Energy Production
DEEPCOOL lifts large volumes of cold deep water to the surface using the natural equalization of levels in communicating vessels, with a pneumatic system discharging the deep water out of the unit.
Technology brief
DEEPCOOL lifts large volumes of cold deep water to the surface using the natural equalization of levels in communicating vessels, with a pneumatic system discharging the deep water out of the unit.
The challenge
1. Coral reefs and eco-tourism. Mass bleaching, biodiversity loss and falling tourism revenue in the Maldives, Hawaii, the Caribbean and the Florida Keys. Local cooling of the water around a reef during the critical weeks of the hot season.
2. Aquaculture (salmon, shrimp, tuna). Overheating of cages — salmon in Norway and Chile, shrimp in South-East Asia, tuna in Japan — causes oxygen stress and mass die-off. Deep-water supply cools the cage and raises dissolved oxygen and nutrient inflow.
3. Energy and infrastructure (thermal and nuclear plants). Coastal plants discharge warm water, overheating bays and incurring fines, lawsuits and capacity restrictions. Cold make-up water from depth dilutes the discharge zone instead of building new cooling towers.
Additional directions. OTEC coupling — selling both cooling and energy; carbon ("blue") credits — cold upwelling brings nutrients, grows plankton and increases CO₂ capture; agricultural zones and desalination — in coastal deserts cold water provides greenhouse conditioning and irrigation through heat exchangers; local hot spots — ports, industrial effluent, overheated areas.
Target pilots named in the source: (1) a reef site of 0.1–1 km²; (2) an aquaculture zone or port; (3) a hot spot at a thermal plant. Reef pilots in Hawaii, salmon-farm trials in Norway, a power-plant contract in Florida or Turkey.
ARBOK solution
DEEPCOOL lifts large volumes of cold deep water to the surface using the natural equalization of levels in communicating vessels, with a pneumatic system discharging the deep water out of the unit. At depth the water sits at about +4 °C; at the surface it is +28–32 °C, and that contrast drives the flow. The unit needs no external energy: the air pump draws 200–250 W from an ordinary solar panel, there are no moving parts, and the system runs in a closed cycle without operator intervention.
The technology was originally developed by the Arbok team to enrich the ocean surface and suppress hurricane formation, first of all in the Caribbean, by cooling the upper 20–60 m of the storm zone by 1–2 °C so the cyclone would weaken. That task was solved in principle but proved impossible to scale economically. Arbok therefore shifted the same technology to shallower depths of 100–200 m and to local targets: reef cooling during heat stress, aquaculture cages, and hot spots such as ports, warm-effluent discharge zones and thermal/nuclear plant outfalls.
Two elements do the work:
Water-lift. Artificial upwelling raises cold, nutrient-rich deep water to the surface on the equilibrium-of-liquids principle in communicating vessels. Under the action of the denser surrounding liquid the mixture rises, lifting water from depth; the water fills a tank floating on the sea surface — specifically a compact, container-sized vertical tank designed for shipping and rapid site placement.
Airpump. A pump using compressed air discharges the cold water out of the unit automatically, creating an air-water mixture of lower density.
The system uses no external energy: a solar panel feeds the Airpump. It works in a closed cycle without operator intervention.
Limitations stated in the source. Lifting water from 1–3 km carries heavy wear: the extreme hydrostatic pressure encountered at those depths, bending loads from currents, biofouling, cavitation and material fatigue in the long vertical pipe all greatly complicate operation of a deep-lift system. Calculations showed the practical depth for cold-water lift is down to about 200 m (the classic "Salter Sinks" range). Beyond that: the mixed layer is rapidly stirred by wind, upwelling and advection disperse the temperature anomaly, and after a cyclone passes the surface water can reheat quickly in the sun.
Verdict on the hurricane application. The threshold for formation and intensification of tropical cyclones is around 26.5 °C, and Arbok technology can bring a local volume of surface water to that temperature. Cooling large areas to or below that threshold artificially is, in the wording of the source, practically unreal.
