Energy and Exergy Analysis of FCCU Pre-Heating Unit of KRPC, Nigeria Conference Presentation At The 3 rd INTERNATIONAL DOWNSTREAM CONFERENCE/EXHIBITION.

Energy and Exergy Analysis of FCCU Pre-Heating Unit of KRPC, Nigeria

Conference PresentationAt The

3rd INTERNATIONAL DOWNSTREAM CONFERENCE/EXHIBITION ON PETROLEUM REFINING, PETROCHEMICALS & FERTILIZERS, PORT HARCOURT 2014

August 27-28, 2014

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Presentation Outline Introduction Literature Review Experimental Analysis Process Description Results and Discussion Conclusion and

Recommendation Reference

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INTRODUCTION

Why exergy and energy analysis?Due to the relatively high energy cost as a component of a unit production cost, it is necessary for any plant to carry out analysis of energy utilization. Exergy analysis is a methodology for the evaluation of the

performance of devices and processes, this involves examining the exergy at different points in a series of energy-conversion steps. With this efficiencies can be evaluated, and the process steps having the largest losses can be identified (Rosen, 2004).

kk.

Ideal Work Exergy Destruction/Loss

Second Law Efficiency

3Figure 1. Major components of exergy and energy analysis

Component of Exergy

SCOPE OF STUDY

To analyze FCCU Pre-Heating Unit of Kaduna Refining and Petrochemical Company (KRPC) through energy and exergy perspective.

Sites of primary energy loss and exergy destruction will be determined.

The second law and exergy efficiencies will also be determined.

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LITERATURE SURVEY

Kaduna Refining and Petrochemical Company (KRPC) It was design and constructed by a Japanese Chemical

Engineering Company (CHIYODA) It was commissioned in 1980 as NNPC Refinery Kaduna,

with an initial capacity of 100,000 barrels per stream day [BPSD].

The Refinery was designed to process both Nigerian and imported crude oils into fuels and lubes products.

The purpose of FCCU Pre-heating Unit is to preheat the feed before entering the catalytic reactor.

The most widely used cracking units are the catalytic type with a moving catalyst bed of Zeolite – Y as this gives a higher conversion and selectivity.

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EXPERIMENTAL ANALYSIS

The system ideal work is given by;

= (2)

= (3)

The second law system efficiency for work producing system is given by;

The exergy efficiency of the system is given by;

=

= m [ - (7)

The specific exergy is given by;

Ψ = h -

Then the total exergy rate associated with fluid stream becomes;

χ = m Ψ = m [h - (9)6

PROCESS DESCRIPTION

Figure 2: Preheating section of FCCU in KRPC

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16D15

16P01A

16P01B

16E02

16E03

16E04

16E05

16H02

RESULT AND DISCUSSION

8Figure 3: Second law efficiency

RESULT AND DISCUSSION

9Figure 4: Exergy efficiency

CONCLUSIONS

The exergy and energy analysis of FCCU Pre-Heating Unit was done successfully.

The exergy destruction (loss work) was found to be high in Heat Exchanger 16E-02.

The calculated second law and exergy efficiencies of the system were 43.61 and 56.99% respectively.

REFERENCES

J. Szargut, D.R. Morris, F.R. Steward, Exergy Analysis of Thermal, Chemical, and Metallurgical Processes, Hemisphere, New

York, 1988. M. Kopac, A. Hilalci, Effect of ambient temperature on the

efficiency of the regenerative and reheat Catalag˘zı power plant in Turkey, Applied Thermal Engineering 27 (2007) 1377–1385.

M. Rosen, I. Dincer, Effect of varying dead-state properties on energy and exergy analyses of thermal systems, International

Journal of Thermal Sciences 43 (2004) 121–133. Nigerian National Petroleum Corporation (2004), FCCU Refresher

Course Programme, 2004. Z. Utlu, A. Hepbasli, A review on analyzing and evaluating the

energy utilization efficiency of countries, Renewable and Sustainable Energy Reviews 11 (2007) 1–29.

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