source unit. In the storage process, the storage of LNG gasification into regenerator via high pressure natural gas NG, NG tank into the pipeline system and stored for future use; secondly, through the cold air is compressed between the regenerator and recover the cold energy stored liquefied throttled. In the process of electricity, high pressure natural gas NG endothermic After warming turboexpander into the work, the small gas turbine combustor with the compressed air into the combustion gas turbine to drive the turbine work; liquid air passes into the regenerator and gradually warmed endothermic turboexpander work. This system allows the simultaneous energizing power and fresh water supplied to the island, and unstable renewable energy into stable controllable power output, system efficiency gains realized and reduce electricity costs, compared to traditional energy systems Island It has a great advantage.