The technology segment analysis has been carried out on the global and regional level. The overall thermal energy storage market has been bifurcated into sensible heat, latent heat, and thermochemical storage technology segments. Primary end-user applications of thermal energy storage systems identified in this market study include commercial and industrial, utilities, and residential applications.
Source: www.marketwatch.com
Concepts NREC has completed its design and development of an integrated high speed axial turbine and permanent magnet generator. The Turbine –Generator Unit (TGU) is ideal for ORC applications for its compactness, reliability, and versatility. The 20,000 rpm TGU does not use a shaft seal or gearbox and the generator is evaporatively cooled using the ORC working fluid. The TGU is designed with the intent of having the same turbine housing and generator used with a range of operating ORC fluid operating pressures and temperatures to enable its wide spread use in a variety of ORC heat recovery applications. The rotor and nozzle stators are changed to aerodynamically optimize the performance of the turbine at different ORC fluid operating conditions and flow rates. The output voltage of the generator can range from 300 to 480 VAC and at 50 hz and 60 hz. This facilitates its use in waste heat recovery applications throughout the world. This technical paper will review the mechanical and electrical design features of the turbine-generator unit.
Source: www.slideshare.net
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A new technology is on the horizon that could make the burning of gas, oil and wood to heat homes obsolete: A new company called Project Exergy is developing a way to capture the waste heat from computing to keep our houses warm.
Orsini and his collaborators have created a prototype computer, called Henry — a “liquid-cooled, high-performance computer” that makes significantly more heat than a typical computer. Henry is slightly bigger than a normal tower PC and made only from off-the-shelf parts. “There is no Star Trek technology in this thing,” Orsini says. “It’s made out of things that you could go buy from the computer store today.”
There is, however, an additional component that works with the computer: a thermal storage tank. This tank is filled with phase change materials that hold significantly more heat than, for example, a typical hot-water heater, Orsini says.
Phase change materials are materials that store and release latent heat. Typically, they store heat by undergoing a solid-liquid phase transformation. Orsini was able to store heated water in Henry’s thermal storage tanks at 200 degrees Fahrenheit
Source: www.pri.org
Siemens has commissioned its Clean Energy Centre, a new burner test center for gas turbines in Ludwigsfelde near Berlin.
Source: www.powerengineeringint.com
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A study at the University West (Högskolan Väst) investigated the shape and number of cracks in gas turbine coating and found that not all cracks are bad.
The surface coating used on gas turbines to increase lifespan, consists of two layers – one of metal to protect against oxidation and corrosion , and a ceramic one for thermal insulation. The structure of the coating varies, with pores and cracks of different sizes, which determine the efficiency of the thermal insulation and the length of the coating life-span. – See more at: http://www.materialsforengineering.co.uk/engineering-materials-news/cracking-the-code-for-surface-coating-of-gas-turbines/73786/?__scoop_post=97af0600-b454-11e4-93c7-842b2b775358&__scoop_topic=1472349#__scoop_post=97af0600-b454-11e4-93c7-842b2b775358&__scoop_topic=1472349
Source: www.materialsforengineering.co.uk
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In Singapore, a group of researchers at the Lloyd’s Register Global Technology Center, and their partners at the Institute for High Performance Computing, are working to help bring about a tool that could help develop a cost competitive FOWT design. So far there is a significant amount of data gathered on fixed wind turbines. Tools such as the Fatigue, Aerodynamics, Structures and Turbulence (FAST) Code have provided a means to simulate loads and predict performance. The Blade Element Momentum (BEM) method is the basis for most of the wind turbine analysis software currently used in the market. However, its theory is based on the assumption that the rotor plane is normal to the wind direction. Taking a step in a new direction, these researchers are assessing FOWT characteristics by using higher-fidelity prediction models based on computational fluid dynamics (CFD) that can account for the six degrees of movement of the floating offshore wind turbine.
Source: www.windpowerengineering.com
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A proposal for a new design
Due to its unique characteristics, wind speed can be gradually recovered to the inflow velocity, Vo, after passing over an object. Now assume the diameter of the wind rotor is infinitely large and the blades are located relatively low. After the wind passes over the upwind blades, the wind speed recovers gradually to inflow velocity. When the wind arrives the downwind side, the blades there encounter the same velocity the upwind blades encountered earlier. As displayed in Extracting power from a VAWT , the blades at most positions in the first and fourth quadrants extract the greatest power. If we separate the rotor at line A-A and extend the rotor to A’-A’, we now have two half circles connected by a rectangle (A design for the Super Turbine) and all the blades in the A-A’ sections will extract the biggest power. This is the basic principle of the super turbine. It is based on real time, active-pitch technique for vertical axis wind turbines.
Source: www.windpowerengineering.com
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