CN213088087U

CN213088087U - ORC control system applied to mobile device and application device thereof

Info

Publication number: CN213088087U
Application number: CN202021763643.9U
Authority: CN
Inventors: 陈一峰; 李锋辉; 周建刚; 林钢
Original assignee: Shanghai Mufan Power Technology Co ltd
Current assignee: Shanghai Mufan Power Technology Co ltd
Priority date: 2020-08-06
Filing date: 2020-08-21
Publication date: 2021-04-30
Anticipated expiration: 2030-08-21

Abstract

The utility model provides a be applied to mobile device's ORC control system and application apparatus thereof, include: a control sub-device and an ORC device; the ORC device at least comprises a turbine device, a conveying device and a switch device; the output end of the turbine device is connected with a motor device; the control sub-device comprises a conveying control module and a turbine control module, the conveying control module at least comprises a conveying starting control module and a conveying stopping control module, and the conveying starting control module and the conveying stopping control module are in signal connection with the conveying device; the turbine control module is respectively connected with the turbine device and the switch device through signals. The utility model discloses have opening of control ORC device open stop, open and stop detection, regulation and control function, can adapt to the control demand of ORC device well, can effectively improve heat utilization, and system stability is strong.

Description

ORC control system applied to mobile device and application device thereof

Technical Field

The utility model relates to a technical field that waste gas recovery recycled, concretely relates to be applied to mobile device's ORC control system and application apparatus thereof.

Background

With the increasing severity of the situation of energy shortage, energy conservation and emission reduction become the subject of the development of the times. For the vehicle engine, the energy effectively utilized by the vehicle engine only accounts for about one third of the total heat, and most of the energy is mainly lost in the form of exhaust emission and heat dissipation. Among various proposals for efficiently utilizing the waste heat of the engine, the ORC cycle (organic rankine cycle) is favored by researchers because of its high cycle utilization efficiency.

Among other things, efficient and safe operation of the ORC cycle system is limited by the transient characteristics of the heat source (engine exhaust), which depend on driving conditions. Optimal operation is typically only achieved within a narrow range of working fluid evaporating pressures and temperatures. The dissociation and degradation of the working medium limits the maximum applicable working temperature, while the lower limit is fixed by condensation of the working medium in the expansion device. Therefore, precise control system design is critical to optimizing ORC system operation.

Due to the fact that multiple working conditions need to be tested, adjustment of the system cannot be achieved through manual operation in real time, and errors are prone to being caused by manual adjustment.

SUMMERY OF THE UTILITY MODEL

The application provides an ORC control system and application apparatus for mobile device has realized opening in the ORC device and has stopped, has stopped functions such as opening and stopping detection, warning, solves among the prior art, because ORC circulation system's regulation is because manual regulation easily produces the error, and can't be through the problem of manual operation control.

The application provides an ORC control system for a mobile device, comprising:

a control sub-device and an ORC device; the ORC device at least comprises a turbine device, a conveying device and a switch device; the output end of the turbine device is connected with a motor device;

the control sub-device comprises a conveying control module and a turbine control module,

the conveying control module at least comprises a conveying starting control module and a conveying stopping control module, and the conveying starting control module and the conveying stopping control module are in signal connection with the conveying device; the turbine control module is respectively in signal connection with the turbine device and the switch device.

Further preferably, the ORC device further comprises a liquid storage device, the liquid storage device is used for storing liquid organic media, and a liquid level signal of the organic media is detected; the liquid storage device is in signal connection with the conveying starting control module, and the conveying starting control module is in signal connection with a motion valve of the conveying device; the conveying starting control module is interlocked with a liquid level signal of the liquid storage device and used for determining whether starting conditions are met.

Further preferably, the ORC device further comprises a frequency conversion device, and the frequency conversion device is in signal connection with the conveying start control module and the conveying stop control module respectively.

Further preferably, the control sub-device comprises a conveying variable-frequency control module; the conveying variable-frequency control module is in signal connection with the variable-frequency device and is used for adjusting the output frequency of the variable-frequency device, controlling the output flow of the organic medium in the conveying device by controlling the running frequency of a moving valve of the conveying device and adapting to different working conditions.

Further preferably, the control sub-device further comprises a switch control module; the switch control module is in signal connection with the switch device;

and when the switch control module receives an opening adjusting instruction in the switch device, the switch control module outputs an opening adjusting signal to adjust the opening of the switch device, so that the flow of the waste gas is adjusted.

