Universiti Teknologi Malaysia Institutional Repository

Targeting the minimum power requirement in a large scale chemical complex

Mat Nawi, Zalina and Abdul Manan, Zainuddin (2004) Targeting the minimum power requirement in a large scale chemical complex. In: 18th Symposium of Malaysian Chemical Engineers (SOMChe) 2004, 13 - 14 Dec. 2004, UTP, Perak, Malaysia.



Power generation (power source) and power consumption (power sink) are inherent for a chemical process which involves a wide range of temperatures and pressures, particularly for processes involving operations from sub-ambient above ambient conditions. A classic example of such process is ethylene complex. In this studies, a combination between pinch and exergy analysis were applied. Pinch analysis is an established systematic tool for the optimal design and retrofit of energy recovery systems. Unfortunately, one of the main limitations of pinch analysis technique in optimising the energy recovery systems is that it can only deal with heat transfer processes, not processes involving power utilisation. On the other hand, exergy analysis guidance cannot indicate clearly the maximum power recovery potential and the minimum utility power. Hence, a systematic technique which can target the maximum power generation and minimum power consumption is essential. In this paper, the first step towards a systematic utilisation of power resources in such process is to target the minimum power It consumption by taking into account the power generation and power demand capacities. The new developed graphical tool named as Power Composite Curves (PCCs) is used for targeting the minimum power consumption in such process. An ethylene complex is selected as a case study to illustrate the strength of the new developed technique. By using the Power Composite Curves, it allows an engineer to visualise the overall potential to maximise the power generation from a series of turbines and power consumption, and hence, the maximum power recovery and minimum power consumption from the national grid can be targeted. From the results of the potential of power savings is 4.06x10(5) kW and the minimum utility power requirement is 3.12x10(5) kW.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Composite curves, economic analysis, Exergy analysis, Pinch analysis, power composite curves, power grand
Subjects:T Technology > T Technology (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:5958
Deposited By: Norhani Jusoh
Deposited On:29 Jul 2008 06:19
Last Modified:01 Jun 2010 15:37

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