成果報告書詳細
管理番号20120000000197
タイトル*平成23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)/快適・省エネヒューマンファクターに基づく個別適合型冷暖房システムの研究開発」
公開日2012/4/28
報告書年度2011 - 2011
委託先名特定非営利活動法人ウェアラブル環境情報ネット推進機構 国立大学法人東京大学 株式会社竹中工務店
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、従来のエアコンと異なり、空気を介さず直接人体を冷暖房することにより、使用するエネルギーを効率的に低減する技術を開発するもので、この技術を実用化することにより、家庭及び業務部門におけるエネルギーを大幅に削減することが可能となる。更には装置自体の小型化・ウェアラブル化が可能なことからいつでもどこでも個人に適合した体温調節を可能とするとともに、ヒューマンファクターの研究に基づくきめ細かい制御を可能とすることと合まって既存のエアコンの最適制御も可能とするので、社会全体のトータルエネルギーの削減にも寄与するものである。
平成23 年度の進捗状況を各項目別に記す。
英文要約1) Development of core temperature-conditioning systems
On the basis of prototype neck-wear device, the following development has been carried out for a slimmer and more comfortable one. (a)a temperature sensor with the accuracy of +/-0.5 degrees C has been installed in the rear part of the Peltier device, (b) the heat-conductive rubber sheet has been improved with higher level of conductivity, 3 to 5 W/mK, and lower level of thickness, 0.5mm. The slimmer neck equipment and three-dimensional form easy to fit people’s neck have enabled them to use for 3 months in a row, at 12 hours per day. The temperature controller has been installed to inform the users of the temperature in units of 0.1degrees C by feedback control (PID control).
In preparation for providing visible information to contribute intervention studies, the project successfully visualized the information on atomic nervous systems and core temperatures.
2) Development of control algorithm for core temperature
Experiments on total of 18 subjects have shown that perspiration sensor was most suitable for the control system of the neck cooling device. There was no noticeable variation in core temperature under experimental protocol that covered ordinary hot conditions. Literature survey has revealed that there was no reported case or study on possible health risk caused by local neck cooling. To clarify perception mechanisms of human comfort, a model was constructed to organize brain networks mainly consisting of sub-cortical ganglia. Clinical tests were performed with five healthy adult participants under extraordinary thermal conditions. Features extracted from trailing signals of electroencephalograms were matched to subjective comfort levels. A novel visual analog scale was presented to independently evaluate temperature sensations and feelings.
3) Evaluation of the human comfort and energy saving factors
Experiments of 4 males and 1 female, aged between 30 and 40, were conducted to assess the effectiveness of the neck-wear device. Specifically, they conducted evaluation on their subjective sense of warmth and comfort, using VAS (Visual analog scale), and measured their amounts of perspiration. The room temperature was gradually raised from 26 to 34 degrees C, at a humidity of 50% and wind speed of 0.15 m/s. During the experiments, subjects were seated in a chair in the room for 2 hours. VAS evaluation results show that the subjects tended to be uncomfortable with high LF/HF ratio when they start sweating. Comparison of the temperature shows that when they cooled their neck, four out of five subjects started sweating at higher room temperature than when they did not. The results suggest the neck-wear device can supplement and alternate the conventional air-conditioning system, as it is expected to save energy, within 27.8 W of electricity for cooling and within 10 W of electricity for warming.
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