Nanotechnology primer: graphene – properties, uses and applications – Nanowerk

See on Scoop.ite-Manufacturing Additive & Digital technology

Energy

Graphene-based nanomaterials have many promising applications in energy-related areas. Just some recent examples: Graphene improves both energy capacity and charge rate in rechargeable batteries; activated graphene makes superior supercapacitors for energy storage; graphene electrodes may lead to a promising approach for making solar cells that are inexpensive, lightweight and flexible; and multifunctional graphene mats are promising substrates for catalytic systems.These examples highlight the four major energy-related areas where graphene will have an impact: solar cells, supercapacitors, lithium-ion batteries, and catalysis for fuel cells. An excellent review paper (“Chemical Approaches toward Graphene-Based Nanomaterials and their Applications in Energy-Related Areas”) gives a brief overview of the recent research concerning chemical and thermal approaches toward the production of well-defined graphene-based nanomaterials and their applications in energy-related areas. The authors note, however, that before graphene-based nanomaterials and devices find widespread commercial use, two important problems have to be solved: one is the preparation of graphene-based nanomaterials with well-defined structures, and the other is the controllable fabrication of these materials into functional devices.Read more about graphene nanotechnology in energy applications.

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WO2014018677A1 MULTIPLE ORGANIC RANKINE CYCLE SYSTEM AND METHOD

See on Scoop.itHeat energy recovery technology

Systems and methods are provided for the use of systems that recover mechanical power from waste heat energy using multiple working expanders with a common working fluid. The system accepts waste heat energy at different temperatures and utilizes a single closed-loop circuit of organic refrigerant flowing through all expanders in the system where the distribution of heat energy to each of the expanders allocated to permit utilization of up to all available heat energy. In some embodiments, the system maximizes the output of the waste heat energy recovery process. The expanders can be operatively coupled to one or more generators that convert the mechanical energy of the expansion process into electrical energy.

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Finishing Methods for 3D Printed Parts : Modern Machine Shop

See on Scoop.ite-Manufacturing Additive & Digital technology

If additive manufacturing is to account for a respectable share of production in the future, it can’t rely on primitive methods of finishing such as hand sanding. That point has long been apparent to 3D printing contractor RedEye, which recently completed its beta testing of various finishing methods for parts made through fused deposition modeling. Processes including tumbling, vapor smoothing, bead blasting and plating have now been added to its range of services. In place of surfaces with layer lines, these finishing methods can produce a smooth or shiny appearance appropriate to a visible consumer part.
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ElectraTherm Introduces Higher Output Waste Heat to Power Generator – Power Engineering Magazine

See on Scoop.itHeat energy recovery technology

Hot water enters the Green Machine 4020 between 77-116°C (170-240°F) and flow rates between 6.4-22.1 l/s (100-350 gpm), where it heats a working fluid into pressurized vapor. As the vapor expands, it drives ElectraTherm’s patented twin screw power block, which spins an electric generator and produces up to 110kWe. ORC condensing heat can be further utilized to supply 50-55°C water to local heating loads.

See on www.power-eng.com