Making Cold Seawater for LNG Hybrid Fishing Boats on the Rankine Cycle Utilizing Cold Energy of LNG

Abstract

liquefied natural gas is a clean energy, and also contains a large amount of cold energy, our country has put forward to promote the use of LNG as power fuel, at present, refrigeration device was installed on the trawler; But the energy consumption of the refrigeration unit accounts for 30%~40% of the total energy consumption of the fishing fleet. Considering the existing equipment with 80% natural gas replacement of fuel oil for the practical one fishing boats. A new type plant of cold energy utilization method, which can produce both cold water and electricity, is put forward. The results of the system analysis show that the fuel cost is 610,000 yuan per year and the cold seawater 36.2 tons is produced and annual operation cost of RMB 365,000 is savings. All results show that the hybrid fishing boats rational utilization of LNG cold energy can be significant energy saving.