Abstract
Small liquid natural gas (LNG) distribution stations require compact, highly efficient cryocoolers to condense boil-off gas in the LNG tank. This paper reports a pulse tube cryocooler measuring 420*690*780mm and weighing 180kg. Using low input electric power, the relative Carnot efficiency was greater than 20%. Increasing the power to 11kW, the cryocooler produced approximately 1.2kW of cooling at 120K. Approximately 293 normal cubic meters of boil-off NG per day can be condensed. If heat transfer in the main heat exchanger was improved, cooling power and efficiency could be improved. It presents a new efficient, compact and reliable configuration for the energy saving in LNG distribution stations.
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