| 摘要: |
| 压缩机是蒸气压缩蒸发系统的核心设备，会显著影响系统的能耗和运行稳定性。本文搭建了基于罗茨压缩机驱动的蒸气压缩蒸发实验台，蒸发温度为80~100 ℃，蒸发压力为46.60~101.64 kPa，压缩机压升为17.86~36.03 kPa，蒸发量为125.72~424.85 kg/h，实验研究了吸气流量、压缩比功、容积效率和等熵效率随蒸发温度的变化规律。结果表明：随着蒸发温度的升高，吸气流量（7.10~11.74 m3/min）逐渐升高，压缩比功（310.69~158.54 kJ/kg）逐渐降低，容积效率（52.21%~71.54%）和等熵效率（16.48%~36.15%）均逐渐升高，提高工作频率有助于提高压缩机效率，实测容积效率和压缩比功与相关文献数据较为吻合。压缩机容积效率和等熵效率实测值与理论值存在一定误差，但该误差随蒸发温度的升高而减小，罗茨水蒸气压缩机在蒸发温度为90~100 ℃范围内运行较为稳定、效率较高。 |
| 关键词: 罗茨压缩机 水蒸气压缩 容积效率 等熵效率 实验研究 |
| DOI： |
| Received:April 08, 2021Revised:September 15, 2021 |
| 基金项目:国家自然科学基金（51876216, 21978308）和自治区区域协同创新专项（上海合作组织科技伙伴计划及国际科技合作计划）课题（2020E01048）资助。 |
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| Experimental Study on Performance of Roots Steam Compressor |
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Zhang Huafu1,2, Zhang Qingchun1,3, Tong Lige2, Zhang Zhentao1, Yang Junling1, Yu Ze1, Wang Youdong1
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| (1.Key Laboratory of Equipment and Energy-saving Technology on Food & Pharmaceutical Quality Processing, Storage and Transportation, China National Light Industry, Technical Institute of Physics and Chemistry, CAS;2.College of Energy and Environmental Engineering, University of Science and Technology Beijing;3.College of Electromechanical Engineering, Qingdao University of Science &Technology) |
| Abstract: |
| The compressor is the core equipment of a vapor compression system, which significantly affects the energy consumption and stability of the system. An experimental system was built for the vapor compression system driven by the roots compressor, in which the evaporation temperature, evaporation pressure, compressor pressure, and evaporation capacity were 80–100 °C, 46.60–101.64 kPa, 17.86–36.03 kPa and 125.72–424.85 kg/h, respecitvely. The suction flow rate, compression specific power, volumetric efficiency, and isentropic efficiency of the root water vapor compressor with varying evaporation temperatures were studied experimentally. The results show that the suction flow rate (7.10–11.74 m3/min) gradually increased, and the compression specific power (310.69–158.54 kJ/kg) gradually decreased with the increase in evaporation temperature. Both the volumetric efficiency (52.21%–71.54%) and isentropic efficiency (16.48%–36.15%) increased with the increase in evaporation temperature. Increasing the frequency can enhance the efficiency of the compressor, and the measured volumetric efficiency and compression specific power were consistent with the data in previous studies. There was a difference between the experimental and theoretical values of the volumetric efficiency and the isentropic efficiency of the compressor, but this difference decreased with an increase in the evaporation temperature, and the root water vapor compressor was more stable and highly efficient in the range of evaporation temperature of 90–100 °C. |
| Key words: roots compressor water vapor compression volumetric efficiency isentropic efficiency experimental study |
