Sensitivity Analysis of Dual Mixed Refrigerant Cycle for low temperature Processes

Mohammad Rahmanian¹ Ramin Naderi Shah Abadi² Fatemeh Tizro³ Raheleh Sadraei⁴ Fatemeh Narimani⁵

1) Lamerd University of Science and Technology Email:
2) Lamerd University of Science and Technology
3) Lamerd University of Science and Technology
4) Lamerd University of Science and Technology
5) Lamerd University of Science and Technology

محل انتشار : کنگره بین المللی علوم مهندسی و توسعه شهری پایدار - کپنهاگ(dtuconf.eu)
Abstract :
Sensitivity analysis can be used to identify important model parameters, in particular, normalized sensitivity coefficients; by allowing a one-on-one comparison. In this paper, important parameters of two optimal conditions of the Dual Mixed Refrigerant (DMR) cycles were identified by sensitivity analysis. For these conditions, the normalized sensitivity coefficient values indicated that power consumption of the cycle is more sensitive to the temperatures before compressors, discharge pressures of compressors and components of precooling refrigerant in comparison with the temperature between the precooling cycle s heat exchangers, suction pressure of compressors and high boiling components of main refrigerant, respectively. It was also seen that the Hwang s DMR cycle is less sensitive cycle than Venkatarathnam s as 9.5%. It might be due to not considering the liquid entering to compressor condition in the latter conditions.
Keywords : LNG, Mixed refrigerant, DMR cycle, Sensitivity Analysis, NSC