CN118148729A

CN118148729A - Waste heat recovery control method, system, device, equipment and storage medium

Info

Publication number: CN118148729A
Application number: CN202410368671.7A
Authority: CN
Inventors: 蒋兆杰; 孙爱洲; 秦琳琳; 陆召振; 高崴
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2024-03-28
Filing date: 2024-03-28
Publication date: 2024-06-07

Abstract

The embodiment of the invention discloses a waste heat recovery control method, a system, a device, equipment and a storage medium. The method is applied to a waste heat recovery control system, and the system comprises the following steps: a heat source subsystem and a medium circulation subsystem; the heat source subsystem is connected with the medium circulation subsystem through an evaporator; the heat source subsystem is used for controlling the waste heat flow of the evaporator; the medium circulation subsystem is used for controlling the medium flow of the expansion generator. The method comprises the following steps: acquiring a first temperature difference between a waste heat inlet and a waste heat outlet of an evaporator in a heat source subsystem, a second temperature difference between a medium outlet and a medium inlet of the evaporator in a medium circulation subsystem, and a third temperature difference between a medium inlet and a medium outlet of an expansion generator in the medium circulation subsystem; according to the at least one temperature difference, the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem are controlled, so that the reliable operation of the system can be ensured.

Description

Waste heat recovery control method, system, device, equipment and storage medium

Technical Field

The invention relates to the technical field of energy-saving and environment-friendly treatment, in particular to a waste heat recovery control method, a system, a device, equipment and a storage medium.

Background

During the combustion work of the engine, excessive heat is generated. Energy waste is caused if the surplus heat is directly released. And the heat efficiency of the engine can be improved by recycling the waste heat.

When waste heat is recovered in the prior art, all the waste heat is usually recovered and reused, and the load capacity of devices in waste heat recovery is easily ignored, so that the risk of downtime of the system is high. Therefore, it is needed to provide a waste heat recovery control method, which controls the waste heat flow in waste heat recovery, and ensures stable and reliable operation of the system while realizing efficient waste heat recovery.

Disclosure of Invention

The invention provides a waste heat recovery control method, a system, a device, equipment and a storage medium, so that the system can be ensured to run stably and reliably while high-efficiency waste heat recovery is realized.

According to an aspect of the present invention, there is provided a waste heat recovery control method applied to a waste heat recovery control system, the system including: a heat source subsystem and a medium circulation subsystem; wherein the heat source subsystem is connected with the medium circulation subsystem through an evaporator; the heat source subsystem is used for acquiring a waste heat source and controlling the flow of waste heat flowing through the evaporator; the medium circulation subsystem is used for controlling the medium flow in the waste heat recovery control system and the medium flow flowing through the expansion generator in the medium circulation subsystem; the method comprises the following steps:

Acquiring a first temperature difference between a waste heat inlet and a waste heat outlet of the evaporator in the heat source subsystem, a second temperature difference between a medium outlet and a medium inlet of the evaporator in the medium circulation subsystem, and a third temperature difference between a medium inlet and a medium outlet of the expansion generator in the medium circulation subsystem;

And controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to at least one of the first temperature difference, the second temperature difference and the third temperature difference.

Optionally, controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to at least one of the first temperature difference, the second temperature difference and the third temperature difference includes:

When the third temperature difference is smaller than the corresponding third temperature difference lower limit value, controlling to reduce the medium flow flowing through the expansion generator in the medium circulation subsystem;

And when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value, controlling to increase the medium flow flowing through the expansion generator in the medium circulation subsystem.

Controlling to reduce the amount of heat remaining in the heat source subsystem through the evaporator when the third temperature difference is less than a corresponding third temperature difference lower limit and the second temperature difference is greater than a corresponding second temperature difference upper limit;

And when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value and the second temperature difference is larger than the corresponding second temperature difference upper limit value, controlling to increase the medium flow flowing through the expansion generator in the medium circulation subsystem.

When the third temperature difference is smaller than the corresponding third temperature difference lower limit value and the first temperature difference is larger than the corresponding first temperature difference upper limit value, controlling to reduce the medium flow flowing through the expansion generator in the medium circulation subsystem;

And controlling to increase the residual heat flowing through the evaporator in the heat source subsystem when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value and the first temperature difference is larger than the corresponding first temperature difference upper limit value.

Optionally, the waste heat recovery control system further includes: a media cooling subsystem; the medium circulation subsystem is connected with the medium cooling subsystem; the medium cooling subsystem is used for cooling the medium after acting in the medium circulation subsystem; the method further comprises the steps of:

And acquiring the outlet temperature of a condenser in the medium cooling subsystem, and controlling to increase the cooling water supply quantity of the condenser in the medium cooling subsystem when the outlet temperature of the condenser is greater than the corresponding upper temperature limit.

Determining an operation condition of the waste heat recovery control system according to at least one of the first temperature difference, the second temperature difference and the third temperature difference;

and controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to the operation condition.

