La Société Tunisienne de l'Electricité et du Gaz (STEG) Preparatory Survey on Rades Combined Cycle Power Plant Construction Project in Tunisia Final Report March, 2014 Japan International Cooperation Agency (JICA) Tokyo Electric Power Services Co., LTD 7R CR(5) 14-007 Preparatory Survey on Rades Combined Cycle Power Plant Construction Project in Tunisia Final Report Table of Contents Summary Chapter 1 Preface 1.1 Background of Survey ............................................................................................. I-1 1.2 Purpose of Survey and Scope of Survey .................................................................. I-3 1.2.1 Purpose of Survey .............................................................................................. I-3 1.2.2 Scope of Survey ................................................................................................. I-3 1.2.3 Duration of the Study ........................................................................................ I-4 1.3 Organization of the Team ........................................................................................ I-6 Chapter 2 Socio-economic Situation 2.1 Overview ............................................................................................................... II-1 2.1.1 Geography and Climate ................................................................................... II-1 2.1.2 Administrative Organization ........................................................................... II-1 2.1.3 Political Situation ............................................................................................ II-2 2.2 Socio-economic Conditions ................................................................................... II-2 2.2.1 Population ........................................................................................................ II-2 2.2.2 Labor Force ..................................................................................................... II-3 2.3 Macroeconomic Conditions ................................................................................... II-4 2.3.1 Gross Domestic Product .................................................................................. II-4 2.3.2 Production Index ............................................................................................. II-6 2.3.3 Inflation and Monetary Supply ........................................................................ II-6 2.3.4 Balance of Payment ......................................................................................... II-7 2.3.5 Exchange Rate ................................................................................................. II-7 2.4 Government Finance and External Debt ................................................................ II-8 i Preparatory Survey on Rades Combined Cycle Power Plant Construction Project in Tunisia Final Report 2.4.1 Public Finance ................................................................................................. II-8 2.4.2 External Debt ................................................................................................... II-9 Chapter 3 Overview of the Power Sector in Tunisia 3.1 Overview of the Power Sector in Tunisia ........................................................... III-1 3.1.1 Organization ................................................................................................. III-1 3.1.2 Overview of Existing Power Plants .............................................................. III-2 3.1.3 Overview of Power Transmission Facilities ................................................. III-5 3.1.4 Overview of Renewable Energy ................................................................... III-9 3.1.5 Power Plant Development Plan and Power Demand Forecast ..................... III-9 3.2 Electricity Tariff ................................................................................................ III-13 3.3 Financial Position of STEG .............................................................................. III-14 3.3.1 Balance Sheet ............................................................................................. III-14 3.3.2 Income Statement ....................................................................................... III-15 Chapter 4 Survey of Rades Power Plant Facilities 4.1 Site Situation ......................................................................................................... IV-1 4.1.1 General ........................................................................................................... IV-1 4.1.2 Site Selection .................................................................................................. IV-1 4.1.3 Site Condition ................................................................................................. IV-2 4.2 Existing Facilities ................................................................................................. IV-8 4.2.1 Overview of the Existing Equipment in Rades A&B ..................................... IV-8 4.2.2 Organization Structure and Other Records of Rades A&B TPPs ................... IV-9 Chapter 5 Fuel Supply Plan 5.1 Overview of Natural Gas in Tunisia ...................................................................... V-1 5.2 Volumes of Production, Import and Consumption of Natural Gas (Performance Record) ............................................................................................ V-4 5.3 Prediction of Natural Gas Consumption and Supply Plan ..................................... V-5 ii Preparatory Survey on Rades Combined Cycle Power Plant Construction Project in Tunisia Final Report 5.4 Possibility of Gas Supply to Rades C CCPP ......................................................... V-6 5.4.1 Verification of Natural Gas Supply Agreement ............................................... V-6 5.4.2 Verification of the Estimated Required Supply Volume with Consideration Given to Project Life................................................................ V-6 5.4.3 Verification of the Adequacy and Feasibility of the Project from the Viewpoint of Gas Supply .......................................................................... V-7 Chapter 6 Basic Design 6.1 Conceptual Design ................................................................................................ VI-1 6.1.1 Design Conditions .......................................................................................... VI-1 6.1.2 Outline of Plant System .................................................................................. VI-8 6.1.3 Study on Shaft Configuration ......................................................................... VI-8 6.1.4 Candidate Gas Turbine and Performance ..................................................... VI-19 6.1.5 Plant Performance by Candidate Gas Turbine .............................................. VI-22 6.1.6 Condenser Cooling System .......................................................................... VI-29 6.1.7 Compressor Inlet Air Cooling System .......................................................... VI-31 6.2 Plot Plan ............................................................................................................ VI-38 6.3 Basic Systems for Plant Design .......................................................................... VI-40 6.3.1 Gas Turbine System ...................................................................................... VI-40 6.3.2 Steam Turbine System .................................................................................. VI-48 6.3.3 Heat Recovery Steam Generator (HRSG) System ....................................... VI-51 6.3.4 Water Treatment Plant .................................................................................. VI-61 6.3.5 Fuel Gas Supply System ............................................................................... VI-68 6.3.6 Electrical Equipment .................................................................................... VI-71 6.3.7 C&I Equipment ............................................................................................ VI-77 6.3.8 Civil Engineering and Architectural Facilities ............................................. VI-80 6.4 Construction Program ......................................................................................... VI-82 6.4.1 Material/Equipment Procurement Program .................................................. VI-82 6.4.2 Material/Equipment Transportation Program ............................................... VI-84 iii Preparatory Survey on Rades Combined Cycle Power Plant Construction Project in Tunisia Final Report 6.4.3 Present Condition of the Site ........................................................................ VI-86 6.4.4 Construction Schedule .................................................................................. VI-88 Chapter 7 System Analysis and Grid Connection Plan 7.1 System analysis ................................................................................................... VII-1 7.1.1 Objective ...................................................................................................... VII-1 7.1.2 Premise ......................................................................................................... VII-1 7.1.3 Power Flow Analysis ...................................................................................