Energy Production
Arbok Nanofluid Collector replaces metal solar-thermal collectors with a graphene (thermo-expanded graphite, TEG) nanofluid that is both absorber and heat carrier — a Direct Absorption Solar Collector where the fluid itself captures sunlight in transparent tubes.
Technology brief
Arbok Nanofluid Collector replaces metal solar-thermal collectors with a graphene (thermo-expanded graphite, TEG) nanofluid that is both absorber and heat carrier — a Direct Absorption Solar Collector where the fluid itself captures sunlight in transparent tubes.
The challenge
Primary use cases: residential, hotel, and industrial domestic hot water; process heat; retrofit of legacy solar hot-water systems; roof/façade install.
Industries and users: homes, hospitality, industry, district heating.
Scale: 4 m² home to 50 m²+ industrial systems.
ARBOK solution
Arbok Nanofluid Collector replaces metal solar-thermal collectors with a graphene (thermo-expanded graphite, TEG) nanofluid that is both absorber and heat carrier — a Direct Absorption Solar Collector where the fluid itself captures sunlight in transparent tubes. It reaches 87–95 % efficiency (vs 40–50 % for copper/evacuated-tube systems), a +94 % heat-yield gain, with no copper, no corrosion, and ~30 % lower CAPEX. (Merges the former "GrapheneVoltaic Collector / Battery" — same technology.)
A stable TEG-nanoparticle dispersion in water (or glycol-water) absorbs sunlight directly throughout the fluid volume (α > 0.98), heating it in place — no metal absorber or fluid-interface conduction loss. Transparent polymer/borosilicate tubes admit light; heat goes to a standard tank via inline exchanger. Colloidal stability >1 000 h without sedimentation.
Limitations: long-term dispersion/UV stability; collector only (needs storage tank); field-scale validation in preparation.
Market and application
Solar water/process heat is a large global market held back by copper cost, corrosion, and ~9-year paybacks. Doubling efficiency, removing copper, enabling retrofit and low-irradiance use, with ~1.7–3-year payback, opens residential, hotel, and industrial demand.
50 m² system: 82 500 kWh/year (~€20 625/year at €0.25/kWh) vs baseline 42 500 kWh (€10 625); CAPEX €35 000 (vs €50 000); payback ~1.7 years; 10-year extra +400 000 kWh / €100 000+. Home (4 m²): ~6.6 kWh/day. (Per-site by area and irradiance.)
Use cases
Primary use cases: residential, hotel, and industrial domestic hot water; process heat; retrofit of legacy solar hot-water systems; roof/façade install.
Industries and users: homes, hospitality, industry, district heating.
Scale: 4 m² home to 50 m²+ industrial systems.
Steps: size collector area → install transparent-tube collector + TEG nanofluid → connect to tank → operate. Minimal maintenance (no corrosion/antifreeze); retrofit or new.
Retrofit to legacy solar hot-water systems or standalone; standard tanks/exchangers; roof/façade mounting; thermostatic/IoT control.
Arbok Nanofluid Collector replaces metal solar-thermal collectors with a graphene (thermo-expanded graphite, TEG) nanofluid that is both absorber and heat carrier — a Direct Absorption Solar Collector where the fluid itself captures sunlight in transparent tubes. It reaches 87–95 % efficiency (vs 40–50 % for copper/evacuated-tube systems), a +94 % heat-yield gain, with no copper, no corrosion, and ~30 % lower CAPEX. (Merges the former "GrapheneVoltaic Collector / Battery" — same technology.)
Primary use cases: residential, hotel, and industrial domestic hot water; process heat; retrofit of legacy solar hot-water systems; roof/façade install.
Industries and users: homes, hospitality, industry, district heating.
Scale: 4 m² home to 50 m²+ industrial systems.
A stable TEG-nanoparticle dispersion in water (or glycol-water) absorbs sunlight directly throughout the fluid volume (α > 0.98), heating it in place — no metal absorber or fluid-interface conduction loss. Transparent polymer/borosilicate tubes admit light; heat goes to a standard tank via inline exchanger. Colloidal stability >1 000 h without sedimentation.
Limitations: long-term dispersion/UV stability; collector only (needs storage tank); field-scale validation in preparation.
Efficiency: 87–95 % (vs 0.40–0.50 baseline); heat gain +94 %. Thermal conductivity up to 2 000 W/m·K (TEG phase). Daily output (4 m²): 6.6 kWh (vs 3.4). Annual yield (Central Europe): 1 650 kWh/m²·year (vs 850).
Nanofluid: TEG 20–50 ppm, α > 0.98, ζ > +30 mV, <$3/liter, stable >1 000 h. Operating 5–95 °C. Carrier: deionized or glycol-water; transparent polymer/glass tubing; no copper.
Transparent (polymer/borosilicate) tube collector; TEG nanofluid (absorber + carrier); circulation to standard tank with inline heat exchanger; polyurethane insulation; thermostatic/IoT control. No metal collector; retrofit-ready.
Technical: direct in-fluid absorption; up to 95 % efficiency; up to 2 000 W/m·K; no corrosion/antifreeze; maintenance-free nanofluid (no surfactants, stable for years).
Economic: CAPEX −30–40 % (no copper/vacuum tubes); 50 m² system €35 000 (vs €50 000); payback ~1.7–3 years (vs ~9); 10-year extra €100 000+ on a 50 m² system.
Environmental: 0 kg copper; ~24.75 t CO₂/year avoided (50 m²); ~247.5 t over 10 years; recyclable non-metallic components.
Strategic: low-cost, high-efficiency solar heat including low-irradiance regions.
Retrofit to legacy solar hot-water systems or standalone; standard tanks/exchangers; roof/façade mounting; thermostatic/IoT control.
Steps: size collector area → install transparent-tube collector + TEG nanofluid → connect to tank → operate. Minimal maintenance (no corrosion/antifreeze); retrofit or new.
TRL 7 (confirmed by Michael). Lab-validated (4 m² demo, 1 000+ h; +94 % heat gain; stable, no sedimentation); field pilot (pre-industrial) in preparation.
Solar water/process heat is a large global market held back by copper cost, corrosion, and ~9-year paybacks. Doubling efficiency, removing copper, enabling retrofit and low-irradiance use, with ~1.7–3-year payback, opens residential, hotel, and industrial demand.
50 m² system: 82 500 kWh/year (~€20 625/year at €0.25/kWh) vs baseline 42 500 kWh (€10 625); CAPEX €35 000 (vs €50 000); payback ~1.7 years; 10-year extra +400 000 kWh / €100 000+. Home (4 m²): ~6.6 kWh/day. (Per-site by area and irradiance.)
Nanofluid dispersion/UV lifetime at scale; transparent-tube durability; field-pilot validation pending; offtake/installer adoption vs entrenched copper systems.
AEROGRAPH (Graphene AeroGel) · eWATT · TEG-Blanket · TRISTONE (TEG-Electroliser)
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