Adsorption refrigeration cycle with mass recovery process for low heat source temperature

具有低热源温度的质量回收工艺的吸附式制冷循环

基本信息

批准号：
16360102
负责人：
AKISAWA Atsushi
金额：
$ 9.47万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

The objective of this study is to develop advanced adsorption refrigeration cycle driven by low temperature heat so that wasted heat of low temperature can be utilized. While conventional single stage adsorption cycle using Silica-gel and water as working media needs 80 degree C, proposed advanced cycle called "Reheat cycle" can operates at 60 degree C. It is because reheat cycle works similarly to double stage adsorption cycle even though the cycle configuration is the same as single stage cycle.In this study, the performance of reheat cycle was investigated by numerical simulations. Furthermore, experiments were conducted in order to examine the performance actually. The results indicate that the performance with relatively higher driving temperature becomes larger when the cycle time is controlled to be short. In contrast, the cycle gives a certain cooling capacity for low driving temperature as the double stage cycle can do when the cycle is operated with long cycle time. In other … More words, the proposed cycle has much flexibility to adjust to external operating conditions. Sensitivity analyses of cycle time, mass recovery time or temperature of driving heat source were employed to understand the effect of such parameters on the performance of cooling output and COP (Coefficient of Performance) experimentally.Reheat two stage cycle was expanded to three stage cycle in reheat scheme. The cycle was modeled and simulated numerically, which indicates that the new cycle can operate at even lower driving heat source temperature than reheat two stage cycle.One of the applications of reheat scheme is to assist single stage cycle with three adsorption beds. While conventional single stage cycle has two beds, reheat cycle has four beds. The proposed cycle has extra bed, the third bed, working twice as quickly as the others do and connecting the other two beds alternately for mass recovery process. The cycle simulation clarified that the proposed cycle has higher performance than the conventional cycle. Less

这项研究的目的是开发由低温热驱动的高级吸附冷藏循环，以便可以利用低温的热量。虽然传统的单阶段使用硅胶和水作为工作媒体需要80度C增加了吸附周期，但提议的高级周期称为“重新加热周期”可以在60度C下运行。这是因为，即使循环构型与单阶段的循环相同，但在这项研究中，重新循环的表现相同。此外，进行了实验以检查表现。结果表明，当控制周期时间短时，驾驶温度相对较高的性能变得更大。相比之下，该周期为低驾驶温度提供了一定的冷却能力，就像双阶段周期在循环长时间操作时可以执行的那样。在其他……更多词语中，提议的周期具有很大的灵活性来适应外部工作条件。对周期时间，质量恢复时间或驱动热源的温度进行敏感性分析，以了解此类参数对实验的敏感性分析对冷却输出和COP（绩效系数）的性能的影响。将两级周期扩展到重新加热方案中的三个阶段周期。对周期进行了建模和模拟，这表明新循环可以在更低的驾驶热源温度下工作，而不是再加热的两个阶段周期。再加热方案的应用之一是使用三个添加吸附床来协助单阶段周期。虽然传统的单阶段周期有两张床，但重新周期有四个床。拟议的周期有额外的床，第三张床，工作速度是其他床的两倍，并连接其他两张床以进行质量恢复过程。阐明了循环模拟，所提出的周期的性能高于常规周期。较少的