A wind-powered heating device and control method using an electric heating element coupled with a heat pump.

Abstract

This invention relates to a wind-powered heating device and control method that couples an electric heating element with a heat pump for heating. The wind-powered heating device includes a control unit, a wind turbine, a generator, a generator clutch, a wind speed module, a heat pump clutch, an electric heating element, an electric valve, a heat pump unit, and a speed module. The wind turbine transmits power to the ground and splits the power into two paths: one path transmits power to the generator via the generator clutch; the other path transmits power to the heat pump unit via the heat pump clutch. Active engagement of the generator clutch enables electric heating; active engagement of the heat pump clutch enables heat pump heating. By employing a coupling scheme between the electric heating element and the heat pump, and controlling the connection conditions of the electric heating element and the heat pump, low-wind-speed start-up is achieved, and the water supply temperature is increased through secondary heating by the electric heating element.

Description

Technical Field

[0001] This invention relates to the technical field of wind power heating, and in particular to a wind power heating device and control method that couples an electric heating element with a heat pump for heating. Background Technology

[0002] Direct-drive wind power heating is an emerging form of wind energy utilization. It directly uses the mechanical energy generated by wind turbines for heating. Northern my country has abundant wind resources, with high wind power levels during the cold season. Wind power heating can significantly alleviate environmental pollution caused by coal-fired heating in the region during winter.

[0003] Currently, wind power heating has three main directions: direct-drive electromagnetic eddy current heating, direct-drive stirring heating, and direct-drive heat pump heating. The energy efficiency ratios (EERs) of electromagnetic eddy current heating and direct-drive stirring heating are both below 100%, but the EER of direct-drive heat pump heating can exceed 100%, reaching over 300%, and has broad development prospects. Currently, direct-drive wind power heating equipment is only at the laboratory stage; there are no commercially available direct-drive wind power heating devices on the market. While wind turbine and heat pump technologies are relatively mature, there is still no mature commercial prototype of a direct-drive wind power heat pump.

[0004] Electric heating elements are a relatively mature heating solution that can heat circulating water to above 95℃, but their energy efficiency is relatively low. In existing technology, wind-powered direct-drive heat pump units have a high starting wind speed, typically 6 m / s. After startup, without a variable pitch or variable volume compressor, they reach rated output at approximately 8 m / s wind speed. When the ambient temperature drops below -15℃, it is difficult to reach an outlet water temperature of 50℃. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a wind power heating device and control method that uses an electric heating element coupled with a heat pump for heating. The device adopts a scheme of coupling an electric heating element with a heat pump, and achieves low wind speed start-up by controlling the connection conditions of the electric heating element and the heat pump. The device also improves the water supply temperature by using a scheme of secondary heating through the electric heating element.

[0006] To achieve the above objectives, the present invention provides a wind power heating device that couples an electric heating element with a heat pump for heating. The wind power heating device includes a control unit, a wind turbine, a generator, a generator clutch, a wind speed module, a heat pump clutch, an electric heating element, an electric valve, a heat pump unit, and a speed module. The control unit is connected to the wind turbine, generator, generator clutch, wind speed module, heat pump clutch, electric valve, heat pump unit, and speed module. The generator clutch is connected to both the wind turbine and generator. The heat pump clutch is connected to both the wind turbine and heat pump unit, and the heat pump unit is connected to both an inlet pipe and an outlet pipe. The electric heating element is connected to the generator and is matched with a water supply pipe. The wind speed module is installed on the wind turbine, and the speed module is installed upstream of the generator clutch and heat pump clutch to directly measure the output speed of the wind turbine.

[0007] The electric heating tube is an electric heating device connected in parallel with the water outlet pipe of the heat pump unit.

[0008] The electric valve is an electric valve installed on the outlet water pipe of the heat pump unit.

[0009] A control method for a wind power heating device that uses an electric heating element coupled with a heat pump for heating: The wind turbine transmits power to the ground and divides the power into two paths. One path transmits power to the generator via a generator clutch; the other path transmits power to the heat pump unit via a heat pump clutch.

