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raw · papers · ingested 2026-07-02

Zeolite-Water Adsorption Refrigeration System (Chachad & Bhadane, IJRITCC 2016)

confidence: medium

Source: https://ijritcc.org/download/conferences/ICMTEST_2016/ICMTEST_2016_Track/1462001780_30-04-2016.pdf

Source: Chachad & Bhadane, IJRITCC 2016 (open PDF). Credibility: Medium (low-tier conference proceedings, but the most reproducible recipe found; corroborated on cycle mechanics by higher-tier sources).

Key points

  • Safe refrigerant (water): two steel cylinders — Zeolite 4A + distilled water — joined by three valved pipes.
  • Charge: 0.6 kg zeolite, 500 mL water; uptake ~0.3 kg water/0.85 kg zeolite.
  • Evacuate: zeolite cylinder to full vacuum, water cylinder to 23 mbar (water boils at room temp); sequence valves so zeolite vapor-pumps the water.
  • Regenerate: heat zeolite to ~200 °C to drive water back.
  • Result: evaporator down to 9.8 °C, claimed COP ~0.4.
  • The cheapest safe demonstrator; masses + pressures + valve sequence all specified.