Monthly Archives - July 2017

Wind Power and Wind Turbines  

Wind Power and Wind Turbines Introduction Wind power is the energy extracted from the wind, which is essentially moving air. Wind has kinetic energy which can be harnessed and converted to other forms, either mechanical ore electrical, which can be used to do work. Wind energy is extracted using sails and wind turbines. Early wind power technology involved the use of windmills that produced mechanical energy for running wind pumps that pumped water.  Currently, wind energy is a big renewable energy [...]

How Solar Energy Works 

How Solar Energy Works             Solar energy harvesting is the conversion of electromagnetic radiation from the sun into electricity. Solar cells convert sunlight into electric current through photovoltaic effect. Silicon solar cells are manufactured from doped silicon semiconductor. Exposure of the semiconductor to sunlight causes the movement of electrons and holes which sets up an electric current (Lee, Lu, and Tseng 2). An interconnection of several solar cells forms a solar module.   Dye sensitized solar cells are made from natural [...]

Starting Three Phase Induction Motors

Starting Three Phase Induction Motors Three phase motors are powered by three phase mains power supply. The stator in a three phase motor has provisions for slots that can accommodate three phase winding. The three phase windings are arranged so that they can produce a rotating magnetic field. The rotor has parallel laminated conductors shorted at the ends by the end rings.  The conductors are made of heavy copper or aluminum bars and are skewed from the central axis. This [...]

DC Motor Controls

DC Motor Controls             Motor controls are used to start and stop motors during operation. Motors draw excess starting current which can damage electrical circuits if not controlled. Motor starting control circuits act to reduce the starting current. Motor braking involves converting the motor to a generator using the accumulated kinetic energy. The generated current acts against the current from the power supply thus reducing its effect on the motor. This is a paper on the starting and stopping controls [...]

Mechanics of the Eco-friendly Electric Cars

Mechanics of the Eco-friendly Electric Cars Introduction Electric cars are automobiles powered by torque from powerful electric motors. Battery banks in the car energize the motors but they require regular charging. Cars with both electric motors and internal combustion engines as prime movers are referred to as hybrid cars. Hybrid cars are advantageous than both electric and conventional vehicles because of fuel and kinetic energy conservation. Electric cars have been developed in order to reduce air pollution through greenhouse emissions [...]

Pollution as an Ethical Issue

Pollution as an Ethical Issue INTRODUCTION Pollution entails emission of toxic compounds into the environment. Air pollution is the discharge of toxic gaseous compounds into the atmosphere. Air pollutants are comprised mainly of carbonaceous compounds such smoke from cigars, chimneys, and smoke stacks in industrial settings. Air pollutants contain biological molecules or particulates which pose the danger of diseases and long-term health complications to humans, animals, and plants. This paper focuses on the effects of pollution and explores ethical aspects of [...]


Carbon Carbon (C) is a chemical element of atomic number 6 and belongs to group 14 on the periodic table. Carbon is a nonmetallic element and it’s the sixth in abundance in the universe. Coal is the most readily available source of carbon. Carbon in its raw form is of little value and has to be processed into commercially applicable forms. Commercial carbon appears in three allotropes: graphite, amorphous, and diamond. This is a research paper on carbon, its applications [...]

Electric Vehicles versus Conventional Fuel Engines

Electric Vehicles versus Conventional Fuel Engines SUMMARY Global warming is a serious issue that threatens the survival of future generations. Various methods are being devised to reverse the effects of global warming such as the use of green energy. Motor vehicles running on fossil fuels produce greenhouse gases which are a major cause of global warming. Therefore, it’s almost impossible to address the issue of global warming without considering emissions from the transport industry. Electric vehicles are a viable and environmentally [...]

Global Warming

Global Warming             Global warming is the rise in average global temperatures. The rise in global temperatures is occasioned by the emission of greenhouses gases such as carbon dioxide, carbon monoxide, methane, and nitrogen oxides. The gases are released from industrial process that combust fossil fuels such as diesel, coal, and petrol. Such processes include generation of electrical energy in thermal power stations, burning of coal in industrial boilers, and combustion of fossil fuels in internal combustion engines. When these [...]