抄録
Thermodynamic cycles involving a phase transition at high temperatures such as organic Rankine cycle (ORC) or high-temperature heat pump is a key technology to realize more effective use of wasted heats. In order to achieve these technologies, a new working fluids which fit an elevated temperature range are demanded. Among a number of candidate, some hydrofluoroolefins (HFOs) were chosen and studied in the present work. A newly developed PVT property measurement system was used to measure PVT properties and vapor pressures of the test fluids. A commercially available magnetic levitation densimeter by Rubotherm GmbH was employed as a density measurement device. Wide temperature and pressure range (up to 423 K and 20 MPa) was achieved by installing originally designed cryostat system. To keep good measurement performance even under hightemperatures or high-pressures, a silicon single crystal sinker was prepared. The density and the mass of the sinker was calibrated by a state-of-the-art calibration equipment. Density measurement uncertainty is not greater than (0.009 to 0.013) %, whereas temperature and pressure measurement uncertainties are 0.018 K and 2.6 kPa, respectively.
本文言語 | English |
---|---|
ホスト出版物のタイトル | 24th IIR International Congress of Refrigeration, ICR 2015 |
出版社 | International Institute of Refrigeration |
ページ | 491-496 |
ページ数 | 6 |
ISBN(電子版) | 9782362150128 |
DOI | |
出版ステータス | Published - 2015 |
イベント | 24th IIR International Congress of Refrigeration, ICR 2015 - Yokohama, Japan 継続期間: 2015 8月 16 → 2015 8月 22 |
Other
Other | 24th IIR International Congress of Refrigeration, ICR 2015 |
---|---|
国/地域 | Japan |
City | Yokohama |
Period | 15/8/16 → 15/8/22 |
ASJC Scopus subject areas
- 制御およびシステム工学
- 電子工学および電気工学
- 機械工学
- 凝縮系物理学