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| DEC700 | |
|---|---|
 The sole DEC700 at Niimi Station, November 2024. | |
| Stock type | Diesel-electric multiple unit |
| In service | 28 September 2024 - Present |
| Manufacturer | Kawasaki Heavy Industries |
| Family name | efACE |
| Constructed | 2021 |
| Entered service | 28 September 2024 |
| Number built | 1 |
| Number in service | 1 |
| Formation | Single unit |
| Operators | JR West |
| Specifications | |
| Car body construction | Stainless Steel |
| Car length | 20,000 mm (66 ft) |
| Width | 2,800 mm (9.2 ft) |
| Maximum speed | 100 km/h (62 mph) |
| Acceleration | 2.1kmh/s |
| Deceleration | 3.9kmh/s |
| AAR wheel arrangement | B-B |
| Track gauge | 1,067 mm (3 ft 6 in) |
The DEC700 is a low capacity diesel-electric multiple unit operated by JR West, being part of the efACE family. The sole unit, DEC700-1, was built by Kawasaki Heavy Industries, and has been in service since September 28, 2024.
The body of the DMU was based off of the 225 and 227 series EMUs also operated by JR West. DEC in the name of the unit means Diesel-Electric Car, and is also matched with the correspondence to the positions of D, E and C on the Chromatic scale.
Background and design
Based on JR West's vision of "creating a sustainable railway and transportation system", this railcar was built to assess in improving maintenance efficiency, safety, and reduce manufacturing costs through system integration of electric and diesel railcars, reduction of mechanical parts, and modular construction.
The DEC700 was designed to be capable of switching to a hybrid system by using additional secondary batteries during technical verification.
Operational history
The railcar was unveiled to the press at the Shimonoseki General Rolling Stock Center on August 11, 2021, and performance tests were conducted on August 16. From September 2021, full-scale trials were conducted on lines within the Yamaguchi Prefecture. Tests were also conducted not only in the jurisdiction of Hiroshima Branch but also in both Yonago and Kyoto areas. Hybrid tests were conducted from 2022.
Separately, as part of efforts to achieve carbon neutrality, demonstration experiments were conducted between 2022 and 2024 to introduce "next-generation biodiesel fuel", expected to have the same quality as diesel with the experiments conducted using the model and the KiHa 40 series.
The railcar was placed into service on the "Hare no Mori" rapid service on the Kishin Line between Tsuyama and Niimi on weekends and holidays from September 28 to November 24, 2024.
References
- ^ "JR西日本DEC700形、新型車両が登場 - 前面は227系などに似ている?". マイナビニュース (in Japanese). 2021-06-28. Retrieved 2024-12-22.
- ^ "新型電気式気動車（DEC700）の導入について" [Introduction of new electric diesel railcar (DEC700)] (PDF) (in Japanese). JR West. 25 June 2021. Retrieved 24 December 2024.
- "電気式内燃動車（DEC700）の開発" [Development of electric internal combustion railcar (DEC700)] (PDF). Building a sustainable railway and transportation system (in Japanese). No. 46. p. 17-18. Retrieved 24 December 2024.
- ^ Nishinaka, Yuki (11 August 2021). "JR西日本初の電気式気動車「DEC700」登場！" [Introducing JR West's first electric diesel railcar, the DEC700!]. tetsudo.com (in Japanese). Retrieved 24 December 2024.
- ^ "新型電気式気動車ＤＥＣ７００形を公開 ＪＲ西" [JR West unveils new electric diesel railcar DEC700 series] (in Japanese). 12 August 2021. Archived from the original on 21 August 2021. Retrieved 24 December 2024.
- ^ "新型電気式気動車、来月中旬から試験運転新山口駅拠点にＤＥＣ７００形" [New electric diesel railcar to undergo test operation from mid-next month] (in Japanese). 29 July 2021. Archived from the original on 21 August 2021. Retrieved 24 December 2024.
- "環境長期目標「ＪＲ西日本グループ ゼロカーボン 2050」達成に向けた取り組み次世代バイオディーゼル燃料の導入に向けた実証実験開始！" [JR West Group's efforts to achieve its long-term environmental goal of Zero Carbon 2050: Demonstration experiments begin for the introduction of next-generation biodiesel fuel!] (PDF). West Japan Railway Company. August 2022. Retrieved 24 December 2024.
- "【DEC700初の営業運転も】「森の芸術祭 晴れの国・岡山」期間中の列車アクセスについて" [ Train access during the "Forest Art Festival: Sunny Country, Okayama"] (in Japanese). 27 May 2024. Retrieved 24 December 2024.
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