The present application provides a heavy truck exhaust energy recovery device employing an ORC control system for a mobile device as claimed in any one of the above, the ORC control system comprising: the system comprises a control sub-device and an ORC device, wherein the ORC device comprises a turbine device and a switching device, the output end of the turbine device is connected with a main relay of the heavy truck, the control sub-device comprises a turbine control module, and the turbine control module comprises a turbine interlocking control module; the turbine interlocking control module is in signal connection with the turbine device, receives a turbine stopping signal, interlocks and closes switches of the turbine device and the main relay, and then controls the switch device to be opened.

Further preferably, the turbine control module further comprises a turbine signal control module, and the turbine signal control module is in signal connection with the turbine device and the turbine interlocking control module;

the turbine signal control module receives signals including a main relay trip signal, an emergency stop signal and an on-site operation emergency stop signal, and is used for interlocking with the rotating speed of a high-speed shaft, bearing vibration, oil supply pressure, dry gas sealing pressure and a generator fault trip signal on the heavy truck respectively, and after the control signal sent to the turbine device is obtained and identified as the turbine stop signal, the turbine stop signal is fed back to the turbine interlocking control module.

Further preferably, the ORC device further comprises a smoke switch, the control sub-device comprises a smoke control module, the smoke control module is in signal connection with the smoke bypass switch and is used for controlling the opening and closing of the smoke switch, the ORC device is used for controlling the closing of the smoke switch when being started, and the ORC device is used for controlling the opening of the smoke switch when being closed.

Compared with the prior art, the beneficial effects of the application are as follows:

(1) the utility model discloses a be applied to ORC control system of mobile device has to open the conveyor in the ORC device and stops, open and stop the function that detects and regulate and control, effectively avoids because artifical manual error interference that opens and stop and bring.

(2) The utility model discloses a be applied to ORC control system of mobile device, through turbine installation's output and mobile device interlocking setting, effectively guarantee the safety and stability operation of ORC device.

(3) The utility model discloses be applied to mobile device's ORC control system, through evaporation plant's transition heat, even under the unstable condition of operating mode, when the transition heat that leads to evaporation plant changes, also can guarantee the safe operation of ORC device.

(4) The utility model discloses be applied to mobile device's ORC control system, through control frequency conversion device's frequency variation, the rotational speed of control conveyor's motion valve, and then change the transport flow of the organic medium among the conveyor.

(5) The utility model discloses be applied to mobile device's ORC control system, be applied to heavy truck's exhaust energy recovery device, through turbine installation's interlocking control and flue gas control, effective control heavy truck exhaust energy recovery device's safe operation.

Drawings

The invention will be further explained with reference to the drawings and the detailed description below:

fig. 1 is a block diagram of an ORC control system according to an embodiment of the present invention;

FIG. 2 is a block diagram of an ORC control system according to another embodiment of the present invention;

fig. 3 is a schematic diagram of an ORC device in an ORC control system in an embodiment of the present invention;

fig. 4 is an electrical schematic diagram of an embodiment of a conveyor apparatus in an embodiment of the invention;

fig. 5 is a flow chart of the control and start of the conveying device in the embodiment of the present invention;

fig. 6 is a flow chart of the control stop of the conveying device in the embodiment of the present invention;

fig. 7 is a control flow chart of the switching device according to the embodiment of the present invention;

fig. 8 is a flow chart of interlocking control of the turbine unit according to the embodiment of the present invention;

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

Example 1

The present embodiment describes an ORC control system for a mobile device, which is shown in fig. 1-2 and includes a control sub-device 10 and an ORC device 20, wherein the ORC device 20 is a circulation device for recovering waste heat of an organic working medium. The control sub-device 10 of the present embodiment according to one embodiment of the present invention is used to control the ORC device 20, and the control sub-device 10 is used to control the ORC device 20 to start and stop, detect the stop, and adjust the ORC device 20.

The ORC control system applied to the motorized apparatus in the present embodiment includes a control sub-apparatus 10 and an ORC apparatus 20; ORC device 20 comprises at least a turbine device 22, a conveying device 21 and a switching device 23; the output of the turbine unit 22 is connected to a motor unit. The conveying device 21 in this embodiment may be a working medium pump for conveying the organic medium. Switching device 23 is a bypass switch for improving the safety performance of the ORC device.

The control sub-device 10 comprises a conveying control module and a turbine control module, the conveying control module at least comprises a conveying starting control module 11 and a conveying stopping control module 12, and the conveying starting control module 11 and the conveying stopping control module 12 are in signal connection with the conveying device 21; the turbine control module is respectively connected with the turbine device 22 and the switch device 23 through signals.

The application method of the ORC control system applied to the motor-driven device of the embodiment comprises the following steps:

after receiving the conveying control instruction, the conveying start control module 11 and the conveying stop control module 12 control the start and stop of the conveying device 21, and then detect and judge whether the start and stop state of the conveying device 21 is normal by acquiring a start signal, a feedback signal and a frequency signal of the conveying device 21; when the control signal received by the turbine control module is a turbine stop signal, the turbine control module controls to send out an interlocking closing signal to close switches including the turbine device 22 and the mobile device, and then controls the switch device 23 to be opened.