[0010] The control unit is a single integrated module or a collection of multiple modules used to collect wind speed and rotational speed, and to control the generator clutch, heat pump clutch and electric valve; the wind speed module and rotational speed module transmit the collected real-time rotational speed signal to the control unit, and the control unit controls the operation of the generator clutch, electric valve and heat pump clutch according to the set control logic.

[0011] When the wind speed is lower than the generator cut-in wind speed, the equipment is in standby mode; when the wind speed is higher than the generator cut-in wind speed, the electric heating element is used for heating; when the wind speed continues to increase and reaches the heat pump unit cut-in wind speed, the heat pump is used for heating alone; as the wind speed continues to increase, when the equipment reaches its maximum speed for the first time, the electric heating element is connected again, and the heat pump and electric heating element provide heating simultaneously; as the wind speed continues to increase, when the equipment reaches its maximum speed for the second time, the yaw program is initiated.

[0012] The generator is directly connected to the electric heating tube; when the generator is running, the generated electrical energy is directly transmitted to the electric heating tube, which heats the water output from the heat pump unit.

[0013] The active engagement of the generator clutch enables electric heating.

[0014] The active engagement of the heat pump clutch enables the heat pump to provide heating.

[0015] Beneficial effects:

[0016] This invention relates to a scheme coupling an electric heating element with a heat pump. By controlling the connection conditions of the electric heating element and the heat pump, it achieves low-speed start-up and increases the device's water supply temperature through secondary heating by the electric heating element. This invention effectively reduces the start-up wind speed of the wind-powered heating device; compared to devices without this scheme, it can further reduce the start-up wind speed from the original 6 m / s to 3 m / s. This invention effectively increases the rated operating wind speed of the wind-powered heating device; compared to devices without this scheme, it can increase the rated operating wind speed from the original 8 m / s to approximately 10 m / s. This invention effectively increases the rated heating capacity; compared to devices without this scheme, it can increase the rated heating capacity by approximately 30%. This invention effectively improves wind energy utilization efficiency; compared to devices without this scheme, it can increase wind energy utilization efficiency by approximately 25%. This invention effectively increases the water supply temperature of the wind-powered heating device; compared to devices without this scheme, at ambient temperatures below -15°C, this invention can increase the water supply temperature from the original 50°C to above 85°C. The hardware modules used in this invention are all common modules available on the market, eliminating the need for custom development and reducing hardware development costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the principle of the present invention;

[0018] Figure 2 This is a schematic diagram of the principle of the present invention;

[0019] Figure 3 This is a schematic diagram showing the connection between the generator and the electric heating element of the present invention;

[0020] Figure 4 This is a schematic diagram of the operating status of the generator and heat pump under different wind speeds as described in this invention;

[0021] Figure 5 This is a flowchart illustrating the device startup process described in this invention.

[0022] In the diagram: 1-Control unit, 2-Wind turbine, 3-Generator, 4-Generator clutch, 5-Wind speed module, 6-Heat pump clutch, 7-Electric heating element, 8-Electric valve, 9-Heat pump unit, 10-Speed ​​module. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] As shown in the figure

[0025] The generator clutch (4) is a clutch device that can transmit the power of the wind turbine to the generator (3).

[0026] The generator (3) is a permanent magnet AC generator. The heat pump clutch (6) is a clutch device that can transmit power from the wind turbine to the heat pump unit. The heat pump unit (9) is a device for transferring heat energy from a low-grade heat source to a high-grade heat source. The wind speed module (5) is a sensor installed on the wind turbine to monitor the real-time wind speed under the current environment. The speed module (10) is a speed sensor that can measure the speed of the output shaft at the bottom of the wind turbine. The electric heating tube (7) is an electric heating device connected in parallel with the water outlet pipe of the heat pump unit. The electric valve (8) is an electric valve installed on the water outlet pipe of the heat pump unit.

[0027] The wind turbine (2) transmits power to the ground and divides the power into two paths. One path transmits power to the generator (3) via the generator clutch (4), and the other path transmits power to the heat pump unit (9) via the heat pump clutch (6). The wind speed module (5) is installed on the wind turbine (2), and the speed module (6) is installed upstream of the clutch power source to directly measure the output speed of the wind turbine (2).