> Note on source discrepancy: the analytical part of the source material concludes that cooling large areas is "practically unreal," while a separate, narrative part of the same material frames it differently: "technically, cooling surface water even over large areas is achievable — economically, it is harder." Both framings are retained as documented.
Market and application
Reefs and eco-tourism: $30+ billion/year. Aquaculture: >$200 billion/year globally. Cooling of thermal and nuclear plant waters: $50+ billion/year. Every mass reef bleaching event costs tourism $10–15 billion; preserving a reef preserves a tourist flow worth $50–100 million/year per island. Blue carbon credits are named as an emerging market Arbok can enter, with the source noting the direction is still disputed.
Reef site. Container-sized module, a pipe sized to reach the site's working depth, pumping system. CAPEX ~$0.5 million per unit. Output ~500 t/h of cold water. Effect: cooling of a reef section for the hot season, 6–8 weeks, over 0.5–1 km². ROI 1–2 years.
Aquaculture. 1 module per cage, CAPEX ~$0.3 million, OPEX <$10k/year. A 10% reduction in fish mortality on a farm with $20 million turnover saves $2 million/year. ROI under 3 months — payback within a season.
Thermal/nuclear plant. A modular array of units sized to the plant's discharge volume, CAPEX ~$5–7 million. Discharge cooled by 2–3 °C. Savings from reduced fines and extended cooling-system life: $20–50 million/year per station, plus avoided CAPEX of hundreds of millions on new cooling towers. ROI 1–2 years.
Use cases
1. Coral reefs and eco-tourism. Mass bleaching, biodiversity loss and falling tourism revenue in the Maldives, Hawaii, the Caribbean and the Florida Keys. Local cooling of the water around a reef during the critical weeks of the hot season.
2. Aquaculture (salmon, shrimp, tuna). Overheating of cages — salmon in Norway and Chile, shrimp in South-East Asia, tuna in Japan — causes oxygen stress and mass die-off. Deep-water supply cools the cage and raises dissolved oxygen and nutrient inflow.
3. Energy and infrastructure (thermal and nuclear plants). Coastal plants discharge warm water, overheating bays and incurring fines, lawsuits and capacity restrictions. Cold make-up water from depth dilutes the discharge zone instead of building new cooling towers.
Additional directions. OTEC coupling — selling both cooling and energy; carbon ("blue") credits — cold upwelling brings nutrients, grows plankton and increases CO₂ capture; agricultural zones and desalination — in coastal deserts cold water provides greenhouse conditioning and irrigation through heat exchangers; local hot spots — ports, industrial effluent, overheated areas.
Target pilots named in the source: (1) a reef site of 0.1–1 km²; (2) an aquaculture zone or port; (3) a hot spot at a thermal plant. Reef pilots in Hawaii, salmon-farm trials in Norway, a power-plant contract in Florida or Turkey.
Floating anchored module at 100–200 m depth, one module per aquaculture cage, a modular array of units sized to the discharge volume of a power-plant zone. Solar-powered, closed cycle, no operators. Pilot programme structure: reef site of 0.1–1 km², aquaculture zone or port, hot spot at a thermal plant — each with control metrics on SST, oxygen, nutrients, phyto/zooplankton and turbidity. Environmental design is stated as mandatory in the OTEC-coupled configuration.
Installation procedure, mooring specification and service intervals are maintained in Arbok's internal engineering documentation and are not reproduced here.
OTEC (Ocean Thermal Energy Conversion) — coupling turns cooling into an energy product as well. SkyManager-CO₂ / SkyManager climate platform — the source states that while improving the SkyManager climate technology, Arbok plans to merge three technologies into a single system with a more stable and guaranteed effect, with no analogue in the world. Arbok's own flow-and-temperature-difference generation systems. Carbon credit certification with fixed accounting of utilized CO₂, allowing a nuclear plant that installs cooling to obtain additional CO₂ quotas, avoid fines, or sell the quotas. Desalination and greenhouse heat exchangers in coastal deserts.