According to another aspect of the present invention, there is provided a waste heat recovery control system including: a heat source subsystem and a medium circulation subsystem; wherein:

the heat source subsystem is connected with the medium circulation subsystem through an evaporator;

The heat source subsystem is used for acquiring a waste heat source and controlling the flow of waste heat flowing through the evaporator;

The medium circulation subsystem is used for controlling the medium flow in the waste heat recovery control system and the medium flow flowing through the expansion generator in the medium circulation subsystem;

the heat source subsystem is also used for monitoring a first temperature difference between the waste heat inlet and the waste heat outlet of the evaporator and transmitting the first temperature difference to the system controller;

The medium circulation subsystem is further used for monitoring a second temperature difference between a medium outlet and a medium inlet of the evaporator and a third temperature difference between the medium inlet and the medium outlet of the expansion generator, and transmitting the second temperature difference and the third temperature difference to a system controller;

The heat source subsystem is further used for acquiring the residual heat of the evaporator determined by the system controller according to at least one of the first temperature difference, the second temperature difference and the third temperature difference, and adjusting the residual heat flowing through the evaporator in the heat source subsystem according to the residual heat of the evaporator;

The medium circulation subsystem is further used for acquiring the medium flow of the expansion generator determined by the system controller according to at least one of the first temperature difference, the second temperature difference and the third temperature difference, and adjusting the medium flow flowing through the expansion generator in the medium circulation subsystem according to the medium flow of the expansion generator.

According to another aspect of the present invention, there is provided a waste heat recovery control device applied to a waste heat recovery control system, the system comprising: a heat source subsystem and a medium circulation subsystem; wherein the heat source subsystem is connected with the medium circulation subsystem through an evaporator; the heat source subsystem is used for acquiring a waste heat source and controlling the flow of waste heat flowing through the evaporator; the medium circulation subsystem is used for controlling the medium flow in the waste heat recovery control system and the medium flow flowing through the expansion generator in the medium circulation subsystem; the device comprises:

The temperature difference acquisition module is used for acquiring a first temperature difference between a waste heat inlet and a waste heat outlet of the evaporator in the heat source subsystem, a second temperature difference between a medium outlet and a medium inlet of the evaporator in the medium circulation subsystem and a third temperature difference between a medium inlet and a medium outlet of the expansion generator in the medium circulation subsystem;

And the flow control module is used for controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to at least one of the first temperature difference, the second temperature difference and the third temperature difference.

According to another aspect of the present invention, there is provided an electronic apparatus including:

At least one processor; and

A memory communicatively coupled to the at least one processor; wherein,

The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the waste heat recovery control method according to any one of the embodiments of the present invention.

According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute the waste heat recovery control method according to any one of the embodiments of the present invention.

According to the technical scheme, the first temperature difference between the waste heat inlet and the waste heat outlet of the evaporator in the heat source subsystem, the second temperature difference between the medium outlet and the medium inlet of the evaporator in the medium circulation subsystem and the third temperature difference between the medium inlet and the medium outlet of the expansion generator in the medium circulation subsystem are obtained; and controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to at least one of the first temperature difference, the second temperature difference and the third temperature difference, so that the problems of residual heat and medium flow control in the residual heat recovery control system during residual heat recovery are solved, and the stable and reliable operation of the system is ensured while the efficient residual heat recovery is realized.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of a waste heat recovery control method according to a first embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a waste heat recovery control system according to a first embodiment of the present invention;

fig. 3 is a flowchart of a waste heat recovery control method according to a second embodiment of the present invention;

fig. 4 is a flowchart of a waste heat recovery control method according to a second embodiment of the present invention;

fig. 5 is a schematic structural diagram of a waste heat recovery control system according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of a waste heat recovery control device according to a fourth embodiment of the present invention;

fig. 7 is a schematic structural diagram of an electronic device implementing the waste heat recovery control method according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

Fig. 1 is a flowchart of a waste heat recovery control method according to a first embodiment of the present invention, where the present embodiment is applicable to a waste heat recovery situation, and specifically, the present embodiment may control the amount of waste heat and the flow rate of medium in a system during waste heat recovery, where the method may be performed by a waste heat recovery control device, where the waste heat recovery control device may be implemented in hardware and/or software, and where the waste heat recovery control device may be configured in a system controller of an electronic device, such as a waste heat recovery control system. The waste heat recovery control method provided by the embodiment of the invention is applied to a waste heat recovery control system. Fig. 2 is a schematic structural diagram of a waste heat recovery control system according to a first embodiment of the present invention. As shown in fig. 2, the waste heat recovery control system includes: a heat source subsystem 100 and a medium circulation subsystem 200; wherein the heat source subsystem 100 is connected with the medium circulation subsystem 200 through the evaporator 111; a heat source subsystem 100 for acquiring a waste heat source and controlling a waste heat flow rate flowing through the evaporator 111; a medium circulation subsystem 200 for controlling the flow of medium in the waste heat recovery control system 200 and the flow of medium through an expansion generator (not shown in fig. 2) in the medium circulation subsystem.

As shown in fig. 1, the method includes:

Step 110, acquiring a first temperature difference between a waste heat inlet and a waste heat outlet of an evaporator in the heat source subsystem, a second temperature difference between a medium outlet and a medium inlet of the evaporator in the medium circulation subsystem, and a third temperature difference between a medium inlet and a medium outlet of an expansion generator in the medium circulation subsystem.

