Details

Autor(en) / Beteiligte

• Kim, Sun Hyung
• Cho, Kanghee
• Kim, Jong-Nam
• Beum, Hee Tae
• Yoon, Hyung Chul
• Lee, Chan Hyun

Titel

Improvement of cooling performance of water adsorption chiller by using aluminophophate adsorbent

Ist Teil von

• Microporous and mesoporous materials, 2020-12, Vol.309 (C), p.110572, Article 110572

Ort / Verlag

France: Elsevier Inc

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• We synthesized an aluminophosphate (AlPO4)-based adsorbent that shows great cooling performance when used in a water adsorption chiller as an adsorbent. This adsorbent is crystalline microporous (CHA-type structure) material, which is composed of aluminum, phosphine, and oxygen atoms. It shows high water adsorption capacity (0.3 gH2O gads−1) at 308 K under 12 Torr of water vapor pressure (typical adsorption conditions of the adsorption chiller), and almost zero adsorption capacity at 348 K under 42 Torr (typical desorption conditions). This adsorbent shows much larger working capacity between the adsorption and desorption steps than silico-aluminophosphate (SAPO4) adsorbent which has same physico-chemical properties as the AlPO4, except for the absence of silicon species in framework. The commercial water adsorbent, FAM-Z02 is known to have the same structure as this SAPO4. We confirmed that AlPO4 can be easily synthesized in a large scale with a high hydrothermal stability, and easily pelletized to 0.6–1 mm sphere-shaped particles. The present AlPO4 adsorbent was tested in lab-made water adsorption chiller with 5 kW scale, and it shows 523 W kg−1 of specific cooling power (SCP). This experimental value was in good agreement with SCP (513 W kg−1) derived from simulation. The SCP of the AlPO4 adsorbent is 28% larger than that of the SAPO4 adsorbent calculated from simulation. [Display omitted] •AlPO4-34 adsorbent exhibits high water adsorption capacity.•AlPO4-34 adsorbent adsorbing water vapor can be completely regenerated at 348 K.•Water adsorption chiller using AlPO4-34 adsorbent shows high cooling performance.