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首页> 外文期刊>International Journal of Refrigeration >Experimental study of the thermal conductivity of ammonia + water refrigerant mixtures at temperatures from 278 K to 356 K and at pressures up to 20 MPa
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Experimental study of the thermal conductivity of ammonia + water refrigerant mixtures at temperatures from 278 K to 356 K and at pressures up to 20 MPa

机译：氨水制冷剂混合物在278 K至356 K温度和最高20 MPa压力下的导热系数的实验研究

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摘要

The thermal conductivity of binary ammonia + water mixtures was measured over the temperature range from 278 K to 356 K and at pressures to 20 MPa using the steady-state hot-wire method. Measurements were made for ten compositions over the entire concentration range from 0 to 1 mole fraction of ammonia, namely, 0.0, 0.1905, 0.2683, 0.3002, 0.4990, 0.5030, 0.6704, 0.7832, 0.9178, and 1.0 mole fraction of ammonia. In total, 316 experimental data points were obtained. The expanded uncertainty, with a coverage factor of k = 2, of the thermal conductivity, pressure, temperature, and concentration measurements is estimated to be 3%, 0.05%, 0.02 K, and 0.0014%, respectively. The average absolute deviation (AAD) between the measured and calculated reference values for pure water and ammonia is 1.3% and 1.4%, respectively. Correlation models for the thermal conductivity of liquid ammonia + water mixtures were also developed.
机译：使用稳态热线法在278 K至356 K的温度范围内和压力至20 MPa的条件下测量了二元氨水混合物的热导率。在氨的0至1摩尔分数的整个浓度范围内，即0.0、0.1905、0.2683、0.3002、0.4990、0.5030、0.6704、0.7832、0.9178和1.0摩尔分数的十种组合物进行测量。总共获得了316个实验数据点。覆盖系数k = 2时，热导率，压力，温度和浓度测量值的扩展不确定度分别估计为3％，0.05％，0.02 K和0.0014％。纯水和氨的测量参考值与计算参考值之间的平均绝对偏差（AAD）分别为1.3％和1.4％。还建立了液氨+水混合物导热系数的相关模型。

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