In the embodiment of the invention, the waste heat can be heat contained in tail gas generated in the running process of the engine. For example, the waste heat may be heat in the exhaust gas generated by the engine when the vehicle is in operation. In waste heat recovery, a first temperature difference between a waste heat inlet and a waste heat outlet of an evaporator in a heat source subsystem may be denoted as Δte1. The second temperature difference between the medium outlet and the medium inlet of the evaporator in the medium circulation subsystem may be denoted as Δto1. The third temperature difference between the medium inlet and the medium outlet of the expansion generator in the medium circulation subsystem may be denoted deltato 2. Each temperature difference may be measured by a temperature sensor provided in the system.

Specifically, temperature sensors may be disposed at the waste heat inlet and the waste heat outlet of the evaporator of the heat source subsystem, respectively, and the first temperature difference Δte1 may be determined by measurement values of the two temperature sensors. Temperature sensors are respectively arranged at a medium outlet and a medium inlet of the evaporator in the medium circulation subsystem, and a second temperature difference delta To1 is determined through measurement values of the two temperature sensors. Temperature sensors are respectively arranged at a medium inlet and a medium outlet of the expansion generator in the medium circulation subsystem, and a third temperature difference delta To2 is determined through measurement values of the two temperature sensors.

When the waste heat recovery control system is designed in practice, the first temperature difference, the second temperature difference and the third temperature difference respectively represent that the waste heat recovery control system is in different operation conditions. The expansion generator can be positioned at the upper energy conversion limit by controlling the waste heat recovery control system through at least one of the first temperature difference, the second temperature difference and the third temperature difference. In specific application, the waste heat recovery control system can be controlled through at least one of the first temperature difference, the second temperature difference and the third temperature difference, so that the expansion generator is continuously positioned at the upper limit of energy conversion, maximum conversion efficiency is realized, efficient waste heat recovery utilization is realized, and meanwhile, the waste heat recovery control system is protected, and stable and reliable operation of the waste heat recovery control system is ensured.

Specifically, when the first temperature difference is smaller than the preset lower limit of the first temperature difference, the current residual heat amount of the tail gas is not completely recovered. When the first temperature difference is larger than the preset upper limit of the first temperature difference, the current residual heat quantity of the tail gas is completely recovered. The first temperature difference lower limit and the first temperature difference upper limit can be calibrated through experimental detection. For different waste heat recovery control systems, there may be a difference between specific set values of the first temperature difference lower limit and the first temperature difference upper limit, which is not specifically limited in the embodiment of the present invention.

When the second temperature difference is larger than the preset second temperature difference upper limit, the current medium flow is insufficient, and the medium flow needs to be increased or the residual heat flowing through the evaporator needs to be reduced. The second upper temperature difference limit may be calibrated by experimental detection. For different waste heat recovery control systems, the specific setting values of the upper limit of the second temperature difference may be different, which is not particularly limited in the embodiment of the present invention.

And when the third temperature difference is smaller than a preset third temperature difference lower limit value, indicating that the expansion generator is at an energy conversion upper limit. The third lower temperature difference limit may be calibrated by experimental detection. For different waste heat recovery control systems, the specific setting values of the lower limit of the third temperature difference may be different, which is not particularly limited in the embodiment of the present invention.

Step 120, controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to at least one of the first temperature difference, the second temperature difference and the third temperature difference.

According to the embodiment of the invention, the provided first temperature difference, second temperature difference and third temperature difference represent different operation conditions of the waste heat recovery control system, so that the operation reliability of the waste heat recovery control system can be improved and the expansion generator is ensured to be positioned at the upper limit of energy conversion efficiency by controlling at least one of the first temperature difference, the second temperature difference and the third temperature difference to control the waste heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem.

Specifically, controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to at least one of the first temperature difference, the second temperature difference and the third temperature difference may include: and controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to at least one of the relation between the third temperature difference and the corresponding lower limit value of the third temperature difference, the relation between the second temperature difference and the corresponding upper limit of the second temperature difference and the relation between the first temperature difference and the corresponding upper limit of the first temperature difference.

In an alternative implementation of the embodiment of the present invention, controlling the amount of heat remaining in the heat source subsystem flowing through the evaporator and the flow rate of medium in the medium circulation subsystem flowing through the expansion generator according to at least one of the first temperature difference, the second temperature difference, and the third temperature difference includes: determining the operation condition of the waste heat recovery control system according to at least one of the first temperature difference, the second temperature difference and the third temperature difference; and controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to the operation condition.

Wherein, confirm the operating mode of waste heat recovery control system according to at least one of first temperature difference, second temperature difference and third temperature difference, include: when the first temperature difference is smaller than a preset first temperature difference lower limit, determining that the operation working condition of the waste heat recovery control system is that the waste heat amount of the current tail gas is not completely recovered; when the first temperature difference is larger than a preset first temperature difference upper limit, determining that the operation condition of the waste heat recovery control system is that the waste heat amount of the current tail gas is completely recovered; and when the second temperature difference is larger than the preset second temperature difference upper limit, determining that the operation condition of the waste heat recovery control system is insufficient in current medium flow. And when the third temperature difference is smaller than a preset third temperature difference lower limit value, determining the operation condition of the waste heat recovery control system as that the expansion generator is at an energy conversion upper limit.

