The PI-Generator is essentially a clean, environmentally friendly, energy generator.
It uses the physics notion of a convection current to generate energy by placing turbines
in the path of the gas being force-convected with pumps and pressurizers.

The PI-Generator (patent pending) concept, was based on an energy generator for the moon, which uses the temperature gradient found on the moon, to cool and heat nitrogen gas. On earth, ambient temperature and refrigeration units must be used.

ThePI-Generator is built in several sections, a turbine section, a cooling and heating zone, a liquefaction section, a suction zone, and a pressurizer section. The energy generating section is the turbine section. It is preferably cylindrical; and, is where turbines are spaced from 5 to 20 meters. The liquefaction section is where nitrogen compressors or thermo-acoustic engines are housed. Depending on the number of compressors or engines required, the liquefaction section can be 50 to 100 meters in length. The cooling zone is used to remove as much as the heat from the heated nitrogen gas, and can range from 50 to 200 meters in length, depending on the efficiency of the heat extractor. The heating zone is used to remove cold from the liquefied nitrogen, and can also range from 50 to 200 meters in length. The pressurizer zone is where the nitrogen gas is re-pressurized to a given PSI and fed to conduits before exiting into the turbine section ( Patent Pending ).


Cylindrical Chamber

The PI-Generator uses a cylindrical chamber of 3.2 meters in diameter. The diameter may increase, based on the number of liters of nitrogen which can be liquefied per minute. The chamber is made of polyvinyl chloride (PVC) or metal (iron or aluminum). Its length may vary from a few meters to tens of kilometers. It may buried, and is installed on bases. Some of the bases are used to house turbine gearings ( Patent Pending ).


Nitrogen Gas

Nitrogen gas is used because it is abundant, easily extracted from the air we breathe; and it is relatively non-toxic. A large release of nitrogen gas into the atmosphere would not be too much of an environmental problem. It is also used to prevent corrosion in iron pipes.


Compressors

Nitrogen compressors, or other types of cooling engines, are required, to liquefy a certain amount of nitrogen, to satisfy the speed requirements of the generator's turbines. For a five meters per second speed, the required amount of nitrogen gas that must be moved per second, is equivalent to the volume in a 5 meters section of the 3.2 diameter cylindrical chamber. One or many liquid nitrogen storage tanks are located under the liquefaction units, and/or thermo-acoustic engines.


Heating Zone

The heating zone is used to remove cold from the liquefied nitrogen. It ranges from 50 to 200 meters in length. It can be used to provide air-conditioning in tropical and sub-tropical countries.
Water pipes are run through a 200 meters section of flowing cooled nitrogen to provide the air-conditioning. The heating zone can also be exposed to the warm ambient temperature of tropical and sub-tropical countries ( Patent Pending ).


Cooling Zone

The cooling zone is used to remove heat from the heated nitrogen gas. It ranges from 50 to 200 meters in length. It is very dependent on the efficiency of the heat extractor. The possible heat extractors are thermo-electric generators, thermo-acoustic or thermo-tunneling heat exchangers.
The cooling zone is the collection area for the heated nitrogen gas before it enters the liquefaction section. The cooling and the liquefaction zone can be merged, if means of extracting heat are deemed to costly and not sufficiently efficient. The preferred means of cooling is the thermo-acoustic engine. A thermo-acoustic engine can also generate energy to power the nitrogen compressors, the suction pump, and the pressurizer; therefore allowing the PI-Generator to run with zero input of energy. The cooling zone may obviate the need for compressors; if liquefaction of the nitrogen can be achieved, and the input in electricity is low; otherwise, the compressors may be used to do the work for both the cooling and the liquefaction zones (  Patent Pending  ).


Suction Zone

The suction zone is placed between the turbine section and the cooling zone; and, is used to facilitate the movement of the heated nitrogen gas. Movement is facilitated because of the pressure differential that is created, as the nitrogen gas gets cooled (  Patent Pending ).


Turbines

The turbines, which are used in the chamber, are computerized and dynamic; and, are of several designs. Horizontal and vertical axis turbines are placed at the center of the chamber. Their design allow a certain amount of nitrogen to flow freely past their blades. Vertical axis turbines would consist of blades that open to harness the air pressure of the moving mass of nitrogen; and close to provide a pass-through to some of the said mass. Each oddly-placed horizontal turbine would rotate in counter-clockwise fashion. The other type of turbines would be placed at the periphery of the chamber, and the nitrogen mass is thus provided, as the space to move, the center of the chamber. The cut-in speed of a turbine is 2.0 meters per second and the cut-out speed is 35 meters per second. Neodymium-based magnets are used to build free floating turbines, where most of the friction is found at the gears (  Patent Pending ).


Pressurizer Zone

The pressurizer zone is placed between the turbine section and the heating zone; and, is used to provide the speed required to achieve, at a minimum, the cut-in speed of the turbine. Conduits are used to increase the exit speed of the gas into the turbine section. The point of exits of the gas into the chamber can be staggered along the first few hundred meters, so as to avoid damaging the turbines at the front, if the exit speed achieved is higher than a turbine's cut-out speed. The conduits system is heated in order to prevent cold nitrogen gas from entering the turbine section
 (  Patent Pending  ).


Summary

A 5 kilometer generator with a 4.5 kilometer turbine section can house 225 to 900 turbines, depending on their design. If each turbine is able to generate from 0.5 to 3.5 KW/hour of electricity; then a generator would be able to produce from 544.5  to 22,788.0  MW/Year of electricity. If we take into account the added air-conditioning; then, the actual real-world estimate in produced electricity can practically be doubled.


Adjuncts

An adjunct to this patent is the alternative of just using a fan of the start of the turbine section, and a suction pump as the other end. The energy required to power the fan and the suction pump must not exceed 10 percent of the total KW/hour of electricity that can be generated by the generator.

An second adjunct to this patent is a version without air-conditioning; where a suction pump is also used; and, the atmospheric pressure in the collection chamber is maintained without the need for compressors. The compressors may be required if an acoustic chamber is used.

A third adjunct to this patent refers to the reduced version of the PI-Generator, 1 to 20 meters in length; where the cool zone and compressors are replaced by a thermo-acoustic or thermo-tunneling refrigeration/liquefaction unit and a heat radiator. The heating zone and the pressurizer are merged. The turbine section may contains one or many turbines. The radiator is built as to prevent the liquid nitrogen in the storage tank from being depleted, by allowing pass-thru nitrogen gas.

A fourth adjunct to this patent refers to the space-based reduced version of the PI-Generator; where the cool zone and compressors are replaced by the cold of space and a heat radiator. The heating zone and the pressurizer are merged, and are oriented towards the sun. The turbine section may contains one or many turbines. A gyro system is required to maintain a proper orientation in space.
 
Patent Pending

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