[0028] Figure 2 This is a schematic diagram of the device. The control unit (1) is a single integrated module or a collection of multiple modules that can collect wind speed and rotation speed and control the generator clutch (4), heat pump clutch (6), and electric valve (8). All hardware modules used are existing technologies, and they are common modules on the market, so there is no need for custom development, thus reducing hardware development costs.

[0029] The wind speed module (5) and the speed module (10) transmit the collected wind speed and real-time speed signals to the control unit (1). The control unit (1) controls the operation of the generator clutch (4), the electric valve (8), and the heat pump clutch (6) according to the set control logic. The active engagement of the generator clutch (4) can realize the electric heating function. The active engagement of the heat pump clutch (6) can realize the heat pump heating function.

[0030] Figure 3 This is a schematic diagram of the connection between the generator (3) and the electric heating tube (7). The generator (3) is directly connected to the electric heating tube (7) without going through an inverter. When the generator (3) is running, the generated electrical energy is directly transmitted to the electric heating tube (7), which heats the water outlet of the heat pump unit (9).

[0031] Figure 4 This is a schematic diagram of the operating status of the generator and heat pump under different wind speeds. The wind speed at which the generator (3) is engaged is the wind speed at which the wind turbine (2) can independently drive the generator (3) to start generating electricity normally. By manually engaging the generator clutch (4) and observing the heating state of the electric heating tube under different wind speeds, the lowest wind speed at which the electric heating tube can heat normally with minimum power is the generator engagement wind speed.

[0032] The cut-in airflow speed of the heat pump unit (9) is the airflow speed at which the fan (2) can independently drive the heat pump unit (9) for normal heating. By independently engaging the heat pump clutch (6) and observing the heating status of the heat pump unit (9) without airflow, the lowest airflow speed at which the fan (2) can independently drive the heat pump unit (9) for normal heating at the lowest operating speed of the heat pump unit (9) is the cut-in airflow speed of the heat pump unit (9). The minimum operating speed of the heat pump unit (9) can be obtained by consulting the heat pump unit compressor product manual, and is usually 500 rpm or 750 rpm. The maximum speed is usually 1450 rpm.

[0033] When the wind speed is lower than the generator (3) cut-in wind speed, the equipment is in standby mode. When the wind speed is higher than the generator (3) cut-in wind speed, electric heating is used for heating.

[0034] As the wind speed continues to increase, once the wind speed reaches the cut-in wind speed of the heat pump unit (9), the heat pump is used to provide heat independently.

[0035] As the wind speed continues to increase, once the equipment reaches its maximum speed for the first time, the electric heating is activated, and the heat pump and electric heating supply heat simultaneously.

[0036] As the wind speed continues to increase, once the equipment reaches its maximum speed for the second time, the yaw program is activated. The equipment's rotor deflects, actively reducing the frontal area to suppress the increase in speed.

[0037] Figure 5 This is the equipment startup flowchart. After the startup process is running, the wind speed module (5) monitors the average wind speed V. When the average wind speed V reaches the generator cut-in wind speed V to generate electricity, the control unit (1) disengages the heat pump clutch (6), engages the generator clutch (4), and closes the electric valve (8). At this time, the electric heating function is started.

[0038] Next, the second round of average wind speed determination is performed. When the average wind speed is less than the generator cut-in wind speed V, the generator starts the shutdown process. When the average wind speed is greater than the heat pump unit cut-in wind speed V, the heat pump clutch (6) engages, the generator clutch (4) disengages, and the electric valve (8) opens. At this time, the heat pump heating function is started.

[0039] When the average wind speed is greater than the heat pump cut-in wind speed, the first round of speed determination is performed based on the speed signal of the speed module (10). If the speed decreases to less than the minimum speed N minimum, the system returns to the state when performing the second round of average wind speed determination. The heat pump clutch (6) disengages, the generator clutch (4) engages, and the electric valve (8) closes.

[0040] If the rotational speed increases to a level higher than the maximum rotational speed N of the equipment, the heat pump clutch (6) engages, the generator clutch (4) engages, and the electric valve (8) closes. At this time, the heat pump and electric heating work together to provide heat.

