Power plants – Utilizing natural heat – Solar
Patent
1998-08-19
2000-06-20
Nguyen, Hoang
Power plants
Utilizing natural heat
Solar
415206, 415207, F01K 2700
Patent
active
06076354&
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to power generators driven by the heat extracted from the environment.
BACKGROUND ART OF THE INVENTION
The basic art of the invention has been described by the applicant in his international patent application No. PCT/AU94/00482 and published under No. WO 95/07410 on 16.3.95. This invention introduces new kind of constructions of power generators which are better applicable for general use.
SUMMARY OF THE INVENTION
The power generator, according to this invention, consists of a rotor by means of which power is generated by the heat extracted from a fluid which passes through specially formed channels incorporated in the rotor. Said channels have a converging inlet and a diverging outlet. Both said inlet and outlet are connected to each other by their corresponding narrow ends in which the flowing fluid reaches increased velocity when the rotor rotates. The reaction of momentum of the fluid caused by said increased velocity provides the force which drives the rotor and the fluid enters with said increased velocity into said diverging part of the channel in which the momentum of the fluid is absorbed along the channel by the downstream increasing pressure of the fluid. Whereby the fluid passing said diverging part of the channel converts its own heat directly into its mechanical energy, without involving any of the thermal cyclic processes which are used for such conversion today. Said mechanical energy equals the power generated. Consequently, the fluid issues from the rotor correspondingly cooled.
DESCRIPTION OF THE INVENTION
Following constructions of power generators in accordance with this invention will be now illustrated and described by way of example only with reference to the accompanying drawings in which:
FIG. 1 illustrates one of the rotor's channel for the purpose of clearly describing the concept of the invention.
FIG. 1a is a flow diagram of mechanical energy contained by the fluid while it passes the rotor.
FIG. 2 shows half of longitudinal section and half of side elevation of a power generator having fixed channels.
FIG. 3 is a cross section A--A shown on FIG. 2.
FIG. 4 shows half of longitudinal section and half of side elevation of power generator having adjustable channels.
FIG. 5 is a cross section B--B shown on FIG. 4.
FIG. 6 shows half of longitudinal section and half of side elevation of a power generator suitable for larger power output.
FIG. 7 is a cross section D--D shown on FIG. 6.
FIG. 8 shows half of longitudinal section and half of side elevation of a power generator having a diffuser rotating with the rotor.
FIG. 9 is a cross section F--F shown on FIG. 8.
In order to describe the concept of this invention clearly it is necessary to use some simple mathematical presentation and also to explain some symbols used in the description.
______________________________________ E = mechanical energy
m = mass of fluid passing
P = pressure of fluid channel in unit time.
V = absolute velocity of fluid
A = cross section area.
in relation to the ground.
q = density of fluid.
W = relative velocity of fluid
U = rotating speed.
______________________________________
FIG. 1 illustrates one of the channels, formed between rotor blades 4, through which a fluid flows when the rotor rotates. In order to determine how the fluid acts four points 0, 1, 2 and 3 have been selected. Point 0 depicts a stationary fluid external to the channel which rotates around point C. In line 1 are shown mechanical energies, per unit mass, of
In the following equation 1, there are shown the mechanical energies, per unit of mass, of the fluid at three points 0, 2 and 3, and it is here initially assumed that the said fluid is a liquid. /q+V.sub.3.sup.2 /2 1
Equations 2 show the value of V.sub.2 a.sub.2).sup.2 =U.sub.2.sup.2 +W.sub.2.sup.2 -2U.sub.2 W.sub.2 cos a.sub.2 2
Equation 3 shows the pressure difference between points 3 and 2; because the fluid discharges to external pressure, P.sub.3 =P.sub.0. +W.sub.2.sup.2 -W.sub.
REFERENCES:
patent: 1110302 (1914-09-01), Flatau
patent: 3930744 (1976-01-01), Theis, Jr.
patent: 3976389 (1976-08-01), Theis, Jr.
patent: 4150918 (1979-04-01), Theis, Jr.
patent: 4164845 (1979-08-01), Exley et al.
patent: 5046480 (1991-09-01), Harris
patent: 5143514 (1992-09-01), Adachi
patent: 5145317 (1992-09-01), Brasz
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