RU56486U1 - FREE PISTON PNEUMATIC THERMOELECTRIC GENERATOR FOR DISPOSAL OF HEAT OF EXHAUST GAS ICE - Google Patents

Abstract

The proposal relates to mechanical engineering, namely to engine building and can be used to obtain additional effective power. The proposed Piston-free pneumatic thermoelectric generator for utilizing the heat of exhaust gases contains: cylinder 1, the upper part of which is surrounded by a cavity 2 with heat-accumulating material and a cavity 3 for passage of the exhaust gases of the internal combustion engine, an electric winding 4 is located on the lower part of the cylinder 1 for generating electrical energy. The cylinder cover 1 is equipped with an exhaust valve 5 and a pneumatic nozzle 6 with an electromagnetic valve 9, which is connected by the intake manifold 7 to the receiver 8. In the cylinder 1 there is a piston-armature 6, under which there is a buffer cavity 10. The electric winding 4 through the connecting panel 11 is connected to compressor 12. 1 C. p. f-ly, 1 ill.

Description

The proposal relates to mechanical engineering, namely to engine building and can be used to obtain additional effective power in a power plant, including an internal combustion engine and a free-piston pneumatic thermoelectric generator for utilizing the heat of exhaust gas from an internal combustion engine.

Known free-piston thermoelectric generators for utilizing the heat of exhaust gases of internal combustion engines.

Known free-piston steam thermoelectric generator for utilizing the heat of exhaust gas of internal combustion engines (Kukis BC, Khasanova M.L. et al. Free-piston steam thermoelectric generator for utilizing the heat of exhaust gas of internal combustion engines: Utility Model Certificate. RU 26600 U1 7 F 02 G 5/02. 10.12. 02. Bull. No. 34). A free-piston steam thermoelectric generator is a two-stroke cycle steam engine containing a cylinder with inlet and outlet windows providing for a periodic change of the working fluid. An anchor piston and a nozzle are placed in the cylinder, through which water is injected from the tank into the cylinder. Under the armature piston there is a buffer cavity filled with air. On

at the bottom of the cylinder is an electrical winding for generating electrical energy.

The disadvantages of this design are:

high water consumption necessary for the production of work as a result of its evaporation, exceeding the mechanical losses in the engine, which requires the organization of a closed loop of water circulation;

significant energy costs for organizing the circulation of water and creating high pressure for its effective atomization in a spherical chamber;

serious problems associated with the need to create a water purification system in a closed loop of water circulation.

Also known is a free-piston pneumatic thermoelectric generator for utilizing the heat of exhaust gases of an internal combustion engine (Kukis BC, Smolin AB, Tkachenko A.V. and others. A free-piston pneumatic thermoelectric generator for utilizing the heat of exhaust gases of an internal combustion engine: Utility Model Patent. RU 51116 U1 F 02 G 5/02. 01/27/06. Bull. No. 03). The free-piston pneumatic thermoelectric generator contains: a compressor, a receiver and a cylinder, the upper part of which is surrounded by a cavity for the passage of exhaust gases of the internal combustion engine, and the cover is equipped with an exhaust valve and a pneumatic nozzle with an electromagnetic valve. The piston-anchor is placed in the cylinder,

under which there is a buffer cavity. On the bottom of the cylinder is an electrical winding.

This engine design is the closest to the proposed technical essence and is taken as a prototype.

The disadvantages of the prototype are:

The disadvantages of this engine are:

- significant temperature fluctuations in the piston volume of the cylinder due to a significant difference in the temperature of the exhaust gases of the internal combustion engine in different modes of its operation;

- uneven heating of the walls of the cylinder, since hot gas blows it on only one side. This leads to thermal stresses in the walls of the cylinder and limits the amount of heat that is transferred from the gases to the inner cylinder space.

The objective of the proposal is to increase the efficiency of using the heat of the exhaust gases of the internal combustion engine during its utilization and to reduce thermal stresses in the cylinder walls.

The solution to this problem is achieved by the fact that in a free-piston pneumatic thermoelectric generator for utilizing the heat of exhaust gases of an internal combustion engine containing a cylinder into the supra-piston cavity of which under high pressure through a pneumatic

the nozzle is supplied with air, the outer walls of the cylinder are surrounded by a cavity filled with heat-accumulating substance, and a cavity for the passage of exhaust gases of ICE, from which heat is transferred to the heat-accumulating substance

An analysis of the proposed solution and the known ones allows us to conclude that it meets the patentability conditions of the utility model.

The proposal is illustrated in the figure (figure 1), which shows the basic structure of the proposed free-piston pneumatic thermoelectric generator for utilization of the heat of exhaust gases of the internal combustion engine.

The proposed free-piston pneumatic thermoelectric generator for utilizing the heat of exhaust gases contains: cylinder 1, the upper part of which is surrounded by a cavity 2 with heat-accumulating material and a cavity 3 for the passage of ICE exhaust gases, and on the lower part of the cylinder 1 there is an electric winding 4 for generating electric energy. The cylinder cover 1 is equipped with an exhaust valve 5 and a pneumatic nozzle 6 with an electromagnetic valve 6, which is connected by the intake manifold 7 to the receiver 8. In the cylinder 1 there is a piston-armature 9, under which there is a buffer cavity 10. The electric winding 4 through the connecting panel 11 is connected to compressor 12.

The proposed free-piston pneumatic thermoelectric generator for utilizing the heat of exhaust gases of the internal combustion engine works as follows.

When the piston-armature 9 is located in TDC, air is supplied under pressure to the cylinder 1 through the nozzle 6 from the receiver 8 through the intake manifold 7. Here it expands under conditions of heating from the walls of the cylinder 1, which is heated externally from the exhaust gases of the internal combustion engine passing through the cavity 6, through an intermediate heat carrier (heat-accumulating material), and does the work of moving the piston-armature 9. When the piston-armature 9 moves down, air compression in the buffer cavity 10. After the piston-anchor 9 reaches the BDC, the highly compressed air in the buffer cavity 10 will cause the piston-anchor 9 to move upward, at this moment the exhaust valve 5 opens and air is released from above piston space. When the piston-armature 5 reaches its highest position, the valve 7 closes and the duty cycle is repeated. In the process of performing the described duty cycle in cylinder 1, the piston-armature 9 moves inside the winding 4 and excites an emf in it, acting on the principle of a linear generator. The generated electrical energy through the connecting panel 11 is supplied to power consumers and a compressor 12 having an electric drive.

Compared with the prototype in the proposed free-piston pneumatic thermoelectric generator for utilization of the heat of the exhaust gases of the internal combustion engine due to the presence of a cavity with heat-accumulating material, the following are excluded:

significant temperature fluctuations in the piston volume of the cylinder due to a significant difference in the temperature of the exhaust gases of the internal combustion engine in different modes of its operation;

- uneven heating of the walls of the cylinder, caused by uneven heating around the perimeter, which does not cause thermal stresses in the walls of the cylinder and does not limit the amount of heat that is transferred from the exhaust gases of the internal combustion engine gases into the inner cylinder space,

in this connection, this engine completely lacks the disadvantages characteristic of the prototype.

Claims (1)

A free-piston pneumatic thermoelectric generator for recovering the heat of exhaust gas from an internal combustion engine operating in a two-stroke cycle and comprising a cylinder provided with a buffer cavity underneath the armature piston and an electric coil on the outside of the lower part of the cylinder, characterized in that a cavity is located on the outer side of the upper part of the cylinder filled with heat-accumulating substance, which, in turn, is surrounded by a cavity for the passage of exhaust gases of the internal combustion engine.