CN210460892U - Heat management and heat recovery coupling system for cylinder sleeve of internal combustion engine - Google Patents

Heat management and heat recovery coupling system for cylinder sleeve of internal combustion engine Download PDF

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Publication number
CN210460892U
CN210460892U CN201920819373.XU CN201920819373U CN210460892U CN 210460892 U CN210460892 U CN 210460892U CN 201920819373 U CN201920819373 U CN 201920819373U CN 210460892 U CN210460892 U CN 210460892U
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combustion engine
internal combustion
heat
working medium
heat recovery
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石凌峰
舒歌群
田华
王轩
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University of Science and Technology of China USTC
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University of Science and Technology of China USTC
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

The utility model discloses an internal-combustion engine cylinder liner heat management and heat recovery coupled system, including the coupling together constitute circulation circuit's internal-combustion engine waste heat recovery system and heat management system through the pipeline, the circulation circuit internal flow has the cycle medium. The utility model discloses a direct coupling of circulation system internal-combustion engine waste heat recovery system and thermal management system will be used for waste heat recovery's cycle working medium to accomplish the cylinder liner heat recovery process when accomplishing internal-combustion engine cylinder body cooling process as the cylinder liner coolant simultaneously, and system's part has been reduced, has improved heat recovery utilization ratio, and has made the internal-combustion engine cylinder liner realize the heat management.