Correspondingly, according to the operation condition, controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem, comprising: when the operation condition is that the expansion generator is at the upper limit of energy conversion, controlling and reducing the medium flow passing through the expansion generator in the medium circulation subsystem so as to protect the expansion generator; and when the operation condition does not reach the upper limit of energy conversion of the expansion generator, controlling to increase the medium flow flowing through the expansion generator in the medium circulation subsystem so as to increase the waste heat recovery power, and enabling the expansion generator to be at the upper limit of energy conversion. By dynamic adjustment, the upper limit of energy conversion of the expansion generator can be achieved on the basis of protecting the expansion generator.

According to the operation condition, controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem, and further comprising: when the operation condition is that the expansion generator is at the upper limit of energy conversion and the residual heat of the current tail gas is completely recovered, controlling to reduce the residual heat flowing through the evaporator in the heat source subsystem; and when the operation condition is that the expansion generator is not at the upper energy conversion limit and the residual heat of the current tail gas is completely recovered, controlling to increase the medium flow flowing through the expansion generator in the medium circulation subsystem.

According to the operation condition, controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem, and further comprising: when the operation condition is that the expansion generator is at the upper limit of energy conversion and the residual heat of the current tail gas is completely recovered, controlling and reducing the medium flow flowing through the expansion generator in the medium circulation subsystem; and when the operation condition is that the expansion generator is not at the upper energy conversion limit and the residual heat quantity of the current tail gas is completely recovered, controlling to increase the residual heat quantity flowing through the evaporator in the heat source subsystem.

The temperature difference is used for controlling the residual heat and the medium flow in the residual heat recovery control system, so that the reliability of the system and the energy conversion efficiency of the expansion generator can be improved.

On the basis of the above embodiment, optionally, as shown in fig. 2, the waste heat recovery control system further includes: a media cooling subsystem 300; the medium circulation subsystem 200 is connected with the medium cooling subsystem 300; the medium cooling subsystem 300 is used for cooling the medium after working in the medium circulation subsystem 200.

The waste heat recovery control method further comprises the following steps: and acquiring the outlet temperature of the condenser in the medium cooling subsystem, and controlling to increase the cooling water supply quantity of the condenser in the medium cooling subsystem when the outlet temperature of the condenser is greater than the corresponding upper temperature limit. The medium is cooled by the condenser, so that the medium can be kept in a liquid state, and the recycling of the medium is realized. The upper temperature limit can be calibrated and determined according to a specific system, and the medium is determined to be liquid. There are a variety of ways to determine that the medium is in a liquid state. For example, it may be determined whether the medium is in a liquid state by a pressure difference by providing pressure sensors before and after the condenser.

According to the technical scheme, a first temperature difference between a waste heat inlet and a waste heat outlet of an evaporator in a heat source subsystem, a second temperature difference between a medium outlet and a medium inlet of the evaporator in a medium circulation subsystem and a third temperature difference between a medium inlet and a medium outlet of an expansion generator in the medium circulation subsystem are obtained; according to at least one of the first temperature difference, the second temperature difference and the third temperature difference, the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem are controlled, so that the problems of residual heat and medium flow control in the residual heat recovery control system during residual heat recovery are solved, and stable and reliable operation of the system is ensured while efficient residual heat recovery is realized.

Example two

Fig. 3 is a flowchart of a waste heat recovery control method according to a second embodiment of the present invention, where the method provided in the present embodiment may be applied to the waste heat recovery control system described above. The present embodiment is a further refinement of the foregoing technical solution, and the technical solution in this embodiment may be combined with each alternative solution in one or more embodiments described above. As shown in fig. 3, the method includes:

Step 210, acquiring a first temperature difference between a waste heat inlet and a waste heat outlet of an evaporator in the heat source subsystem, a second temperature difference between a medium outlet and a medium inlet of the evaporator in the medium circulation subsystem, and a third temperature difference between a medium inlet and a medium outlet of an expansion generator in the medium circulation subsystem.

And 220, controlling to reduce the medium flow in the medium circulation subsystem through the expansion generator when the third temperature difference is smaller than the corresponding third temperature difference lower limit value.

And 230, controlling to increase the medium flow flowing through the expansion generator in the medium circulation subsystem when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value.

That is, when the residual heat amount and the medium flow rate are controlled based on the temperature difference, the flow rate can be controlled directly based on the relationship between the temperature difference and the corresponding temperature difference limit value, without determining the operation state.

In an alternative implementation of the embodiment of the present invention, controlling the amount of heat remaining in the heat source subsystem flowing through the evaporator and the flow rate of medium in the medium circulation subsystem flowing through the expansion generator according to at least one of the first temperature difference, the second temperature difference, and the third temperature difference includes: when the third temperature difference is smaller than the corresponding third temperature difference lower limit value and the second temperature difference is larger than the corresponding second temperature difference upper limit value, controlling to reduce the residual heat flowing through the evaporator in the heat source subsystem; and when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value and the second temperature difference is larger than the corresponding second temperature difference upper limit value, controlling to increase the medium flow flowing through the expansion generator in the medium circulation subsystem.