DEEPCOOL lifts large volumes of cold deep water to the surface using the natural equalization of levels in communicating vessels, with a pneumatic system discharging the deep water out of the unit. At depth the water sits at about +4 °C; at the surface it is +28–32 °C, and that contrast drives the flow. The unit needs no external energy: the air pump draws 200–250 W from an ordinary solar panel, there are no moving parts, and the system runs in a closed cycle without operator intervention.
The technology was originally developed by the Arbok team to enrich the ocean surface and suppress hurricane formation, first of all in the Caribbean, by cooling the upper 20–60 m of the storm zone by 1–2 °C so the cyclone would weaken. That task was solved in principle but proved impossible to scale economically. Arbok therefore shifted the same technology to shallower depths of 100–200 m and to local targets: reef cooling during heat stress, aquaculture cages, and hot spots such as ports, warm-effluent discharge zones and thermal/nuclear plant outfalls.
1. Coral reefs and eco-tourism. Mass bleaching, biodiversity loss and falling tourism revenue in the Maldives, Hawaii, the Caribbean and the Florida Keys. Local cooling of the water around a reef during the critical weeks of the hot season.
2. Aquaculture (salmon, shrimp, tuna). Overheating of cages — salmon in Norway and Chile, shrimp in South-East Asia, tuna in Japan — causes oxygen stress and mass die-off. Deep-water supply cools the cage and raises dissolved oxygen and nutrient inflow.
3. Energy and infrastructure (thermal and nuclear plants). Coastal plants discharge warm water, overheating bays and incurring fines, lawsuits and capacity restrictions. Cold make-up water from depth dilutes the discharge zone instead of building new cooling towers.
Additional directions. OTEC coupling — selling both cooling and energy; carbon ("blue") credits — cold upwelling brings nutrients, grows plankton and increases CO₂ capture; agricultural zones and desalination — in coastal deserts cold water provides greenhouse conditioning and irrigation through heat exchangers; local hot spots — ports, industrial effluent, overheated areas.
Target pilots named in the source: (1) a reef site of 0.1–1 km²; (2) an aquaculture zone or port; (3) a hot spot at a thermal plant. Reef pilots in Hawaii, salmon-farm trials in Norway, a power-plant contract in Florida or Turkey.
Two elements do the work:
Water-lift. Artificial upwelling raises cold, nutrient-rich deep water to the surface on the equilibrium-of-liquids principle in communicating vessels. Under the action of the denser surrounding liquid the mixture rises, lifting water from depth; the water fills a tank floating on the sea surface — specifically a compact, container-sized vertical tank designed for shipping and rapid site placement.
Airpump. A pump using compressed air discharges the cold water out of the unit automatically, creating an air-water mixture of lower density.
The system uses no external energy: a solar panel feeds the Airpump. It works in a closed cycle without operator intervention.
Limitations stated in the source. Lifting water from 1–3 km carries heavy wear: the extreme hydrostatic pressure encountered at those depths, bending loads from currents, biofouling, cavitation and material fatigue in the long vertical pipe all greatly complicate operation of a deep-lift system. Calculations showed the practical depth for cold-water lift is down to about 200 m (the classic "Salter Sinks" range). Beyond that: the mixed layer is rapidly stirred by wind, upwelling and advection disperse the temperature anomaly, and after a cyclone passes the surface water can reheat quickly in the sun.
Verdict on the hurricane application. The threshold for formation and intensification of tropical cyclones is around 26.5 °C, and Arbok technology can bring a local volume of surface water to that temperature. Cooling large areas to or below that threshold artificially is, in the wording of the source, practically unreal.
> Note on source discrepancy: the analytical part of the source material concludes that cooling large areas is "practically unreal," while a separate, narrative part of the same material frames it differently: "technically, cooling surface water even over large areas is achievable — economically, it is harder." Both framings are retained as documented.