Referring to fig. 3, in one embodiment, ORC device 20 includes at least an evaporation device 25, a turbine device 22, a condensing device 27, a liquid storage device 26, and a delivery device 21; wherein, a circulation pipeline of the ORC device 20 is sequentially communicated with an evaporation device 25, a turbine device 22, a condensing device 27, a liquid storage device 26 and a conveying device 21, and the conveying device 21 is communicated with the evaporation device 25 for realizing a circulation loop of the organic medium in the ORC device 20.

The working process of the organic medium in the circulating loop comprises the following steps: in the ORC device 20, the organic medium in the evaporation device 25 absorbs heat in the waste heat flow of the exhaust gas to generate steam with a certain pressure and temperature, the steam enters the turbine device 22 to expand and do work, and the heat in the organic medium and the kinetic energy in the turbine device 22 are converted with each other, so that the mobile device connected with the turbine device 22 is driven to operate; the steam discharged from the turbine unit 22 is cooled in the condensing unit 27 to release heat, condensed into a liquid state, and stored in the liquid storage unit 26. The evaporation device 25 is communicated with the conveying device 21, and further, an inlet of the conveying device 21 is communicated with an outlet of the liquid storage device 26, so that the conveying device 21 sucks and conveys the organic medium in the liquid storage device 26 to the evaporation device 25.

Further, in such a circulation loop of the organic medium, the turbine device 22 in the ORC device 20 is connected to the exhaust-gas-side outlet of the evaporation device 25, and the opening degree of the inlet valve of the turbine device 22 is adjusted according to the corresponding control command of the control sub-device 10, so that the desired recycling exhaust gas flow rate is achieved. In this embodiment, after the waste heat of the exhaust gas enters the evaporation device 25, the waste heat of the exhaust gas is mixed with the organic medium in the evaporation device 25, the organic medium is vaporized under high temperature and high pressure to be changed into steam, and further, the expansion of the turbine device 22 is used to do work, thereby recovering the energy in the waste heat of the exhaust gas.

In another circulation loop of the organic medium, the ORC device 20 further includes a switching device 23, the switching device 23 is connected to an exhaust-gas-side outlet of the evaporation device 25, the switching device 23, and the condensation device 27 are sequentially communicated in a pipeline of the ORC device 20, and the high-temperature and high-pressure steam in the evaporation device 25 is received through the switching device 23 and then is transmitted to the condensation device 37 to be cooled and condensed into a liquid state. The valve of the switch device 23 is usually in a closed state, and can be opened quickly within 1-5 seconds according to the types and application ranges of different working conditions.

It will be appreciated that the switching device 23 is arranged in parallel with the turbine unit 22 so that the steam generated by the evaporation device 25 does not pass through or reduce the steam passing through the turbine unit 22, thereby improving the safety of the waste heat application in the ORC unit 20 and reducing the risk due to the high pressure and temperature of the steam.

In this embodiment, the organic medium in the circulation loop of the ORC device 20 is a mixture of ethanol and water, so that the high temperature waste heat can be directly heated. The existing organic medium comprises refrigerants R245fa and R134a, and is characterized in that the use temperature is lower and is not more than 150 ℃, otherwise, the decomposition can occur under the condition of high temperature, and the decomposed hydrogen fluoride HF has strong corrosivity, is extremely easy to volatilize and is toxic to people and environment. Moreover, the working medium has greenhouse effect and has destructive effect on ozone, and the refrigerant is expensive. In selecting the organic medium in the ORC device 20 of the present invention, the present embodiment takes into account alcohols through many derivations and experiments. Among them, methanol is extremely toxic, and a small amount of methanol inhaled/ingested by a human body can cause blindness or even death, and methanol is used for manufacturing formaldehyde and pesticides, so that the methanol is not allowed to be applied to automobiles; the ethanol is nontoxic, the ORC cycle performance is good, the ethanol is equivalent to the methanol, the ethanol is easy to obtain, the price is low, the transportation and the storage are convenient, and the ethanol solution is a better choice for being used as the cycle working medium.

