JPS6036774Y2 - Power generation device using engine waste heat - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a power generation device that utilizes engine waste heat and is suitable as a power generator for engine-mounted equipment such as automobiles, tractors, civil engineering machines, and ships.

Conventional power generation devices directly utilize the rotational driving force of the engine to generate electricity, so it is necessary to increase the engine output by that amount, which increases fuel consumption, and exhaust gas is emitted from the exhaust pipe. Discarded externally as waste heat)
There was a large loss of energy because it was stored away.

The present invention utilizes this engine waste heat, that is, both exhaust gas and coolant, to generate electricity and effectively utilize the waste heat.

The present invention will be explained below with reference to an embodiment of the drawings. Reference numeral 1 denotes an engine, in which waste heat is generated by the explosion of fuel.

2 is a pipe through which coolant that has passed through the engine 1 and whose temperature has risen is circulated; 3 is an exhaust pipe for engine fuel gas; and 4 is a heat collector inserted into the liquid flow passage in pipe 2 for heat exchange. A pipe is connected to the container 5 in a closed loop, and a heat transport working fluid is sealed in the pipe.

Reference numeral 6 denotes a heat collector installed on the outer periphery of the exhaust pipe 3, which is a heat collecting plate 61, 62 made of a single plate curved with a small radius of curvature around the pipe 3, as shown in the cross-sectional view in FIG. ...
65, the ends of which are connected with hinges etc. are covered, and heat transport vibros such as heat pipes a, 6b, etc. are placed parallel to the longitudinal direction along the focal point (line) of each heat collecting plate. ...
...6e is provided.

The heat transport pipes are each connected in parallel or in series and coupled to the heat exchanger 7.

8 is a turbine generator for heat utilization, 9 is a turbine, and a steam flow is supplied from an evaporator inserted into the heat exchangers 5 and 7.

Reference numeral 10 denotes a cooler that cools and liquefies the steam that has passed through the turbine 9, and for cooling, the coolant before flowing into the engine 1 is circulated.

11 is a circulation pump for the working fluid, 12 is a heat exchanger, a switching device connects the circuit between 5 and 7 and the turbine 9, and 3 is a heat exchanger 5 and 7.
This is a circuit exchanger connecting the pump 11 and the pump 11.

The waste heat of the engine 1 is disposed of as liquid or gas, and the coolant whose temperature has increased after passing through the engine section flows through the pipe 2. At this time, it is heat exchanged and collected in the heat collector 4. Heat is supplied to heat exchanger 5.

On the other hand, the engine exhaust gas is exhausted from the pipe 3, and when passing through the exhaust pipe 3, the high-temperature gas acts on the wall of the pipe 3 to become red-hot and actively radiates heat rays such as far-infrared rays from the outer wall.

At this time, a heat collecting plate 61 provided so as to surround the outer periphery of the pipe
．． At 62.63..., the radiant heat ray is concentrated at its focal point, and a heat vibro at6b is placed on the focal line.

6c...... are provided, so that the heat collecting wires can transport heat to the heat exchanger 7 with high efficiency.

The heat exchangers 5 and 7 are configured not only to simply exchange heat but also to have a heat storage effect, and instead of storing heat, they exchange heat to evaporate the evaporator inserted inside.

Usually, the working medium that rotates the turbine 9 is ammonia,
Materials that are easily evaporated and liquefied, such as alcohol and freon, are used. This is easily evaporated by the evaporators inserted in the heat exchangers 5 and 7, and the steam flow is transferred to the turbine by controlling the switching device 12. 9 to operate the supply.

In FIG. 1, the switch 12, which is located at a position where both the heat exchangers 5 and 7 communicate with the turbine 9, is rotated counterclockwise by 90 degrees.
The switch 12 switches the heat exchanger 5 and the turbine 9 so that the heat exchanger 5 and the turbine 9 communicate with each other when rotated 90' clockwise, and vice versa. , 7 can be operated simultaneously, and the steam flow thus generated gradually increases the gas pressure and enters the turbine 9 for operation.

The action of the turbine 9 turns the generator 8 to generate electricity, and the steam that has passed through the turbine 9 reaches the cooler 10 where it is liquefied.This liquid is sent out again by the pump 11, and as shown in FIG. When the switch 13, which is located at the position where both and the pump 11 are connected, is rotated 90 degrees clockwise,
Heat exchanger 5 and pump 11 communicate with each other, and when the heat exchanger 7 and pump 11 communicate with each other and rotate 180 degrees, the heat exchanger 7 and pump 11 communicate with each other, so that the heat exchanger 5, 7 is supplied to either or both of the heat exchangers 5 and 7, and vaporized again. to rotate the turbine 9.

In this way, the working medium circulates between the evaporator, the turbine, and the cooler, converting the collected heat energy into rotational energy of the turbine, which is then converted into electrical energy by the generator.

The heat collection temperature of the heat exchangers 5 and 7 can normally be easily raised to about 60 to 100°C, and if Freon or the like is used as the working medium of the turbine, this can be easily raised in the heat exchangers. It can be rapidly vaporized to generate electricity with high efficiency.

For example, in a 300)P tractor, the fuel consumption is approximately 700KW per hour, and approximately 200)P of energy can be extracted, and the conventional engine efficiency was about 30% or less, but by using waste heat, it has been reduced to approximately 50%. I was able to increase it.

In this way, the efficiency of conventional diesel engines, etc. is generally 30
% or less, and 60-70% of the energy was wasted as waste heat), but this invention uses this waste heat to generate electricity, so it can be used with a power generation efficiency of about 15-20%. Therefore, a high efficiency engine of 45 to 50% can be provided as a whole.

In addition, waste heat is utilized by installing heat exchangers for both the engine coolant and the exhaust gas, and using a switch to switch between using one or both to turn the turbine and generate electricity. Therefore, even if the power used is different when driving a car at night and during the day, the power generation capacity can be sufficiently covered by switching, making it convenient and highly effective as a power generation device that utilizes waste heat.

Therefore, according to the present invention, by converting waste heat into electricity and using it, efficiency is improved, fuel consumption is reduced, and power can be increased.

In addition, the effect is greater as the amount of exhaust gas is reduced and pollution is reduced by saving fuel and increasing power.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a partially enlarged sectional view thereof.

Claims (1)

[Scope of utility model registration request] A heat exchanger 5 in which a heat collector 4 is provided in the coolant circulation pipe 2 of the engine 1 and a heat exchanger 7 in which a heat collector 6 is provided in the exhaust pipe 3
and a switching device 12 for the heat exchanger 5 and 7 that utilizes either or both of the heat exchangers and a switching device 13 for the working fluid, and a switching device for the heat exchangers 5 and 7. A power generation device that utilizes engine waste heat, in which a working fluid is switched and supplied to a heat exchanger selected by a working fluid switch 11, and the steam flow of the working fluid is used to rotate a turbine and generate electricity.