Description

Heat management and heat recovery coupling system for cylinder sleeve of internal combustion engine
Technical Field
The utility model relates to an energy utilization and conversion technical field, in particular to internal-combustion engine cylinder liner heat management and heat recovery coupled system.
Background
In order to avoid high temperature damage to engine parts, a cooling system is adopted to reduce the temperature of a cylinder sleeve of the internal combustion engine at present, the cooling system takes away a part of heat energy generated by fuel combustion, the exhaust gas discharged by the internal combustion engine also takes away a part of heat energy, and more than 50% of fuel combustion energy is lost in the forms of cylinder sleeve water and exhaust gas. The temperature of the cylinder sleeve has great influence on the combustion process of the internal combustion engine, and when the cylinder sleeve is at a proper working temperature, the combustion process of the internal combustion engine can be stably carried out, so that the efficiency of the internal combustion engine is improved, and the emission is reduced. Meanwhile, the existing waste heat recovery system and the existing heat management system have many components and occupy a large space.
Therefore, how to provide a thermal management and heat recovery coupling system for a cylinder sleeve of an internal combustion engine, which reduces system components, improves the heat recovery utilization rate, and enables the cylinder sleeve of the internal combustion engine to realize efficient thermal management becomes a technical problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an internal-combustion engine cylinder liner heat management and heat recovery coupled system has reduced system's part, improves heat recovery utilization ratio, and makes the internal-combustion engine cylinder liner realize high-efficient heat management.
In order to achieve the above object, the utility model provides a following technical scheme:
a heat management and heat recovery coupling system for a cylinder sleeve of an internal combustion engine comprises an internal combustion engine waste heat recovery system and a heat management system which are coupled together and form a circulation loop through a pipeline, and a circulation working medium flows in the circulation loop.
Preferably, the circulation loop comprises a working medium pump, a heat regenerator, an internal combustion engine cylinder sleeve cooling structure, a gas heater, an expander and a condenser which are sequentially communicated, a rotating shaft of the expander is connected with a rotating shaft of the generator, and the circulating working medium is CO2Mixtures with organic working substances.
Preferably, the internal combustion engine cylinder sleeve cooling structure is a cooling chamber arranged on the internal combustion engine cylinder sleeve, the inlet end of the cooling chamber is connected with the hot end outlet of the heat regenerator, and the outlet end of the cooling chamber is connected with the working medium inlet of the gas heater.
Preferably, the heat source of the gas heater is exhaust gas from an internal combustion engine.
Preferably, the heat source of the heat regenerator is a cycle fluid discharged by the expander.
Preferably, the circulating working medium in the circulating loop is CO2And propane.
Preferably, the circulating working medium in the circulating loop is CO2With n-butane.
Preferably, the circulating working medium in the circulating loop is CO2With trifluorodichloroethane.
Preferably, the circulating working medium at the outlet of the working medium pump is in a supercritical state.
According to the above technical scheme, the utility model provides a pair of internal-combustion engine cylinder liner heat management and heat recovery coupled system, the utility model discloses a direct coupling of circulation system internal-combustion engine waste heat recovery system and heat management system will be used for waste heat recovery's cycle working medium to regard as the cylinder liner coolant simultaneously, accomplishes the cylinder liner heat recovery process when the internal-combustion engine cylinder body cooling process is accomplished to the cycle working medium, has reduced system's part, has improved heat recovery utilization ratio, and has made the internal-combustion engine cylinder liner realize the heat management.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a heat management and heat recovery coupling system for a cylinder liner of an internal combustion engine provided by an embodiment of the present invention.
1. The system comprises an internal combustion engine cylinder sleeve, 2, a gas heater, 3, an expander, 4, a generator, 5, a heat regenerator, 6, a condenser, 7, a working medium pump, A, a heat source, B and a cooling medium.
Detailed Description
The utility model discloses an internal-combustion engine cylinder liner heat management and heat recovery coupled system has reduced system's part, improves heat recovery utilization ratio, and makes the internal-combustion engine cylinder liner realize high-efficient heat management.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the utility model discloses a thermal management and heat recovery coupling system for a cylinder sleeve of an internal combustion engine, which comprises an internal combustion engine waste heat recovery system and a thermal management system which are coupled together and form a circulation loop through a pipeline, wherein a circulation working medium flows in the circulation loop.
The utility model discloses a circulation system has directly coupled internal-combustion engine waste heat recovery system and thermal management system, will be used for waste heat recovery's cycle working medium to accomplish the cylinder liner heat recovery process when accomplishing internal-combustion engine cylinder body cooling process as the cylinder liner coolant simultaneously, has reduced system's part, make full use of internal-combustion engine fuel's energy, improved heat recovery utilization ratio, and make internal-combustion engine cylinder liner 1 realize the thermal management.
Specifically, the circulation loop comprises a working medium pump 7, a heat regenerator 5, an internal combustion engine cylinder sleeve cooling structure, a gas heater 2, an expander 3 and a condenser 6 which are sequentially communicated, and a rotating shaft of the expander 3 is connected with a rotating shaft of the generator 4.
The working medium pump 7 is used for pressurizing and conveying the liquid working medium discharged from the condenser 6 to the heat regenerator 5, and the working medium is pressurized to a supercritical state.
The heat regenerator 5 heats the flowing supercritical working medium, so that the temperature of the supercritical working medium is increased, the temperature of the working medium at the cooling inlet of the cylinder sleeve 1 of the internal combustion engine is increased, the temperature of the working medium is close to the heat management requirement temperature of the cylinder sleeve 1 of the internal combustion engine, and the heat management requirement of the cylinder sleeve is met.
The gas heater 2 serves to increase the temperature and the work-producing capacity of the working medium flowing through it.
The working medium in a supercritical state enters the expansion machine 3, the expansion machine 3 is used for working under the drive of the high-pressure working medium, mechanical work is output outwards when the high-pressure working medium expands and reduces pressure, and the generator 4 connected with the expansion machine 3 converts the mechanical work into electric energy to be output.
The gaseous working medium flowing out of the expander 3 flows into the condenser 6, and in the condenser 6, the cooling medium B absorbs the heat of the gaseous working medium flowing through, and changes from a gaseous state to a liquid state.
