Search

Uninterruptible Power Supplies (UPSs) are widely used for power conditioning applications, whereby the load is to be supplied with current and voltage waveforms containing minimal disturbance. A UPS also provides emergency power to critical loads in case of utility mains failure, and as such...

One of the main factors that led to this research on wind and solar energy hybrid application was the need to empower rural communities with communication technology, namely cellular phones which are now widely used in Zambia. A major constraint to the use of these devices in the rural areas is...

Today approximately one-and-half billion people around the world, especially in the developing world, use biomass based source of energy for cooking and heating. Conversion efficiency of the biomass in many cases is low resulting in unsustainable use of the biomass resource and negative...

Although traditional per-phase circuit has been widely used in steady-state analysis and design of induction motors, it is not appropriate to predict dynamic performance of the motor, In order to understand and analyze vector control of induction motors, the dynamic model is necessary....

Production by pressing in its many forms together with sheet metal working constitutes one of the most absorbing branches of production engineering, and one which plays a vital role in domestic life, being largely responsible for many of the comforts which have been brought within the reach of...

The requirement for insolation models has been appreciated for many years in designing solar energy systems properly, for locations lacking insolation data base. Unfortunately, for most geographical areas in Zambia, insolation data is not available. This research thesis gives an account of global...

Currently Fibre-Glass (FG) is the most widely used reinforcement in polymer composites. However, GF or fibre (|rassijs very expensive and non-biodegradable hence the need for alternative reinforcement materials that are less expensive like natural fibres. Natural fibre reinforced polymers (NFRPs)...

As with any business organization in a competitive market, the financial viability depends on the ability to maximize its returns at minimum costs. The problem of minimizing the total costs on transmission lines wayleave maintenance or bush clearing is one of minimizing the costs on labour,...