Power supply voltage control system for circulating solar thermal power generation system, motor, and heater

Abstract

Conventional circulating solar thermal power generation systems use two cooling units, resulting in high manufacturing costs and high electricity consumption. Furthermore, because the temperature inside the chimney cannot be raised high enough, increasing the chimney height is necessary to maximize power generation, which increases the overall size of the system and thus the manufacturing cost. [Solution] Replace one cooling unit with a heater, and install an evaporator fan above the evaporator of the cooling unit to increase the cooling efficiency of the evaporator and raise the temperature inside the chimney.

Description

Technical Field

[0001] The present invention always turns on the power supply of the blower 70 for the greenhouse box that blows air into the greenhouse box 80. When the temperature of the greenhouse box 80 is higher than the temperature around the greenhouse box 80, it dissipates heat. In the opposite case, it absorbs heat. The heat generated by the heater 30, the generator 60, and the control device 100, and the heat from the greenhouse box 80 generate an upward air current in the chimney 20. The blower 70 for the evaporator blows air to the evaporator 13 for the equipment box, cools the cooled air and the upward air current by the evaporator 13 for the equipment box to generate a downward air current, and the downward air current flows into the turbine 50 to rotate the turbine 50 and rotate the generator 60 to generate electricity.

[0002] As this type of power generation device, as shown in Patent Documents 1, 2, and 3 in which a circulating solar thermal power generation device related to the present applicant is known, the amount of heat generated by the air flow compressor 111 and the air flow condenser 112 is equal to the amount of heat absorbed by the air flow evaporator 113, and the heat generated by the generator 60 and the control device 100 and the heat from the greenhouse box 80 are absorbed by the evaporator 13 for the equipment box.

[0003] Also, an upward air current is generated by the heat generated by the air flow motor 110, the air flow compressor 111, the air flow condenser 112, the generator 60, the control device 100, and the heat flowing from the greenhouse box 80 into the equipment box 1. It is cooled by the air flow evaporator 113 and the evaporator 13 for the equipment box to generate a downward air current. The downward air current flows into the turbine 50, and the turbine 50 is rotated by the injection of the air flowing in from the L-shaped nozzle 130 fixed to the turbine 50, and the generator 60 is rotated by the rotation of the turbine 50 to generate electricity.

[0004] Also, the heat generated by the heater 30, the generator 60, and the control device 100 and the heat flowing from the greenhouse box 80 into the chimney 20 are cooled by the evaporator 13 for the equipment box. The cooled heat is absorbed by the evaporator for the equipment box, and the heat is dissipated outside the equipment box 1 by the compressor 12 for the equipment box and the condenser 13 for the equipment box of the cooling device for the equipment box.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2019-128059 [Patent Document 2] Japanese Patent Publication No. 2020-148113 [Patent Document 3] Patent No. 2022-179862 [Overview of the project] [Problems that the invention aims to solve]

[0006] Conventional circulating solar thermal power generation systems have the disadvantage of high manufacturing costs because they incorporate airflow cooling equipment (airflow motor 110, airflow compressor 111, airflow condenser 112, airflow evaporator 113, etc.) within the device box 1.

[0007] Furthermore, when the temperature inside the greenhouse box 80 exceeds the set temperature, the blower 70 for the greenhouse box turns ON, and the air inside the greenhouse box 80 absorbs the heat from the outside temperature and flows from the greenhouse box 80 into the device box 1. As a result, the heat from the greenhouse box 80 must be absorbed by the evaporator 13 for the device box, which increases the power consumption of the cooling device for the device box (electric motor 10 for the device box, compressor 11 for the device box, condenser 12 for the device box, evaporator 13 for the device box, etc.), resulting in higher electricity costs.

[0008] Furthermore, setting the temperature inside the chimney 20 to a high temperature presented a drawback: the high-temperature rising airflow could not be cooled by the airflow evaporator 113 and the equipment box evaporator 13.

