Numerical investigation of a diffusion absorption refrigeration cycle
Numerical investigation of a diffusion absorption refrigeration cycle
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DOI：
10.1016/j.ijrefrig.2004.11.003
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
A. Zohar;M. Jelínek;A. Levy;I. Borde
中科院分区：
文献类型：
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作者：
A. Zohar;M. Jelínek;A. Levy;I. Borde
建立了以氢气或氦气为辅助惰性气体的氨-水扩散吸收制冷（DAR）循环的热力学模型，该循环由瑞典伊莱克斯公司（Electrolux Sweden）（目前称为Dometic）制造。系统的性能进行了参数化的计算机模拟。质量和能量守恒方程的循环和数值求解的每个组成部分。通过与先前发表的DAR系统的实验数据进行比较，该模型得到了验证。不同条件下的循环性能研究表明，富液浓度在0.2-0.3氨质量分数范围内循环性能最佳，稀液浓度推荐为0.1。还发现，随着整流程度的降低，DAR循环的性能降低。最后，研究表明，氦气作为惰性气体比氢气优越上级：使用氦气工作的DAR单元的性能系数比使用氢气工作的循环高40%。
A thermodynamic model was developed for an ammonia–water diffusion absorption refrigeration (DAR) cycle with hydrogen or helium as the auxiliary inert gas, manufactured by Electrolux Sweden (currently known as Dometic). The performance of the system was examined parametrically by computer simulation. Mass and energy conservation equations were developed for each component of the cycle and solved numerically. The model was validated by comparison with previously published experimental data for DAR systems. Investigation of cycle performance under different conditions indicated that the best performance was obtained for a concentration range of the rich solution of 0.2–0.3 ammonia mass fraction and that the recommended concentration of the weak solution was 0.1. It was also found that as the degree of rectification decreased, the performance of the DAR cycle decreased. Finally, the study showed that helium was superior to hydrogen as the inert gas: the coefficient of performance of a DAR unit working with helium was higher by up to 40% than a cycle working with hydrogen.