Low-source-temperature diffusion absorption refrigeration. Part I: Modeling and cycle analysis
Low-source-temperature diffusion absorption refrigeration. Part I: Modeling and cycle analysis
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DOI：
10.1016/j.ijrefrig.2015.10.010
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发表时间：
2016-05
期刊：
影响因子：
--
通讯作者：
A. Rattner;S. Garimella
中科院分区：
文献类型：
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作者：
A. Rattner;S. Garimella
扩散吸收制冷（DAR）循环提供了一种潜在的完全热激活冷却技术。然而，大多数实施方案在高源温度、强制液体冷却或升高的蒸发器温度（105 ° C）下操作。此外，文献中几乎没有组件设计资源。在本调查的第一部分，提出了一个完全被动的DAR设计。降低温度的操作是启用替代工作流体（NH 3-NaSCN-He），分布式加热气泡泵发生器（BPG），和增强吸收。详细的模型，制定了BPG，冷凝器，蒸发器，吸收器和气体循环回路。这些被集成以产生整体系统模型。在一系列操作条件下评估系统行为。在必要和合理预期的部件性能下，在设计条件（T amb= 24° C）下，在低源温度（110-130° C）和被动空气冷却下，可以实现0.11-0.26的制冷COP。在随附的文件（第二部分），该制冷系统的实验证明，并提出的模型进行评估。
The diffusion absorption refrigeration (DAR) cycle offers a potentially fully thermally activated cooling technology. However, most implementations operate with high source temperatures, forced liquid cooling, or elevated evaporator temperatures (≳ 5° C). Additionally, few component design resources are available in the literature. In Part I of this investigation, a fully passive DAR design is proposed. Reduced temperature operation is enabled with alternate working fluids (NH 3-NaSCN-He), a distributed heated bubble-pump generator (BPG), and an enhanced absorber. Detailed models are formulated for the BPG, condenser, evaporator, absorber, and gas circulation loop. These are integrated to yield an overall system model. System behavior is evaluated over a range of operating conditions. With the necessary and reasonably expected component performances, refrigeration COPs of 0.11–0.26 can be achieved at design conditions (T amb= 24° C) with low source temperatures (110–130° C) and passive air cooling. In the accompanying paper (Part II), this refrigeration system is experimentally demonstrated, and the proposed models are evaluated.