Optimization of Adsorption Dynamics in Adsorptive Heat Transformers: Experiment and Modeling
An “adsorbent-heat exchanger (Ad-HEx) unit is a core of any adsorptive heat transformer (AHT), and its efficient performance is of prime importance. In this paper, we present recent advances in understanding and trends in studying the adsorption dynamics in AHT. Dynamic experiments have been performed in small Ad-HEx units which closely imitate the conditions of isobaric stages of AHT when desorption (adsorption) is initiated by a fast jump (drop) of the temperature of a heat exchanger wall which is in thermal contact with the adsorbent layer (Large Temperature Jump Method, LTJM). All results concern configurations of Ad-HEx unit with one, two or four layers of loose adsorbent grains. Water, methanol and ammonia are used as adsorbates. Mathematical model of coupled heat and mass transfer during isobaric adsorption process has been used for detailed dynamical analysis and extracting the heat and mass transfer coefficients. Finally, several recommendations followed from the LTJ study have been validated with a prototype of adsorptive chiller (in ITAE-CNR). These tests clearly demonstrated that dynamic performance of AHT can be significantly improved by a proper management of AHT cycle dynamics. The most important findings and general regularities are summarized, illustrated and discussed in the paper.
adsorptive heat transformers adsorption dynamics coupled heat and mass transfer Large Temperature Jump method optimal adsorbent
Yuriy Aristov
Laboratory of Energy Accumulating Processes and Materials, Boreskov Institute of Catalysis, Russian Academy of Sciences, Pr. Lavrentieva 5, Novosibirsk, 630090, Russia
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-6
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）