DC 欄位 值 語言 DC.contributor 能源工程研究所 zh_TW DC.creator 張奇? zh_TW DC.creator Chi-Che Chang en_US dc.date.accessioned 2017-1-20T07:39:07Z dc.date.available 2017-1-20T07:39:07Z dc.date.issued 2017 dc.identifier.uri http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=102328010 dc.contributor.department 能源工程研究所 zh_TW DC.description 國立中央大學 zh_TW DC.description National Central University en_US dc.description.abstract 本文以實驗的方式研究R-410A與R-32，在圓管6.5mm中穿越超臨界區域的加熱熱傳及壓降特性。R-410A壓力分別為5.0 MPa與5.5 MPa，溫度從59oC-87oC。R-32壓力分別為5.8 MPa與6.5 MPa，溫度從65oC-87oC。流量分別為200 kg/m2s、400 kg/m2s、600 kg/m2s與800 kg/m2s。 在不同的擬臨界壓力下，擬臨界壓力越高，整體壓降會降低，但熱傳也降低，擬臨界壓力越低，整體壓降升高，熱傳也會升高。在R-410A與R-32不同流體的壓降與熱傳係數比較，R-410A與R-32的壓降相差很小，但熱傳係數方面，R-32的最高熱傳係數與R-410A的最高熱傳係數相差2000 W/m2-K。 zh_TW dc.description.abstract In this paper, the heat transfer and pressure drop characteristics of R-410A and R-32 in the supercritical region of 6.5mm in the tube are studied experimentally. R-410A pressure was 5.0 MPa and 5.5 MPa, the temperature from 59oC-87oC. R-32 pressure was 5.8 MPa and 6.5 MPa, the temperature from 65oC-87oC. Flow rates were 200 kg / m2s, 400 kg / m2s, 600 kg / m2s and 800 kg / m2s, respectively. At different pseudo - critical pressures, the higher the pseudo - critical pressure, the lower the overall pressure drop, but also reduce the heat transfer, the lower the pseudo - critical pressure, the overall pressure drop, heat transfer will increase. R-410A and R-32 different fluid pressure drop and heat transfer coefficient comparison, R-410A and R-32 pressure drop difference is very small, but the heat transfer coefficient, R-32 maximum heat transfer coefficient and the R- 410A of the maximum heat transfer coefficient difference of 2000 W / m2-K. en_US DC.subject 超臨界 zh_TW DC.subject R-410A zh_TW DC.subject R-32 zh_TW DC.subject 熱傳 zh_TW DC.subject 壓降 zh_TW DC.subject Supercritical en_US DC.subject R-410A en_US DC.subject R-32 en_US DC.subject Heat Transfer en_US DC.subject Pressure Drop en_US DC.title 超臨界R-410A與R-32熱傳及壓降性能之研究 zh_TW dc.language.iso zh-TW zh-TW DC.type 博碩士論文 zh_TW DC.type thesis en_US DC.publisher National Central University en_US