JP2013083235A - Solar power generator with hot water effect - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system which obtains electricity by a generator by heating a thermal medium by solar heat and by driving a turbine by obtaining steam, and a solar power generator with a hot water effect.SOLUTION: In a hot water system, heat which deteriorates the efficiency of power generation of a sunlight power generation panel is cooled, a steam force is converted into a drive force by using a turbine unit located at the downstream side of the system which keeps the efficiency of power generation of the sunlight power generation panel constant and obtains steam by the solar heat by using a steam heating unit located at the downstream side of a heat exchange system, and obtains hot water by a water temperature rasing unit by using waste heat which is emitted at the cooling of the steam by using a condensation unit which is located at the downstream side of a turbine system for increasing a total power generation amount by generating power once again by driving the generator by using the drive force and adding it to power generated at the sunlight power generation panel. At present, there are individual commodities for sunlight power generation and a sunlight hot water device, respectively, however, in this invention, there is constituted a solar heat power generator system with the hot water effect having a function which can reduce a total energy amount in a household by integrating the commodities.

Description

According to the present invention, most of the photovoltaic power panels currently on the market are reduced in power generation efficiency due to a rise in temperature. Therefore, it is possible to cool the solar power panel and use the waste heat to obtain power generation and hot water. Provide solar power generator with hot water supply effect.

Currently, power generation and hot water supply technologies using sunlight have been widely proposed in individual fields, and are widely used as individual facilities.

However, most of the photovoltaic power panels currently on the market have a drawback that the power generation efficiency decreases due to an increase in temperature.

JP2009-283640

The present invention reduces the power generation efficiency due to the heat of the photovoltaic power generation panel, removes the high temperature in summer and radiant heat due to direct sunlight, etc. by cooling the photovoltaic power generation panel, thereby improving the efficiency of the photovoltaic power generation panel and improving the original performance. A solar power generator with a hot water supply effect is provided in order to demonstrate it.

The system that cools the heat generation efficiency of the solar power generation panel keeps the power generation efficiency of the solar power generation panel constant, and it generates power from the waste heat generated during cooling and adds to the power generated by the solar power generation panel. In the present situation, the solar power generation and the solar water heater are separate products, but in the present invention, hot water can be supplied by integrating them, and the total energy in the home can be reduced.

As is clear from the above description, the following effects can be obtained in the present invention.
(1) The heat medium is vaporized using solar heat, the turbine is driven, and electric power is obtained by a generator.
(2) The solar power generation panel is cooled to remove high temperatures such as in summer and radiant heat due to direct sunlight, thereby improving the efficiency of the solar power generation panel and exhibiting the original performance.
(3) Hot water used for hot water supply is obtained by reheating waste heat generated when the heat medium is vaporized using solar heat to drive the turbine and condense the steam used for power generation.

Overall circuit diagram Heat exchange unit configuration diagram Steam heating unit configuration diagram Condensing unit configuration diagram Water temperature rise unit configuration diagram Heat transfer fluid tank unit configuration diagram

Embodiments of the present invention will be described below with reference to the drawings.

About the structure of the heat exchange unit 1, it is a unit which cools the heat | fever of the solar panel A, aims at the improvement of power generation efficiency, and obtains the steam which bears power generation hot water with the waste heat.
The main material of the unit is preferably metal because of temperature changes and pressure changes due to steam, but heat exchange is also possible with flat tubes.
Adhesion between the solar panel A and the heat exchange unit 1 is fixed with a double-sided tape or the like, and an adhesive force and durability that can support the weight of a material, a cooling area, a liquid, and the like are required.
The cooling unit 1 is preferably made of metal, but in order to explain the cooling effect of the solar panel A, here, a tube will be described as an example. The travel path of the tube starts in parallel from the inclined lower part of the solar panel A. The back surface of the solar panel A meanders in a zigzag way and takes a route leading to the upper part. The distance between the tubes is repeatedly measured in a high-temperature environment, and the optimum distance is determined to provide a material for determining the cooling temperature. .
One-way valves are provided at the inlet and outlet of the heat exchange unit to prevent the backflow of the heat transfer liquid so that it does not become a rotational resistance of the turbine.
The heat medium is required to be able to withstand each climate due to high temperatures in the summer and low temperatures in the winter. In addition, as a material that turns into steam at a certain temperature, it is required to be mainly composed of alcohol, oil or ammonia. As a condition, it is required that the boiling point is about 40 degrees at high temperature and 20 degrees below zero at low temperature. In this heat exchange unit 1, the circulation rate of the heat medium increases as the vapor pressure increases at high temperature. The cooling effect changes at a low temperature. To prevent damage due to freezing in the piping at low temperatures, the heat medium is forcibly circulated at low temperatures to prevent freezing. To forcibly circulate the heat medium, it is circulated. A control circuit 8 for driving the pump 7 with a storage battery is required.
The entrance of the heat exchange unit 1 is prevented from being clogged by a filter for removing foreign substances.
The heat medium in the heat exchange unit 1 is circulated from the same time as the start of power generation of the solar panel A, and a separate small solar panel is required for the control circuit 8 as a power source.

