Solar dryers are special structures that enhance the drying power of the sun and protect the agricultural product from dust, dirt, and insects. Table below shows a block diagram of an active solar drying system, consisting of solar air collectors, a drying unit or chamber, and an air handling unit. An active solar drying system can accommodate the use of a backup heat source when there in not enough solar heat available. (more…)
Drying is one of the most important post harvest steps. It enhances the storage life of the crop products, minimizes losses during ...
Solar distillation is the process in which solar heat is used to purify water from an impure water source by evaporation and conden ...
Since the 1980s, no large-capacity solar distillation plants have been built, mainly for the following reasons: Large installation ...
Active solar hot water systems water are usable with air, liquid, vapor or liquid collector fluid or gas to liquid process. Hot ...
The U.S. Department of Energy has determined that about 80% of residential energy use is consumed in single-family homes, while 15% ...
Microtechnology-Based Energy and Chemical Systems will most likely employ combustion for driving processes such as vapor generation and vapor barrier, endothermic chemical reactions, and (most notably) fuel reforming. Both fuel reformers and combustors will be of a miniature design relying on embedded catalysts for promoting chemical reactions at moderate temperatures (350–7501C). Many potential configurations exist depending on the application and constraints on the design. Microchannel arrays are a potential configuration; mesh and post architecture is another to achieve the desired surface area and small diffusional lengths necessary. (more…)
Fuel cells are direct energy conversion devices that combine two reactants to produce electrical power. The reactants are typic ...
Mixing is a process where two or more liquids or gas phase components are brought together and combined to form a uniform compositi ...
Heat-actuated heat pumps are cooling systems requiring no electricity for operation. Rather, a heat source is used, avoiding the ne ...
Many characteristics of traditional engines make them attractive for use in power generation and propulsion technology. They tend t ...
The most fundamental process from an energy systems standpoint is heat transfer to (or from) a working fluid. This unit operation t ...
Mieres campus yesterday welcomed the conclusion of the technical conference on geothermal energy as alternative renewable energy. Experts call for use the geotermiaEl event, which was attended by a large audience, was held at the hall and was attended by numerous experts. The presentation began with a presentation from the Director General of Mines and Energy, Isaac Pola. (more…)
The Geologists Association president advocates the use of geothermal energy by its high durability and low maintenance. Besides a r ...
According to the German standard VDI 4640 geothermal energy is stored energy as heat beneath the Earth's solid surface, encompa ...
"Spain has great potential but lack geothermal legislation and investment." Besides being clean, renewable and friendly, easily man ...
Although technology change (usually involving an improvement in energy efficiency) is not inherently a geographic process, it does ...
In Europe, modern renewable energy sources technologies were explored thoroughly for the first time after the oil embargo/ price cr ...
Heat has a enormous influence in our daily lives. Heat quantity exposed in our live has related to the foods we eat, the temperature changes of our house and buildings, and clothes we wear. Heat can be transferred between different objects with different temperature. But do you know that heat is different from temperature? (more…)
The comfort heating system in a building brings itself to the concept of complete heating operating unit. In order to work prop ...
As a result of high and rising costs of fossil fuels and fossil fuels affect global environment concern , and by the reduction ...
In these regenerators the heat energy transfer between primary and secondary fluid is primarily by radiation and its installati ...
Active solar hot water systems water are usable with air, liquid, vapor or liquid collector fluid or gas to liquid process. Hot ...
Energy exists in many forms. Some of energy forms are simple to use and identify as energy. But other forms of energy can not b ...
Heat-actuated heat pumps are cooling systems requiring no electricity for operation. Rather, a heat source is used, avoiding the need for batteries. This consideration is critical for portable applications because on a weight basis, a stored liquid fuel has anywhere from 35 to 300 times the energy content of batteries, depending on the battery technology considered. Thus, although the simple solution of combining an electric motor, a battery package, and a vapor compression refrigerator may sound appealing, it actually suffers a severe volume and weight disadvantage when compared with a heat-actuated system. (more…)
Separation is a unit operation used in absorption heat pumps and chemical processing applications such as solvent extraction and pr ...
Many small-scale energy systems require effective miniaturized pumps and expanders. These devices are responsible for conveying ...
Micro technology can be employed to produce miniaturized refrigeration and cryocooling systems. Although process intensificat ...
Numerous other parts are needed for a complete fuel cell engine suitable for motor vehicles. These auxiliary components include man ...
The idea of using an absorption fluid as a refrigerant carrier derived from the drawback of VCR (vapor–compression refrigeration) s ...