About 90% of Nigeria's potential hydro sites remain undeveloped, 33% (~ 800 MW) of total power is currently generated by hydraulic turbines, the remaining 67% (~ 1732 MW) by thermoelectric generators. In 1985–1986, 68% (~ 3245 MW) will be generated by hydraulic turbines and the remaining 32%...

Some commonly available tropical tree-crops such as pawpaw, plantain, banana, mango, orange, lime, and pineapple are identified as potential resources of renewable electrical energy. and pineapple are identified as potential resources of

Compressed air energy storage (CAES) power systems are being considered by electric utilities for load-leveling application. Their economic benefit and the extent of premium fuel conservation is dependent on their design. An optimum design approach for CAES is presented in this paper. It is...

Polished samples of austenitic stainless steel AISI 321 were chemically oxidized in 0.1–0.6 M aqueous solutions of chromic and sulphuric acids at 90 °C for an oxidation time of 25 min, as well as for oxidation times ranging from 10 to 32 min in 0.6 M solution. Chemical oxidation of the...

Nigeria's crude oil, natural gas and proven coal reserves are estimated to be 16 × 109 barrels, 3 × 1012m3 and 3.67 × 108mt, respectively. At present, nearly 80, 15.4, 3.5, and 1.1% of Nigeria's energy demands are derived from crude oil, natural gas, hydropower, and coal, respectively. At the...

Measurements of anodic film thicknesses and their total hemispherical thermal emittance for various current densities (0.55–3.85 ampere/dm2), anodizing times (1–20 min), and oxalic acid concentrations (1–6 wt.%) show a linear relationship between the film thickness and the total...

An accurate set of measurements is presented of solar absorptance (αs) for wavelengths (0.3–2.0 μm) and total hemispherical thermal emittance (εh) for i.r. wavelengths (3–30 μm) of some building elements. The αs values vary from 0.19 to 0.93 ± 0.02, depending upon the nature, colour...