| 摘要: |
| 对采用两段式喷嘴引射器的两相流引射制冷系统进行了实验研究，并将两段式喷嘴的引射比及其系统COP分别与拉法尔喷嘴引射器的引射比及其系统COP进行了比较。实验结果表明：在冷凝/蒸发温度为45 ℃/1 ℃工况下，使用不同几何尺寸两段式喷嘴引射器的引射比均大于拉法尔喷嘴引射器的引射比，最大提高了约18%；使用两段式喷嘴引射器的制冷系统COP大于使用拉法尔喷嘴引射器的制冷系统COP，最大提高了约12%；在蒸发温度为1 ℃条件下，两段式喷嘴引射器及拉法尔喷嘴引射器的引射比均在冷凝温度为45 ℃时达到最大值，而在冷凝温度为50 ℃条件下，两种引射器的引射比均在蒸发温度为3 ℃时达到最大值。 |
| 关键词: 引射器 两相流 两段式喷嘴 引射比 |
| DOI： |
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| 基金项目:国家自然科学基金（51176142）资助项目。 |
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| Experimental Study on Performance of Dual-serial-throat Nozzle Ejector and Two-phase Ejector Refrigeration Cycle System |
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Ren Liqian, Guo Xianmin, Li Tianlong
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| (Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce) |
| Abstract: |
| The two-phase ejector refrigeration cycle (TPERC) system with a dual-serial-throat nozzle ejector was investigated experimentally, and the entrainment ratio of the ejector and the COP of the system were compared with those of the ejector with Laval nozzle and the TPERC system respectively. The experimental results indicate that the entrainment ratios of the dual-serial-throat nozzle ejectors with different geometric size are greater than those of the Laval nozzle ejectors under the working condition of the evaporating/condensing temperatures 1 ℃/45 ℃, the maximum increment of the entrainment ratio is about 18%; and the COP of the TPERC system with dual-serial-throat nozzle ejector is greater than that of the TPERC system with Laval nozzle ejector, the maximum increment of the COP is about 12%. Under the condition of the fixed evaporating temperature 1 ℃, the entrainment ratios of both the dual-serial-throat nozzle ejector and the Laval nozzle ejector achieve the maximum values as the condensing temperature is about 45 ℃. Under the condition of the fixed condensing temperature 50 ℃, the entrainment ratios of the two types of ejectors achieve the maximum values as the evaporating temperature is about 3 ℃. |
| Key words: ejector two-phase flow dual-serial-throat nozzle entrainment ratio |
