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首页> 外文期刊>International Journal of Refrigeration >Modeling and simulation of the transcritical CO_2 heat pump system
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Modeling and simulation of the transcritical CO_2 heat pump system

机译：跨临界CO_2热泵系统的建模与仿真

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摘要

In this study, a CO_2 transcritical cycle model without imposing any excessive constraints such as fixed discharge pressure and suction pressure is developed. The detailed geometrical variation of the gas cooler and the evaporator have been taken into account. The model is validated with the experimental measurements. Parametric influences on the CO_2 system with regard to the effect of dry bulb temperature, relative humidity, inlet water temperature, compressor speed, and the capillary tube length are reported. The COP in-creases with the dry bulb temperature or the inlet relative humidity of the evaporator. Despite the refrigerant mass flowrate may be increased with the inlet water temperature, the COP declines considerably with it. Increasing the compressor speed leads to a higher heating capacity and to a much lower COP. Unlike those of the conventional sub-critical refrigerant, the COP of the transcritical CO_2 cycle does not reveal a maximum value against the capillary tube length.
机译：在这项研究中，建立了一个CO_2跨临界循环模型，而没有施加任何过多的约束，例如固定的排放压力和吸入压力。已经考虑了气体冷却器和蒸发器的详细几何变化。通过实验测量验证了该模型。报告了关于干球温度，相对湿度，进水温度，压缩机速度和毛细管长度对CO_2系统的参数影响。 COP随着干球温度或蒸发器入口相对湿度的增加而增加。尽管制冷剂质量流量可能会随着进水温度的升高而增加，但COP却随之大幅下降。提高压缩机速度会导致更高的加热能力和更低的COP。与常规亚临界制冷剂不同，跨临界CO_2循环的COP并未显示出相对于毛细管长度的最大值。

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