Enabling Technology Project

E8 Development of Advanced Industrial Electricity Equipment for High-Efficiency Energy Equipment Systems

Outline of the area

Hiroyuki Ohsaki Professor, The University of Tokyo
Hiroyuki Ohsaki
The University of Tokyo

With the increasing development of low-carbon technology in ALCA, it has become extremely important to improve the efficiency of power generation and transmission and to lower the energy loss in electric energy utilization because the proportion of electric power consumption in the final energy consumption has been increasing. Previously, in the superconductor-related technology area in ALCA, we focused on further increasing the efficiency of transportation motorization and applying the superconductor technology to it. Electric motors that convert mechanical energy into electric energy have potential applications in electric vehicles, wind power generation, and industrial motors.
In this ALCA Enabling Technology Area, on the basis of innovative technology on electric equipment and systems, we aim at drastically increasing the efficiency and lowering energy loss by introducing advanced electric and magnetic materials. Simultaneously, we aim at demonstrating that these technologies can be the key devices in the realization of a low-carbon society. Based on the ALCA research results obtained thus far such as compact superconductive motors with high efficiency, low-cost high-temperature superconductive wires, and superconducting magnetic separation, we aim at transferring the following research aspects into the practical-use phase within five years: (i) Demonstration of the magnetic separation system for a boiler feedwater scale in thermal power plants. (ii) Demonstration of the high efficiency and long-term operation of compact superconductive motors. (iii) Development of a low-cost, long-durability, and maintenance-free cryogenic cooling technology. (iv) Development of a low-cost, long superconductive wire cooled by liquid nitrogen and superconductive magnet technology for practical use.


Low-Cost High Temperature Superconducting Wire

Toshiya Doi
Professor, Kyoto University

It is very effective to use superconducting wires which is zero electric resistance, instead of copper wires, in order to improve the efficiency of electricity utilization. However, since the present price of superconducting wires is very expensive, they are used only for special purpose such as MRI and MGLEV. In this research, for realizing one tenth of the current price, we try to develop a new low-cost superconducting wire which does not use either expensive noble metal, rare earth or rare metal, and to develop inexpensive manufacturing process suitable for the low-cost superconducting wire.

Low-cost High Temperature Superconducting Wire


System of Superconducting Rotating Machines for Transport Equipments that Supports Low Carbon Society

Taketsune Nakamura
Program-Specific Professor, Kyoto University

This proposal is based upon the system of high-temperature superconducting induction/synchronous machines of which pioneering studies have been conducted by the Kyoto University and AISIN SEIKI Co., Ltd.-academic group. The team is to make the overwhelming high functionality for the existing machines the ultimate and develop electric drive transport equipments that support low carbon society. In concrete, with the use of aforementioned rotating machine system, realization of de-rare earth components, optimization of variable speed, and practical direct drive transport equipments are executed, and then innovative low carbonization is defined clearly.

System of Superconducting Rotating Machines for Transport Equipments that Supports Low Carbon Society


Removing Iron Oxide Particles from Boiler Feed-Water of Thermal Power Plants

Shigehiro Nishijima
Professor, Fukui University of Technology

We are developing a superconducting magnetic separation system to remove iron oxide scale from high-temperature and high pressure boiler feed-water in thermal power plants.
Reduction of scale maintains high energy conversion efficiency of the plant and reduce fuel consumption.
We estimate 1.5 million ton of CO2 reduction per year in Japan.

Feed-water system of thermal power plantCO2 reduction of thermal power plants by superconducting magnet


Development of REBCO Fully Superconducting Rotary Machines

Masataka Iwakuma
Professor, Kyushu University

We will conduct the research and development of fully superconducting rotating machines using REBCO coated conductors (CCs.). Applying our original technologies for reduction of ac losses as well as for enhancement of electric current capacity of conductors using plural pieces of REBCO CCs to the armature windings for rotating machines, we will first develop the superconducting armature winding technologies with low AC loss characteristics and a large current capacity. Combination of this superconducting armature with rotating REBCO superconducting field windings makes it possible to install the both windings into the same casing resulting in reduction of the gap distance and constitute it as a compact superconducting synchronous rotating machine of high output power density and the high efficiency. This rotating machine will bring us the realization of the “low-carbon society” through effective energy savings.

Development of REBCO Fully Superconducting Rotary Machines