Based on this, in the embodiment, a mixture of ethanol and water (for example, ethanol concentration is 95%) is adopted, and through calculation and tests, the ethanol working medium containing a small amount of water can sufficiently absorb heat from the high-temperature smoke of the engine, and the ethanol itself cannot be decomposed at high temperature, so that the obtained high-parameter ethanol steam (high pressure of 3.5MPa, 265C) has higher work-doing capacity, and the ethanol working medium has stable property, low cost and is easy to obtain; in addition, the influence of the pure ethanol on the corrosion of metal materials is greatly reduced, and the service life of equipment is prolonged. The working medium of the ethanol solution is a binary azeotropic mixture of ethanol and water, the mixture has a lower boiling point than a single working medium, the mixture is easier to be heated by a medium-low temperature heat source to generate phase change, the concentration of the ethanol is controlled within the range of 93-96%, ethanol steam containing 4-7% of oxidant water forms an oxide layer film which plays a role in passivation protection on surface materials on the surface of the impeller, and the water content of the ethanol steam with 4-7% has relatively small harm to water corrosion entering the impeller of the high-speed expander.

Referring to fig. 4-6, an embodiment of a method for controlling start and stop of a conveyor 21 is described in an ORC control system for a mobile device according to an embodiment of the present invention.

Based on embodiment 1, the method for controlling the start or stop of the conveyance medium 31 in this embodiment may include the following description.

The ORC device 20 further comprises a storage device 26, wherein the storage device 26 is used for storing the organic medium in a liquid state and detecting a level signal of the organic medium. In this embodiment, for controlling the normal and safe operation of the ORC device 20, the liquid level of the organic working medium in the liquid storage device 26 is monitored, and the situation that the waste heat of the exhaust gas cannot be recycled and utilized when the content of the organic working medium in the liquid storage device 26 is insufficient is avoided, so that the waste heat cannot be supplied to a mobile device for use. In one embodiment, it is desirable to check to determine whether the content of the organic working fluid in the fluid storage device 26 meets a predetermined requirement for normal operation of the ORC device 20, and the ORC device 20 can be started only when the predetermined requirement is met.

The liquid storage device 26 in this embodiment is provided with a liquid level detection device for measuring a liquid level signal of an organic medium in the liquid storage device, thereby effectively monitoring the liquid level of the organic medium in the liquid storage device 26.

The liquid storage device in this embodiment is in signal connection with the delivery start control module 11, and the delivery start control module 11 is in signal connection with the motion valve of the delivery device 21; the delivery start control module 11 determines whether a start condition is met by interlocking with a liquid level signal of the liquid storage device, and the method comprises the following steps:

the conveying starting control module 11 receives a liquid level signal transmitted by the liquid storage device and compares the liquid level signal with a preset liquid level signal; when the liquid level signal is lower than the preset liquid level signal, outputting a conveying stop signal to control a motion valve of the conveying device 21 to stop running; when the liquid level signal is higher than the preset liquid level signal, and the received conveying control instruction is a conveying starting instruction, outputting a conveying starting signal to control the motion valve of the conveying device 21 to start and operate.

In one embodiment, a liquid level signal alarm is arranged, and when a liquid level signal in a liquid storage device is lower than a preset liquid level signal, an alarm output is given to remind that waste heat recovery cannot be carried out at present; when the liquid level signal in the liquid storage device is higher than the preset liquid level signal, the alarm output reminds that the waste heat recovery can be carried out at present.

In addition, automatic control and manual control can be combined, for example, an upper computer is arranged and connected with a liquid level signal alarm which adopts an indicator light, when relevant requirements are met, for example, when the current liquid level signal is higher than a preset liquid level signal, the alarm displays a green indicator light, and an operator can send a conveying starting instruction through manual operation of the upper computer; of course, when the alarm displays the green indicating lamp, the operator can also issue a conveying stop instruction through the manual operation of the upper computer. When the current liquid level signal is lower than the preset liquid level signal, the alarm displays a red indicator light, so that the prompt is not in line with the starting requirement.

The conveying starting control module 11 automatically controls the conveying device 21, when a current liquid level signal in the liquid storage device is higher than a preset liquid level signal, the liquid level signal in the liquid storage device is equivalent to the requirement that the conveying starting control module 11 sends a conveying starting signal, and the conveying device 21 is controlled to start by outputting the conveying starting control signal. The upper computer in this embodiment may be any control terminal that can send a control instruction. Similarly, when the current liquid level signal in the current liquid storage device is lower than the preset liquid level signal, the conveying start control module 11 outputs a conveying stop signal to control the conveying device 21 to stop operating.

The embodiment of the present invention provides an ORC control system for a mobile device, which describes an embodiment of a method for detecting whether a conveying device 21 is normally opened or stopped.

Referring to fig. 5, an embodiment of a method for detecting whether the conveyor 21 is normally started or stopped is shown.

The method for controlling the start and stop of the motion valve of the conveying device 21 by the conveying start control module 11 further comprises the following steps: the conveying starting control module 11 detects a starting feedback signal of a moving valve of the conveying device 21, and compares the starting feedback time of the starting feedback signal with a preset starting feedback time to judge whether the conveying device 21 is normally started. The start feedback signal includes a start signal, a feedback signal and a frequency signal of a moving valve of the conveying device 21, and whether the conveying device 21 is normally started is determined by receiving the start feedback signal.

