Important research over the past few decades has illustrated that indoor air pollution and indoor smoke from solid fuel poses important health risks in developing countries. Unfortunately, affordable and effective interventions for reducing these risks are limited. This may be because in designing new interventions, the complexities of household energy use and exposure have been often overlooked, and there is a lack of infrastructure to support technological innovations, marketing and dissemination, and maintenance. Even less is known about combinations of technologies that may be used in a household and the factors that motivate the households to adopt them. (more…)
Exposure to indoor air pollution from the combustion of solid fuels has been implicated, with varying degrees of evidence, as a ...
Exposure to air pollutants and air pollution problem are very high in indoor environments in developing countries. Smith has es ...
Reducing exposure to indoor air pollution from household energy use can be achieved through interventions in of the following a ...
Indoor air quality (IAQ) research deals with the presence, levels, health effects, and control of physical, chemical, and biologica ...
In terms of aggregate health effects, household solid fuel use is currently the most important source of indoor air pollution i ...
Reducing exposure to indoor air pollution from household energy use can be achieved through interventions in of the following areas:
* Emissions source and energy technology (fuel– stove combination).
* Housing design and ventilation.
* Behavior and time–activity budget. (more…)
Important research over the past few decades has illustrated that indoor air pollution and indoor smoke from solid fuel poses i ...
Indoor air quality (IAQ) research deals with the presence, levels, health effects, and control of physical, chemical, and biologica ...
Exposure to air pollutants and air pollution problem are very high in indoor environments in developing countries. Smith has es ...
Lack of access to cleaner energy and the negative outwardnesses associated with energy consumption tend to cycle of poverty for ...
Coal is still used to a small extent for home heating and cooking. In the homes of more affluent nations, coal is used for recreati ...
Transportation is another sector that has increased its relative share of primary energy use. This sector has serious concerns as it is a significant source of CO2 emissions and other airborne pollutants, and it is almost totally based on oil as its energy source. An important aspect of future changes in transportation depends on what happens to the available oil resources, production and prices. At present, 95% of all energy for transportation comes from oil. (more…)
Under both former President Bush and new President Obama, the U.S. government has vowed to reduce reliance on imported oil. The ...
Global energy consumption in the last half century has increased very rapidly and is expected to continue to grow over the next ...
From prehistory until the Industrial Revolution, most energy sources used by humans were localized (i.e., available within 5–10 mil ...
Do we have the resources? Rudolf Diesel developed the diesel engine which ran on biodiesel vegetable oil in the late 1800s. At the ...
One study that does address the peak-oil scenario directly is a 2005 report conducted for the National Energy Technology Labora ...
Global energy consumption in the last half century has increased very rapidly and is expected to continue to grow over the next 50 years. However, we expect to see significant differences between the last 50 years and the next. The past increase was stimulated by relatively “cheap” fossil fuels and increased rates of industrialization in North America, Europe, and Japan; yet while energy consumption in these countries continues to increase, additional factors are making the picture for the next 50 years more complex. These additional complicating factors include the very rapid increase fuel economy in energy use in China and India (countries representing about a third of the world’s population); the expected depletion of oil resources in the not-too-distant future; and the effect of human activities on global climate change. (more…)
The relationship of gross national product per capita to energy consumption per capita for most countries of the world correlat ...
The long-term prospects for the U.K. economy are inevitably uncertain, and the most recent Department of Energy long-term proje ...
Transportation is another sector that has increased its relative share of primary energy use. This sector has serious concerns ...
The development of the ‘‘new’’ wind and solar technologies is of great importance for the future contribution of RESs to energy sup ...
To determine the effects of past climate trends on global energy consumption, the econometric equations providing the degree day el ...
The long-term prospects for the U.K. economy are inevitably uncertain, and the most recent Department of Energy long-term projection puts forward three scenarios for the next 30 years with GDP growth rates of roughly 2.5, 1.5 and 0.5% p.a. The highest value corresponds to slightly less than the 1948 - 72 average, the central value is close to the long-run average over the last 80 years, and the lowest figure is similar to the performance during the current recession since 1973. (more…)
Following the recent completion of three nuclear power plants, there is now some 9.6 GW of nuclear capacity in the United Kingd ...
Global energy consumption in the last half century has increased very rapidly and is expected to continue to grow over the next ...
Most major oil and gas firms engage in both upstream (i.e., hydrocarbon exploration and production) and downstream (i.e., hydro ...
Energy is consumed by various segments of the economy, including households, commercial establishments, manufacturing enterpris ...
World energy use has increased steadily over the past several decades. Much of the growth in world energy consumption has been ...
