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 ...
Formaldehyde is an essential chemical substance made use of widely by manufacturers’ of building and construction materials and household/residence products. It’s also a by-product of coal combustion as well as specific other organic and natural processes. Formaldehyde is available in substantially large levels of concentrations either inside or outside. Formaldehyde vapors tend to be odorless unless of course in higher concentrations. (more…)
Using blankets the width of your wall studs, insert the blanket between the studs and staple to the studs. (The job is easier i ...
It is easier and less costly to fit insulation in a new home than to retrofit. However, many existing houses have little or no insu ...
You know where to insulate, but there’s still one more thing you need to know about—vapor barriers. Well-insulated attics, craw ...
You must perform some sort of tour and visit of your home and property to find out exactly where it may need in applying insulation ...
Many home owners want to use brick veneer exterior walls for their houses. The brick is usually the automatic choice for outd ...
There are many efforts to make building more comfortable and to reduce the carbon dioxide emissions from buildings. For many years we tried to increase wall thickness of the wall insulation and roof insulation and adding the bottom insulation.
This seems logical, but I recently attended a seminar in where a speaker tried to make a comparison of as opposed to two major areas of new construction. These building were build year apart and built insulation levels in the store later far exceeded the first branch. Although the shops were of similar size, has a similar level of glass and skylights, the shop recently built, although it improved R-values (please refer to insulation R-Value chart), 43% costs warmer than the last. (more…)
It is easier and less costly to fit insulation in a new home than to retrofit. However, many existing houses have little or no insu ...
Imprinted on every batt or blanket of insulation or on every bag of loose insulation is its R-Value. The higher Insulation R-Value, ...
You must perform some sort of tour and visit of your home and property to find out exactly where it may need in applying insulation ...
If your house has no attic (most flat-roof houses don’t), chances are there’s a cockloft, a space between roof and ceiling, at ...
You know where to insulate, but there’s still one more thing you need to know about—vapor barriers. Well-insulated attics, craw ...
Energy labeling is a policy tool that informs consumers about the energy performance of appliances and thereby encourages them to purchase appliances that provide the services they need with less energy consumption. In providing information to consumers about equipment energy consumption and operating costs that would otherwise be invisible or unavailable, energy labeling enables consumers to make more balanced and rational purchasing decisions. Energy labels can also help consumers to identify the most efficient products on the market. In effect, energy labeling attempts to provide a market ‘‘pull’’ for more energy-efficient products while simultaneously presenting information that might discourage the purchase of less efficient products. (more…)
It is important to remember that labeling and MEPS programs aim to influence the selection of products by consumers at the poin ...
Endorsement labels indicate that the products carrying the labels belong to the ‘‘most energy-efficient’’ class of products or ...
There are only a few compulsory energy efficiency programs aimed at industrial facilities. It is only recently that the EU introduc ...
As the need for energy efficiency becomes more pronounced, the drive toward efficiency in the commercial sector will be impeded by ...
As energy prices increase, industries are more and more aware that energy is an expensive commodity that has to be used effic ...
It is important to remember that labeling and MEPS programs aim to influence the selection of products by consumers at the point of sale by making higher efficiency units more attractive (through labeling) or by making less efficient ones unavailable (through MEPS). Labeling or MEPS cannot be expected to have any significant ongoing influence on consumers’ use of products once they have been purchased and installed. (more…)
Energy labeling is a policy tool that informs consumers about the energy performance of appliances and thereby encourages them ...
Endorsement labels indicate that the products carrying the labels belong to the ‘‘most energy-efficient’’ class of products or ...
Another possible non-market-failure explanation for the energy efficiency gap is associated with the fact that even if a given tech ...
For processes that produce multiple products, energy and emission burdens have to be allocated to individual products. ISO 14040 ad ...
This liberalization is aimed at introducing supply competition in the electricity and gas price markets. Competition is supposed to ...
