Energy Globe World Award 2019
With the project:
The Waterloo Revolution
Spurred by the introduction of an Ultra-Low Emission Zone for part of the capital in 2019, Transport for London intends to introduce Europe’s largest fleet of electric buses. Therefore, it chose to partner Go-Ahead London, the biggest bus company in the capital, on an ambitious garage conversion, from diesel to electric operation, which was delivered on-time and to budget in 2016.
As with any world city, London’s transport system evolves and it is on the cusp of additional volume being added to it, most notably in the form of the Elizabeth Line, a heavy rail scheme linking the eastern suburbs to those in the west (and well beyond in both directions), via the heart of the city. In 2000, London elected its first citywide Mayor and in the intervening 18-years, the bus system has benefitted from a period of sustained growth, supported by record levels of volume, frequency and quality.
In early 2015, having successfully secured a five-year contract to run London bus routes 507 and 521, work started on converting the site, in readiness for a full fleet of electric buses the following year. The project brief was to achieve the minimum amount of disruption to the traveling public and neighbors. The garage maintained 99.8 per cent operated mileage throughout this time, while pro-actively consulting the community, with no major issues raised by those living and working in the vicinity.
E-buses drive in a completely different style to diesels and the drivers were re-educated, especially when it comes to acceleration and braking. One of the many benefits is that a fleet of two-year old buses look like new, with little or no bodywork damage and very limited brake pad wear, as a result of regenerative braking.
With the project:
Thermal Solar Plant Cerro Dominador
The CSP Cerro Dominador is a plant with solar thermal tower technology that uses a series of 10,600 heliostats that track the sun on two axes, concentrating the solar radiation onto a single point on the upper part of the tower. Each heliostat consists of 32 individual mirrors that reach 140 m2. At the receiver, the heat is transferred to the molten salts. In a heat exchanger, the molten salts transfer their heat to a water stream to generate superheated and reheated steam which powers a turbine capable of generating around 110 MW of power.
In Chile, energy is produced mainly through the use of water power, gas and coal. The use of solar power is still not very common. Cerro Dominador emerged from a tender by the Chilean Government and the plan is to develop and build a 110 MW solar thermal plant with 17.5 hours of thermal storage with the help of molten salts. The solar thermal electric plant construction began in May 2014 and the photovoltaic plant construction started in January 2015.
A huge breakthrough was made by this project, since a large solar thermal electric plant with the largest thermal storage in the world is being built. Ten thousands of mirrors are tracking the sun and then reflect and concentrate the solar light on a single point. Molten salts are used to transport the resulting heat to a heat exchanger. There, the heat is used to heat a water stream which generates very hot steam. This steam powers a turbine which can generate more than 100 MW of environmentally friendly power. Thanks to the thermal storage, the power supply can be guaranteed 24 hours a day.
For Latin America this technology is a real revolution, and being the first on the continent, it marks a step of entry and a real possibility to contribute to the confrontation of climate change. The plant has the largest thermal storage in the world which ensures the supply of green electricity 24 hours a day which makes it a real alternative to the production of fossil fuel based power.
With the project:
Stockholm Data Parks
Stockholm Exergi captures excess heat from data centers, sewage systems and industrial processes. In 2012, the work was intensified, and a heat recovery offering named Open District Heating was launched in 2014. With data centers being the largest potential source of excess heat, it was decided in 2017, in cooperation with the City of Stockholm, grid provider Ellevio and dark fiber operator Stokab, to launch Stockholm Data Parks to encourage major data center operators to locate in Stockholm with a view to performing heat recovery on a large scale.
By 2040, the City of Stockholm should be entirely fossil fuel free. Besides making transportation green, the main challenge is to make the heating of the city 100% renewable. Already today, thanks to the city‘s district heating network and conscious selection of technologies and fuels, more than 89% of the heating is fossil fuel free, with the heating network covering close to 80% of the city‘s population. Phasing out the remaining fossil fuels requires a multipronged strategy, deploying new technologies and fuels.
The main objective of Stockholm Data Parks is to get more data centers to do heat recovery and contribute to the city‘s objective to become entirely fossil fuel free by 2040, with Stockholm Exergi becoming fossil fuel free already before 2030. The reuse of data center heat allows Stockholm Exergi to phase out fossil fuels, and data centers deploying renewable electricity can become climate net positive. Notably, a 10 MW data center load can heat 20,000 modern residential flats. For the data center, heat recovery is financially very attractive since the excess heat is purchased for around $ 200,000 per MW and year.
With the booming data center industry already today consuming close to 2% of the global electricity, and even more if crypto currencies are included, there is an urgent need to make data centers energy efficient. With heat recovery, energy efficiency in data centers is taken to the next level. The main innovations relate to bridging the gap between key actors that so far have not cooperated. By integrating their systems, a major positive impact can be achieved on the environment, the electrical grid and for profitability.