Economical and environmental impacts of heavy coked gas oil in fossil fuel steam power plants : Khartoum North Power Station as case study

Other Title(s)

الأثار الاقتصادية و البيئية لوقود الديزل الثقيل في المحطات البخارية التي تعمل بالوقود الاحفورية : دراسة حالة لمحطة الشهيد د. محمود شريف الحرارية

Dissertant

Ahmad, al-Hajj Abakir Ibrahim

Thesis advisor

al-Amin, Abd al-Munim Muhammad

University

Omdurman Islamic University

Faculty

Faculty of Engineering

Department

Department of Mechanical Engineering

University Country

Sudan

Degree

Master

Degree Date

2009

English Abstract

This research aimed to study the economical and environmental impacts of heavycoked gas oil (HCGO) which is used recently in phase one boilers of Khartoum North Power Station (KNPS).The data of different laboratories reports on fuelsused and the conditions of the steam system operating during the test of HCGO were collected and some samples of HCGO were analyzed in KNPS. The comparisons between HCGO specification and the boiler parameters withheavy fuel oil (HFO) were given in tabular form.

Model for steam system, whichwas used to produce steam for electricity generation was proposed in this research. The thermodynamics and economics analysis for the proposed model were made byusing spreadsheet program and the results were given in tabular and graphical form,and then discussed.

The study outcome is that the power plant that used HCGO wascheaper and facility in process storage, transport and draining of oil than HFO,therefore, the pollutant of draining of HFO would be reduced when HCGO is used. However, the general appearance of the HCGO specification is that of lowviscosity fuel which requires little or no heating above the ambient temperature inorder to be atomized satisfactorily.

Furthermore, the total steam production per unitenergy was increased from (0.34kg / MJ) to (0.36kg / MJ), which represents (5.4 %)increase in steam production per MJ of HCGO, while the specific fuel consumptionwas dropped from (0.32Ton / MW) to (0.26Ton / MW), due to combustion efficiencyincreased, which represents (16.3 %) reduction in fuel consumption per MW. Consequently, the power price was dropped from (0.07$ / kw-hr) to (0.05$/kw-hr),which represents (24.2 %) savings in power price/KW-hr; therefore, thefundamental reasons of the power price savings could be attributed to thefollowing: Low price and high calorific value of HCGO over HFO. Low, viscosity and pour point of HCGO contributes in elimination of auxiliarysteam (almost 66654 $ / year savings) and line trace heating. Numbers of personnel required for HCGO draining is less than HFO.

Main Subjects

Mechanical Engineering

Topics

• Petroleum
• Sudan
• Khartoum
• Economic aspects
• Environmental aspects

No. of Pages

116

Table of Contents

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-367838