A Clean Energy Generation System Also a Free Air Cooler

This paper presents the concepts of a clean energy generation system also referred to as a free air cooler. The system has many subsidiary generation units in-tandem disposed in a common wind tunnel, using the wind tunnel's air flow as common working fluid. Each unit has its own air compressor, air turbine, heat pump, and generator, and works independently. The air compressor extracts air from its preceding unit's turbine and thus renders the turbine's outlet pressure P4 and outlet temperature T4 to descend. Lower T4 triggers the turbine to produce more output work which is proportional to turbine inlet/outlet air temperature difference T34(=T3-T4) as T3 remains unchanged, therefore a net useful work is obtained as soon as ΔT34 becomes larger. Heat pumps carry in heat energy from the external high-temperature source to the low-temperature air (as the sink) in wind tunnel, thus offsetting the energy extracted by the turbines. When air heat pumps are deployed, all evaporators cool down the ambient air passing through them, so the system is a free air cooler, too. The wind tunnel is fully thermally insulated for nearly zero-heat-loss. Most significantly, this is a zero-carbon-emission and fuel needless system, working as a cold thermal engine and using breakthrough and patented [1] technology continuously generating non-intermittent renewable energy to achieve an efficacious climate solution.