Following the recent completion of three nuclear power plants, there is now some 9.6 GW of nuclear capacity in the United Kingdom. The nuclear share of electrical output, which has stood at around 13% for many years, should rise to around 20% when this capacity is in full operation. A further two reactors are currently under construction which will increase the British nuclear capacity to more than 12 GW by the late 1980s, which could bring the nuclear share of electrical output to around 25%. (more…)
Geographers researching the development of nuclear power have shifted emphasis from commercialization, cost, risk, public acceptanc ...
The long-term prospects for the U.K. economy are inevitably uncertain, and the most recent Department of Energy long-term proje ...
Nuclear fission and fusion Research and Development continues to account for nearly half of the total spending by IEA countries, al ...
Sir Arthur Eddington’s general address on subatomic energy at the 1930 World Power Conference in Berlin stirred the imagination of ...
For years it was out of desperation that observers have advised and viewed of American energy policy and geopolitical risks regardi ...
Certain materials, generally metal oxides, can sustain the unassisted photo-electrolysis of water into H2 and O2. The energy contained in the photons that are absorbed by these materials can in many cases be efficiently converted into energy stored into the chemical fuels produced by the photo-electrolysis system. However, these materials have optical absorption thresholds (band gaps) that are too large to permit effective absorption of the visible and infrared portions of the solar spectrum, thereby wasting a large fraction of the incident solar energy and yielding overall energy conversion efficiencies of o 1%. Modification of metal oxide materials has been claimed to be much more promising, with a modified TiO 2 photo-anode yielding 8% efficiency in the photo-assisted splitting of water into H2 and O2 . (more…)
Several molecular systems have been constructed that mimic various aspects of photosynthesis. Two of these utilize molecular system ...
The basic processes that occur in such a system are well understood. The semiconductor electrode efficiently absorbs light, produci ...
The issues of hydrogen storage run through the hydrogen production, hydrogen transport, supply and demand for end use of hydrog ...
Hydrogen has many applications when it comes to fuel. It can be used both in internal combustion engines and hydrogen fuel cells. ...
All of today’s hydrogen conversion products, demonstration models, and prototypes possess some deficiencies; they cannot yet pr ...
One of the most important aerodynamic effects on energy consumption required to keep a body moving through a fluid is the aerodynamic drag force. The drag must be overcome by the thrust of a propulsion mechanism, which in turn is consuming energy. Everything else being equal, the higher the drag, the more energy is consumed. Therefore, for energy efficiency, bodies moving through a fluid should be low drag bodies. To understand how to obtain low drag, we have to first understand the nature of drag, and what really causes it. (more…)
The next time you hear an airplane flying overhead, look up, and pause for a moment. What you see is a machine that is heavier than ...
Plate tectonics is conceptually simple. It treats Earth’s outer shell as made up of approximately 15 rigid plates, about 100 km thi ...
The most fundamental process from an energy systems standpoint is heat transfer to (or from) a working fluid. This unit operation t ...
Mixing is a process where two or more liquids or gas phase components are brought together and combined to form a uniform compositi ...
Hydraulic turbines have two main classifications: impulse and reaction. The impulse turbine generally uses the velocity of the wate ...
Indoor air quality (IAQ) research deals with the presence, levels, health effects, and control of physical, chemical, and biological factors in indoor environments, including homes, workplaces, and vehicles. IAQ research in industrialized countries has examined hundreds of specific factors (e.g., temperature, various chemicals, and mold), sources of pollution environment (e.g., environmental tobacco smoke, occupational factors, consumer cleaning products, and moisture), and control technologies (e.g., ventilation). (more…)
Important research over the past few decades has illustrated that indoor air pollution and indoor smoke from solid fuel poses i ...
In terms of aggregate health effects, household solid fuel use is currently the most important source of indoor air pollution i ...
Exposure to air pollutants and air pollution problem are very high in indoor environments in developing countries. Smith has es ...
Reducing exposure to indoor air pollution from household energy use can be achieved through interventions in of the following a ...
Exposure to indoor air pollution from the combustion of solid fuels has been implicated, with varying degrees of evidence, as a ...
Fiber optic systems have many advantages on the basis of the communication systems technology compare to metallic media communication. These advantages include lower interference, small signal attenuation and bandwidth characteristics. In addition, relatively small cross-section of the fiber optic cable from a substantial growth in capacity in the existing lines is replaced. Properties of optical fibers can be classified as linear and nonlinear. Non-linear properties are influenced by parameters such as bit rate, channel spacing, and the level of performance. (more…)
There are literally thousands of uses for lasers. One of the largest applications is telecommunications—sending a signal throug ...
Several passive heating systems, if provided with proper ventilation, can ensure to provide cooling. Passive heating and cooling fo ...
Most discussions of energy use in paper production and papermaking are confusing because of a failure to define exactly what is mea ...
More than 48% of the raw material fiber used for paper production (chemical pulp or mechanical pulp) in the United States in 2002 w ...
Different lasers use different materials as the active medium. The medium can be either solid, liquid, or gas, and there are ad ...