When the starting feedback time is lower than the preset starting feedback time, judging that the motion valve of the conveying device 21 is started normally; when the starting feedback time is higher than the preset starting feedback time, judging the starting fault of the motion valve of the conveying device 21, outputting a starting fault signal and giving an alarm so as to remind an operator that waste heat recovery of the waste gas cannot be carried out currently; when the motion valve of the transportation device 21 is not fed back, the transportation start instruction is received again, a transportation start signal is output to control the motion valve of the transportation device 21 to start and operate, the start feedback time of the motion valve of the transportation device 2126 is continuously detected, and then whether the transportation device 21 is normally started or not is judged.

In one embodiment, the ORC control system is connected with an upper computer, and when the starting feedback time is higher than the preset starting feedback time, a conveying starting fault signal is output and an alarm is given; the upper computer receives the starting fault signal feedback of the conveying device 21 and sends a conveying starting instruction under manual or automatic control. The upper computer in this embodiment may be any control terminal that can send a control instruction.

Further, in an embodiment, the preset starting feedback time is 5s, if the conveying starting control module 11 immediately detects (is lower than the preset starting feedback time) that a starting feedback signal is received, the operation of starting the moving valve of the conveying device 21 is automatically controlled or manually controlled by the upper computer, and then the operation frequency of the moving valve of the conveying device 21 is adjusted; if the delay of the start feedback signal is detected to be 5S, a conveying start fault signal is output and is reported to the upper computer in an alarm mode, and if the delay of the detection is detected to be 5S, the start feedback signal of the moving valve of the conveying device 21 is not received, the operation of controlling the start of the moving valve of the conveying device 21 is returned, so that the conveying start control module 11 outputs the conveying start signal again.

Referring to fig. 6, an embodiment of a method of determining whether the conveying device 21 is normally stopped is detected.

The conveying stop control module 12 is in signal connection with a motion valve of the conveying device 21; the application method comprises the following steps:

when the received conveying control instruction is a conveying stop instruction, the conveying stop control module 12 outputs a conveying stop signal, receives closing feedback time of a motion valve of the conveying device 21, and compares the closing feedback time with preset closing feedback time to judge whether the conveying device 21 normally stops;

when the closing feedback time is lower than the preset closing feedback time, outputting a conveying stop signal to control a motion valve of the conveying device 21 to stop running;

when the closing feedback time is higher than the preset closing feedback time or the closing feedback signal of the moving valve of the conveying device 21 is not received, outputting a conveying stop failure signal and giving an alarm, continuously receiving a conveying stop instruction, and outputting a conveying stop signal to control the conveying moving valve to stop running.

In one embodiment, the preset closing feedback time is 5s, and when the closing feedback time is less than 5s, the delivery stop control module 12 outputs a delivery stop signal to control the motion valve of the delivery device 21 to stop running. In this example, a feedback time of less than 5s may be considered as an immediate detection of the feedback signal. When the closing feedback time is higher than 5s or when the closing feedback signal of the moving valve of the conveyor 21 is not received, a conveyance stop failure signal is output, and a conveyance stop failure alarm is output. The conveyance stop control module 12 continues to receive the conveyance stop instruction and outputs a conveyance stop signal to continue to control the stop operation of the movement valve of the conveyance device 21. Of course, if the operation here fails to stop the control of the conveyance device 21, the conveyance stop instruction operation continues to be received.

The ORC device 20 in this embodiment further includes a frequency conversion device 24, and the frequency conversion device 24 is in signal connection with the transportation start control module 11 and the transportation stop control module 12, respectively, and controls the operation frequency of the moving valves of the transportation device 21 through the frequency conversion device 24 so as to control the flow rate of the organic medium absorbed by the transportation device 21 from the liquid storage device 26.

In this embodiment, the method for controlling the start and stop of the frequency conversion device 24 includes: when the conveying starting control module 11 detects that the conveying device 21 is normally started, the frequency conversion device 24 is controlled to be started; when the conveyance stop control module 12 detects that the conveyance device 21 is normally stopped, it controls the inverter device 24 to stop.

Further, when the transportation start control module 11 detects that the start feedback time of the transportation device 21 is lower than the preset start feedback time, it detects that the motion valve of the transportation device 21 is started normally, and controls the frequency conversion device 24 to be opened so as to output the flow rate of the organic medium according to the output frequency of the frequency conversion device 24.