| Parameter | Value |
|---|---|
| Unit format | container-sized vertical floating tank, built for shipping and rapid deployment |
| Throughput per module | ~500 t/h of cold water |
| Power consumption | 200–250 W, from a solar panel; no moving parts, practically zero energy cost |
| Deep-water temperature | about +4 °C at 1–3 km |
| Surface temperature | +28–32 °C |
| Practical working depth | 100–200 m, water at 10–12 °C |
| Pipe length in reef scenario | sized to reach the site's working depth |
| Original deep-lift target depth | 1–3 km and more |
| Cyclone formation threshold | 26.5 °C surface temperature |
| Layer to be cooled for storm suppression | upper 20–60 m, by ~1–2 °C |
| Mixed-layer basis of calculation | h ≈ 50 m (typical for the tropics before a storm) |
| Cold water needed to cool 1 m² by 1 °C | ≈ 1,970 kg (~1/26 of the mass of the warm column, at ≈ 4 °C) |
| Cold water needed to cool 1 km² by 1 °C | ≈ 2 million tons |
| Time for one 500 t/h unit to cool 1 km² by 1 °C | ≈ 164 days of continuous operation (excluding horizontal transport and solar reheating) |
| Flow needed to cool 10,000 km² within 48 h | ≈ 4.1×10⁸ t/h — hundreds of thousands of 500 t/h units |
| Pressure at 1–3 km depth | extreme hydrostatic pressure, a principal driver of deep-lift engineering wear |
| Reef module CAPEX | ~$0.5 million per unit |
| Reef area cooled per module | 0.5–1 km² |
| Reef cooling effect duration | the hot season, 6–8 weeks |
| Reef application ROI | 1–2 years |
| Reef market potential | $30+ billion/year |
| Aquaculture module CAPEX | ~$0.3 million, 1 module per cage |
| Aquaculture OPEX | <$10k/year (maintenance, monitoring) |
| Aquaculture cage cooling | 0.5–1 °C, plus raised oxygen level |
| Aquaculture stock loss without cooling | up to 20–30% of the harvest |
| Aquaculture benefit | 10% lower fish mortality on a farm with $20 million turnover = $2 million/year saved |
| Aquaculture ROI | <3 months (one season) |
| Aquaculture market | >$200 billion/year globally |
| Power-plant configuration | modular array of units, sized to match the plant's discharge volume |
| Power-plant CAPEX | ~$5–7 million |
| Discharge temperature reduction | 2–3 °C |
| Power-plant savings | $20–50 million/year per station |
| Power-plant ROI | 1–2 years |
| Power-plant market potential | $50+ billion/year |
| Tourism value preserved per island | $50–100 million/year |
> Note on source discrepancy: reef cooling is stated in the source both as "1–2 °C around a 0.5–1 km² reef" and, in a separate calculation scenario within the same material, as "cooling of a reef section by 0.5–1 °C over the hot season (6–8 weeks)." Both figures are retained as documented.
> Note on source discrepancy: the tourism damage from mass reef bleaching is given both as "$10–15 billion in tourism losses (using the Great Barrier Reef as an example)" and as "the Great Barrier Reef lost $15 billion from a single mass bleaching event." Both figures are retained as documented.
Surface installation in the form of a compact, container-sized vertical tank, floating on the sea. A pipe runs down hundreds of metres — kilometres if needed. Water-lift section working on communicating vessels. Airpump — a compressed-air system that discharges the lifted cold water beyond the unit automatically. Solar panel supplying 200–250 W to the Airpump. Anchoring and floating platforms, described in the source as available within budget at 100–200 m depths.
Control metrics specified for each pilot: SST, oxygen, nutrients, phyto- and zooplankton, turbidity.
Detailed component specification — pipe materials, mooring hardware and their engineering tolerances — is maintained in Arbok's internal engineering documentation and is not reproduced here.
No external energy: the unit consumes 200–250 W from a solar panel, has no moving parts and practically zero energy cost. No chemicals, no polluting machinery, no additional discharge — the process rests on purely natural physics. Closed cycle, no operator intervention. Modular, container-format, deployable per site.
At 100–200 m depths the engineering is described as sound: pipes withstand the loads, pumps and pneumatic systems are realistically serviceable, biofouling is controllable, anchoring and floating platforms are affordable. The effect is measurable on instruments: temperature falls, oxygen rises, fish do not die, corals do not bleach.