[0009] Furthermore, lowering the temperature inside the chimney 20 would require increasing the height of the chimney 20 in order to increase the power output of the generator 60, which would result in a larger equipment box 1 and thus higher manufacturing costs. [Means for solving the problem]

[0010] This invention was made to solve the aforementioned problems, and aims to generate electricity by removing the airflow cooling device (airflow motor 110, airflow compressor 111, airflow condenser 112, airflow evaporator 113, etc.), installing a bottom temperature sensor 41 at the bottom of the device box 1, installing a control device 100, heater 30, turbine 50, and generator 60 inside the chimney 20, installing a chimney temperature sensor 40 at the top of the chimney 20, providing an inlet for inflow from the device box 1 to the greenhouse box 80, providing an outlet for outflow from the greenhouse box 80 to the device box 1, installing a greenhouse box blower 70 at the inlet of the greenhouse box 80, installing an evaporator 13 for the device box on top of the chimney 20, installing an evaporator blower 90 on top of the evaporator 13 for the device box, and installing the device box motor 10, device box compressor 11, and device box condenser 12 outside the device box 1.

[0011] To achieve the above objective, at the start of power generation, the power supply to the control device 100 and the power supply to the greenhouse box blower 70 are turned ON, the bottom temperature of the device box 1 is measured by the bottom temperature sensor 41, if the measured temperature is above the bottom temperature set value, the power supply to the device box motor 10 is turned ON to cool the device box 1 to the bottom temperature set value, and once the bottom temperature reaches the set value, the voltage of the device box motor 10 is maintained, and if the measured temperature is below the bottom temperature set value, the power supply to the heater 30 is turned ON to warm the device box 1, and once the bottom temperature reaches the bottom temperature set value, the power supply to the heater 30 is maintained.

[0012] When the temperature at the bottom of the device box 1 reaches the bottom set temperature, the power to the heater 30 is turned ON or the voltage is increased, and the heat from the heater 30, generator 60, and control device 100 raises the temperature inside the chimney 20. The chimney temperature sensor 40 measures the temperature inside the chimney 20, and the control device 100 controls the voltage of the heater 30 so that the temperature inside the chimney 20 reaches the chimney set temperature. At the same time, the control device 100 controls the voltage of the device box motor 10 so that the temperature at the bottom reaches the bottom set temperature, cooling the rising airflow and bringing the temperature at the bottom of the device box 1 to the set value.

[0013] Furthermore, the temperature inside the chimney 20 is measured by a chimney temperature sensor, and when the measured temperature reaches the evaporator fan set temperature, the power to the evaporator fan 90 is turned ON, and air is blown from the evaporator fan 90 to the evaporator 13 for the equipment box. The blown air is cooled, and the evaporator 13 for the equipment box and the cooled air cool the high-temperature rising airflow that has flowed out of the chimney 20.

[0014] Furthermore, the heat from the rising airflow flowing out of the chimney 20 is absorbed by the evaporator 13 for the equipment box, and the absorbed heat is then released outside the equipment box 1 by the compressor 11 and condenser 12 for the equipment box. [Effects of the Invention]

[0015] In conventional circulating solar thermal power generation systems, replacing the airflow cooling equipment (airflow motor 110, airflow compressor 111, airflow condenser 112, airflow condenser 113, airflow evaporator 113, etc.) with a heater 30 has the effect of reducing manufacturing costs.

[0016] The amount of heat generated inside the chimney 20 is the amount of heat that flows into the chimney 20 from the heater 30, generator 60, control device 100, and greenhouse box 80. If the temperature around the greenhouse box 80 is higher than the temperature inside the greenhouse box 80, the temperature inside the chimney 20 will rise, which allows the voltage of the heater 30 to be lowered, thus reducing power consumption.

[0017] Since the power to the greenhouse box blower 70 is kept on at all times, if the temperature around the greenhouse box 80 is higher than the temperature at the bottom of the device box, the greenhouse box 80 absorbs heat from the surroundings and cools the surroundings. If the temperature is lower than the set temperature, the heat from the greenhouse box 80 is released to the surroundings, warming the surroundings.

[0018] The chimney temperature sensor 40 measures the temperature inside the chimney 20. When the temperature reaches or exceeds the set temperature for evaporator blower operation, the power supply of the evaporator blower 90 is turned on, and air is blown to the evaporator 13 for the equipment box. By forcibly cooling the periphery of the evaporator 13 for the equipment box, the high-temperature upward airflow can be easily cooled. Also, since the upward airflow does not directly hit the evaporator 13 for the equipment box, the evaporator 13 for the equipment box can be protected.