In an alternative implementation of the embodiment of the present invention, controlling the amount of heat remaining in the heat source subsystem flowing through the evaporator and the flow rate of medium in the medium circulation subsystem flowing through the expansion generator according to at least one of the first temperature difference, the second temperature difference, and the third temperature difference includes: when the third temperature difference is smaller than the corresponding third temperature difference lower limit value and the first temperature difference is larger than the corresponding first temperature difference upper limit value, controlling to reduce the medium flow flowing through the expansion generator in the medium circulation subsystem; and controlling to increase the residual heat flowing through the evaporator in the heat source subsystem when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value and the first temperature difference is larger than the corresponding first temperature difference upper limit value.

Fig. 4 is a flowchart of a waste heat recovery control method according To a second embodiment of the present invention, as shown in fig. 4, in the waste heat recovery control provided by the embodiment of the present invention, it may be determined whether Δto2 is lower than a third temperature difference lower limit value, and if it is lower than the third temperature difference lower limit value, it is indicated that the expansion generator under the current working condition is at the maximum load. To protect the expansion generator, the flow of medium into the expansion generator may be reduced. Otherwise, the medium flow of the expansion generator can be increased, and the waste heat recovery power is increased. And secondly judging whether delta To1 is larger than the second upper temperature difference limit. If Δto1 is greater than the second upper temperature difference limit and the expander generator load is now being reduced, the exhaust inflow To the evaporator is reduced and the heat source injection is reduced. If deltaTo1 is greater than the second upper temperature difference limit and is not in the state of reducing the load of the expansion generator, the medium flow of the whole system can be increased, and more tail gas heat is absorbed. After that, Δte1 is judged. If the expansion generator load is now being reduced and Δte1 is greater than the first upper temperature difference limit, indicating that the current medium flow is excessive, the system medium supply may be reduced by reducing the medium pump speed. If the expansion generator load is currently increasing and Δte1 is greater than the first upper temperature difference limit, indicating that the current heat source is insufficient, the system exhaust inflow may be increased. Through the above measures, the expansion generator can be ensured to work at the maximum load all the time, and the maximum waste heat recovery is ensured.

On the basis of the above embodiment, alternatively, the cooling water supply amount of the condenser in the medium cooling subsystem may be controlled to be increased when the condenser outlet temperature is greater than the corresponding upper temperature limit.

Alternatively, a pressure sensor may be provided at the waste heat inlet of the expansion generator, based on the above embodiments. The flow of medium through the expansion generator can be further controlled by means of a pressure sensor. When the pressure of the medium is lower than the lower limit, controlling to increase the flow of the medium; when the medium pressure is higher than the upper limit, the control increases the medium flow rate. Temperature sensors may be provided at the waste heat inlet and waste heat outlet of the expansion generator. The medium flow and the waste heat quantity flowing through the expansion generator can be further controlled through the temperature sensor. Specifically, the temperature of the temperature sensor of the waste heat inlet of the expansion generator needs to be controlled within a preset range, so that damage to the expansion generator is avoided.

According to the technical scheme, the first temperature difference between the waste heat inlet and the waste heat outlet of the evaporator in the heat source subsystem, the second temperature difference between the medium outlet and the medium inlet of the evaporator in the medium circulation subsystem and the third temperature difference between the medium inlet and the medium outlet of the expansion generator in the medium circulation subsystem are obtained; when the third temperature difference is smaller than the corresponding third temperature difference lower limit value, controlling to reduce the medium flow flowing through the expansion generator in the medium circulation subsystem; when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value, the medium flow flowing through the expansion generator in the medium circulation subsystem is controlled to be increased, so that the problems of controlling the residual heat and the medium flow in the residual heat recovery control system are solved when the residual heat is recovered, and the stable and reliable operation of the system is ensured while the efficient residual heat recovery is realized.

Example III

Fig. 5 is a schematic structural diagram of a waste heat recovery control system according to a third embodiment of the present invention, where, as shown in fig. 5, the waste heat recovery control system includes: a heat source subsystem 100 and a medium circulation subsystem 200; wherein: the heat source subsystem 100 is connected to the medium circulation subsystem 200 through an evaporator 111.

The heat source subsystem is used for acquiring a waste heat source and controlling the waste heat flow of the evaporator; and the medium circulation subsystem is used for controlling the medium flow in the waste heat recovery control system and the medium flow flowing through the expansion generator in the medium circulation subsystem.

The heat source subsystem is also used for monitoring a first temperature difference between the waste heat inlet and the waste heat outlet of the evaporator and transmitting the first temperature difference to the system controller; the medium circulation subsystem is also used for monitoring a second temperature difference between a medium outlet and a medium inlet of the evaporator and a third temperature difference between the medium inlet and the medium outlet of the expansion generator, and transmitting the second temperature difference and the third temperature difference to the system controller.

