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现行 ST-16-013(RP-1462)
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Experimental Setup and Methodology on Active Mechanisms for Enhancing Heat and Mass Transfer in Sorption Fluids 吸附流体强化传热传质主动机制的实验装置和方法
本文基于ASHRAE研究项目RP-1462的研究结果。强化吸附流体中的传热传质可以改善吸收式制冷机的整体性能。主动机制被认为是实现这一目标的潜在有效手段。需要一个测试设备来评估添加主动机构后对制冷机性能的影响。该项目的挑战包括实现机构运动以驱动吸收器中的额外热量和质量传递、相关变量的测量以及结果的稳定性和可重复性。这些挑战来自这样一个事实:吸收式制冷机是带有大型热交换器的闭环系统,内部压力较低,并且只能承受制冷剂回路沿线的微小压降。 需要采取措施防止振动对系统中非目标部件的影响。本文详细介绍了实验室建设方法,包括振动台、辅助水回路系统和测量仪器。然后,我们给出了几个例子来说明测试系统的操作和测试过程以及稳定性。最后,给出了实验计划矩阵和分析方法,并将其应用于下一阶段的实验。利用闭式吸收式制冷机进行性能分析的主动机理和试验方法的实现,可为类似的热应用提供参考。引用:2016年年度会议,密苏里州圣路易斯,2016年交易,第122卷。2.
This paper is based on findings resulting from ASHRAE Research Project RP-1462.Enhancement of heat and mass transfer in sorption fluidscould improve the overall performance of absorption chillers.Active mechanisms are proposed as a potential effective meansto achieve this goal. A testing facility is needed to evaluate theimpact on the performance of the chiller after adding an activemechanism. The challenges of this project include the fulfillmentof mechanism motion to drive extra heat and mass transferin an absorber, the measurement of related variables, andthe stability and repeatability of findings. These challengescome from the fact that absorption chillers are closed-loopsystems with large heat exchangers, have low inside pressures,and can sustain only small pressure drops along the refrigerantloop. Measures are needed to prevent the impact of vibrationon untargeted components in the system. In this paper, weintroduce the details of the lab construction methodology,including the vibration table, the auxiliary water loop system,and the measuring instruments. Then, we present severalexamples to show the operation and testing procedure andstability of the test system. Last, the experiment plan matrix andanalysis methodology are presented, which will be applied inthe next-phase experiment. The fulfillment of active mechanismand test methodology with a closed absorption chiller forperformance analysis can be references in similar thermalapplications.
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