Thermodynamic analysis of an ammonia/water absorption–resorption refrigeration system
Thermodynamic analysis of an ammonia/water absorption–resorption refrigeration system
复制标题
DOI：
10.1016/j.ijrefrig.2019.03.023
复制
发表时间：
2019-07
影响因子：
3.9
通讯作者：
M. Berdasco;M. Vallès;A. Coronas
中科院分区：
文献类型：
--
作者：
M. Berdasco;M. Vallès;A. Coronas
氨/水吸收-再吸收制冷系统是一种有趣的技术替代传统的吸收系统，由于其额外的自由度，这使得操作更灵活，可以显着降低通常的高工作压力，因此可以使用更便宜的组装材料。本文旨在回顾迄今为止在这些系统上进行的理论和实验工作，特别关注目前正在运行的实验装置和改进系统控制的最新进展。本文报道了当氨/水单级循环的主要组分温度固定时，如何确定其工作压力范围，以及这些工作温度变化时压力范围的变化情况。通过对选取的基本工况进行理论研究，在不降低性能的前提下，对发电机后不进行整改的循环性能进行评价。最后，应该指出的是，吸收溶液换热器的有效性对循环的性能和运行条件起着重要的作用，因为循环不能低于一定的有效性值。
Ammonia/water absorption–resorption refrigeration systems are an interesting technological alternative to conventional absorption systems thanks to their additional degree of freedom, which makes operation more flexible and can significantly reduce the typically high working pressure, so cheaper assembly materials can be used. This paper aims to review the theoretical and experimental works carried out so far on these systems, paying special attention to the experimental plants currently operating and recent progress in improving system control.This paper reports how to determine the operational pressure range when the temperatures of the main components of the ammonia/water single-stage cycle are fixed and how the pressure range changes when these working temperatures are varied. As a result of the theoretical study of the base case selected, the cycle performance was evaluated without rectification after the generator in order to reduce the size and cost of the system without reducing the performance. Finally, it should be pointed out that the effectiveness of the resorption solution heat exchanger plays an important role in the performance and operating conditions of the cycle because the cycle cannot work below certain values of effectiveness.