Temperature - European Investment Bank

WEST AFRICAN POWER POOL (WAPP) PÖYRY ENERGY LTD.
Mount Coffee HPP ESIA and RAP 2012-09-18
ESIA Report Page 194
Liberia’s Energy Supply Options 2010-2040
The report “Options for the Development of Liberia Energy Sector” has identified the
following energy supply options for the period 2010-2040 for Liberia:
� Diesel
� Leasing Diesel
� Heavy Fuel Oil (HFO)
� Biomass
� Hydropower
� West African Power Pool Transmission Interconnection for Côte d’Ivoire,
Liberia, Sierra Leone and Guinea (WAPP CLSG).
Basically the generation options retained in the World Bank report are similar to the
ones mentioned in the Electric Master Plan of LEC.
For the generation option hydropower, the following projects were considered:
� Hydro 1, Mt Coffee phase 1, without Via Reservoir, 66 MW
� Hydro 2, Mt Coffee and Via Reservoir, 66 MW
� Hydro 4, SP-1B and SP-2 and Via Reservoir, 198 MW
� Hydro 3: Mano River, 90 MW.
For the imports of electricity the following four options retained are:
� WAPP phase 1 Low, 28 MW
� WAPP phase 2 Low, 23 MW
� WAPP phase 1 High, 50 MW
� WAPP phase 2 High, 47 MW.
Least Cost Energy System Expansion in the Medium and Long Term
The medium-term covers the period 2009-2015 and the long-term, the complete period
2010-2040.
The WAPP CLSG interconnection project is expected to be operational at the earliest in
the year 2015. According to the calculations done in the Report “Options for the
Development of Liberia Energy Sector”, a gap in the supply-demand balance would
appear, starting in the year 2012. It is proposed to eliminate this gap by adding HFO
generating units and in the year 2015 the WAPP CLSG would supply the additionally
required capacity and energy.
To determine the least cost energy system expansion in the long-term (2010-2040), the
standard approach usually applied in such a case was followed. The selected model
determines the overall production cost for any additional capacity installed over time,
subject to meeting the growing demand, the power plant constraints and the required
reliability levels. The capital and operating cost of each supply alternative are combined
and discounted to obtain a net present value of all the costs incurred over the period
2010-2040 for each studied least-cost generation expansion scenario. The generation