The heat source subsystem is also used for acquiring the residual heat of the evaporator determined by the system controller according to at least one of the first temperature difference, the second temperature difference and the third temperature difference, and adjusting the residual heat flowing through the evaporator in the heat source subsystem according to the residual heat of the evaporator; the medium circulation subsystem is further used for acquiring the medium flow of the expansion generator determined by the system controller according to at least one of the first temperature difference, the second temperature difference and the third temperature difference, and adjusting the medium flow flowing through the expansion generator in the medium circulation subsystem according to the medium flow of the expansion generator.

As shown in fig. 5, for better control of the waste heat recovery control system, a temperature sensor and a pressure sensor may be optionally provided in the waste heat recovery system. In order to realize the recycling of the medium, a medium cooling subsystem 300 can be arranged in the waste heat recovery system; the medium circulation subsystem 200 is connected with the medium cooling subsystem 300; the medium cooling subsystem 300 is used for cooling the medium after working in the medium circulation subsystem 200. The medium cooling subsystem 300 is further configured to monitor a condenser outlet temperature in the medium cooling subsystem 300 and transmit the condenser outlet temperature to the system controller; and acquiring a cooling water supply quantity increasing instruction determined by the system controller according to the outlet temperature of the condenser and the corresponding upper temperature limit, and increasing the cooling water supply quantity of the condenser in the medium cooling subsystem according to the cooling water supply quantity increasing instruction.

For better implementation of the waste heat recovery control, a specific structure of the waste heat recovery control system is shown in fig. 5. As shown in fig. 5, the amount of exhaust heat, i.e., the waste heat, generated by the engine can be controlled by controlling the opening of the regulating valves eve_1 and eve_2. The temperature sensor tse_1 and the pressure sensor pse_1 can respectively perform signal acquisition on the temperature and the pressure of the engine exhaust, and can calculate the flow of the engine exhaust, thereby determining the maximum target recovered heat. The temperature sensor tse_2 and the temperature sensor tse_3 are respectively provided at the waste heat inlet and the waste heat outlet of the evaporator, and the first temperature difference Δte1 can be determined by the temperature sensor tse_2 and the temperature sensor tse_3. If Δte1 is smaller than the lower limit of the first temperature difference, it is considered that the exhaust gas waste heat of the current flow is not completely recovered, and if Δte1 is larger than the upper limit of the first temperature difference, it is considered that the exhaust gas waste heat of the current flow is completely recovered, and the flow rate of the exhaust gas flowing through the evaporator should be increased by adjusting the opening degrees of eve_1 and eve_2. Pressure sensors PSE_2 and PSE_3 can be respectively arranged at the waste heat inlet and the waste heat outlet of the evaporator and used for assisting in waste heat judgment.

As shown in fig. 5, the medium may be stored in a medium liquid storage tank, and pumped out of the medium liquid storage tank by an electronically controlled Pump pump_1, and then enter the evaporator after passing through a flowmeter fso_1 and a regenerator. A temperature sensor tso_1 and a pressure sensor pso_1 may be provided at the medium outlet of the medium reservoir to monitor the medium output. Temperature sensors tso_2 and tso_3 may be provided at the medium inlet and medium outlet of the evaporator, respectively. The temperature difference between the medium outlet and the medium inlet is deltato 1, and when deltato 1 is larger than the upper limit of the second temperature difference, the current medium flow is insufficient, and the medium flow needs To be increased or the flow of the tail gas flowing through the evaporator needs To be reduced. When tso—3 temperature is above the corresponding upper limit, indicating that the current medium flow is insufficient, it is necessary to increase the medium flow or decrease the exhaust flow through the evaporator. The medium inlet and the medium outlet of the evaporator can be respectively provided with a pressure sensor PSO_2 and a pressure sensor PSO_3, and the pressure sensor can assist in medium detection so as to ensure that the medium flowing through the evaporator is in a gaseous state.

As shown in fig. 5, the medium reaches the expansion generator through the electronically controlled valve evo_2, converting thermal energy into electrical energy. The electronically controlled valves evo_2 and evo_3 together control the flow and pressure of the medium through the expansion generator. The opening degree of the electronic control valve evo_3 is decreased when the medium pressure (pressure sensor pso_3) is lower than the lower limit, and the opening degree of the electronic control valve evo_3 is increased when the medium pressure is greater than the upper limit.

As shown in fig. 5, the medium inlet and the medium outlet of the expansion generator are respectively provided with a temperature sensor tso_4 and a temperature sensor tso_5, and the pressure sensors pso_4 and pso_5, wherein the temperature difference between the medium inlet and the medium outlet is Δto2, and when Δto2 is smaller than the lower limit value of the third temperature difference, the current working condition is considered To be the upper limit of energy conversion of the expansion generator. The temperature and the pressure of the inlet of the expansion machine need to be monitored in real time, and when the temperature is lower than the corresponding lower limit, the medium can be in a liquid state, so that the expansion machine can be damaged; when the temperature exceeds the corresponding upper limit, the expansion generator may also be damaged.

