EFFECT OF FEED CONDITIONS ON THE PERFORMANCE OF DOUBLE STAGE MIXED REFRIGERANT LNG SYSTEM

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KARAMLOO BEHNAM; KHANAKI MANSOUR; MAFI MOSTAFA; SADATSAKKAK SEYEDABBAS

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Journal: Modares Mechanical Engineering Year:2017 | Volume:16 | Issue:10 Page(s): 103-114

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Title

EFFECT OF FEED CONDITIONS ON THE PERFORMANCE OF DOUBLE STAGE MIXED REFRIGERANT LNG SYSTEM

Author(s)

KARAMLOO BEHNAM | KHANAKI MANSOUR | MAFI MOSTAFA | SADATSAKKAK SEYEDABBAS | Issue Writer Certificate

Keywords

NATURAL GAS LIQUEFACTIONQ1

DUAL MIXED REFRIGERANT PROCESSQ1

ENVIRONMENTAL CONDITIONSQ1

COMPOSITE CURVEQ1

Abstract

In this study, the double stage mixed refrigerant LNG system is investigated, which is known for having the highest efficiency among the liquefaction cycles. The main purpose is to evaluate the performance of double stage mixed refrigerant LNG system due to variations on the environmental and operating conditions of feed. Temperature, pressure and feed gas compositions are considered as variable ENVIRONMENTAL CONDITIONS during liquefaction processes. A basic system has been chosed to view the response of the DMR liquefaction system to these changes. Results show that with decreasing temperature and increasing pressure of feed natural gas, specific shaft work decreases. Moreover, since in this case, minimum approach temperature in heat exchangers are reduced only slightly from allowed value (3oC). Therefore this adventage can be used with accepting a slightly lower safety factor than the optimal case. Increasing temperature and decreasing pressure of feed natural gas cause increasing the specific shaft work as well as temperature cross occurance in heat exchangers and therefore these areas should be prevented using control strategies. Also, any changes in mole fraction of natural gas components make temperature cross in heat exchangers. Finally, due to the change of the natural gas components mole percentage, during the life of the well, the refrigerant composition in the cycle should be optimized regarding the new conditions.

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APA: Copy

KARAMLOO, BEHNAM, KHANAKI, MANSOUR, MAFI, MOSTAFA, & SADATSAKKAK, SEYEDABBAS. (2017). EFFECT OF FEED CONDITIONS ON THE PERFORMANCE OF DOUBLE STAGE MIXED REFRIGERANT LNG SYSTEM. MODARES MECHANICAL ENGINEERING, 16(10 ), 103-114. SID. https://sid.ir/paper/178264/en

Vancouver: Copy

KARAMLOO BEHNAM, KHANAKI MANSOUR, MAFI MOSTAFA, SADATSAKKAK SEYEDABBAS. EFFECT OF FEED CONDITIONS ON THE PERFORMANCE OF DOUBLE STAGE MIXED REFRIGERANT LNG SYSTEM. MODARES MECHANICAL ENGINEERING[Internet]. 2017;16(10 ):103-114. Available from: https://sid.ir/paper/178264/en

IEEE: Copy

BEHNAM KARAMLOO, MANSOUR KHANAKI, MOSTAFA MAFI, and SEYEDABBAS SADATSAKKAK, “EFFECT OF FEED CONDITIONS ON THE PERFORMANCE OF DOUBLE STAGE MIXED REFRIGERANT LNG SYSTEM,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 10 , pp. 103–114, 2017, [Online]. Available: https://sid.ir/paper/178264/en

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