Function of cascade compressors and power consumption optimization in ammonia liquefaction process: a system evaluation with a 6 sigma approach

Ammonia is stored as a liquefied raw material as it is used in the fertilizer and cooling industries. The use of multistage compressors during storage is essential, as the boiling point is very low (-33°C) due to a typical petroleum derivative. Because pressure-temperature optimization with a typical single-stage compressor does not allow ammonia to be stored under atmospheric conditions. The use of condenser and throttling valves used in cooling systems together with multi-stage compressors for storage in atmospheric conditions allows ammonia to be stored in liquid form during storage. In this study, a method has been developed to optimize the energy consumption by calculating the power consumption for the pressure and temperature conditions determined for the liquefaction of anhydrous ammonia, to improve the liquefaction conditions and to minimize the energy consumption.

Keywords:

Ammonia, multi-stage compressor, power consumption consumption optimization, compressor liquefaction capacity,

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[1] Horlock, J. H., ASME, J. Basic Eng., 1971, 93, 587-593. [2] Galvas, M. R., Analytical Correlation of Multi-stage Compressor Design Geometry for Maximum Efficiency with Specific Speed, NASA TN D, 1972;pp. 39-59.
[3] Whitfield, A.; Baines, N. C. A. Int. J. Mech. Sci., 1976, 18, 179-184.
[4] Toyoma, K.; Runstadler, P. W.; Dean, R. C. J. Fluids Eng.,1977,1, 115-131.
[5] Baines, N. C. ; Wallace F. J., J. Eng. Gas Turbines Power, 1979, 101, 440-448
[6] Koçak, S., Preliminary Design of Centrifugal Compressors. ASME, Energy Week, Engineering Technology, Houston, 1996, p308-313.
[7] Rodgers, C., A Diffusion Factor Correlation for Multi-stage Impeller Stalling. ASME paper 78- GT-61, 1978.
[8] Whitfield, A. ;Baines, N. C., Design of Radial Turbomachines, New York, Longman Scientific Technical, 1990.
[9] Koçak, S., J. Eng. Sci., 2001, 10, 259-265.
[10] Aksel, M. H. ; Eralp, O. C., Gas Dynamics, New York, Prentice Hall, 1994. [11] Öztürk, E., Aerothermodynamics of Turbine Engines and Mechanics, Istanbul, Birsen Yayınevi, 1997. [12] Brauembussche, R. A. NATO ASI Series E, 1990, 97, 829-885.
[13] Koçak, S., J. Technol., 2001, 4 , 119-125
[14]Debyendu C., j. Instrum. Innov. Sci., 2014, 4, pp 1-6