There are different types of vehicle propulsion systems and the transportation fuels that have been studied for their potential to power the vehicles. Gasoline, CNG, LNG, LPG, methanol, ethanol, and hydrogen can be used in vehicles equipped with conventional spark-ignition (SI) engines. Interest in developing efficient, low-emission, spark-ignition direct-injection (SIDI) engine technologies has heightened in recent years. (more…)
The combination of well-to-pump results and the energy use and emissions associated with vehicle operation (also called the pum ...
It shows Well-to-Wheels Greenhouse Gas emissions of the 23 vehicle/fuel systems. For each system, the bottom bar represents CO2 ...
The spark-ignition and compression-ignition engine and internal combustion engines technologies that are currently employed in ...
The commercialization prospects for fuel cell vehicles depend not only on their performance and cost, but also on how well th ...
At present, in the United States and worldwide, motor vehicles are fueled almost exclusively by petroleum based gasoline (or re ...
Energy performance ratings tell what the energy performance of a building is, but if the energy performance of a building is to be improved, the causes of lower than desired performance must be understood, and methods of achieving improved performance must be determined. Causes of variation in energy performance among commercial buildings are understood to a degree, but much remains to be learned. (more…)
Current forecasts call for solid growth in world energy use over the next 20 years, potentially increasing 60% above current energy ...
Interest in rating the real-life energy performance of buildings has increased in recent years, and the real life efficiency perfor ...
As the need for energy efficiency becomes more pronounced, the drive toward efficiency in the commercial sector will be impeded by ...
The amount of energy consumed in the commercial sector often must be estimated as a fraction of energy use in the combined resident ...
The outlook for reductions in future energy use is necessarily based on the potential for increased technological and operati ...
The pace of innovations in batteries has not matched the remarkably fast evolution in the development of portable electronic technology. Batteries are widely regarded as the weak point slowing the rapid innovations in portable technology. Chief among consumer complaints are that batteries do not last long enough and that they do not last as long as the manufacturer claims they will. (more…)
After lighting, personal computers (PC) and monitors have the highest energy use in office environments. Studies have shown tha ...
A fuel cell is an electrochemical device that combines hydrogen with oxygen to generate electricity, heat and water to produce. ...
The wind has covered every Sunday morning more than 50 percent of electricity & energy demand. It has also achieved the record high ...
Take a look at the following energy saving ideas and new green products and see how many you can use to save your hard earned c ...
Beginning at the end of the technological change process, research has consistently shown that diffusion of new, economically superior technologies is never instantaneous. A new technology is adopted at first gradually and then with increasing rapidity, until at some point its saturation in the economy is reached. The explanation for this typical path of diffusion that has most relevance for energy conservation investments is related to differences in the characteristics of adopters and potential adopters. This includes differences in the type and vintage of their existing equipment, other elements of the cost structure (such as access to and cost of labor, material, and energy), and their access to technical information. (more…)
There are typically costs of adoption that are not included in simple cost-effectiveness energy calculations. It is by no means cos ...
Many readers may be unfamiliar with the way economists typically view the process of technological change, thus it is useful to fir ...
Recently, attention to energy efficiency has been gaining momentum. The attention given by policy maker is mainly due to concer ...
Energy efficiency is defined here to mean energy services provided per unit of energy input (for example, gallons of water hea ...
Another possible non-market-failure explanation for the energy efficiency gap is associated with the fact that even if a given tech ...