JP2016196860A - Power generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar heat stirling engine power generation device capable of securing a stable power generation amount even in reduction of solar heat.SOLUTION: A power generation device utilizing solar heat and dry ice, has a cylindrical heat exchange portion having a rotary plate including a plurality of fins disposed on a peripheral surface at a specific angle to an axial direction, a heat input portion positioned at an upper half portion of the heat exchange potion to collect the solar heat, a cooling chamber accommodating a lower half portion of the heat exchange portion to receive water and dry ice, and a power generating portion having a rotor driven by the rotary plate of the heat exchange portion. The rotary plate including the fins, is rotated by movement of air caused by expansion/contraction of air at the upper portion in the heat exchange portion heated by solar heat and waste heat by power generation and the air of the lower portion in the heat exchange portion cooled by water and dry ice, and movement of the air generated in a process of expanding and discharging carbon dioxide generated by vaporization of dry ice into the heat exchange portion, and electric power is produced by rotation of the rotor of the power generating portion.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a power generator for renewable energy using the principle of a Stirling engine.

  In recent years, renewable energy-related power generation such as solar power generation, wind power generation, and geothermal power generation has attracted attention due to a sense of caution against global warming and nuclear power generation.

  On the other hand, the Stirling engine, which was invented in the first half of the 19th century, was pushed by the popularization of easy-developed internal combustion engines such as gasoline engines, and its use as power has not progressed. It is being reviewed as a clean power generator, and research is being conducted.

JP 2004-332672 A JP2014-206120A

  Currently, Japan's energy self-sufficiency rate is 4%, which is extremely low compared to other countries (Resources and Energy Agency, Energy White Paper 2011). In addition, the proportion of power generation using fossil fuels such as thermal power generation was 61% in December 2010 before the earthquake and 90% in December 2012 after the earthquake (Resources and Energy Agency “Energy situation in Japan”). 1 "). In this situation, if import of fossil fuels stops, it will not only adversely affect Japanese economic activities and daily life, but it will also go against solving global warming problems.

  Based on the above-mentioned present situation, various researches are currently being conducted to disperse power sources that rely on thermal power generation and the like into renewable energies such as hydropower, wind power, solar power, and geothermal power generation. As one of them, as a clean power generation device that does not select a heat source, development and research of a power generation device using a Stirling engine using solar heat, exhaust heat, etc. is being carried out.

  However, a Stirling engine that converts a change in gas volume in a closed space resulting from a temperature difference into kinetic energy has the following problems. First, in order to operate the generator effectively, it is necessary to quickly and quickly cool the air. However, it is difficult to obtain sufficient output only by gas expansion due to solar heat, etc. The speed of the heat exchange cycle cannot be so fast. Secondly, the supply of solar heat or waste heat as a heat source is often not constant due to weather or factory operation, and it is difficult to operate the generator stably.

  In view of these problems, Patent Document 1 proposes a Stirling engine power generation device that includes a Fresnel lens that condenses and heats solar heat, and an optical fiber made of quartz glass that guides the condensed heat source to a predetermined place. . However, this device addresses the first problem described above by increasing the concentrated heat power from sunlight, but the second problem that operation is restricted by the weather has not been solved at all.

  In Patent Document 2, in a solar thermal Stirling engine that uses high-pressure helium gas as the working gas in the engine, the inertial mass of the rotor that is installed on the engine rotation shaft and serves both for starting and for power generation is reduced. An invention of a Stirling engine generator that adjusts the power generation amount by rapidly changing the engine speed when the incident heat of the sun changes is disclosed. However, in this type of Stirling engine generator, since a high-pressure special gas is enclosed in the working gas in the engine, a mechanism for controlling the gas pressure and piston stroke is required. When the amount of solar heat changes, the power generated by itself is reused for engine rotation, so it is not possible to cover the decrease in the total amount of power generation.

  The present invention solves the above-mentioned problem, and does not require a special gas as a working gas or a complicated mechanism therefor, and a solar heat Stirling engine power generator that can secure a stable power generation amount even when solar heat is reduced. The issue is to provide.

