Skutterudite compounds have been studied as potential thermoelectric materials due to their high thermoelectric efficiency, which makes them attractive candidates for applications in thermoelectric power generation. In this study, the effects of double-filling on the thermoelectric properties of the CexYb0.2−xCo4Sb12 skutterudite material system were investigated through the process of melt spinning and spark plasma sintering (SPS). By replacing Yb with Ce, the carrier concentration was compensated for by the extra electron from Ce donors, leading to optimized electrical conductivity, Seebeck coefficient, and power factor of the CexYb0.2−xCo4Sb12 system. However, at high temperatures, the power factor showed a downturn due to bipolar conduction in the intrinsic conduction regime. The lattice thermal conductivity of the CexYb0.2−xCo4Sb12 skutterudite system was clearly suppressed in the range between 0.025 and 0.1 for Ce content, due to the introduction of the dual phonon scattering center from Ce and Yb fillers. The highest ZT value of 1.15 at 750 K was achieved for the Ce0.05Yb0.15Co4Sb12 sample. The thermoelectric properties could be further improved by controlling the secondary phase formation of CoSb2 in this double-filled skutterudite system.

/pdf/investigation-of-the-effect-of-double-filler-atoms-on-the-jhl5eg9s.pdf

Investigation of the Effect of Double-Filler Atoms on the Thermoelectric Properties of Ce-YbCo4Sb12

We developed a remote terminal unit (RTU) with real-time communication for the optimal operation of a virtual power plant (Vpp) platform. Currently, Vpp presents two issues during operation: 1) inadequate implementation of real-time communication of measured data and 2) insufficient data security, high initial investment cost, maintenance cost, and insufficient ease of installation. To overcome these problems, we developed an integrated RTU module. The main objective was to develop a real-time power generation information transmission module that combines the functions of a power meter, an RTU, and environmental sensors, such that real-time information can be transmitted from the PV inverter, environment sensors, and power meters. Furthermore, the RTU can employ the standard protocol for exclusive PV system communication and save data during communication failure for as long as 90 d. It can also immediately transmit the saved data after recovering from a communication failure. Moreover, we developed an RTU webpage where users can change the configuration of the RTU module and monitor the condition of the inverter connection and power generation.

/pdf/development-of-remoted-terminal-unit-with-real-time-2medj9z6.pdf

Development of Remoted Terminal Unit with Real-time Communication for Optimal Operation of the Virtual Power Plant

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Investigation of the Effect of Double-Filler Atoms on the Thermoelectric Properties of Ce-YbCo4Sb12

Development of Remoted Terminal Unit with Real-time Communication for Optimal Operation of the Virtual Power Plant