[0041] Next, a second round of speed determination is performed based on the speed signal from the speed module (10). If the speed decreases to below the minimum speed N_minimum, the system returns to the state of the first round of speed determination, the heat pump clutch (6) engages, the generator clutch (4) disengages, and the electric valve (8) opens. If the speed continues to increase and exceeds the maximum speed N_max of the equipment again, the yaw process is executed. The equipment's wind turbine deflects, actively reducing the frontal area to suppress the increase in speed.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. The present invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A control method for a wind power heating device that couples an electric heating element with a heat pump for heating, characterized in that: The wind-powered heating device includes a control unit, a wind turbine, a generator, a generator clutch, a wind speed module, a heat pump clutch, an electric heating element, an electric valve, a heat pump unit, and a speed module. The control unit is connected to the wind turbine, generator, generator clutch, wind speed module, heat pump clutch, electric valve, heat pump unit, and speed module. The generator clutch is connected to both the wind turbine and generator. The heat pump clutch is connected to both the wind turbine and heat pump unit, and the heat pump unit is connected to both the inlet and outlet water pipes. The electric heating element is connected to the generator and is also connected to the water supply pipe. The wind speed module is mounted on the wind turbine, and the speed module is installed upstream of the generator clutch and heat pump clutch to directly measure the output speed of the wind turbine. The control method includes: the wind turbine transmits power to the ground and divides the power into two paths, one path of power is transmitted to the generator via the generator clutch; the other path of power is transmitted to the heat pump unit via the heat pump clutch. The control unit is a single integrated module or a collection of multiple modules used to collect wind speed and rotational speed, and to control the generator clutch, heat pump clutch and electric valve; the wind speed module and rotational speed module transmit the collected real-time rotational speed signal to the control unit, and the control unit controls the operation of the generator clutch, electric valve and heat pump clutch according to the set control logic; After the startup process is running, the wind speed module monitors the average wind speed V. When the average wind speed V reaches the generator cut-in wind speed V to generate electricity, the control unit disengages the heat pump clutch, engages the generator clutch and closes the electric valve. At this time, the electric heating function is started. Next, the second round of average wind speed determination is carried out. When the average wind speed is less than the generator cut-in wind speed V, the generator starts the shutdown process. When the average wind speed is greater than the heat pump unit cut-in wind speed V, the heat pump clutch is engaged, the generator clutch is disengaged, the electric valve is opened, and the heat pump heating function is started. Once the average wind speed exceeds the heat pump's cut-in wind speed, the first round of speed determination is performed based on the speed signal from the speed module. If the speed decreases to below the minimum speed N, the determination is made accordingly. 最低 Then return to the state when the second round of average wind speed determination was performed, the heat pump clutch disengages, the generator clutch engages, and the electric valve closes; If the rotation speed increases to be higher than the equipment's maximum rotation speed N 最高 Then, the heat pump clutch engages, the generator clutch engages, and the electric valve closes; at this time, the heat pump and electric heating work together to provide heat. Next, a second round of speed determination is performed based on the speed signal from the speed module. If the speed decreases to less than the minimum speed N... 最低 Then it returns to the state from the first round of speed determination: the heat pump clutch engages, the generator clutch disengages, and the electric valve opens; if the speed continues to increase and again exceeds the equipment's maximum speed N, it will return to the state from the first round of speed determination. 最高 Then, the yaw procedure is executed.

2. The control method for the wind power heating device according to claim 1, characterized in that: The electric heating tube is an electric heating device connected in parallel with the water outlet pipe of the heat pump unit.

3. The control method for the wind power heating device according to claim 1, characterized in that: The electric valve is an electric valve installed on the outlet water pipe of the heat pump unit.

4. The control method according to claim 1, characterized in that: The active engagement of the generator clutch enables electric heating.

5. The control method according to claim 4, characterized in that: The generator is directly connected to the electric heating tube; when the generator is running, the generated electrical energy is directly transmitted to the electric heating tube, which heats the water output from the heat pump unit.

6. The control method according to claim 1, characterized in that: The active engagement of the heat pump clutch enables the heat pump to provide heating.

Images