ARCTIC LNG PLANT DESIGN: TAKING ADVANTAGE OF THE COLD CLIMATE

摘要

As the LNG industry continues to grow, liquefaction plants are being considered in a wider range of climates, including arctic environments. This paper compares arctic conditions to the historic tropical and desert locations, focusing on the key differences of colder year-round ambient and seawater temperatures and wider seasonal temperature ranges. These differences play a significant role in selecting the optimum liquefaction cycle, refrigeration driver type, and machinery configuration. The Propane Precooled Mixed Refrigerant (C3MR) and Dual Mixed Refrigerant (DMR) processes are compared. With the same power input, these processes produce essentially the same LNG flow with essentially the same specific power, except in very specific circumstances. A case study is included to provide more detailed information. Equipment configurations are discussed, including electric motor drive, aeroderivative gas turbines and refrigerant compressor arrangements.