Electricity + Control September 2018

ENERGY MANAGEMENT + ENVIRONMENTAL ENGINEERING

Cutting costs with new solar system

generated by advanced JA Solar modules and Huawei inverters installed at the 35 000 m² factory in Roodepoort. Completed in July this year, the new systemwill more than halve the hardware company’s electricity bill. “The key factors we consid- ered during the design phase of this project was to reduce the elec- trical bill by 60% and reduce diesel fuel usage during power out- ages. I am pleased that we have met these objectives for Eureka,” says Nathan Bergemann, Director of Hanonox.He adds that owing to its numerous financial and environmental benefits, the demand for renewable energy is on the rise. As a result, alternative power solutions are becoming increasingly affordable and accessible, in- cluding finance options with zero capital investment or risk, offering immediate bottom-line savings for South African businesses. Enquiries: Hanonox:Tel. +27 (0)10 312 5790 or email info@hanonox.co.za dreas Görtz, Director – Power Generation Business at Rolls-Royce Power Systems, explains: “In-house expertise in all the key tech- nologies involved, coupled with state-of-the-art simulation and anal- ysis tools, have allowed us to develop a generation of engines that enable the new diesel genset to beat the standard”. One reason is the high engine load factor which allows the standby genset to op- erate at 85% of its maximum power – a value which surpasses the requirements set out in ISO-8528-1 by 15%. Furthermore, in its vital power role the generator can run for up to 500 hours a year. “In case of a power outage, delivering a dependable power supply in a matter of seconds is key. Data centres with their sensitive IT facilities present the additional challenge of mitigating fluctuations in voltage and frequency. The gensets have therefore been developed to curb these variations by design,” continues Görtz. Certified to feed the public grid, Series 4 000 gensets comply with VDE guidelines (the German Association for Electrical, Electronic & InformationTech- nologies) and are certified for mains parallel operation. This allows users to feed power into the public grid at a profit and safeguard supply in cases of emergency. In terms of energy efficiency, this is also a sensible approach to dealing with the increasingly common grid instabilities resulting from the use of renewables. Enquiries: Silke Rockenstein. Email silke.rockenstein@rrpowersystems.com

Johannesburg-based turnkey energy solutions company, Hanon- ox, has recently completed a 312 kWp solar project for major South African hardware manufacturer, Eureka DIY Solutions. The project is a combination of two systems 92 kWp and 220 kWp ―

Rolls-Royce rolls out new standby gensets

The MTU Onsite Energy 20 V 4 000 DS3600 genset was launched recently. Based on enhanced MTU Series 4 000 engines from Rolls-Royce, the 20 V 4000 DS3600 diesel genset significant- ly outperforms previous offerings with a 10% uplift to around 3000kWofelectricaloutput(3730kVA)instandbyoperation,andsome 2 700 kW of electrical output (3390 kVA) when generating prime power. Earlier models of this Series 4 000 engine have a proven track record with over 23 000 units sold for power generation ap- plications. More than 30 of the new units are already set for delivery in 2018. Most of the initial consignment, supplying 75 MW overall, is destined for a global internet group to generate standby power for its European data centre. MTU Onsite Energy has already an- nounced further advancement to an even higher level in the form of the 20 V 4 000 DS4000 diesel genset, delivering roughly 16% more output, amounting to as much as 3 200 kW of electrical out- put (4 000 kVA of standby power), compared with previous offer- ings. At around 20 m 2 both units take up strikingly little space. Steadily increasing power demands in mission-critical applica- tions necessitate the use of ever more powerful engines to allow the gensets to step in smoothly and cover demand should a contin- gency arise. Performance has been boosted by optimising engine design to allow for a higher BMEP (brake mean effective pressure) in the cylinders, and fitting a redesigned turbocharger and modified peripheral equipment with some astutely matched components. An-

26 Electricity + Control

SEPTEMBER 2018