When the conveying stop control module 12 detects that the closing feedback time of the conveying device 21 is lower than the preset closing feedback time, the normal closing of the moving valve of the conveying device 21 is detected, and the frequency conversion device 24 is controlled to be closed, so that the moving valve of the conveying device 21 stops running and the frequency conversion device 24 is controlled to be closed.

Referring to fig. 7, an embodiment of the present invention is described for an ORC control system for a mobile device that regulates the output flow of delivery device 21.

The present embodiment provides an ORC control system for a mobile device, which includes a control sub-device 10 and an ORC device 20, wherein the ORC device 20 further includes a frequency conversion device 24, and the frequency conversion device 24 in the present embodiment is communicated with an outlet of the conveying device 21 and is used for controlling the operation frequency of a moving valve of the conveying device 21 so as to control the flow rate of the organic medium absorbed by the conveying device 21 from the liquid storage device 26.

Further, the frequency conversion device 24 in this embodiment is respectively connected to the conveying start control module 11 and the conveying stop control module 12 by signals; the method for controlling the starting and stopping of the frequency conversion device 24 comprises the following steps:

when the conveying starting control module 11 detects that the conveying device 21 is normally started, the frequency conversion device 24 is controlled to be started; when the conveyance stop control module 12 detects that the conveyance device 21 is normally stopped, it controls the inverter device 24 to stop.

The control sub-device 10 comprises a conveying variable-frequency control module 16; the conveying variable-frequency control module 16 is in signal connection with the variable-frequency device 24 and is used for regulating and controlling the output frequency of the variable-frequency device 24, controlling the output flow of the organic medium in the conveying device 21 by controlling the operating frequency of a motion valve of the conveying device 21 and adapting to different working conditions;

the operation frequency control mode of the conveying variable frequency control module 16 for controlling the motion valve of the conveying device 21 comprises the following steps:

ORC device 20 comprises an evaporation device, which is in communication with conveying device 21;

the excess heat of the evaporation device is obtained as follows: Δ T is equal to T-Ts,

wherein T is the gas outlet temperature of the evaporation device, and Ts is the saturation temperature of the organic medium;

the flow rate of the preset conveying device 21 is: Qt-Zq n,

wherein n is the rotation speed of the moving valve of the conveying device 21, Z is the number of plungers in the conveying device 21, and q is the flow rate of a single plunger under a single stroke;

the actual flow rate of the conveyor 21 is obtained as follows: q is Q-Qt- Δ Q,

wherein Δ Q is the internal leakage;

wherein the heat absorbed by the organic medium is: h-cm deltat,

wherein c is the specific heat capacity of the organic medium, m is the mass of the organic medium, Δ t is the temperature rise, wherein m is ρ × Q, wherein ρ is the density of the organic medium;

the operation frequency of the moving valve of the conveyor 21 was obtained as follows:

the control sub-device 10 further comprises a switch control module 13; the switch control module 13 is in signal connection with the switch device 23; when receiving the opening degree adjustment command from the opening/closing device 23, the opening/closing control module 13 outputs an opening degree adjustment signal to adjust the opening degree of the opening/closing device 23, thereby adjusting the flow rate of the exhaust gas.

In the pipeline of the ORC device 20, the evaporation device 25, the switch device 23, and the condensation device 27 are sequentially connected, and the high-temperature and high-pressure steam in the evaporation device 25 is received by the switch device 23, and then is transmitted to the condensation device 27 to be cooled and condensed into a liquid state.

Further, the frequency conversion control module 16 implements the following manner for controlling the operation frequency of the moving valve of the conveying device 21:

in this embodiment, the frequency conversion control module 16 obtains the temperatures of the evaporation device 25 and the organic working medium respectively, and can measure the temperature through, for example, infrared temperature measurement or other temperature measuring devices.

In this embodiment, the superheat Δ T' of the evaporation device 25 under an optimal condition is first set, and when the actual Δ T changes, a deviation signal is generated, and at this time, the frequency of the frequency conversion device 24 is changed by the PID controller, so as to control the rotation speed of the pump, and further change the flow rate of the pump.

Further, the excess heat of the evaporation device 25 is obtained as: and delta T is T-Ts, wherein T is the outlet gas temperature of the evaporation device 25, and Ts is the saturation temperature of the organic working medium. The flow rate of the preset conveying device 21 in the frequency conversion control module 1626 is: qt is Zq n, where n is the rotational speed of the delivery device 21, Z is the number of plungers in the delivery device 21, and q is the flow rate at a single plunger stroke. The actual flow rate of the conveying device 21 obtained in the frequency conversion control module 1626 is: q ═ Qt- Δ Q, where Δ Q is the internal leakage; wherein, the heat absorbed by the organic working medium is as follows: h ═ cm Δ t, where c is the specific heat capacity of the organic medium, m is the mass of the organic medium, Δ t is the temperature rise, where m ═ ρ × Q, where ρ is the density of the organic medium; it follows from this that the operating frequency of the moving valves of the conveyor 21 is:

thereby controlling the output flow of the conveying device 21 toThe device is suitable for different working conditions.

