Mitsubishi Electric Corporation
Delivered smart medium and low voltage DC power distribution network system to NOVARE, a forest for thermal disaster innovation.
Direct current interconnection of hydrogen-related equipment, solar power generation, and storage batteries throughout the facility, realizing CO2 reduction and BCP
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Medium and low voltage DC distribution network system D-SMiree
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D-SMiree storage enclosure
Mitsubishi Electric Corporation is a company founded by Shimizu Corporation (Headquarters: Chuo-ku, Tokyo, President and CEO: Kazuyuki Inoue, hereinafter referred to as “Shimizu Corporation”) that began operations on September 1, 2023 as a base for innovation and human resource development. The Mitsubishi medium-low-voltage DC power distribution network system “D-SMiree(R) (*1)” has been delivered to NOVARE, a forest for thermal and environmental innovation (Shiomi, Koto-ku, Tokyo), and all of NOVARE’s buildings have been installed. We would like to inform you that we are now fully operational.
Shimizu Corporation is focusing on urban development in the
carbon-neutral era, and at NOVARE, the Onsen Innovation Forest, we are demonstrating the CO2 reduction effect of DC microgrids and equipment conversion at the block level towards a decarbonized society. It is being said.
This time, we have built a system using D-SMiree that connects not only solar power generation equipment and storage battery equipment, but also hydrogen power generation equipment (fuel cells) and hydrogen production equipment, from power generation to load-side equipment, using D-SMiree. This contributes to reducing CO2 emissions by approximately 30 tons per year. In addition, by charging storage batteries with electricity generated by solar power generation and hydrogen power generation equipment (fuel cells) and sharing energy throughout the facility, lighting and hydrogen production equipment can be operated independently for long periods of time even during power outages. This makes it possible to contribute to BCP during disasters.
■System features and effects of introduction
1. In addition to solar power generation equipment, hydrogen power generation and hydrogen production equipment are interconnected via direct current, realizing clean energy production.
・In addition to solar power generation equipment and storage battery equipment, we have realized DC interconnection with hydrogen power generation equipment (fuel cells) and hydrogen production equipment. ・The surplus electricity from the solar power generation equipment is supplied as direct current to the hydrogen production equipment, making full use of the surplus electricity on the premises, realizing the production of clean energy in an environmentally friendly manner. 2. In addition to utilizing renewable energy, reducing power conversion loss contributes to approximately 30 tons of CO2 reduction per year throughout the facility.
・Reduced 28.25 tons of CO2 per year by using solar power generation, hydrogen power generation equipment, and storage battery power ・By connecting DC power generated by solar power as DC to hydrogen power generation equipment and storage batteries, which are DC loads, conversion loss is suppressed and CO2 emissions are reduced by 0.78t per year compared to converting to AC. Contributes to approximately 30 tons of CO2 reduction per year throughout the facility
3. Strengthening BCP functions in the event of a disaster by constructing a DC power distribution system between buildings ・By charging storage batteries with surplus electricity from solar power generation and highly efficiently accommodating power between buildings using DC power distribution, DC load equipment such as hydrogen production equipment can be operated independently for long periods of time even during power outages.
– Achieved a stable supply of renewable energy electricity generated in a separate building to a temporary evacuation site even in the event of a disaster, contributing to strengthening BCP functions. ■Delivered product specifications/system configuration
[Table 2: https://prtimes.jp/data/corp/120285/table/133_1_7fd5f475702e4b5e3d82b47061d5af75.jpg]
[Image 3: https://prtimes.jp/i/120285/133/resize/d120285-133-5953F219568529c0f5e4-3.jpg &s3=120285-133-a74193AF55C23BB9424F106A2 722F9-1214X784.jpg] System configuration diagram at NOVARE and the system scope of D-SMiree ■Our approach to DC power distribution systems
In recent years, efforts to achieve carbon neutrality, which reduces greenhouse gas emissions to virtually zero, have been accelerating worldwide. Additionally, there is an increasing demand for energy self-sufficiency at disaster prevention bases and evacuation centers in preparation for natural disasters such as earthquakes and typhoons. Among these, DC power distribution systems are attracting attention as a power distribution system that can utilize electricity without wasting it, due to the expanding use of renewable energy such as solar power generation and storage batteries, and the shift to ZEB (*2) buildings.
Going forward, we will continue to further improve the functionality of our medium-low voltage DC power distribution network system “D-SMiree” and add value to DC power distribution through
interconnection with building power supply equipment and expansion of maintenance and equipment management services after operation begins. Through these efforts, we will promote the spread of DC power distribution systems and contribute to the realization of a
sustainable society.
■Outline of NOVARE, a forest for innovation
Shimizu Corporation is a base for innovation and human resource development that began operation on September 1, 2023. Aiming to achieve zero energy consumption not only for individual buildings but also at the block level, we are realizing “block heat exchange,” which efficiently exchanges thermal energy across the area. In addition, in addition to converting surplus electricity from renewable energy into hydrogen and storing it, and extracting the hydrogen to generate electricity when necessary, we also carry in hydrogen produced off-site, store it, and use it to power the building. We have adopted an auxiliary hydrogen energy utilization system and are proceeding with the introduction of equipment compatible with the hydrogen supply chain. “NOVARE, a forest for thermal disaster innovation,” is part of the Ministry of the Environment’s “Project to Promote Regional Renewable Energy Mainstreaming and Resilience Strengthening through the Utilization of PPA, etc.,” which is part of the Ministry of the Environment’s “Direct Current Inter-Building Interchange Support Project, which both reduces CO2 emissions during normal times and serves as an evacuation facility during disasters.” ” has been adopted.
■Trademark related
“D-SMiree” is a registered trademark of Mitsubishi Electric Corporation. “NOVARE” is a registered trademark of Shimizu Corporation.
*1 D-SMiree：Diamond-Smart Medium voltage direct current distribution network system
innovative reliability economy ecology
*2 ZEB: Net Zero Energy Building
-For inquiries from customers-
Mitsubishi Electric Corporation Social Systems Business Division Facility Infrastructure Systems Division
2-7-3 Marunouchi, Chiyoda-ku, Tokyo 100-8310
TEL 03-3218-4611 FAX 03-3218-4677
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