成果報告書詳細
管理番号20130000000154
タイトル*平成24年度中間年報 省エネルギー革新技術開発事業 先導研究(事前研究一体型) 磁気ヒートポンプ技術の研究開発
公開日2013/5/2
報告書年度2012 - 2012
委託先名中部電力株式会社 公益財団法人鉄道総合技術研究所 株式会社三徳 サンデン株式会社
プロジェクト番号P09015
部署名省エネルギー部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容及び成果等 本研究開発は、「次世代型ヒートポンプシステム」のひとつとして、磁気熱量効果を用いたヒートポンプ技術の実用化に向けた開発に取り組むもので、この技術を実用化することにより鉄道車両内の空調、業務用冷凍空調設備、自動販売機などの消費エネルギーを大幅に削減することができる。
英文要約Title: Energy Conservation Innovation Technology Development Project / Lead Study (Integrated Type Preliminary Study) / Magnetic Heat Pump Technology Research and Development (FY2011-2013) FY2012 Annual ReportA processing technique using laser metal powder sintering was used to produce a heat exchanger structure that contains a fine structure, and the influence of controlling the porosity and specific surface area on heat exchange enhancement and pressure loss reduction was verified. This technique allowed for the achievement of a specific surface area of 1.0 × 104 [1/m] or higher. As for the permanent magnet embedded to the kW class magnetic heat pump, a new Halbach array permanent magnet was designed and produced using magnetic field analysis. The Halbach array magnet that was produced is expected to achieve a magnetic field of 1.5T, which is the target for the magnetic pole surface. A liquid to liquid heat exchanger was adopted for the cooled portion, and a heat exchanger heat-transfer performance evaluation device for water cooling was configured for the magnetic heat pump that can understand the heat exchanger structure, heat exchange efficiency, etc. The performance of the test production magnetic heat pump drive portion that was embedded to the system was confirmed. Candidate materials with high performance include MnFe and LaFe that have received thermal hydrogen processing. As for MnFe, because Ru displacement increases the lattice constant, it is a good element for reducing thermal hysteresis, and refrigeration performance of the Ru displacement substance is 1.6 to 1.9 times that of Gd. As for LaFe that has received thermal hydrogen processing, after homogenization heat treatment, ΔS was calculated for the sample that received the hydrogen process using La (Fe1-xSix)13 (x = 0.10, 0.12) produced using the strip casting method. The desired magnetic working substance to be used for the magnetic heat pump needs to have a cooling medium and high heat exchange efficiency. It was confirmed that a thin LaFeCoSi plate with a surface area of at least 1000 mm2 and a thickness of no more than 1 mm can be acquired by cutting from bulk material. In the preliminary study during the first half of 2012, spherical LaFe material with a magnetic entropy variation that is double that of Gd and Gd were filled to existing magnetic refrigerators, and the refrigeration capacities were measured and compared. Results confirmed that LaFe has a refrigeration capacity of at least 100W and an efficiency (COP) of at least 4, which is about double the refrigeration capacity and COP of Gd. Based on this result, we began to produce a test machine that can have a refrigeration capacity of hundreds of Watts at a temperature difference of 25°C or more. From the analysis for the test production system that had two parallely-connected units filled with a Gd alloy, a refrigeration capacity of about 1,800W at a temperature difference of 0°C was achieved. From the analysis for two serially-connected units, a refrigeration capacity of about 640W at a temperature difference of 16°C was achieved. This allows for a maximum temperature difference of about 27 °C to be expected.
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