An organic Rankine cycle waste heat recovery system on a truck

Abstract

The present invention provides an organic Rankine cycle waste heat recovery system on a truck, which relates to the field of metal processing technology. The scheme adopted is: including an unwinder, a leveler, a first cutting device, a conveying device, a high-temperature heating furnace, a punching machine and a second cutting device arranged in sequence along the feeding direction, a first manipulator is provided at the feed port of the high-temperature heating furnace, a second manipulator is provided at the discharge port of the high-temperature heating furnace, and the punching machine and the second cutting device are both located within the grasping range of the second manipulator. The effect brought by the present invention is: the cutting and stamping hot forming of parts are integrated into a production line, and continuous operation is achieved through reasonable layout, and finished product forming can be achieved in a production line, without wasting manpower in the middle, eliminating the transportation in the middle, and avoiding damage to the surface of the sheet.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to an organic Rankine cycle waste heat recovery system on a truck. Background Art

[0002] Trucks play an irreplaceable role in the modern transportation industry and are also the main source of CO2 emissions in the transportation industry. With the increasing severity of the energy crisis and environmental problems, energy conservation and emission reduction of trucks have received more and more attention. The internal combustion engine is the driving force of the truck, but its efficiency is only about 40%. A large amount of heat is carried away by flue gas, cylinder jacket water and pressurized air. Its energy conservation and emission reduction are of great significance to alleviating energy and environmental problems. The internal combustion engine waste heat recovery technology based on the Rankine cycle is considered to be one of the key off-cylinder technical means to improve the total energy efficiency of the internal combustion engine. It recovers the waste heat of the internal combustion engine and converts it into useful work.

[0003] The invention patent with patent number CN111441837B discloses an internal combustion engine waste heat recovery device and its recovery method, wherein the waste heat recovery device includes: an internal combustion engine cylinder block, a flue gas heat exchanger, an expander, a boost air preheater, a high temperature regenerator, a low temperature regenerator, a cooling unit, a boost unit and a working fluid tank, and the internal combustion engine waste heat recovery device uses supercritical / subcritical CO2 as a circulating working fluid. The present invention utilizes supercritical / subcritical CO2 to fully recover the waste heat of various heat sources of different qualities in the internal combustion engine, such as flue gas, cylinder jacket water and boost air. It has a simple structure and uses a good circulating medium with good economy, which can effectively improve the waste heat recovery efficiency. However, it still has the following disadvantages: the invention does not propose a layout method in the truck field and the ability to combine with production; the invention has a large volume structure and does not meet the requirements of integrated layout on trucks.

[0004] The invention patent with patent number CN105189943B discloses a method and device for heating an expansion machine of a waste heat recovery device, a waste heat recovery device used with an internal combustion engine, which includes: a working fluid circuit for circulating a working fluid, a boiler connected to the working fluid circuit and suitable for recovering waste heat from a heat source to heat the working fluid, an expander connected to the working fluid circuit to receive the working fluid from the boiler, and a heating jacket associated with the expander. The working fluid circuit located downstream of the boiler includes a first branch connected to the inlet of the expander and a second branch connected to the heating jacket. A valve is connected to the working fluid circuit to selectively control whether the working fluid flows to the first branch to expand and recover work or to the second branch to heat the expander in response to the temperature of the working fluid. The invention has the following defects: the expansion machine of the invention is large in size and weight, and it is difficult to install on the whole vehicle; the invention does not consider the protection mechanism of the heat exchanger outlet, and does not propose an intake air reflux control scheme.

[0005] The invention patent with the patent number US20220010715A1 discloses a waste heat recovery device for vehicles, which includes: a housing with a first exhaust channel and a second exhaust channel, an exhaust inlet fitting and an exhaust outlet fitting; a heat exchanger arranged in the first exhaust channel; and a switching valve with a sliding door, which can move in the longitudinal direction of the housing to allow the exhaust gas flow to switch between the first exhaust channel and the second exhaust channel, wherein the first exhaust channel is parallel to the second exhaust channel, and the sliding door can move between the first exhaust channel and the second exhaust channel. The invention has the following defects: the invention structure is provided with a sliding door, the structure is complex and integral, and it is difficult to install; the invention does not consider the compatibility with the current mainstream truck vehicle structure in the industry, and cannot achieve the effective integration of the waste heat recovery system and the existing trucks.