Concerning the structure of the steam superheating unit 2, the steam heating unit 2 aims to increase the steam temperature and the steam pressure by reheating the heat medium heated by the heat exchange unit.
Since the heating medium heated by the heat exchange unit 1 cannot be effectively lowered when heated to a temperature at which the heat exchange unit 1 becomes steam, the heat medium separately from the heat exchange unit 1 A place where the liquid is heated and boiled is required, and that place is the steam heating unit 2, which is the power source of the present invention.
The main material of the unit is metal because of the temperature change and pressure change due to steam, the surface is black and the solar heat absorption is improved, and the outer case is attached and the glass is used on the top surface in the greenhouse state. Keep the temperature high for a long time.
The structure of the unit is a metal rectangle, and the cooling effect of the solar panel A can be improved by separating the heat exchange unit 1 that collects solar heat and the steam heating unit 2 by increasing the surface area. A temperature is maintained at a low state (assuming that the solar panel temperature in summer is about 45 ° C., assuming that the coolant temperature is 20 ° C., the temperature can be cooled by about 20 ° C. It can improve about 10 percent.

Regarding the structure of the turbine unit 3, the power of the heat medium heated by the steam superheating unit 2 and converted into steam is converted into rotational force by the turbine, and the turbine used as the power of the generator 9 and the circulation pump 7 is circulated with the generator 9 by a turbo shaft. A material that is resistant to temperature changes is required to rotate the pump 7.

The structure of the condensing unit 4 plays a role of returning the steam discharged from the steam turbine 3 of the condensing unit 4 to a liquid again and creating a low-temperature heat medium.
Condensing unit 4 is a double pipe with water on the outer periphery and steam on the inner periphery. The temperature of the outer periphery is adjusted to maintain the temperature by supplying water. Attach a temperature sensor that will control the circulating flow rate of water in the outer pipe by controlling the temperature rise in the condensing unit 4 by attaching a temperature sensor to the side (steam inlet side) at about 40 ° C setting. Therefore, the control circuit 8 can also manage the prevention of freezing in winter. The power source of the control circuit 8 maintains a power source generated by a small solar panel for the control circuit 8 that initially drives the circulation pump 7 with a battery. .
It is desirable that the pipe length should be determined repeatedly so that the refrigerant temperature at the final end of the condensing unit 4 is equal to the water temperature. The material of the condensing unit 4 is a metal that can withstand temperature changes, and the surface is subject to changes in the outside air temperature. A heat shield such as a urethane roll is required so that it is not easily affected.

About the structure of the water temperature raising unit 5 The water temperature raising unit 5 is made of metal for the pipe of the water temperature raising unit 5 for heating hot water obtained from the condensing unit 4 for hot water supply, and improves the absorption of solar heat. By making it rectangular, the surface area is increased and solar heat is collected, and an outer case is attached and glass is used on the upper surface to maintain a high temperature in a greenhouse state for a long time.
The pipes are provided with intermediate cuts on the rectangular pipes, and the intermediate cuts further constitute heat collecting fins, so that the pipes have a disk-like cross section, thereby increasing the water temperature heating area.

Regarding the structure of the heat medium liquid tank 6 The heat medium liquid tank 6 is a tank that stores the heat medium that has become liquid in the condensing unit 4.
The structure has a pipe through which water flows on the lower surface of the heat medium liquid tank 6 so that the liquid heat medium can always be cooled with water.
The heat medium circulates through each unit, but since it becomes a closed circuit, a confirmation window is provided to check the change in liquid volume, and the heat medium inlet is a screw-type plug.

Regarding the structure of the circulation pump 7 The circulation pump 7 plays a role of keeping the temperature of the heat exchange unit 1 constant, and is driven from the time when the photovoltaic power generation panel A operates. A panel is required.
The circulation pump 7 rotates the generator 9 and the turbine 3 with a turbo shaft. When the solar panel A operates and at low temperatures, the coolant is forced to be discharged when the temperature is low to prevent breakage due to freezing in the piping. A control circuit 8 for preventing the freezing by circulation and driving the circulation pump 7 with a storage battery is necessary.

It is assumed that the structure of the control circuit 8 is operated by a storage battery for the purpose of adjusting the water temperature and preventing freezing by a temperature sensor.
The operating part of the control circuit controls the circulation pump and the condensing unit.

The structure of the generator 9 serves to change the rotational force obtained by the turbine unit 3 into electric power.

Claims (3)

A steam generating unit for evaporating the heat medium using solar heat, a generator drivingly connected to a turbine unit rotated by the steam of the heat medium, a condensing unit for returning the heat medium steam to a liquid, and the steam A circulation line that circulates the heat medium through the generation unit and the condensing unit, and a circulation pump disposed in the circulation line, and a liquid heat medium is sent to the steam generation unit by the circulation pump, and the steam generation The solar power generation system, wherein the turbine is rotated by the heat medium steam generated in the unit and is generated by the generator, and the steam flowing through the turbine is liquefied by the condensing unit. A solar power generation panel is provided in connection with the steam generation unit, a heat exchanger is further provided in connection with the solar power generation panel, and the circulation line leads to the steam generation unit through the heat exchanger. 2. The solar heat according to claim 1, wherein the liquid heat medium is heated by heat exchange with the photovoltaic power generation panel in the heat exchanger, and the heated liquid heat medium is sent to the steam generation unit. Utilization power generation system. The water is supplied to the condensing unit, heat exchange is performed with the heat medium vapor in the condensing unit, and water heated by the heat exchange is sent to the water temperature raising unit. Or a solar thermal power generation system according to 2;

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