Example 2

This embodiment is according to the utility model discloses a specific application of an applied to mobile device's ORC control system of an embodiment, specifically, this embodiment provides a heavy truck exhaust energy recovery device, can include: the control device comprises a control sub-device 10 and an ORC device 20, wherein the ORC device 20 comprises a turbine device 22 and a switching device 23, the output end of the turbine device 22 is connected with a main relay of the heavy truck, the control sub-device 10 comprises a turbine control module, and the turbine control module comprises a turbine interlocking control module 14; referring to fig. 8, the turbine interlocking control module 14 is in signal connection with the turbine device 22, receives a turbine stop signal, interlocks the turbine device 22 and switches of a main relay, and then controls the switch device 23 to be opened.

Further, the turbine control module further comprises a turbine signal control module 15, and the turbine signal control module 15 is in signal connection with the turbine device 22 and the turbine interlocking control module 14; the turbine signal control module 15 receives signals including a main relay trip signal, an emergency stop signal and a local operation emergency stop signal, and is used for interlocking with a high-speed shaft rotating speed, bearing vibration, oil supply pressure, dry gas sealing pressure and a generator fault trip signal on the heavy truck respectively, and after acquiring and identifying that the control signal sent to the turbine device 22 is the turbine stop signal, the turbine signal control module feeds back the turbine stop signal to the turbine interlocking control module 14.

In the embodiment, when the rotating speed of the high-speed shaft is more than or equal to 10.5krpm, a stop signal is output; when the vibration of the bearing is more than or equal to 25 mu m, outputting a stop signal; when the oil supply pressure is less than or equal to 1.6barg, outputting a shutdown signal; when the dry gas sealing pressure is less than or equal to 2.5barg, outputting a shutdown signal; and outputting a stop signal when receiving the motor fault signal.

The embodiment provides a heavy truck exhaust gas energy recovery device, still includes flue gas switch 30, and control sub-device 10 includes flue gas control module 17, and flue gas control module 17 and flue gas bypass switch signal connection for control flue gas switch 30 opens and stops, and when ORC device 20 starts, is used for controlling flue gas switch 30 and closes, and when ORC device 20 closed, is used for controlling flue gas switch 30 and opens to directly discharge after the tail gas of heavy truck does not pass through evaporimeter 25.

Referring now to fig. 1, an embodiment of the ORC control system for an exhaust gas energy recovery device of a heavy truck includes three components, namely a control sub-device 10, an ORC device 20, and a smoke switch 30. The specific workflow and energy transfer process of the four components are described below:

the control sub-apparatus 10: the control sub-device 10 is used for receiving corresponding control instructions and comprises a conveying starting control module 11, a conveying stopping control module 12, a switch control module 13, a turbine interlocking control module 14, a turbine signal control module 15, a frequency conversion control module 16 and a flue gas control module 17.

The ORC device 20: ORC device 20 includes an evaporation device 25, a turbine device 22, a condensing device 27, a liquid storage device 26, a delivery device 21, and a switching device 23.

In this embodiment, the main shaft of the turbine device 22 is coupled to the rotating shaft of the motor of the heavy truck, so that the kinetic energy converted by the expansion of the turbine device 22 is converted into the kinetic energy of the motor for use.

The turbocharger of the engine in the heavy truck outputs the waste flue gas with the temperature of 120-200 ℃, and the waste flue gas enters the evaporation device 25 and transfers the heat to the organic medium, in the embodiment, the heat is transferred to the ethanol working medium to generate the steam of the organic medium. The temperature of the exhaust gas discharged by the engine of the heavy truck exceeds 350 ℃, passes through the ORC device 20 in the embodiment, and then is mixed with the organic working medium for secondary full utilization, so that the energy utilization efficiency is improved.

In this embodiment, a water-cooling condensing device or an air-cooling condensing device is used for cooling, and a cooling tower 28 is provided on the condensing device 27. Further, a water-cooling condensing device is adopted, and external cooling water passes through the condensing device 27 to absorb heat of the gaseous ethanol working medium, so that the gaseous ethanol working medium becomes a low-temperature and low-pressure liquid ethanol solution.

In this embodiment, the ethanol solution is a mixture of ethanol and water, and the concentration of ethanol is controlled within the range of 93% to 96%.