[0006] In short, since the spatial layout of the truck itself is complex and compact, high requirements are placed on the integrated layout of the waste heat recovery system and the truck. Summary of the invention

[0007] The purpose of the present invention is to propose and design an organic Rankine cycle waste heat recovery system on a truck in view of the problem that the spatial layout of the truck itself is very complex and compact and it is difficult to effectively integrate the waste heat recovery system and the truck in the prior art.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: an organic Rankine cycle waste heat recovery system on a truck, comprising an internal combustion engine, a cylinder jacket water preheater, a flue gas heat exchanger, a condenser, a pump, a liquid storage tank and an expander, the internal combustion engine is connected to a cylinder jacket water cylinder external pipeline, the hot fluid side of the cylinder jacket water preheater is connected to the cylinder jacket water cylinder external pipeline, the cold fluid side inlet of the cylinder jacket water preheater is connected to the pump, the cold fluid side outlet of the cylinder jacket water preheater is connected to the cold fluid side inlet of the flue gas heat exchanger, the hot fluid inlet of the flue gas heat exchanger is connected to the flue gas pipeline of the internal combustion engine, the cold fluid side outlet of the flue gas heat exchanger is connected to the expander, the expander is connected to the condenser, the condenser is connected to the liquid storage tank, and the liquid storage tank is connected to the pump to form a waste heat recovery system, which makes full use of the cylinder jacket water cylinder external pipeline and the flue gas pipeline structure of the internal combustion engine, arranges the cylinder jacket water preheater on the basis thereof, and modularizes the waste heat recovery device to make the waste heat recovery system easier to arrange on the truck.

[0009] Furthermore, the outer pipe of the cylinder jacket water is the original outer pipe of the internal combustion engine cooling water. That is, the outer pipe direction of the original cylinder jacket water is not changed, and it is used as a heat source to heat the working fluid of the waste heat recovery system, making full use of the original water outlet pipe of the internal combustion engine, so as to add and integrate the system on the original basis.

[0010] Furthermore, the flue gas pipeline is the original exhaust pipeline of the internal combustion engine flue gas. After the working fluid is heated by the cylinder jacket water, it flows into the flue gas heat exchanger and is further heated and evaporated by the flue gas. The flue gas heat exchanger is arranged on the original exhaust pipeline of the internal combustion engine flue gas, and the direction of the original exhaust pipeline is not changed. The original exhaust pipeline of the internal combustion engine is fully utilized, so as to add the integrated system on the original basis.

[0011] Furthermore, with the longitudinal axis of the truck as the centerline, the expander and flue gas heat exchanger are arranged on one side of the centerline, and the condenser, liquid storage tank and pump are arranged on the other side of the centerline. By reasonably setting the position and layout, the occupied space of the system is reduced, and modular decomposition is performed, so that the waste heat recovery system is easier to arrange on the complex and compact body of the truck, achieving a higher level of integration.

[0012] Furthermore, a cooling fan is installed inside the condenser to provide sufficient cooling air for the condenser.

[0013] Furthermore, the condenser is arranged close to the outside of the truck body and there is no shielding in front of the condenser, and is located at a more outer position relative to the liquid storage tank and the pump, that is, at the outer edge of the truck body. There is no shielding in front of the condenser to facilitate the introduction of cooling air to fully cool the working medium.

[0014] Furthermore, the working fluid in the flue gas heat exchanger can enter the expander to expand and do work, and the expanded working fluid enters the condenser to be condensed into liquid.

[0015] Furthermore, the cooled working fluid flows into the liquid storage tank and is pumped out by the pump and transported to the cylinder jacket water preheater again.

[0016] It can be seen from the above technical solutions that the present invention has the following advantages:

[0017] This solution provides an organic Rankine cycle waste heat recovery system on a truck, which realizes the effective integration of the waste heat recovery system and the truck, makes full use of the existing structures such as the cylinder liner water cylinder external pipeline and the exhaust pipeline of the internal combustion engine, arranges the cylinder liner water preheater on its basis, and modularizes the waste heat recovery device to make the waste heat recovery system easier to arrange on the truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0020] In the figure, 1. pump, 2. jacket water preheater, 3. flue gas heat exchanger, 4. expander, 5. condenser, 6. liquid storage tank, 7. jacket water cylinder external pipeline, 8. flue gas pipeline. DETAILED DESCRIPTION

