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Technical and Economical Feasibility Study of Applying Heat Pump Systems to Provide Utilities for Oil & Gas Industries

Hamidzadeh, Zeinab | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43358 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Sattari, Sorena; Amidpour, Majid
  7. Abstract:
  8. Distillation is the most applied unit in the separation processess of the oil and gas industries. Because the distillation process requires energy in the form of the utilities, integration of heat pump systems in the distillation process as an application of these systems is considered in this research. A new and effective methodology of proper integrating of heat pump and distillation columns has been proposed by collecting thermodynamic and thermoeconomic tools. Then, this procedure has been applied on the ethane recovery and NGL fractionation units of 4 & 5 phases of the south pars field. The exergy analysis of the distillation columns is the first step of this methodology as the pre-requisite of the thermoeconomic analysis. As the next step, the economic model has been developed on the basis of TRR model. The results of thermoeconomic analysis identifies the de-propanizer column for integrating heat pump into it. After retrofitting of this selected column by VRHP, BFHP and AHP through Aspen Plus 2006 simulator, the most appropriate heat pump is selected with the approach of improving exergy loss profile and column grand composite curve. The absorption heat pump cycle, considerably increases the exergetic efficiency of the distillation column. This system is in the feasible region of cofficient of performance (COP) and payback time of excess capital (PBTE) which are the conventional criterias for assessment of heat pump systems.
  9. Keywords:
  10. Process Simulation ; Exergy Analysis ; Thermoeconomic Analysis ; Mechanical Heat Pump ; Distillation Column Retrofitting ; Heat Pump Integration

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