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Power and fuel supply options study for the Toliara Project in Madagascar
In 2018, Zutari was appointed as technical advisor for a power and fuel supply options study for the mineral sands focused Toliara Project in Madagascar for the Australian Securities Exchange (ASX) listed mining company, Base Resources. After a prefeasibility study and options analysis, Zutari recommended a hybrid power plant consisting of a solar photovoltaic (PV) system, reciprocating engines, and battery energy storage, to be procured through an independent power producer (IPP).
The second phase of the project involved the sourcing of an IPP to finance, design, procure, construct, own and operate the hybrid power plant to be located at the mine. This included the development of the request for proposal (RFP), the power purchase agreement (PPA) in conjunction with the client''s legal team, the representative load profile, and the technical requirements.
Seven shortlisted bidders were invited to submit full commercial, funding, and technical tenders for the supply of energy from a hybrid power plant under a 20-year PPA.
Zutari facilitated the tendering process, which attracted bids from a list of international IPPs. Both Base Resources and the IPPs commended the level of technical detail provided in the tender documents, which assisted the IPPs to prepare detailed and firm priced bids. Zutari assisted Base Resources by evaluating the tenders and providing a recommendation on a shortlist of preferred tenderers, who submitted best and final offers in May 2020. Zutari will continue to support Base Resources throughout negotiations with the preferred IPP.
While hybrid power projects have been developed for existing mines, this is – to Zutari''s knowledge – the largest off-grid hybrid power plant ever to be developed in parallel with a greenfield mine development. This posed several unique challenges, including how the operational performance guarantees of the power plant should be structured; how to incentivise the IPP to continuously optimise performance such as fuel consumption and spinning reserve, while still providing reliable, quality power to the mine; and not having load profile data due to it being a new development, which is critical in designing an off-grid hybrid power plant.
To overcome these challenges, Zutari developed a unique performance guarantee mechanism, which removes the risk of variable solar resource from the IPP while incentivising the IPP to continuously optimise the combined efficiency of the power plant. The mechanism penalises the IPP for poor performance but allows both the mine and the IPP to share in the success of performance improvements.
The Zutari team also worked closely with Base Resources to simulate a detailed and accurate load profile that can be used as a basis for the design of the hybrid power plant. To create this load profile, our team had to develop an in-depth understanding of the proposed operation of the mine, including planned and emergency start-up and shutdown sequences, characteristics of planned and unplanned outages, and worst-case load fluctuations. The team also used load profile data from Base Resources'' operational mineral sands mine in Kenya to calibrate the simulated load profile.
The solar and battery storage portion of the hybrid power plant is expected to reduce the power plant''s greenhouse gas emissions by at least 30%. With the incentive for future performance improvements, further greenhouse gas reductions are expected.
Base Resources and sub-contractors will employ 1 629 people during the construction of the Toliara Project. An additional 2 148 indirect and induced jobs will also be created, leading to an annual average of 3 777 created. During the operational phase, 980 people will be directly employed.
"The way the performance guarantees, solar PR and heat rate of thermal generation all integrated into a measurable, guaranteed-value for the client, was an innovative result and a first of its kind in Africa. The efficiency of the tender process led to world-class hybrid power companies delivering solutions at very competitive prices for the client," says Loda Dedekind, Zutari Technical Director.
*The Aurecon Africa business has been officially renamed Zutari as at 21 July 2020. Zutari acquired Aurecon Middle East on 20 November 2020.
Madagascar, 26 March 2021
Green Energy Solutions (GES), a joint venture of the AXIAN Group and GreenYellow Group, with the collaboration of Colas Madagascar, will build a hybrid solar power plant combining photovoltaic and thermal technologies at the Ambokatra quarry in Toamasina.
GES and Colas Madagascar have signed a seven-year energy agreement to supply electricity to meet 100% of the energy needs of the Ambokatra materials production site using a new hybrid technology.
This hybrid plant is fully financed, built and operated by GES will be mobile, i.e. operating independently of the electricity grid. This type of equipment is particularly suited to remote areas and can be installed, commissioned and be quickly ready for operation.
The plant, which will be completed by the end of June 2021, will be equipped with state-of-the-art electrical and renewable energy technologies, guaranteeing availability and efficiency for Colas Madagascar. The solar power plant will have a capacity of 148 kWp and will consist of two fully integrated and installed modules. It will also be equipped with an energy storage system that will allow the site to be powered at night and during closing days.
“The AXIAN Group is committed to a strategy of reducing the carbon footprint of its activities. Thus, setting itself an ambitious target to reach 100% of the energy consumed by the Group to be renewable by 2030. More than attaining carbon neutral activities, we want to be a catalyst for the energy transition in Madagascar and on the African continent. This Ambokatra project is the first in Madagascar to be equipped with a hybrid power plant aimed at significantly reducing greenhouse gas emissions”, says Benjamin Memmi, Managing Director of AXIAN Energy.
“GreenYellow is pleased to support the Colas Group in its energy transition through this Ambokatra project. This reinforces the group''s ambition to tbe the energy partner of private and public organisations in Madagascar with one common guideline: Consume better, Consume less!” shares Pierre Marouby, Managing Director of GreenYellow Indian Ocean.
Established in 2017, GES supports the energy transition of Madagascar and is committed to deploy state-of-the-art energy technologies and services as a reference in the sector to benefit the population and the private and public Malagasy economic actors:
– Public sector: GES operates under government mandates to provide cleaner, more reliable and affordable energy solutions to cities.
– Private sector: GES delivers reliable and innovative turnkey energy solutions for businesses to optimise their operations and accelerate their energy transformation.
GES offers an IPP model (independent power producer) or EPC model (Engineering Procurement and construction) and handles the development, construction and financing phases of the project up to the operation of the facilities, offering its customers a comprehensive energy service.
Axian is a pan-African group specialised in 5 high growth potential sectors: real estate, telecoms, financial services, energy and innovation. Axian is convinced that energy is a necessity and supports ''Let''s Renew Energy'' in its innovations to provide access to reliable, affordable and sustainable energy solutions. Axian is present in 6 countries of the Indian Ocean and Africa where it acts as a partner in the socio-economic transformation of these countries in which it operates.
Together with our 5,000 driven and passionate employees, we consistently ensure that our activities have a lasting and positive impact on the daily lives of millions of Africans across all of our business sectors.
The Axian Group is part of the United Nations Global Compact initiative and is engaged in integrating its 10 principles at the heart of its current and future strategies and activities.
In 14 years, GreenYellow has become a major internation energy player in France and a real ally for companies and local authorities.
GreenYellow is an expert in photovoltaic production, energy efficiency solutions and energy services that offers its clients a cross-cutting platform of solutions across the entire energy value chain to make their energy transition a beneficial and committed reality.
The company currently has over 340MW of installed powerplants and operates more than 3,000 energy performance contracts worldwide which saves 85 million in terms of savings.
GreenYellow is constantly enhancing its product range through innovation, to respond to the needs of public and private actors and support them in reducing their carbon footprint.
The company is present on four continents and has over 550 employees worldwide in its offices in Paris, Aix, St Etienne, Sao Paulo, Bogota, Bangkok, Saint Denis de la Réunion, Antananarivo, Rabat, Dakar and Ouagadougou.
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