Overview
ClimbAir is a passive energy harvesting system that exploits thermal draft — the stack effect — by running a tube from lower to higher elevation along a slope, for example a mountainside. The temperature difference between the warm lower end and the cool upper end creates a pressure differential that drives air upward through the tube without any pump or fuel. A distributed network of microturbines placed along the tube converts that airflow into electricity. The appeal is simplicity and passivity: no fuel, no photovoltaics, no dependence on wind. The limitation is equally clear — at the 10-inch tube diameter currently modelled, friction dominates and collapses airspeed from a theoretical 36.7 m/s to a realistic 1.1–2.4 m/s.
Applications
Power generation for remote mountainous regions; supplementary off-grid power; educational and demonstrator installations; integration into hybrid solar-draft towers or vertical agriculture systems.
Operating Principle
Warm air from lower elevations enters a vertical or slope-aligned tube and rises, accelerating because of the temperature differential with the cooler upper end. The moving air column drives microturbines spaced at intervals along the tube, converting kinetic energy into electricity. No active pumping and no fuel input are required at any stage.
Limitations: friction losses dominate inside long, narrow tubes; each added turbine causes a pressure drop that further degrades flow; scaling is poor because output depends on diameter to roughly the 2.5 power, so a 10-inch tube cannot reach meaningful output regardless of length. Realistic designs require diameter above 1.3 m for 20+ kW.
Key Parameters
| Parameter | Value |
|—|—|
| Tube length | 14,000 m (14 km) |
| Elevation gain | 2,000 m |
| Tube diameter (modelled) | 10″ (0.254 m) |
| Temperature delta | 10–50 K (ambient to heated air) |
| Airflow speed, ideal | up to 36.7 m/s (theoretical) |
| Airflow speed, realistic | ~1.1–2.4 m/s (with friction losses) |
| Number of turbines | ~1,400 (spaced every 10 m) |
| Power per turbine | ~45 W theoretical max; 5–20 W realistic |
| Total power output | 0.1–30 kW depending on configuration |
| Diameter required for 20+ kW | >1.3 m |
Architecture and Components
Vertical or slope-aligned tube running from a lower to a higher elevation; distributed microturbines spaced along the tube interior (approximately every 10 m in the modelled configuration); electrical collection and conditioning. No pumps, fans, fuel supply or photovoltaic elements. Proposed revisions call for shorter modules of substantially larger diameter, optional solar collectors at the intake to boost draft, and modular tower geometry in place of a single long shaft.
Advantages
Technical: fully passive operation with no moving parts outside the turbines themselves, no fuel, no photovoltaics and no dependence on wind conditions; the driving force is a permanent terrain-and-temperature feature rather than an intermittent resource.
Operational: mechanically simple; suited to remote terrain where fuel logistics and grid connection are impractical.
Environmental: no emissions, no consumables, no combustion.
Integrations
GrapheneCell HX — storage for intermittent passive generation
AEROGRAPH (Graphene AeroGel) — insulation and solar boost for the draft column
Also related in principle to solar chimneys (solar-heated air columns), passive airflow turbines and thermal updraft towers with a central collector. Proposed hybrid: integration with solar collectors to raise the temperature delta, and capture of natural terrain winds rather than thermal gradient alone.
Deployment & Operation
Requires a site with sustained elevation gain and a reliable temperature differential between base and summit. Once installed, operation is passive and continuous with no fuel supply, no operator intervention and no daily routine. Before any build, geometry must be revised: the concept is physically sound but the current narrow-shaft configuration is not viable, and validation is needed with increased diameter, collector-assisted heating and modular tower construction.
TRL
TRL 3 — experimental proof-of-concept. The physics is sound, but the modelled 10-inch tube is not scalable to useful power output. Advancing requires validation with adjusted geometry: larger diameter, collector-assisted heating, and modular towers in place of a single 14 km shaft.
Market Potential
[требует уточнения из базы]
Typical Project Economics
CAPEX и OPEX по проекту не ведём — считаются под конкретную площадку.
Risk Factors
Friction dominates flow at the 10-inch tube scale, severely reducing airspeed and making the modelled output unrealistic. Energy expectations from narrow shafts are not supportable. Each turbine added imposes a pressure drop that degrades the flow driving the turbines downstream. Scaling is unfavourable — output depends on diameter to roughly the 2.5 power — so viable configurations demand large-diameter construction with correspondingly higher cost. Better use cases are shorter, wider modules with solar-collector assistance rather than long narrow tubes.
Related Technologies
GrapheneCell HX · AEROGRAPH (Graphene AeroGel) · Arbok-Wind · Arbok-Rotor-Wind · eWATT