[0019] Moreover, by increasing the temperature inside the chimney 20 and reducing the height of the chimney, the equipment box 1 can be made smaller, thus reducing the manufacturing cost.

Brief Description of the Drawings

[0020] [Figure 1] Cross-sectional view of the circulating solar thermal power generation device according to the present invention [Figure 2] Turbine (a) Cross-sectional view (b) Plan view [Figure 3] Cross-sectional view of the evaporator for the equipment box [Figure 4] Plan view of the evaporator for the equipment box [Figure 5] Conventional circulating solar thermal power generation device

Embodiments for Carrying Out the Invention

[0021] Figure 1 is a cross-sectional view showing the invention of this application. The equipment box 1 incorporates a chimney 20, a heater 30, a generator 60, a control device 100, an evaporator 13 for the equipment box, an expansion valve 15 for the equipment box, an evaporator blower 90, a chimney temperature sensor 40, a bottom temperature sensor 41, and a greenhouse box blower 70. Inside the chimney 20, there are a heater 30, a generator 60, a control device 100, and a chimney temperature sensor 40. A bottom temperature sensor is installed at the bottom of the equipment box 1. An electric motor 10 for the equipment box, a compressor 11 for the equipment box, a condenser 12 for the equipment box, and a greenhouse box 80 are installed outside the equipment box 1. The condenser 12 for the equipment box and the expansion valve 15 for the equipment box are connected by a capillary tube. The expansion valve 15 for the equipment box and the evaporator 13 for the equipment box are connected, and the evaporator 13 for the equipment box and the compressor 11 for the equipment box are connected by a suction pipe.

[0022] When power generation starts, the power to the greenhouse box blower 70 is turned ON. If the temperature at the bottom of the device box 1 is higher than the bottom set temperature, the power to the device box motor 11 is turned ON. When the bottom temperature reaches the bottom set temperature, the voltage of the device box motor 11 is maintained. If the bottom temperature is lower than the bottom set temperature, the power to the heater 30 is turned ON. When the bottom temperature reaches the bottom set temperature, the power to the heater 30 is maintained.

[0023] The heat generated by the heater 30, generator 60, and control device 100, along with the heat from the greenhouse box 80, creates an updraft. When the temperature inside the chimney rises above the evaporator set temperature, the power to the evaporator blower is turned ON.

[0024] The temperature inside the chimney 20 is measured at 40°C by a chimney temperature sensor, and the heater voltage is maintained when the temperature inside the chimney 20 reaches the chimney set temperature. The evaporator fan set temperature is set, the evaporator fan 90 is installed on top of the evaporator 13 for the equipment box, and the greenhouse box fan 70 is kept ON at all times.

[0025] A chimney temperature sensor measures the temperature of the chimney at 40°C (20°F). When the measured temperature reaches the evaporator temperature setpoint, the evaporator blower is turned on.

[0026] The chimney temperature is measured, and when the measured temperature reaches the chimney set temperature, the heater voltage is maintained.

[0027] The evaporator blower 90 blows air into the evaporator 13 for the device box, cooling the blown air. The evaporator 13 for the device box and the cooled air then cool the rising airflow, generating a downward airflow. This downward airflow flows into the turbine 50, which rotates the turbine 50, and the generator 60 attached to the turbine 50 rotates, generating electricity.

[0028] Figure 2 shows the turbine 50. Air flowing into the turbine 50 is ejected from the L-shaped nozzle 130, which rotates the turbine 50, which in turn rotates the generator 60 to generate electricity.

[0029] Figure 3 shows the evaporator 13 for the equipment box. Air blown from the evaporator blower 90, which is installed above the evaporator 13, is cooled, and the evaporator 13 and the cooled air cool the rising airflow.

[0030] Figure 4 is a plan view of the evaporator 13 for the apparatus box.