Impellers in the turbine unit 22, which rotate at up to 80krpm, are made of lightweight titanium alloys in order to meet the rotor dynamics design. However, pure ethanol steam can generate stress corrosion on the titanium alloy material impeller at a high temperature of more than 200 ℃, and the long-term safe operation of the impeller is influenced. Therefore, with ethanol vapor containing a small amount of oxidant (water), an oxide layer film can be formed on the surface of the titanium material due to the action of the oxidant water, which plays a passivation protection role on the main titanium alloy, but the excessive water can significantly reduce the cycle thermal performance of the ORC device 20, and under the working pressure of the turbocharger of the engine in a heavy truck (35barg), even if heated by high-temperature flue gas, the water may not be completely evaporated into a dry gas state, and the water in the form of small droplets enters a high-speed expansion machine to cause water erosion damage of the impeller. Through calculation, the water content of 4-7% can play a good passivation protection role on the titanium alloy impeller, the water erosion harm to the impeller is the lowest, and the performance reduction on ORC is small.

The existing ORC device 20 utilization scheme is: the cylinder sleeve water is adopted to absorb the heat of the tail gas of the engine in the heavy truck, and the temperature rise of the cylinder sleeve water is limited, generally 98-110 ℃. The cylinder liner water is used as a heat source to drive ORC low-boiling point media such as R134a and R245fa refrigerants, and because the temperature of the heat source is low, the pressure and temperature parameters of the heated refrigerants are low, and the temperature is usually only 70-90 ℃, the cycle efficiency is relatively low and is only about 5%; and the ORC circulating medium is directly heated by adopting the tail gas of the engine (for example, an ethanol solution working medium with the ethanol concentration of 95 percent is adopted), the temperature of the ethanol steam can reach about 260 ℃, the high initial parameter of the steam brings about great improvement on the circulating efficiency, the efficiency reaches 12 percent, and the system has higher working capacity.

The flue gas switch 30: the flue gas switch 30 is opened when the ORC device 20 has been shut down or failed, at which time the engine exhaust flue gases from the heavy duty truck are no longer passed through the evaporator 25 and are directly exhausted from the exhaust gas channel.

The control sub-apparatus 10 of the present invention may be considered to be a sequential list of executable instructions for implementing logical functions, and in particular may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions.

For the purposes of this description, a computer readable medium can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the implementation of the various embodiments may be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be stored in a computer readable storage medium, and the program may be executed by a computer to instruct the relevant hardware, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims

1. An ORC control system for a powered device, comprising:

2. The ORC control system for a powered device of claim 1, wherein the ORC device further comprises a reservoir for storing the organic medium in a liquid state, the level signal of the organic medium being detected; the liquid storage device is in signal connection with the conveying starting control module, and the conveying starting control module is in signal connection with a motion valve of the conveying device; the conveying starting control module is interlocked with a liquid level signal of the liquid storage device and used for determining whether starting conditions are met.

3. The ORC control system for a powered device of claim 2, further comprising a frequency conversion device in signal communication with said transport start control module and said transport stop control module, respectively.

4. The ORC control system for a powered device of claim 3, wherein said control sub-device comprises a transport variable frequency control module; the conveying variable-frequency control module is in signal connection with the variable-frequency device and is used for adjusting the output frequency of the variable-frequency device, controlling the output flow of the organic medium in the conveying device by controlling the running frequency of a moving valve of the conveying device and adapting to different working conditions.

5. The ORC control system for a powered device of claim 1, wherein said control sub-device further comprises a switch control module; the switch control module is in signal connection with the switch device; and when the switch control module receives an opening adjusting instruction in the switch device, the switch control module outputs an opening adjusting signal, adjusts the opening of the switch device and adjusts the flow of the waste gas.

6. A heavy truck exhaust energy recovery device employing the ORC control system for a motor vehicle according to any one of claims 1 to 5, said ORC control system comprising: the system comprises a control sub-device and an ORC device, wherein the ORC device comprises a turbine device and a switching device, the output end of the turbine device is connected with a main relay of the heavy truck, the control sub-device comprises a turbine control module, and the turbine control module comprises a turbine interlocking control module; the turbine interlocking control module is in signal connection with the turbine device, receives a turbine stopping signal, interlocks and closes switches of the turbine device and the main relay, and then controls the switch device to be opened.

7. The exhaust gas energy recovery device of the heavy truck according to claim 6, wherein the turbine control module further comprises a turbine signal control module, and the turbine signal control module is in signal connection with the turbine device and the turbine interlocking control module;

8. The exhaust gas energy recovery device for heavy-duty trucks of claim 6, further comprising a flue gas switch, wherein said control sub-device comprises a flue gas control module, said flue gas control module is in signal connection with said flue gas bypass switch for controlling the on/off of said flue gas switch, said ORC device is for controlling the off of said flue gas switch when it is turned on, and said ORC device is for controlling the on of said flue gas switch when it is turned off.