Articles: EE Publishers

Combining natural daylight and artificial lighting in office lighting designs

Office lighting must be flexible, save energy, be controllable and must also make the most of daylight. This is because improved workplace lighting, in terms of both natural daylight and artificial light, has been linked to a 15% reduction in absenteeism in office environments. Related studies have reported productivity increases from 2,8 to 20%, attributable […]

Deep disparities in the global energy system

Deep disparities define today’s energy world: The dissonance between well-supplied oil markets and growing geopolitical tensions and uncertainties; the gap between the ever-higher amounts of greenhouse gas emissions being produced and the insufficiency of stated policies to curb those emissions in line with international climate targets; the gap between the promise of energy for all […]

Choosing a variable frequency drive or soft starter

When accelerating an AC motor to full speed using a full voltage connection, a large inrush current may be required. Additionally, the torque of the AC motor is mostly uncontrolled and can shock the connected equipment, potentially causing damage. Variable frequency drives and reduced voltage soft starters can reduce inrush currents and limit torque thereby […]

Addressing the late and non-payment by government

A recent survey by the Association of South African Quantity Surveyors (ASAQS) shows that the majority of quantity surveyors experience late- or non-payment of contractors on national, provincial and municipal projects. ASAQS president, Christelle Bown, presented the survey findings during a panel discussion at the 2019 Master Builders Annual Congress in September 2019 in Johannesburg. […]