[0021] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0022] like Figure 1 As shown, this specific embodiment provides an organic Rankine cycle waste heat recovery system on a truck, and a cylinder jacket water preheater 2 is arranged on the original water outlet pipeline outside the cylinder of the internal combustion engine cooling water, and its hot fluid side is connected to the cylinder jacket water cylinder outer pipeline 7, and the cold fluid side is the working fluid at the outlet of the pump 1 of the waste heat recovery system. After the cylinder jacket water heats the working fluid here, it continues to flow back to the original cylinder jacket water cylinder outer pipeline 7. The cold fluid side outlet of the cylinder jacket water preheater 2 is connected to the cold fluid side inlet of the flue gas heat exchanger 3, and the flue gas heat exchanger 3 is arranged on the original flue gas pipeline 8 of the internal combustion engine flue gas. The flue gas is connected to the hot fluid inlet of the flue gas heat exchanger 3 as a heat source, and flows out after heating the working fluid here, and continues to flow into the original internal combustion engine exhaust pipe. The cold fluid side outlet of the flue gas heat exchanger 3 is connected to the expander 4, where the working fluid expands and does work, and the expander 4 is arranged on the same side of the flue gas heat exchanger 3 with the longitudinal axis of the truck as the center line. An air-cooled condenser 5 is connected to the back of the expander 4, and the expanded working fluid enters the condenser 5 and is condensed into liquid. The condenser 5 is arranged on the other side of the truck (different from the expander 4 and the flue gas heat exchanger 3) and is the outermost side. There needs to be no shielding in front of the condenser 5 to facilitate the introduction of cooling air to fully cool the working fluid. A cooling fan is installed on the inside of the condenser 5 to provide sufficient cooling air for the condenser 5. A liquid storage tank 6 is connected to the working fluid outlet of the condenser 5, and a working fluid pump 1 is connected to the back of the liquid storage tank 6. The working fluid is pumped out of the liquid storage tank 6 by the pump 1 and pressurized, and then transported again to the cylinder jacket water preheater 2 arranged on the original water outlet pipeline outside the cylinder of the internal combustion engine cooling water.

[0023] The terms "upper", "lower", "outer side", "inner side" and the like (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position without giving qualitative description. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0024] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An organic Rankine cycle waste heat recovery system on a truck, comprising an internal combustion engine, a cylinder jacket water preheater, a flue gas heat exchanger, a condenser, a pump, a liquid storage tank and an expander, wherein the internal combustion engine is connected to a cylinder jacket water cylinder external pipeline, characterized in that: The hot fluid side of the cylinder jacket water preheater is connected to the cylinder jacket water cylinder external pipeline, the cold fluid side inlet of the cylinder jacket water preheater is connected to the pump, the cold fluid side outlet of the cylinder jacket water preheater is connected to the cold fluid side inlet of the flue gas heat exchanger, the hot fluid inlet of the flue gas heat exchanger is connected to the flue gas pipeline of the internal combustion engine, the cold fluid side outlet of the flue gas heat exchanger is connected to the expander, the expander is connected to the condenser, the condenser is connected to the liquid storage tank, the liquid storage tank is connected to the pump, the cylinder jacket water cylinder external pipeline is the original water outlet pipeline outside the cylinder of the internal combustion engine cooling water, and the flue gas pipeline is the original exhaust pipeline of the internal combustion engine flue gas.

2. The organic Rankine cycle waste heat recovery system on a truck as claimed in claim 1, characterized in that: With the longitudinal axis of the truck as the centerline, the expander and the flue gas heat exchanger are arranged on one side of the centerline, and the condenser, the liquid storage tank and the pump are arranged on the other side of the centerline.

3. The organic Rankine cycle waste heat recovery system on a truck as claimed in claim 2, characterized in that: A cooling fan is installed inside the condenser.

4. The organic Rankine cycle waste heat recovery system on a truck as claimed in claim 3, characterized in that: The condenser is arranged close to the outside of the truck body and there is no shielding in front of the condenser.

5. The organic Rankine cycle waste heat recovery system on a truck as claimed in claim 1, characterized in that: The working fluid in the flue gas heat exchanger can enter the expander to expand and do work, and the expanded working fluid enters the condenser to be condensed into liquid.

6. The organic Rankine cycle waste heat recovery system on a truck as claimed in claim 5, characterized in that: The cooled working fluid flows into the liquid storage tank and is pumped out by the pump and transported to the cylinder jacket water preheater again.

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