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.