Evaluation of thermo-kinetic and absorption characteristics of pure desiccants and desiccant mixtures

Mrinal Bhowmik, Sayan Haldar, K. Dharmalingam, P. Muthukumar, R. Anandalakshmi*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

10 Citations (Scopus)

Abstract

Air conditioning systems are used to control the air dry-bulb temperature and humidity level for human thermal comfort. In order to control the humidity level, air dry-bulb temperature needs to be brought down below its dew point temperature to condense out the moisture from the air. This eventually consumes a significant amount of total building energy in terms of electricity. Therefore, to minimize the energy consumption, researchers are stimulating their study towards an alternative latent heat load control system. In this regard, desiccant based sorption technologies are more effective compared to the conventional vapor compression system. Therefore, it is necessary to analyze the different desiccants' individual properties and their physical behavior in material perspective. In this study, an effort is devoted to explore the thermo-kinetic properties of pure LiBr, CaCl2, as well as their mixtures (LiBr: CaCl2 of 90:10; 85:15; 80:20 and 75:25) by X-ray diffraction (XRD), thermo-gravimetric (TG) and absorption rate, analyzes through numerous control experiments. The XRD study confirmed that peaks of CaCl2 and LiBr were shifted slightly for LiBr and CaCl2 mixtures due to interaction effects. The results of present investigation elucidated that mixtures of LiBr and CaCl2 showed less moisture regeneration cost than pure CaCl2 and all the mixtures revealed more rate of moisture absorption than pure LiBr and CaCl2. Further, 85:15 mixture of LiBr:CaCl2 showed higher rate of moisture absorption when compared to other prepared samples.

Original languageEnglish
Pages (from-to)1967-1971
Number of pages5
JournalMaterials Today: Proceedings
Volume26
DOIs
Publication statusPublished - 2019
Externally publishedYes
Event10th International Conference of Materials Processing and Characterization, ICMPC 2020 - Mathura, India
Duration: 2020 Feb 212020 Feb 23

Keywords

  • Absorption rate
  • CaCl
  • Desiccant mixtures
  • LiBr
  • TG-DSC analysis
  • XRD analysis

ASJC Scopus subject areas

  • Materials Science(all)

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