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 total installed geothermal power generating capacity in the world is approximately 9000 MWe from 21 countries, with the United States leading at nearly 3000 MWe and The Philippines with nearly 2000 MWe (Table II). Other major countries are Italy, Mexico, Indonesia, Japan, and New Zealand, with between 400 and 800 MWe each. (more…)
In most countries, geothermal resources are classified as natural resources belonging to the government. Since the 1980s, there has ...
Geothermal wells need to undergo a test program before they are used. This is so that the baseline conditions of both the wells and ...
Several passive heating systems, if provided with proper ventilation, can ensure to provide cooling. Passive heating and cooling fo ...
Steam is a great heat transfer medium simply because it's easy to move inside your system. Steam heating is known to have a ver ...
Steam heating is an absolutely wonderful method to heat your home. Steam heat is always driven by steam produced from water in ...
The most fundamental process from an energy systems standpoint is heat transfer to (or from) a working fluid. This unit operation typically occurs in small channels, the characteristic diameter of which is less than 1 mm. Other heat transfer exchanger configurations, such as fluid flowing through a network of posts or through a mesh, are also possible. Specific examples of this fundamental unit operation include phase change occurring in boilers (modular steam boiler), evaporators, and condensers. (more…)
Mixing is a process where two or more liquids or gas phase components are brought together and combined to form a uniform compositi ...
Micro technology can be employed to produce miniaturized refrigeration and cryocooling systems. Although process intensificat ...
Separation is a unit operation used in absorption heat pumps and chemical processing applications such as solvent extraction and pr ...
Microtechnology-Based Energy and Chemical Systems will most likely employ combustion for driving processes such as vapor generation ...
Many small-scale energy systems require effective miniaturized pumps and expanders. These devices are responsible for conveying ...
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 ...
Steam is a great heat transfer medium simply because it’s easy to move inside your system. Steam heating is known to have a very high heat retention capacity. The heat capacity of steam is much bigger compare than that of water. Steam systems are frequently working on very low pressure and generally below 220F. (more…)
Steam heating is an absolutely wonderful method to heat your home. Steam heat is always driven by steam produced from water in ...
Loos presented its latest technology in steam boilers: the Universal U-MB. The innovative high-volume boiler water vapor to yie ...
Visual inspection is usually good enough for under roof insulation that is accessible, as in boiler rooms, pipe chases, and ste ...
Insulation is what keeps the heat energy of a boiler system from leaking out of the system on its way to the end users. Inspect ...
The total installed geothermal power generating capacity in the world is approximately 9000 MWe from 21 countries, with the United ...
Numerous other parts are needed for a complete fuel cell engine suitable for motor vehicles. These auxiliary components include many familiar pieces of equipment, such as blowers, pumps, heat exchangers, sensors, and controls. However, fuel cells have specialized performance requirements, so substantial engineering effort is needed to develop auxiliary systems suitable for fuel cell vehicles. (more…)
It is progress in the development of hydrogen-air PEM stacks that has made fuel cells a contender for powering automobiles of the f ...
A fuel cell is an electrochemical device that directly converts a fuel to electricity by means of reactions on the surfaces of ...
Fuel cells are typically classified according to type of electrolyte. While many varieties of fuel cells have been demonstrated ...
Polymer Electrolyte Fuel Cells have high-power density, rapid startup, and low-temperature operation (around 80 to 120 C), and ...
Heat-actuated heat pumps are cooling systems requiring no electricity for operation. Rather, a heat source is used, avoiding the ne ...
As a result of high and rising costs of fossil fuels and fossil fuels affect global environment concern , and by the reduction of greenhouse effect gases from burning causes (Kyoto Protocol), the heat recovery gain importance growing. A heat exchanger absorbs a significant portion of the heat energy of the gases generated during combustion of solid fuel, liquid and gas in the smelting process, heating, roasting, and drying. (more…)
In these regenerators the heat energy transfer between primary and secondary fluid is primarily by radiation and its installati ...
Heat has a enormous influence in our daily lives. Heat quantity exposed in our live has related to the foods we eat, the temper ...
The product gas can be burned in boilers to generate heat and raise steam, in internal combustion engines to generate electricity a ...
The leading automotive brands are being focused to produce electric vehicles because they believe they represent a harmony to the e ...
Drying is one of the most important post harvest steps. It enhances the storage life of the crop products, minimizes losses during ...
Steam heating is an absolutely wonderful method to heat your home. Steam heat is always driven by steam produced from water in a pot of natural gas, oil and electricity. Then it draws through pipes and radiators and heat exchangers to heat your house or residential. Boiler is used to generate steam from water. When the water boils, steam rises through pipes to radiators to heat. Then, the hot radiators play its role to warm the house. (more…)
Steam is a great heat transfer medium simply because it's easy to move inside your system. Steam heating is known to have a ver ...
Loos presented its latest technology in steam boilers: the Universal U-MB. The innovative high-volume boiler water vapor to yie ...
Visual inspection is usually good enough for under roof insulation that is accessible, as in boiler rooms, pipe chases, and ste ...
Active solar hot water systems water are usable with air, liquid, vapor or liquid collector fluid or gas to liquid process. Hot ...
Several passive heating systems, if provided with proper ventilation, can ensure to provide cooling. Passive heating and cooling fo ...
Micro technology can be employed to produce miniaturized refrigeration and cryocooling systems. Although process intensification is typically the route used for miniaturization, micro technology can also be used for reducing the size of mechanical components that are necessary for operation. For example, to create a small-scale vapor compression refrigerator, (more…)
Many small-scale energy systems require effective miniaturized pumps and expanders. These devices are responsible for conveying ...
The most fundamental process from an energy systems standpoint is heat transfer to (or from) a working fluid. This unit operation t ...
Many characteristics of traditional engines make them attractive for use in power generation and propulsion technology. They tend t ...
Heat-actuated heat pumps are cooling systems requiring no electricity for operation. Rather, a heat source is used, avoiding the ne ...
Microtechnology-Based Energy and Chemical Systems will most likely employ combustion for driving processes such as vapor generation ...
Separation is a unit operation used in absorption heat pumps and chemical processing applications such as solvent extraction and product separations. A typical separation process in a heat pump application involves the desorption of ammonia from a water–ammonia solution. Although a number of configurations have been studied for this process at the macroscale, most are based on gravity and have relatively low rates of desorption. (more…)
Heat-actuated heat pumps are cooling systems requiring no electricity for operation. Rather, a heat source is used, avoiding the ne ...
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 ...
Microtechnology-Based Energy and Chemical Systems will most likely employ combustion for driving processes such as vapor generation ...
So-called thin-film photovoltaic devices are usually based on mixtures of elements other than silicon — most notably copper ind ...