Endorsement labels indicate that the products carrying the labels belong to the ‘‘most energy-efficient’’ class of products or meet a predetermined standard or eligibility criteria. These labels generally consist of a logo or mark that indicates the products have met the standard and generally contains little or no comparative energy efficiency information (although this may be available through lists of endorsed products). These labels merely inform consumers that the products meet the required standard. Criteria for some schemes are updated on a regular basis; therefore, these labels may carry the year of qualification. Endorsement labeling programs are mostly of a voluntary nature. (more…)
Energy labeling is a policy tool that informs consumers about the energy performance of appliances and thereby encourages them ...
It is important to remember that labeling and MEPS programs aim to influence the selection of products by consumers at the poin ...
Interest in rating the real-life energy performance of buildings has increased in recent years, and the real life efficiency perfor ...
10 benefits of Solar Energy: No 1 Solar energy is renewable. We never have to worry about running out of sunlight or usi ...
A variety of information programs exist in the major automobile markets to assist potential purchasers of new cars in comparing fue ...
A variety of information programs exist in the major automobile markets to assist potential purchasers of new cars in comparing fuel economy characteristics (and other attributes) among competing vehicles. However, there is no evidence that the existence of such systems plays a significant role in consumer choice of vehicles. For example, in 1995, the light duty fleets in the two European countries with fuel economy labeling systems (Sweden and the United Kingdom) were the least efficient in Europe (according to International Energy Agency data). (more…)
A number of countries have vehicle tax incentives programs designed to reward purchasers and owners of alternative fuel-efficient v ...
Because different studies have different system boundaries and parametric assumptions, the studies described in Section 7 resulted ...
Throughout the British energy crisis there were some grounds evident that more drivers drove more slowly to conserve their vehi ...
We know of no studies that have examined vehicle taxation incentives programs elsewhere in the world, but it seems likely that ...
This latter form of new car taxes can actually serve as an impediment to higher fuel economy to the extent that increased energ ...
Cost–benefit analysis (CBA), also known as benefit–cost analysis, is rooted in applied welfare economics. It is a way of organizing and analyzing data as an aid to thinking. It provides a set of procedures for comparing benefits and costs and is traditionally associated with government intervention and with the evaluation of government action and government projects. The underlying rationale for CBA is rational choice; that is, a rational agent will weigh the costs and benefits of any proposed activity and will only undertake the activity if the benefits exceed the costs. (more…)
The first step in categorizing potential benefits and costs is determining the relevant scope of the analysis. We have concluded th ...
Energy efficiency is defined here to mean energy services provided per unit of energy input (for example, gallons of water hea ...
ISO document 14040 identifies four areas for using life cycle analysis (LCA) results: (1) identifying opportunities to improve ...
Recently, attention to energy efficiency has been gaining momentum. The attention given by policy maker is mainly due to concer ...
The question has long been not whether or not to reduce air pollution, but by how much and by what means. Since the extent of t ...
Global warming, CO2 emissions, deforestation and loss of biodiversity on the planet are just side effects of our carbon footprint. Like hundreds of organizations to develop initiatives to reduce the effects of human energy consumption, others have simply chosen to ignore the movement. If you want to help Mother Earth, there are ten top list ways to waste of energy that you can avoid: (more…)
Heating and Cooling systems can be a major contributor to a homes energy costs and associated greenhouse gas emissions. For som ...
Spring is here, which means that the summer heat is already here in Arizona. We all know how essential having an effective air ...
Nowadays, a lot more people are increasingly aware of the amount of energy they consumed everyday and what effect it was having ...
Ceiling fans are a popular room addition; comfort can be easily obtained with a flip of a switch. An immediate cooling breeze is cr ...
Don't sweat it out when you don't have to. Got your A/C running and still feel warm? Here are some tips that will help keep you ...
Interest in rating the real-life energy performance of buildings has increased in recent years, and the real life efficiency performance rating of buildings is important for any sustainable energy future. (more…)
As the need for energy efficiency becomes more pronounced, the drive toward efficiency in the commercial sector will be impeded by ...
Energy performance ratings tell what the energy performance of a building is, but if the energy performance of a building is to be ...
Current forecasts call for solid growth in world energy use over the next 20 years, potentially increasing 60% above current energy ...
There are only a few compulsory energy efficiency programs aimed at industrial facilities. It is only recently that the EU introduc ...
The amount of energy consumed in the commercial sector often must be estimated as a fraction of energy use in the combined resident ...