Lightning protection: leave it to the experts

  by Hans van de Groenendaal, EE Publishers Lightning protection is a serious, yet often underestimated issue, which requires professional equipment, installed professionally. Dehn Protection South Africa MD Alexis Barwise shares some strong views on the subject. Barwise says it is inadvisable to apply a rule of thumb and to think you and your property […]

Benefits of simulation models for assessing energy savings on mine cooling systems

by Alistair Holman, Dr. Johann van Rensburg and Dr. Deon Arndt, CRCED Pretoria, North West University At a time of immense economic pressure and fragile labour relations in South Africa, it is important for mines to be energy efficient, reduce energy costs, ensure safe working conditions and to minimise unwanted downsizing. Download PDF

Characteristics and performance of a carbon dioxide trans-critical water to water heat pump

by Paul Maina and Zhongjie Huan, Tshwane University of Technology A study and findings on improvements in the efficiency of high-pressure CO2 heat pumps by varying their various operational parameters. Download PDF

Commercial heat pumps: a retrospective M&V case study

  by R Larmour, University of Cape Town Aspects of the measurement and verification (M&V) of a commercial energy efficiency project including optimal data usage; target specification and the possible effects of the subsidy structure on M&V credibility. Download the Pdf

Truths about UPS safety

  by Bob Lauricella and Zach Greenhaw, Eaton This article answers some common questions about UPS maintenance and how to reduce the risks associated with servicing UPSs and their batteries. When working with data center and commercial facility power systems, shocks of 100 to more than 2000 mA are possible. Energised electrical equipment also presents […]

Energy efficiency tax incentives – some practical issues and concerns

  Regulation 12L was promulgated in December 2013 and is currently “open for business”. Let’s look at the facts and what this could mean to your company. The announcement of 12L caused quite a stir in the industry with Energy Services Companies (ESCOs) and end-users alike, who have been awaiting the promulgation of regulation 12L […]

Reducing compressed air wastage in underground mines

by SJ Cloete and DF le Roux, BBE Energy, and RT Buhrmann, Rumeg Systems An investigation into compressed air wastage at the stopes in underground mines shows that rock drill operators (RDOs) leave manifold valves open due to negligence and for purposes of ventilation. Download the PDF document

Explosive environments: fundamentals of area classification

by Dr. Johannes Auret,  Explolabs A guide for plant management and technical staff on how to conduct an area classification, the process whereby the degree of exposure to explosive atmospheres for a plant area is determined. Download the PDF document

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