  In order to solve the above problems, the power generator according to claim 1 is a renewable energy power generator that uses solar heat and dry ice, and is installed on the circumferential surface at a certain angle with respect to the axial direction. A cylindrical heat exchange part having a rotating plate with a plurality of fins, a heat input part that is located in the upper half part of the heat exchange part and collects solar heat, and a lower half part of the heat exchange part A cooling chamber for receiving water and dry ice, and a power generation unit having a rotor driven by the rotating plate of the heat exchange unit, and air in the upper part of the heat exchange unit heated by solar heat collected through the heat input unit The movement of the air generated by the expansion and contraction of the air in the lower part of the heat exchange section cooled by water and dry ice in the cooling chamber rotates the rotating plate provided with fins, and further heat exchange by the rotation of the rotating plate provided with fins Internal Transfer and heat exchange of the gas is carried out. As the air movement and heat exchange are repeated in this way, the air in the heat exchange unit continues to rotate in a certain direction, the rotating plate continues to rotate, and the rotor of the power generation unit rotates following the rotating plate. Thus, the power generation unit generates electric power.

  According to a second aspect of the present invention, the cooling chamber is hermetically sealed, and a carbon dioxide inlet and a carbon dioxide outlet are spaced apart from each other in the lower half of the heat exchange unit accommodated in the cooling chamber. The rotating plate having a plurality of fins in a process in which carbon dioxide generated by vaporization of dry ice put into the cooling chamber is inflated into the heat exchange section from the carbon dioxide inlet and discharged from the carbon dioxide outlet. It is characterized by rotating.

  The power generation device according to claim 3, wherein the heat exchanging unit has a plurality of fixed fins corresponding to each fin installed on a peripheral surface of the rotating plate on an inner wall thereof, and the heat exchanging unit and the plurality of fins of the rotating plate A plurality of fixed fins on the inner wall cooperate to determine a flow direction of air generated in the heat exchange unit.

  In the power generation device according to claim 4, the power generation unit is connected to each other via the heat input unit and the heat transfer unit in the upper half of the heat exchange unit, and the heat transfer unit transmits waste heat generated by the power generation to the heat input unit. However, it can be used as a heat source.

  The power generator according to claim 5 has a dry ice repurification machine on the extension of the carbon dioxide discharge port of the heat exchange unit, and produces and reuses dry ice from carbon dioxide discharged from the power generator. It is characterized by being able to.

  Since dry ice is used as a low-temperature heat source, stable power generation can be performed as compared to Stirling engine power generation using only solar heat. Further, in the power generation device according to the fourth aspect, since the waste heat of the power generation unit can be reused, the operational stability is further increased.

  Since both heat sources of solar heat and dry ice, which have a large difference in elevation, are used, the temperature difference between the high temperature part and the low temperature part becomes large, which causes a quick air movement and a smooth rotational motion can be obtained. In addition, the movement of the fins of the rotating plate facilitates further air movement and heat exchange, and it is possible to perform regenerative energy power generation without interruption.

  Not a conversion from piston motion to rotational motion, which is adopted by many Stirling engines, but direct rotational motion can be obtained in the heat exchange section, so there is little energy loss until power generation.

  According to the second aspect of the present invention, a forcible rotational force can be obtained by the flow of carbon dioxide swelled into the heat exchange section. In addition, the forced rotation further increases the efficiency of air movement and heat exchange in the heat exchanging section, which creates a virtuous cycle in which the rotational force of the rotating plate is increased.

  In the power generation device of claim 5 having a dry ice repurification processing machine, carbon dioxide generated in the course of operation can be reused, so that it is possible to perform power generation that is environmentally friendly and cost-effective.

It is a perspective view from the front right direction of the electric power generating apparatus of this embodiment (The heat exchanger and the front cover of an electric power generation part are abbreviate | omitted). It is a perspective view from the front left direction of the electric power generating apparatus of this embodiment (The heat exchanger and the front cover of an electric power generation part are abbreviate | omitted). It is a front longitudinal cross-sectional view of the electric power generating apparatus of this embodiment. It is a side longitudinal cross-sectional view of the electric power generating apparatus of this embodiment (The structure in an electric power generation part is abbreviate | omitted).

