• 동력기계공학회지
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• 제16권2호
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• pp.17-23
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• 2012

The steady three-dimensional computational thermal flow analysis using standard k-${\varepsilon}$ turbulence model was carried out to investigate the heat transfer characteristics of a cabin cooler for a commercial vehicle. The heat exchanging method of this cabin cooler is to use the cooling effect of a thermoelectric module. In view of the results so far achieved, the air system resistance of a cabin cooler is about 12.4 Pa as a static pressure, and then the operating point of a cross-flow fan considering in this study is formed in the comparatively low flowrate region. The air temperature difference obtained from the cold part of an thermoelectric module is about $26^{\circ}C$, and the cooling water temperature difference obtained from the hot part of an thermoelectric module is about $3.5^{\circ}C$.

• 동력기계공학회지
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• 제16권5호
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• pp.47-54
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• 2012

The steady three-dimensional numerical analysis on the thermal flow using standard k-${\varepsilon}$ turbulence model was carried out to investigate the air cooling effect of a cooler on the cabin for a commercial vehicle. Here, the heat exchanging method of this cabin cooler uses the cooling effect of a thermoelectric module. In consequence, the air system resistance of a cooler within the cabin is about 12.1 Pa as a static pressure, and then the operating point of a virtual cross-flow fan considering in this study is formed in the comparatively low flowrate region. The discharging air temperature of a cooler is about $14{\sim}15^{\circ}C$. Moreover, the air cooling temperature difference obtained under the outdoor cabin temperature of $40^{\circ}C$ shows about $7{\sim}9^{\circ}C$ in a driver resting space and about $9{\sim}14^{\circ}C$ in the front of a driver's seat including the space of a driver's foot.

• Journal of Biosystems Engineering
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• 제9권2호
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• pp.74-80
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• 1984

시설규모(施設規模)가 작은 축소형(縮少型) 열저장장치(熱貯藏裝置)를 개발(開發)하기 위한 기초적(基礎的)인 연구(硏究)로 비교적(比較的) 열흡수능력(熱吸收能力)이 큰 염화칼슘, 황산(黃酸) 나트륨, 산성인산(酸性燐酸)나트륨 등(等)의 수화염류를 축열매체로 한 수직관형축열조(垂直管形蓄熱槽)를 제작(製作)하고 이들 축열장치(蓄熱裝置)를 이용(利用)한 축열매체의 열저장특성(熱貯藏特性)을 실험(實驗)을 통(通)하여 구명(究明)하기 위하여 수행(遂行)되었으며 그 결과(結果)를 요약(要約)하면 다음과 같다. 가. 수직관형축열조(垂直管形蓄熱槽)에서 반경방향 온도분포를 검토한 결과(結果), 본(本) 실험(實驗)에 사용(使用)된 모든 열매체는 가열과정(加熱過程)에서는 결정수(結晶水)의 감소(減少)로 인(因)한 발열현상(發熱現象)때문에 잠열현상(潛熱現象)이 나타나지 않았으나 냉각시(冷却時)에는 이들 축열매체중 염화칼슘이 가장 뚜렷한 잠열현상(潛熱現象)을 보였으므로 상변화를 이용(利用)한 축열매체로서 가장 적합(適合)하다고 사료(思料)되었다. 나. 가열(加熱) 및 냉각시(冷却時) 축열매체에 전달된 열량(熱量)은 같은 조건하(條件下)에서 염화칼슘의 경우(境遇)가 가장 많았다.