As shown in fig. 5, the medium after acting flows through the regenerator to preheat the medium at the outlet of the medium liquid storage tank, so that the efficiency of recovering the waste heat of the system can be further improved. Temperature sensors tso_6 and tso_7 may be provided at the medium inlet and outlet, respectively, after work of the regenerator. The medium passing through the heat regenerator is changed into liquid state after passing through the condenser and flows into the liquid storage tank, and when the temperature of the medium outlet temperature sensor TSO_8 of the condenser exceeds the upper limit, the flow of cooling water needs to be increased, so that the medium is ensured to be in the liquid state. The condenser medium outlet may also be provided with a pressure sensor pso_8. The electrically controlled valve evw_1 can adjust the amount of cooling water in the condenser. The flow meter fsw_1 can monitor the amount of cooling water. Temperature sensors tsw_1 and tsw_2 may be provided at the cooling water inlet and outlet of the condenser, respectively.

On the basis of the above embodiment, optionally, the medium circulation subsystem is specifically configured to obtain, when the third temperature difference is smaller than the corresponding third temperature difference lower limit value, the determined control to reduce the medium flow flowing through the expansion generator in the medium circulation subsystem; or when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value, the determined control increases the medium flow flowing through the expansion generator in the medium circulation subsystem; the flow of the medium through the expansion generator in the medium circulation subsystem is regulated in accordance with the flow of the medium.

On the basis of the above embodiment, optionally, the heat source subsystem is further specifically configured to obtain, when the third temperature difference is smaller than the corresponding third temperature difference lower limit value and the second temperature difference is greater than the corresponding second temperature difference upper limit value, the determined control to reduce the residual heat flowing through the evaporator in the heat source subsystem; and the residual heat quantity flowing through the evaporator in the heat source subsystem is regulated according to the residual heat quantity.

The medium circulation subsystem is further specifically configured to obtain, when the third temperature difference is not less than the corresponding third temperature difference lower limit value and the second temperature difference is greater than the corresponding second temperature difference upper limit value, determine to control to increase the medium flow flowing through the expansion generator in the medium circulation subsystem; and adjusting the flow of medium through the expansion generator in the medium circulation subsystem according to the expansion generator medium flow.

On the basis of the above embodiment, optionally, the medium circulation subsystem is further specifically configured to obtain, when the third temperature difference is smaller than the corresponding third temperature difference lower limit value and the first temperature difference is greater than the corresponding first temperature difference upper limit value, control to reduce the medium flow flowing through the expansion generator in the medium circulation subsystem; and adjusting the flow of medium through the expansion generator in the medium circulation subsystem according to the expansion generator medium flow.

The heat source subsystem is also specifically used for acquiring that the system controller is not smaller than the corresponding lower limit value of the third temperature difference, and the first temperature difference is larger than the corresponding upper limit value of the first temperature difference, and the determined control increases the residual heat quantity flowing through the evaporator in the heat source subsystem; and regulating the residual heat quantity flowing through the evaporator in the heat source subsystem according to the residual heat quantity.

On the basis of the above embodiment, the heat source subsystem is optional, and is specifically further configured to obtain, according to the operation condition, the residual heat flowing through the evaporator in the heat source subsystem determined by the system controller, and adjust the residual heat flowing through the evaporator in the heat source subsystem according to the residual heat.

The medium circulation subsystem is also specifically used for acquiring the medium flow which flows through the expansion generator in the medium circulation subsystem and is determined by the system controller according to the operation condition, and regulating the medium flow which flows through the expansion generator in the medium circulation subsystem according to the medium flow of the expansion generator.

The operation condition is determined by the following modes: and the system controller determines the operation condition of the waste heat recovery control system according to at least one of the first temperature difference, the second temperature difference and the third temperature difference.

The waste heat recovery control system provided by the embodiment of the invention can execute the waste heat recovery control method provided by any embodiment of the invention, and can realize the same or similar technical effects as those of executing the waste heat recovery control method.

Example IV

Fig. 6 is a schematic structural diagram of a waste heat recovery control device according to a fourth embodiment of the present invention. The device is applied to waste heat recovery control system, and the system includes: a heat source subsystem and a medium circulation subsystem; the heat source subsystem is connected with the medium circulation subsystem through an evaporator; the heat source subsystem is used for acquiring a waste heat source and controlling the waste heat flow of the evaporator; and the medium circulation subsystem is used for controlling the medium flow in the waste heat recovery control system and the medium flow flowing through the expansion generator in the medium circulation subsystem. As shown in fig. 6, the apparatus includes:

A temperature difference obtaining module 610, configured to obtain a first temperature difference between a waste heat inlet and a waste heat outlet of an evaporator in the heat source subsystem, a second temperature difference between a medium outlet and a medium inlet of the evaporator in the medium circulation subsystem, and a third temperature difference between a medium inlet and a medium outlet of an expansion generator in the medium circulation subsystem;

the flow control module 620 is configured to control the amount of heat remaining in the heat source subsystem through the evaporator and the amount of medium flowing in the medium circulation subsystem through the expansion generator according to at least one of the first temperature difference, the second temperature difference, and the third temperature difference.

Optionally, the flow control module 620 includes:

The first medium flow control unit is used for controlling and reducing the medium flow flowing through the expansion generator in the medium circulation subsystem when the third temperature difference is smaller than the corresponding third temperature difference lower limit value;

And the second medium flow control unit is used for controlling and increasing the medium flow flowing through the expansion generator in the medium circulation subsystem when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value.