Embodiments of the present invention will be described below with reference to the drawings.
First, the configuration of the present embodiment will be described.
The power generation device of this embodiment is a power generation device that uses the principle of a Stirling engine that obtains power by heat exchange, and as shown in FIGS. 1 to 4, a cylindrical heat disposed in the center in the vertical direction of the device. The exchange part 1, the heat input part 2 which is located in the upper half part 15 of the heat exchange part 1 and collects and stores solar heat, and the lower half part 16 of the heat exchange part 1 are accommodated to receive water 33 and dry ice 32. A cooling chamber 3 and a power generation unit 4 disposed above the heat input unit 2 are configured.

  The heat exchanging unit 1 has a cylindrical rotating plate 12 that rotates axially inside, and a plurality of fins 13 are installed on the peripheral surface of the rotating plate 12 with a certain angle with respect to the axial direction. The heat exchanging unit 1 has a plurality of fixed fins 11 corresponding to the fins 13 installed on the surface of the rotating plate 12 on its inner wall, and fins 13 having a certain common angle with respect to the axial direction. The fixed fin 11 cooperates to determine the air flow direction in the heat exchange unit 1.

  As shown in FIG. 3, a carbon dioxide receiving port 17 and a carbon dioxide discharging port 18 are installed in the lower half 16 of the heat exchange unit 1 accommodated in the cooling chamber 3 so as to be separated from each other. The carbon dioxide (carbon dioxide gas) 34 inflating from is received from one side and released from the other side (arrow in FIG. 3).

  The cooling chamber 3 is sealed so that the expanding carbon dioxide 34 is inflated into the heat exchanging unit 1, and the dry ice inlet 31 installed on the side surface is a double port from the viewpoint of maintaining airtightness. (Not shown).

  The heat input part 2 located in the upper half part 15 of the heat exchange part 1 is comprised by the circular arc wall which comprises the upper half part 15 of the heat exchange part 1, and the oil pan 21 installed in the wall inside, and an outer surface is solar heat. A matte black coating that absorbs water easily is applied, and heat retaining oil 22 is injected into the oil pan 21. In addition, the heat input unit 2 and the power generation unit 4 are connected via a heat transfer unit 43, and waste heat generated in the power generation unit 4 is transmitted to the heat input unit 2. Moreover, the outer side coating of the cooling chamber 3 which accommodates the lower half part 16 of the heat exchange part 1 is made into a white-type coating so that sunlight heat may be reflected easily.

  A gear 42 is attached to the outer shaft tip of the power generation unit 4, and the rotational movement of the rotating plate 12 is transmitted to the gear 42 by the rotating belt 5.

Next, functions of the present embodiment will be described.
In the power generation apparatus of the present embodiment, the rotation of the rotating plate 12 in the heat exchanging unit 1 exhibits the power generation function by causing the rotor 41 of the power generating unit 4 to follow, but the rotation of the rotor 41 is heat exchange. It is generated by the air flow in the part 1. That is, the fins installed at a certain angle by the air in the upper half part (high temperature part) 15 being guided to the fixed fins 11 by the solar heat collected in the heat input part 2 and expanding and moving in a certain direction. Rotation occurs by moving the rotator 41 at the moment. Further, the hot air flowing into the lower half (low temperature part) 16 is cooled by the dry ice 32 and water 33 and transported again to the upper half (high temperature part) 15 by the fins 11 of the rotating plate 14. A cycle of exchange and air movement is born. Further, during operation, waste heat generated by the power generation device is also transmitted to the heat input unit 2 through the heat transfer unit 43 and reused as a heat source to assist heat exchange in the upper half (high temperature unit) 15. Yes.