[0031] Figure 5 is a cross-sectional view of a conventional circulating solar thermal power generation system. [Explanation of Symbols]

[0032] 1 equipment box 10 Electric motor for equipment box 11. Compressor for the equipment box 12. Condenser for the device box 13. Evaporator for the apparatus box 14 Capillary tubes for the device box 15 Expansion valve for the device box 16. Suction pipe for equipment box 20 Chimneys 30 Heater 40 Chimney temperature sensor 41 Bottom temperature sensor 50 Turbine 60 Generators 70 Greenhouse Box Blower 80 greenhouse box 90 Evaporator Blower 100 Control device 110 Airflow Motor 111 Airflow compressor 112 Airflow condenser 113 Airflow Evaporator 114 Airflow Capillary Tube 115 Airflow Expansion Valve 116 Airflow suction pipe 120 Rotating Tube 130 L-shaped nozzle 131 Tachometer 140 Turbine ventilation holes 150 Refrigerant liquid inlet 160 Refrigerant liquid spray nozzles 170 Ventilation opening for evaporator 180 shielding panel 190 Refrigerant liquid outlet 200 heat dissipation plate

Claims

1. The sealed device box houses a chimney, a chimney temperature sensor, a heater, multiple generators, multiple turbines, an evaporator for the device box cooling system, an expansion valve for the device box cooling system, a control device, and a bottom temperature sensor. The chimney houses the chimney temperature sensor, the control device, the multiple turbines, the heater, multiple generators, and a tachometer. Outside the device box are the device box motor, device box compressor, and device box condenser for the device box cooling system. The device box compressor and the device box expansion valve are connected by a capillary pipe, the device box expansion valve is connected to the device box evaporator, and the device box evaporator is connected to a suction pipe. A circulating solar thermal power generation system, comprising a suction pipe and a compressor for the device box, wherein a chimney temperature sensor is installed at the top of the chimney, an evaporator for the device box is installed outside the chimney and at the top of the chimney, a bottom temperature sensor is installed at the bottom of the device box, a plurality of greenhouse boxes are installed outside the device box, a greenhouse box blower is installed to blow air from the device box into the device box via the greenhouse boxes, an evaporator blower is installed above the evaporator for the device box cooling device, and power is supplied to the power grid.

2. Claim 1 provides a power supply voltage control method for a circulating solar thermal power generation system, an electric motor for the device box, and a heater, characterized in that when the power supply of the control device is turned ON, the power supply of the blower for the greenhouse box is turned ON at the same time, air from the device box is blown into the device box via the greenhouse box, the temperature of the bottom of the device box is measured by the bottom temperature sensor, the power supply of the heater is turned ON when the temperature inside the device box is below the set temperature, the power supply voltage of the heater is maintained when the temperature inside the device box reaches the set temperature, and when the measured temperature inside the device box is above the set temperature, the power supply of the electric motor for the device box of the cooling system is turned ON, and the power supply voltage of the electric motor for the device box of the cooling system is maintained.

3. Claim 2, a circulating solar thermal power generation system and a power supply voltage control method for the motor and heater of the device box, characterized in that the evaporator blower is installed above the evaporator, the temperature inside the chimney is measured by a chimney temperature sensor, and when the measured temperature reaches the evaporator blower set temperature, the power to the evaporator blower is turned ON, the air blown by the evaporator blower passes through the evaporator for the device box and is cooled by the evaporator for the device box, the cooled air and the rising airflow are cooled to become a descending airflow, and the air inside the device box circulates inside the device box.

4. Claim 3, a power supply voltage control method for a circulating solar thermal power generation system, an electric motor for the system box, and a heater, characterized in that the temperature at the top of the chimney is measured by the chimney temperature sensor, and if it is below the chimney set temperature, the power supply voltage of the heater is increased, and when the chimney reaches the set temperature, the power supply voltage of the heater is maintained; and if the temperature measured by the chimney temperature sensor is above the chimney set temperature, the power supply voltage of the heater is decreased, and when the chimney reaches the set temperature, the power supply voltage of the heater is maintained.

5. Claim 4 describes a circulating solar thermal power generation system and a power supply voltage control system for the motor and heater of the device box, characterized in that the rising airflow is cooled by the cooled air and the evaporator for the device box, generating a descending airflow, which flows into the turbine, and the turbine is rotated by the energy of the air injected from the L-shaped nozzle fixed to the turbine, and the turbine rotates as a generator fixed to the turbine rotates and generates electricity.

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