The idea of using an absorption fluid as a refrigerant carrier derived from the drawback of VCR (vapor–compression refrigeration) systems that the gas compression requires a high work input. A pump that requires practically no work to increase the pressure in the refrigeration system replaces the complicated and work-consuming compressor. There are two major advantages of absorption refrigeration systems (ARSs) compared with VCRs (vapor–compression refrigeration): No CFCs or HCFCs are used as refrigerants, and they use heat from different sources, such as combustion, industrial processes, waste heat (an economical solution for recovery), or solar heat. (more…)
Heat-actuated heat pumps are cooling systems requiring no electricity for operation. Rather, a heat source is used, avoiding the ne ...
The term cryogenics derives from the Greek kryos, for icy cold. The upper limit that characterizes the cryogenic region of the temp ...
Separation is a unit operation used in absorption heat pumps and chemical processing applications such as solvent extraction and pr ...
Active solar hot water systems water are usable with air, liquid, vapor or liquid collector fluid or gas to liquid process. Hot ...
Micro technology can be employed to produce miniaturized refrigeration and cryocooling systems. Although process intensificat ...
The outlook for reductions in future energy use is necessarily based on the potential for increased technological and operational efficiencies. In this section, the outlook for such improvements in large commercial aircraft over the next quarter century is examined.
Engine efficiencies may be improved by between 10 and 30% with further emphasis on moving more mass through engines that operate at higher temperatures and higher pressures. A continuation of the historical trend would lead to a 10% increase in L/D by 2025, and further improvements in the reduction of parasitic drag may extend these savings to perhaps 25%. However, the technologies associated with these improvements have weight and noise constraints that may make their use difficult. (more…)
Fuel efficiency gains due to technological and operational change can mitigate the influence of growth on total emissions. Incr ...
Energy performance ratings tell what the energy performance of a building is, but if the energy performance of a building is to be ...
The growth in air transportation volume has important global energy sustainable development associated with the potential for ...
On a bright, blue morning at Hamburg Airport, the aeronautics industry came a giant step closer to changing the future path of ...
High-speed maglev technology offers four main advantages: non-contact operation; low-mass vehicles (on a per seat basis, maglev veh ...
A jacket, a denim jacket, a skirt, a backpack and a handbag are the five prototypes in the design of which has been integrated circuit for obtaining and storing solar energy for lighting applications or upload personal and mobile.
The Clothing Technology Centre, located in Talavera de la Reina, today unveiled the designs in the manufacture of students have also worked workshop on renewable energy use from the local Economic Development Initiative of Talavera (IPET). (more…)
Nowadays, solar power have become more affordable. That makes it a viable alternative energy option for homeowners who would li ...
In today's tough economic times and with the increasing prices of gas and oil, finding alternative sources of energy should be ...
The Solar City approach originally emerged from a new generation of International Energy Agency (IEA) energy research and developme ...
In the mid-1880s, Charles Fritts built the first solar cell formed by selenium coated with a thin layer of gold and with an ene ...
In the absence of useful and established patterns of practice, a search is under way for new means of reconciling local government’ ...
The U.S. Department of Energy has determined that about 80% of residential energy use is consumed in single-family homes, while 15% is consumed in multifamily dwellings such as apartments, and 5% is consumed in mobile homes.
More than half of the energy used for heating in building and home for single-family homes is natural gas, about one-fourth is electricity, (more…)
Here, the sensitivity of energy demand to climate is measured two ways. The first method uses elasticities that provide simple summ ...
Based on estimates of the U.S. Department of Energy, the energy used in homes accounts for 20% of all the energy consumption in the ...
Heating and Cooling systems can be a major contributor to a homes energy costs and associated greenhouse gas emissions. For som ...
Several passive heating systems, if provided with proper ventilation, can ensure to provide cooling. Passive heating and cooling fo ...
The energy that people use every day comes from many different sources. The resources are divided into two main groups: renewa ...
The Geologists Association president advocates the use of geothermal energy by its high durability and low maintenance. Besides a remarkable performance.
The president of the Association of Geologists, Luis Eugenio Suarez said, during the annual dinner of this organization held yesterday, (more…)
Mieres campus yesterday welcomed the conclusion of the technical conference on geothermal energy as alternative renewable energy. E ...
According to the German standard VDI 4640 geothermal energy is stored energy as heat beneath the Earth's solid surface, encompa ...
Several passive heating systems, if provided with proper ventilation, can ensure to provide cooling. Passive heating and cooling fo ...
"Spain has great potential but lack geothermal legislation and investment." Besides being clean, renewable and friendly, easily man ...
Geothermal energy is energy created by the heat of the Earth. Under the Earth’s crust lies a layer of thick, hot rock with occa ...
Based on estimates of the U.S. Department of Energy, the energy used in homes accounts for 20% of all the energy consumption in the United States. The ability to control the indoor temperature is one of the most important achievements of modern technology. (more…)
Want state of the art LED lighting for your home? If so then this article will help to teach you about the many benefits to be gain ...
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 ...
These days we have two main concerns in the world of business and finance. First the greenhouse global warming and second the finan ...
Nowadays, a lot more people are increasingly aware of the amount of energy they consumed everyday and what effect it was having ...
It is a reasonable and sensible action to tighten our belts and cut spending as living cost are climbing nowadays. We have to m ...
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 ...
In 2006, total world wind generating electricity capacity was around 72,000 MW, producing some 160 terawatt-hours (TWh) per year of electricity. As of the end of 2006, the top wind producers were Germany, with 20,622 MW; Spain, with 11,615 MW; and the United States, with 11,575 MW.
Even so, wind accounts for only about 1 percent of the world’s total energy use. (more…)
Designers in China have launched the first wind turbine levitating in the world of permanent magnetic levitation (Maglev) in the Wi ...
In 2001, there were 14,000 small wind turbines for home/domestic use in the United States. The market potential for national an ...
Germany is considered a world leader in wind energy deployment, with electricity production from wind having gone up more than eigh ...
The wind has covered every Sunday morning more than 50 percent of electricity & energy demand. It has also achieved the record high ...
The development of the ‘‘new’’ wind and solar technologies is of great importance for the future contribution of RESs to energy sup ...