JPS6141969Y2 - - Google Patents

Description

[Detailed description of the invention] Generally, in the basic conceptual diagram of the Brayton cycle as shown in FIG. The output shaft 2' of is driven.

That is, in the compressor chamber a', the working fluid sucked through the suction pipe 3' is discharged from the discharge pipe 4'. The discharged working fluid is then heated to a heater 5'.
After heating it in the inlet tube 6', it is sent to the expander chamber b' through the suction pipe 6'.

Therefore, the amount of work performed by the working gas sent into the expander room b' is greater than the amount of work performed in the compressor room a', so even if the starter motor is turned off after startup, the fluid machine continues to operate and the drive shaft 2' Repeat rotation. Further, the working gas discharged from the expander chamber b' is cooled by the radiator 7' and then sucked into the compressor chamber a' via the suction pipe 3', and the working fluid flows as shown by the solid line arrow. This forms the Brayton cycle.

Generally, in order to improve energy efficiency and increase output in a Brayton cycle engine system, the heating temperature when reheating the high temperature, high pressure working fluid discharged from the compressor chamber a' is increased. Alternatively, there is a method of lowering the temperature of the working fluid drawn into the compressor chamber a'.

When raising the heating temperature, there is a limit in the heater 5', and there are cases where the temperature of the working fluid cannot be raised efficiently.

In addition, in the past, a radiator 7' was used to cool down the temperature of the working fluid being sucked in, but the working chamber, which is called the expander chamber b' after the working fluid has expanded, is heated by the energy released by the expansion. The temperature remains high. Therefore, even if low-pressure, low-temperature working fluid is sucked in from the radiator 7', the temperature of the working fluid will rise immediately, and this will be the same as sucking in high-temperature working fluid, reducing the energy efficiency of the engine. There were drawbacks such as:

In view of this, the present invention improves the energy efficiency of the engine by injecting moisture into the working chamber, which becomes hot during the expansion stroke, and cooling the working chamber through vaporization of the moisture. One embodiment will be explained based on FIG.
It has working chambers 10a and 10b divided by a and 9b, and one of these chambers is used as a compressor room a whose internal volume gradually decreases as the rotors 9a and 9b rotate, and the other chambers simultaneously whose internal volume gradually decreases. Expander room b becomes larger
5 is a heater that heats the high-temperature, high-pressure gas discharged from the compressor chamber a through the discharge pipe 4 and sends it to the expander chamber b through the suction pipe 6; 7 is the suction pipe; The expanded discharge gas is sucked in through the cooling fan 11 and further cooled using the cooling fan 12.
A radiator 14 is a pump that injects moisture separated from the radiator 7 into the working chamber at the end of the expansion stroke.

One embodiment of the present invention is constructed as described above, so when the rotors 9a and 9b are in the position shown in FIG. Gas is introduced from the heater 5 through the suction pipe 6, and the expansion stroke as the expander chamber b begins. Further, the working chamber 10b completes the expansion stroke as the expander chamber b, and a predetermined scavenging operation is performed by the blower 13 to replace the medium temperature, low pressure expanded gas in the working chamber 10b with the low temperature, low pressure uncompressed gas. At the same time, water is injected by the pump 14 to cool the inside of the working chamber 10b, and then the discharge pipe 11
It is discharged together with the scavenging gas and reaches the radiator 7, where it is cooled and the moisture is separated, and the moisture is again supplied to the pump 14 as shown by the dotted arrow.
Next, due to the expansion stroke in the working chamber 10a, the rotor 9
a and 9b rotate in the direction of the solid line arrow, and the predetermined scavenging and cooling in the working chamber 10b are completed, and the working chamber 10b becomes the compressor chamber b, and a compression stroke of low-temperature, low-pressure gas begins. Below, work rooms 10a, 10
b alternately moves to the compressor chamber a and the expander chamber b, and the fluid machine 1 operates and continues to rotate.

FIG. 3 shows another embodiment in which the present invention is applied to a multi-vane type. In the figure, 1" is a rotor 9" that has multiple vanes 15" inside a cylinder 8".
5" is a heater, 7" is a radiator, and 14" is a water injection pump whose one end is connected to the secondary side of the radiator 7" and the other end is connected to the cylinder 8". Therefore, the work chamber 10'' is cooled by injecting water with the pump 14'' at the same time as the expanded gas is discharged after the expansion stroke of the gas, which has become high pressure and high temperature by the heater 5'', is completed.

Note that the water injection is a spray, and the same effect can be obtained.

The engine of the present invention has a working chamber divided by a rotor installed inside the cylinder, and a compressor chamber that takes in and compresses working fluid, and a compressor chamber that heats the working fluid discharged from the compressor chamber and then expands it adiabatically. In a Brayton cycle engine system that works with an expander chamber that extracts output from the engine, a pump is installed to inject moisture into the working chamber after expanding the working fluid, so the temperature inside the working chamber after the expansion stroke can be controlled. Since the working chamber can compress the intake gas without raising the temperature of the intake gas, the power required for compression is reduced and the output is increased. In addition, since the main body of the aircraft is also cooled, heat escapes to the cold main body during the compression stroke, reducing the polytropic index and doubly reducing the power required for compression. Furthermore, by injecting water, the water acts as a lubricant and reduces wear on parts. Moreover, in systems that require scavenging, the gas temperature is lower, so the power required for the scavenging blower can be reduced, and the required flow rate of the circulation pump is extremely small, so its power consumption can be almost ignored, making it extremely effective in practice. It is something.

[Brief explanation of drawings]

FIG. 1 is a basic conceptual diagram of the Brayton cycle, FIG. 2 is a conceptual diagram of one embodiment of the present invention, and FIG. 3 is a conceptual diagram of another embodiment of the present invention. 8...Cylinder, 9a, 9b...Rotor, 1
0a, 10b...Working room, 14...Pump, a...
...compressor room, b...expander room.

Claims (1)

[Scope of utility model registration request] A compressor chamber in which a working chamber partitioned by a rotor installed inside the cylinder sucks in and compresses working fluid, and an expander which heats the working fluid discharged from the compressor chamber and then adiabatically expands it to extract output. 1. A Brayton cycle engine system for working with a chamber, characterized in that a pump is provided for injecting moisture into the working chamber after expanding a working fluid.