成果報告書詳細
管理番号20120000000383
タイトル*平成23年度中間年報 次世代型ヒートポンプシステム研究開発/実負荷に合わせた年間効率向上ヒートポンプシステムの研究開発
公開日2012/6/1
報告書年度2011 - 2011
委託先名日立アプライアンス株式会社 株式会社日立製作所
プロジェクト番号P10011
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. 共同研究の内容及び成果等 本研究開発の目標は、ヒートポンプシステムの年間効率を現状の1.5倍にする事である。 平成23年度は、(1)ヒートポンプシステムの研究開発においては、自然循環方式熱交換器の設計と試作、蒸気圧縮方式と自然循環方式を組み合わせたヒートポンプシステムの構成設計と試作、適応制御コントローラの作成、モニタ機の試験準備を実施し、(2)高効率ワイドレンジスクロール圧縮機の研究開発においては、プロトタイプ機の設計と試作と試験、及びDLC摺動特性要素試験、評価を実施した。また、開発した圧縮機を搭載したヒートポンプシステムの実機性能試験を環境試験室において実施した。
英文要約Title: A Heat Pump System That Improves Annual Efficiency by Fitting the Actual Air-conditioning Load

To improve the annual efficiency of the conventional packaged heat pump system by 50%, we have proposed a heat pump system with a highly efficient wide-range scroll compressor. This year we designed and manufactured the heat pump system and the scroll compressor in accordance with its specifications, which were decided last year, and tested the efficiency of the compressor and the heat pump system of the first prototype. As for the heat pump system, we designed the heat exchanger of the refrigerant natural circulation system for common use with the refrigeration vapor compression system. For the adaptive controller, we programmed its adaptive mechanism, which adjusts the control constant in accordance with the characteristics of the heat pump system, and we used only it, so the adaptive controller maintains stability. In regard to the compressor, we designed and manufactured the prototypes that have been specified by an optimizing method using a scroll compressor simulator. The displacement volume of the new compressor is 72% compared with that of the conventional one, and to compensate for maximum capacity, the operating speed is raised to 140 rps. In addition, to increase its efficiency at low speed, we adopted a new slide bearing coated with diamond-like carbon (DLC), which decreases the coefficient of friction to 50% of the maximum degree. As a result of measuring the new compressor, it has been proved that the compression efficiency was improved at a load ratio of less than 50%, and the peak compression efficiency was higher than that of the conventional one. The progress rate at a 10% load ratio was improved by 26%, and we achieved the target value. For this first prototype heat pump system, which was specified above, we have tested it in a thermostatic chamber as step 1. As a result, it has been proved that the efficiency of the developed heat pump system is 151% compared with that of the conventional heat pump system. Finally, we installed our new heat pump systems at Shimizu Air Conditioning Works, Hitachi Appliances, Inc. (2 units) and Hokkaido University (1 unit) as step 2, which was to test and monitor them in practical use.
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