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中间压力对商超CO_2增压制冷系统性能的影响

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  • Key Words:跨临界CO_2;增压系统;并行压缩;中间压力;制冷系统

  • Abstract:针对商超用跨临界CO_2基本增压（BRC）和并行压缩（PRC）制冷系统，建立系统分析的热力学模型并进行理论模拟分析，重点探讨中间压力及环境温度、排气压力等工况参数对系统性能的影响。结果表明：中间压力的取值对基本增压制冷系统COP影响较小；而并行压缩系统的中间压力存在最佳值，范围在5～5.3 MPa，可使系统的最佳排气压力略有降低。中间压力越大，PRC系统BRC系统的最大COP和最大效率提升程度越明显。给定工况下，并行压缩系统的最大COP较BRC提升了19.67%～24.08%，最大效率提升了26.86%～33.04%。

  • Volume:v.52

  • Issue:10

  • Translation or Not:no

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