Designing a high pressure feed water heater

  In a power generation process, the heat generated in the boiler can be used for heating purposes in other parts of the power plant in order to improve overall efficiency. A wide range of heat exchangers are used in power stations, some of which are feed water heaters, which are used to raise the […]

Thin film solar photovoltaic technologies

  The number of projects worldwide using thin film PV in preference  to silicon wafer technology is increasing, and record  efficiencies for different technologies are being claimed. Thin film PV continues to show advantages over other forms, both in manufacturing and performance. This article looks at some of the latest developments in both products and […]

Eskom’s energy and revenue loss management

  Energy losses continue to be a challenge for utilities globally, both in developed and developing economies. As a result of increasing production costs in the value chain, utilities have to manage these losses at acceptable levels. In South Africa the problem is exacerbated by Eskom’s generation capacity challenges. Losses incurred in electrical power systems […]

Improving power quality in real-life applications

  Poor power quality is one of the principal reasons for inefficient power usage and electrical equipment failure. Power quality refers to the maintenance of electrical parameters including voltage and frequency. Dips and spikes in supply voltages are common in many industrial environments and are usually caused by the switching on and off of heavy […]

Magnetically controlled shunt reactors – a new type of FACTS device

  The need for more efficient electricity systems management has given rise to innovative technologies in power generation and transmission. Worldwide transmission systems are undergoing continuous changes and restructuring. They are becoming more heavily loaded and are being operated in ways not initially forecasted. Transmission systems must be flexible to react to more diverse generation […]

Secure, interoperable functionality for power line carrier based infrastructures

  Power line carrier (PLC) based systems are proving an attractive and cost-effective solution for smart metering deployments in the residential domain. In Europe, PLC solutions have already been implemented widely in some countries, while others are at an advanced stage of planning for large-scale roll-out. The installed base in Spain (based on Prime Alliance […]

Modern building management systems tackle efficiency of energy, utilisation

  Buildings must keep pace with today’s fast-paced business world. The widespread adoption of information and communication technology, including computerised building management systems, reflects this trend. But implementing new technology is not enough. Amid pressure to constantly improve performance, businesses are making increasing demands on their employees to be more responsive and mobile. Compared to […]

Not-so-smart metering: A consumer’s point of view

  Some municipalities have started installing smart meters at residential customer’s premises, and customers are about to enter a new era in electricity distribution. Smart metering, we have been told, not only allows the electricity utility to read the meter remotely, but can allow customers to monitor and control energy consumption and keep their own […]

Avoiding a substation explosion

  An authorised person closed an 11 kV oil circuit breaker (OCB) on to a fault at a main substation. The OCB exploded and the force of the blast blew off the substation doors, seriously damaging the building. The person broke his right arm, when the door behind which he was standing was blown open. […]