Solar plant powers MTN's Jozi office

2014-07-10 13:21
MTN's concentrating solar cooling system. (File, MTN)

MTN's concentrating solar cooling system. (File, MTN)

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Cape Town – Cellphone operator MTN has opened a concentrating solar cooling system at its headquarters in Gauteng, in a bid to reduce its carbon footprint.
The concentrating solar cooling system is driven by a cutting-edge technology called Linear Fresnel Concentrating Solar Power that uses heat generated from the sun and has a peak cooling capacity of 330kW.

The system consists of 242 solar mirrors covering a total area of 484m², which track the sun to generate pressurised hot water at 180 degrees Celsius. The hot water in turn powers an absorption chiller that produces chilled water circulated into the data centre for the cooling of IT equipment.
The mirrors follow the movement of the sun, based on the GPS location, orientation and the date and time. This information guides the system to track the sun to concentrate on the central absorber tube where heat is generated.
The absorption chillers use a lithium bromide water solution, which uses water as the refrigerant. This is a completely green solution that has zero global warming potential and no ozone depletion potential.

When it rains, the mirrors move into a self-cleaning position, and on cloudy days, the mirrors turn down into a protective stow position.
The CSP system cements MTN’s green credentials, said MTN SA CEO Zunaid Bulbulia. “MTN is acutely aware of the impact of global warming and its adverse impact on emerging markets including South Africa.”

“We continuously explore ways in which we can not only reduce our carbon footprint, but also substantially reduce our electricity consumption, which will release additional capacity for the national grid.”

This project is part of the worldwide ‘dena Solar Roofs Programme’ coordinated by the German Energy Agency. “We are happy that this innovative system generating green energy is now a part of the MTN strategy to reduce its carbon footprint,” said the agency’s Gabriele Eichner. “So this lighthouse project is a win-win-situation for all.”

Read more on:    mtn  |  johannesburg  |  renewable energy  |  environment

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