Combined with OTEC, where cold deep water is lifted for the cycle anyway, cooling can be treated as a by-product, lowering unit costs and risks. The source also notes Arbok has long-developed systems that generate electricity from water flow and temperature difference; combined with DeepCool the unit would generate energy instead of consuming solar power, but the question of what to do with that energy caused Arbok to defer the topic.
OTEC (Ocean Thermal Energy Conversion) — coupling turns cooling into an energy product as well. SkyManager-CO₂ / SkyManager climate platform — the source states that while improving the SkyManager climate technology, Arbok plans to merge three technologies into a single system with a more stable and guaranteed effect, with no analogue in the world. Arbok's own flow-and-temperature-difference generation systems. Carbon credit certification with fixed accounting of utilized CO₂, allowing a nuclear plant that installs cooling to obtain additional CO₂ quotas, avoid fines, or sell the quotas. Desalination and greenhouse heat exchangers in coastal deserts.
Floating anchored module at 100–200 m depth, one module per aquaculture cage, a modular array of units sized to the discharge volume of a power-plant zone. Solar-powered, closed cycle, no operators. Pilot programme structure: reef site of 0.1–1 km², aquaculture zone or port, hot spot at a thermal plant — each with control metrics on SST, oxygen, nutrients, phyto/zooplankton and turbidity. Environmental design is stated as mandatory in the OTEC-coupled configuration.
Installation procedure, mooring specification and service intervals are maintained in Arbok's internal engineering documentation and are not reproduced here.
TRL 4 — assigned 2026-08-06.
Formal TRL rating:
The source states the hurricane-suppression task was solved in principle, that calculations and experiments were carried out, and that pilot and model work identified the most promising directions. It also states that any R&D must pass the final stage from prototype to deployment, which DeepCool has not yet done.
Reefs and eco-tourism: $30+ billion/year. Aquaculture: >$200 billion/year globally. Cooling of thermal and nuclear plant waters: $50+ billion/year. Every mass reef bleaching event costs tourism $10–15 billion; preserving a reef preserves a tourist flow worth $50–100 million/year per island. Blue carbon credits are named as an emerging market Arbok can enter, with the source noting the direction is still disputed.
Reef site. Container-sized module, a pipe sized to reach the site's working depth, pumping system. CAPEX ~$0.5 million per unit. Output ~500 t/h of cold water. Effect: cooling of a reef section for the hot season, 6–8 weeks, over 0.5–1 km². ROI 1–2 years.
Aquaculture. 1 module per cage, CAPEX ~$0.3 million, OPEX <$10k/year. A 10% reduction in fish mortality on a farm with $20 million turnover saves $2 million/year. ROI under 3 months — payback within a season.
Thermal/nuclear plant. A modular array of units sized to the plant's discharge volume, CAPEX ~$5–7 million. Discharge cooled by 2–3 °C. Savings from reduced fines and extended cooling-system life: $20–50 million/year per station, plus avoided CAPEX of hundreds of millions on new cooling towers. ROI 1–2 years.
Scale limit on climate application. Hurricane suppression is out of reach of logistics and budget: cooling 10,000 km² within 48 hours would need ≈ 4.1×10⁸ t/h, i.e. hundreds of thousands of 500 t/h units, especially in the open ocean on a storm's path. The source calls the cynical arithmetic the thing that killed the dream.
Ocean physics works against the effect. The mixed layer is rapidly stirred by wind; upwelling and advection disperse temperature anomalies; after a cyclone passes, surface waters can reheat quickly in the sun.
Deep-lift engineering. At 1–3 km: the extreme hydrostatic pressure at those depths, bending loads from currents, biofouling, cavitation and fatigue of the long vertical pipe strongly complicate operation. This is why the working range was moved to 100–200 m and the climate-intervention project was left for the future.
Operational. Biofouling requires ongoing control even at shallow depths. Environmental design is mandatory in the OTEC configuration.
Commercial. Carbon credits require certification with fixed accounting of utilized CO₂, and the source itself calls the direction disputed for now. The technology has not passed the transition from prototype to field deployment.
Arbok Upwelling · SkyManager-CO₂ · ARBOK CleanSea · ARBOK-CoolTower · ARBOK Floating Plant
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