Optionally, the flow control module 620 includes:

the first waste heat quantity control unit is used for controlling and reducing the waste heat quantity flowing through the evaporator in the heat source subsystem when the third temperature difference is smaller than the corresponding third temperature difference lower limit value and the second temperature difference is larger than the corresponding second temperature difference upper limit value;

And the third medium flow control unit is used for controlling and increasing the medium flow flowing through the expansion generator in the medium circulation subsystem when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value and the second temperature difference is larger than the corresponding second temperature difference upper limit value.

Optionally, the flow control module 620 includes:

A fourth medium flow control unit, configured to control and reduce the medium flow flowing through the expansion generator in the medium circulation subsystem when the third temperature difference is smaller than the corresponding third temperature difference lower limit value and the first temperature difference is larger than the corresponding first temperature difference upper limit value;

And the second waste heat quantity control unit is used for controlling and increasing the waste heat quantity flowing through the evaporator in the heat source subsystem when the third temperature difference is not smaller than the corresponding third temperature difference lower limit value and the first temperature difference is larger than the corresponding first temperature difference upper limit value.

Optionally, the waste heat recovery control system further includes: a media cooling subsystem; the medium circulation subsystem is connected with the medium cooling subsystem; and the medium cooling subsystem is used for cooling the medium after acting in the medium circulation subsystem.

The device further comprises:

and the cooling water supply quantity control module is used for acquiring the outlet temperature of the condenser in the medium cooling subsystem and controlling to increase the cooling water supply quantity of the condenser in the medium cooling subsystem when the outlet temperature of the condenser is greater than the corresponding upper temperature limit.

Optionally, the flow control module 620 includes:

the operation condition determining unit is used for determining the operation condition of the waste heat recovery control system according to at least one of the first temperature difference, the second temperature difference and the third temperature difference;

And the flow control unit is used for controlling the residual heat flowing through the evaporator in the heat source subsystem and the medium flow flowing through the expansion generator in the medium circulation subsystem according to the operation condition.

The waste heat recovery control device provided by the embodiment of the invention can execute the waste heat recovery control method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

Example five

Fig. 7 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 7, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.

Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.

The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as a waste heat recovery control method.

In some embodiments, the waste heat recovery control method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the waste heat recovery control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the waste heat recovery control method in any other suitable manner (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A waste heat recovery control method, wherein the method is applied to a waste heat recovery control system, the system comprising: a heat source subsystem and a medium circulation subsystem; wherein the heat source subsystem is connected with the medium circulation subsystem through an evaporator; the heat source subsystem is used for acquiring a waste heat source and controlling the flow of waste heat flowing through the evaporator; the medium circulation subsystem is used for controlling the medium flow in the waste heat recovery control system and the medium flow flowing through the expansion generator in the medium circulation subsystem; the method comprises the following steps:

2. The method of claim 1, wherein controlling the amount of heat remaining in the heat source subsystem through the evaporator and the flow of medium in the medium circulation subsystem through the expansion generator based on at least one of the first temperature differential, the second temperature differential, and the third temperature differential comprises:

3. The method of claim 2, wherein controlling the amount of heat remaining in the heat source subsystem through the evaporator and the flow of medium in the medium circulation subsystem through the expansion generator based on at least one of the first temperature differential, the second temperature differential, and the third temperature differential comprises:

4. The method of claim 2, wherein controlling the amount of heat remaining in the heat source subsystem through the evaporator and the flow of medium in the medium circulation subsystem through the expansion generator based on at least one of the first temperature differential, the second temperature differential, and the third temperature differential comprises:

5. The method of claim 1, wherein the waste heat recovery control system further comprises: a media cooling subsystem; the medium circulation subsystem is connected with the medium cooling subsystem; the medium cooling subsystem is used for cooling the medium after acting in the medium circulation subsystem; the method further comprises the steps of:

6. The method of claim 1, wherein controlling the amount of heat remaining in the heat source subsystem through the evaporator and the flow of medium in the medium circulation subsystem through the expansion generator based on at least one of the first temperature differential, the second temperature differential, and the third temperature differential comprises:

7. A waste heat recovery control system, the system comprising: a heat source subsystem and a medium circulation subsystem; wherein:

8. A waste heat recovery control device, wherein the device is applied to a waste heat recovery control system, the system comprising: a heat source subsystem and a medium circulation subsystem; wherein the heat source subsystem is connected with the medium circulation subsystem through an evaporator; the heat source subsystem is used for acquiring a waste heat source and controlling the flow of waste heat flowing through the evaporator; the medium circulation subsystem is used for controlling the medium flow in the waste heat recovery control system and the medium flow flowing through the expansion generator in the medium circulation subsystem; the device comprises:

9. An electronic device, the electronic device comprising:

At least one processor; and

A memory communicatively coupled to the at least one processor; wherein,

The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the waste heat recovery control method of any one of claims 1-6.

10. A computer readable storage medium storing computer instructions for causing a processor to implement the waste heat recovery control method of any one of claims 1-6 when executed.