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这篇论文定量分析了在应用于空调及制冷场合时,在涡旋压缩机中应用蒸气喷射技术带来的潜在优势。蒸气喷射将压缩过程划分为两个阶段,减小压缩机功耗和降低蒸发器吸气流量,从而提高其容量。另外比较了两套均采用涡旋压缩机并且同为三冷吨容量的系统(一套使用蒸气喷射技术而另一套则不使用)。建立了一个多级压缩机模型,考虑了过压缩和欠压缩并根据一个单级系统得到了验证。详细的数学模拟模型预测表明,对于空调系统来说COP将提高约6~8%,而压缩机排量将降低16%。对于制冷装置来说,也能获得类似的好处。
This paper presents a quantitative analysis of the potential benefits of using steam injection technology in scroll compressors when used in air conditioning and refrigeration applications. Vapor injection divides the compression process into two stages, reducing compressor power consumption and reducing evaporator suction flow, thereby increasing its capacity. In addition, two sets of systems, each using a scroll compressor and of the same three-ton capacity, were compared (one using steam injection technology and the other not being used). A multi-stage compressor model was established that considered over-compression and under-compression and was validated against a single-stage system. Detailed mathematical modeling predictions show that for an air-conditioning system, the COP will increase by about 6 to 8% while the compressor displacement will decrease by 16%. A similar benefit can also be obtained for a refrigeration unit.