Commercial Adsorption Chillers — Vendors, Specs & Deployments
Commercial Adsorption Chillers — Vendors, Specs & Deployments
What you can actually buy today. The adsorption-chiller market is a small (~USD 215 M, 2025), slow-growing (~3.6 %/yr) niche, and every commercial machine still runs on silica gel or zeolite with a water (R718) refrigerant — not the lab MOFs. This article maps the current vendors, their model specs and driving temperatures, and the real installations that prove the technology in the field. For the physics see Adsorption Cooling; for the quantitative envelope see Performance & Numbers.
The market shape
The market is USD 215.4 M (2025) → USD 306.8 M (2035), CAGR 3.6 % — a genuine but slow-growing niche, driven mostly by industrial waste-heat recovery (chemicals ~35 %, food ~25 %, oil & gas ~20 %), with the fastest growth in China (4.8 %) and India (4.5 %). Named incumbents: Hitachi (~24 % share), Johnson Controls/YORK, Fahrenheit, Bry-Air, Thermax, Kawasaki Thermal Engineering, Panasonic, Ebara, Carrier, Inoplex, Berg. Crucially, the market analysis contains zero MOF mentions — what ships today is silica gel and zeolite. That gap is the subject of the MOF-commercialization discussion in Performance & Numbers.
Vendors and product lines
| Vendor | Product line | Working pair | Capacity | Driving temp | COP |
|---|---|---|---|---|---|
| Fahrenheit GmbH (ex-SorTech) | eCoo S / 20 ST / 20X / 30 / 30X / 40X | Silica gel (or zeolite) + water (R718) | ~10 kW (eCoo S) → tens of kW per module | 50–95 °C (from 50 °C) | ~0.35–0.6 |
| InvenSor GmbH | LTC 10 e plus / LTC 30 e plus / HTC 18 plus | Direct-coated zeolite + water | ~10 / 10–35 / 18 kW | 45–100 °C (LTC from ~50 °C; HTC from 85 °C) | 0.52 nom, up to 0.75 |
| Bry-Air / Pahwa | BryChill | Silica gel (BRYSORB 200) + water | 11–35 kW; industrial to 1180 kW | 50–100 °C (regen from 60 °C) | not published |
| Mitsubishi Chemical | AQSOA Z01/Z02/Z05 (adsorbent, not a chiller) | Aluminophosphate zeolite | OEM material | low regen (<90 °C; Z01 best ~60 °C) | — |
Notes:
- InvenSor distinguishes itself with direct-coated zeolite beds and the highest catalog COP (up to 0.75), plus a dedicated HTC line tuned for high ambient temperatures (>40 °C) — directly relevant to the hot-day derating problem (see Limitations & Mitigations).
- Fahrenheit’s eCoo cooling modules have no moving parts; the eCoo S brings the entry point down to a refrigerator-sized 10 kW unit.
- AQSOA is the adsorbent that makes low-regeneration-temperature machines possible; it is supplied into OEM chillers rather than sold as a chiller.
- Vehicle/mobile adsorption A/C is an active patent space: OxiCool Inc. (US Patent 9,765,998 B2) covers a zeolite/water two-bed vehicle cooler with a “winterization” configuration that stores water inside the crystalline adsorbent to prevent freeze damage, desorbed by engine-exhaust waste heat — the same niche the automotive AQSOA-Z02 research targets (see Adsorbent Bed Engineering).
What’s coming: advanced-sorbent R&D
The clearest pre-commercial effort is the EU DYMAN project (EIC Pathfinder, 10 partners incl. Sorption Technologies GmbH, the SorTech successor). It is developing low-temperature adsorbents that work below 50 °C driving temperature — below even the EMM-8 regime — and 3D-printed adsorption heat exchangers that embed sorbent into a porous structure to cut internal thermal resistance. As of mid-2026 it is at chiller-prototype stage, pre-commercial. The target application is data-center cooling from waste heat.
Field deployments (measured, not rated)
Real installations matter because rated COP and measured COP diverge, and because climate and driving temperature dominate performance.
- CoolMUC-2 — Leibniz Supercomputing Centre (Munich). Six SorTech eCoo 2.0 silica-gel/water chillers driven by hot-water-cooled HPC racks (384 Lenovo NeXtScale nodes) — the only Top500 production HPC system combined with adsorption refrigeration. Measured 2016: ~120 kW waste heat at 45 °C → ~50 kW cooling at 21 °C, with an electrical COP ~12 (cooling delivered per kW of electricity), roughly 2–3× a mechanical chiller. The standout is the very low 45 °C driving temperature — most adsorption chillers want 65–90 °C. Operated nine years (decommissioned Dec 2024).
- iDataCool — University of Regensburg + IBM. 216 hot-water-cooled nodes; ~70 °C coolant drove an InvenSor LTC 09. Measured chiller COP rose ~90 % going from 57 °C to 70 °C driving temperature — a concrete sensitivity curve — and ~25 % of input energy was reusable as cooling. Lesson learned: poor rack thermal insulation caused major heat loss; designing insulation early could roughly double the reuse fraction.
- KACST adsorption desalination + cooling — Riyadh. A megawatt-scale demonstration producing up to 1 MW cooling and up to 100 m³/day desalinated water from the same waste-heat cycle (see the desalination cogeneration discussion in Performance & Numbers).
See Also
- Adsorption Cooling — the physics and cycle these machines implement
- Performance & Numbers — COP/SCP envelope, working pairs, MOF commercialization status
- Limitations & Mitigations — why COP is low and how vendors fight derating
- Solar Adsorption Cooling — the same two-bed hardware, solar-fed
- Absorption Cooling — absorption chillers (Yazaki, Thermax) share this thermally-driven market
- Cooling Technologies Overview — where adsorption sits among cooling technologies
Sources
- InvenSor LTC/HTC datasheets — zeolite/water model specs, COP, driving temps
- Fahrenheit eCoo lineup — silica-gel/water model lineup, LRZ reference
- Bry-Air BryChill — BRYSORB 200 silica gel, industrial capacity range
- Adsorption Chillers Market 2025–2035 — market size, incumbents, no-MOF baseline, AQSOA note
- DYMAN project — sub-50 °C adsorbents, 3D-printed heat exchangers
- Data-center adsorption deployments — CoolMUC-2 and iDataCool measured performance
- OxiCool adsorption cooling patent (US 9,765,998 B2) — zeolite/water vehicle cooler, winterization configuration