  As described above, the power generation apparatus can operate sufficiently using solar heat, waste heat of the power generation apparatus and dry ice as heat sources. However, in the present invention, dry ice generates not only a heat source but also physical power. The main feature is that it is a source material. That is, the dry ice 32 introduced into the sealed cooling chamber 3 is vaporized in contact with water, and expands to a volume approximately 800 times that of the solid state while expanding from the carbon dioxide receiving port 17 of the heat exchanger 1 to the lower half ( It is inflated into the low temperature portion 16 and discharged from the carbon dioxide outlet 18. In this process, a powerful air flow is generated in the heat exchange unit 1 to assist the rotation of the rotating plate 12. Further, the strengthening of the rotational force of the rotating plate promotes the exchange of air and heat between the low temperature part 16 and the high temperature part 15, which creates a virtuous cycle in which the rotational force of the rotating plate is further increased.

  It is also a feature of the present invention that in an environment where sufficient solar heat cannot be obtained at the start of operation, the introduction of dry ice can immediately become a starting force.

  Moreover, since this power generation device can obtain a rotational motion directly like a rotary engine rather than converting from a piston motion to a rotational motion, it is also characterized in that there is little energy loss until power generation.

  Furthermore, this power generation apparatus has a dry ice repurification processing machine (not shown) on the extension of the carbon dioxide discharge port 18, and can produce and reuse dry ice from the discharged carbon dioxide. Another major feature is the provision of carbon dioxide at low cost to fire extinguisher manufacturers and vegetable factories.

DESCRIPTION OF SYMBOLS 1 Heat exchange part 11 Fixed fin 12 Rotating plate 13 Rotating plate fin 14 Rotating shaft 15 Upper half part (high temperature part)
16 Lower half (low temperature part)
17 Carbon dioxide receiving port 18 Carbon dioxide discharge port 2 Heat input unit 21 Oil pan 22 Thermal insulation oil 3 Cooling chamber 31 Dry ice inlet 32 Dry ice 33 Water 4 Power generation unit 41 Rotor 42 Gear 43 Heat transfer unit 44 Electric wire 5 Rotating belt

Claims (5)

A power generation device that uses solar heat and dry ice,
A cylindrical heat exchange section having a rotating plate with a plurality of fins installed on the circumferential surface at a constant angle with respect to the axial direction;
A heat input part for collecting solar heat located in the upper half of the cylindrical heat exchange part;
A cooling chamber that houses the lower half of the cylindrical heat exchange section and receives water and dry ice;
A power generation unit having a rotor driven by the rotating plate of the heat exchange unit;
Consisting of
The air generated by expansion / contraction of the air in the upper part of the heat exchange part heated by solar heat collected through the heat input part and the air in the lower part of the heat exchange part cooled by water and dry ice in the cooling chamber Moving the rotating plate comprising the plurality of fins;
The movement and heat exchange of the air in the heat exchange unit are performed by the rotation of the rotating plate including the plurality of fins,
By repeating the heat exchange and the movement of the air, the air in the heat exchange unit continues to rotate in a certain direction, so that the rotating plate continues to rotate,
The power generation device generates electric power when the rotor of the power generation unit rotates following the rotating plate.   The cooling chamber is hermetically sealed, and a carbon dioxide receiving port and a carbon dioxide discharging port are spaced apart from each other in the lower half of the heat exchange unit housed in the cooling chamber, and are sealed In the process in which carbon dioxide generated by vaporization of the dry ice introduced into the cooling chamber is inflated into the heat exchange section from the carbon dioxide inlet and discharged from the carbon dioxide outlet, the plurality of fins are The power generator according to claim 1, wherein the rotating plate provided is rotated.   The heat exchange part has a plurality of fixed fins corresponding to the fins installed on the surface of the rotating plate on the inner wall, and the plurality of fins of the rotating plate and the plurality of heat exchange part inner walls. The power generation apparatus according to claim 1, wherein a flow direction of air generated in the heat exchange unit is determined in cooperation with the fixed fins.   The power generation unit is connected to each other via the heat input unit and the heat transfer unit in the upper half of the heat exchange unit, and the heat transfer unit transfers waste heat generated in the power generation unit by power generation to the heat input unit. The power generation device according to any one of claims 1 to 3, wherein the power generation device can be used as a heat source for transmission. The power generator has a dry ice repurification machine on the extension of the carbon dioxide outlet of the heat exchanging section, and can produce and reuse dry ice from carbon dioxide discharged from the power generator. The power generator according to any one of claims 1 to 4.