The circulating working medium is CO2Mixtures with organic working substances. By CO2With mixtures of organic working substances as circulating working substances, CO2The proportion of the mixed circulating working medium and the organic working medium enables the critical area of the mixed circulating working medium to be matched with the heat management temperature area of the cylinder sleeve 1 of the internal combustion engine, thereby realizing the high-efficiency cooling and heat recovery of the cylinder sleeve. The mixture ratio of the mixed working medium must be such that the critical temperature is between the condensation temperature of the cylinder sleeve and the heat management temperature of the cylinder sleeve (the optimal working temperature of the cylinder sleeve).
In a specific embodiment, the condensation condition of the cylinder sleeve 1 of the internal combustion engine is 50 ℃, the thermal management temperature is 90 ℃, and the critical temperature of the mixed working medium is 70 ℃. When mixed working medium with the critical temperature of 70 ℃ is prepared, one working medium with the critical temperature lower than 70 ℃ is adopted to be mixed with the other working medium with the critical temperature higher than 70 ℃. Most of organic working medium has critical temperature higher than 70 deg.C, and CO2The critical temperature of (A) is about 31 ℃ and lower than 70 ℃. And CO2The critical condition of the system is easy to reach, the chemical property of the system is inactive, the system is colorless, tasteless and nontoxic, the safety is good, the price is low, the purity is high, and the system is easy to obtain, therefore, the utility model discloses a cycle fluid is CO2Mixed working medium formed by the organic working medium.
In a specific embodiment, the circulating working medium in the circulating loop is CO2The mixture ratio of the catalyst and propane is 0.45: 0.55. In other embodiments, the ratio may be close to this ratio.
In another embodiment, the cycle fluid in the circulation loop is a mixture of CO2 and n-butane, and the ratio of the mixture is 0.68: 0.32. In other embodiments, the ratio may be close to this ratio.
In a further embodiment, the circulating medium in the circulation loop is CO2The mixture of the active component and trifluorodichloroethane is 0.45: 0.55. In other embodiments, the ratio may be close to this ratio.
Further, the cooling structure of the cylinder sleeve of the internal combustion engine is a cooling chamber arranged on the cylinder sleeve of the internal combustion engine, the inlet end of the cooling chamber is connected with the hot end outlet of the heat regenerator 5, and the outlet end of the cooling chamber is connected with the working medium inlet of the gas heater 2. The mixed working medium flowing through the gas heater 2 is heated by the gas heater 2. The high-temperature high-pressure working medium obtained by heating the gas heater 2 improves the output power of the expander 3, ensures the reliable work of the expander 3 and improves the generated energy of the generator 4 connected with the expander 3. The heat source A of the gas heater 2 is the exhaust gas discharged from the cylinder liner 1 of the internal combustion engine. The waste gas discharged by the internal combustion engine cylinder sleeve 1 is adopted to heat the working medium flowing through the gas heater 2, so that the waste heat of the waste gas discharged by the internal combustion engine is recycled, and the heat utilization rate of energy is improved. It will be appreciated that in other embodiments, the heat source of the gas heater 2 may be other external heat sources.
In one embodiment, the heat source of regenerator 5 is the cycle fluid discharged from expander 3. Specifically, a cold end inlet of the heat regenerator 5 is communicated with an outlet of the expander 3, and a cold end outlet of the heat regenerator 5 is communicated with a working medium inlet of the condenser 6. The heat regenerator 5 is heated by the heat of the working medium flowing out of the expansion machine 3, so that the high-temperature waste heat of the system is recovered, and the heat utilization efficiency of the system is increased. The heat regenerator 5 raises the temperature of the supercritical working medium flowing to the cylinder sleeve 1 of the internal combustion engine, increases the temperature of the working medium at the cooling inlet of the cylinder sleeve 1 of the internal combustion engine, makes the temperature of the working medium close to the heat management requirement temperature of the cylinder sleeve 1 of the internal combustion engine, and adapts to the heat management requirement of the cylinder sleeve.
The working medium flowing through the cylinder sleeve 1 of the internal combustion engine is in a supercritical state, the working medium in the supercritical state has good heat exchange performance, good cooling effect on the cylinder sleeve and high cooling speed, so that the cylinder sleeve 1 of the internal combustion engine can be rapidly cooled to the optimal working temperature, and efficient heat management is realized.
All joints remain sealed throughout the circulation system.
A temperature sensor is arranged in the liquid storage tank, and signals are sent to an ECU for processing.
And an air pressure sensor and a temperature sensor are arranged at the inlet of the condenser 6 and the inlet of the internal combustion engine cylinder sleeve cooling structure, and signals of the air pressure sensor and the temperature sensor are transmitted to the ECU for processing.
The utility model discloses a thermal management of internal-combustion engine cylinder liner and heat recovery coupled system, circulation medium adopt transcritical form, and heat recovery circulation medium is regarded as the coolant of internal-combustion engine cylinder liner 1 simultaneously, through above setting, makes the energy of system make full use of internal-combustion engine fuel, improves heat recovery utilization ratio, and makes the internal-combustion engine cylinder liner realize high-efficient thermal management.
In the description of the present solution, it is to be understood that the terms "upper", "lower", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present solution.
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 application, "a plurality" means two or more unless specifically limited otherwise.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A heat management and heat recovery coupling system for a cylinder sleeve of an internal combustion engine is characterized by comprising an internal combustion engine waste heat recovery system and a heat management system which are coupled together and form a circulation loop through a pipeline, wherein a circulation working medium flows in the circulation loop;
the circulating loop comprises a working medium pump (7), a heat regenerator (5), an internal combustion engine cylinder sleeve cooling structure, a gas heater (2), an expander (3) and a condenser (6) which are sequentially communicated, a rotating shaft of the expander (3) is connected with a rotating shaft of a generator (4), and the circulating working medium is CO2Mixtures with organic working substances.
2. The internal combustion engine cylinder sleeve heat management and heat recovery coupling system as claimed in claim 1, wherein the internal combustion engine cylinder sleeve cooling structure is a cooling chamber arranged on the internal combustion engine cylinder sleeve, an inlet end of the cooling chamber is connected with a hot end outlet of the heat regenerator (5), and an outlet end of the cooling chamber is connected with a working medium inlet of the gas heater (2).
3. The internal combustion engine cylinder liner heat management and heat recovery coupling system of claim 1, wherein the heat source of the gas heater (2) is exhaust gas emitted from an internal combustion engine.
4. The internal combustion engine cylinder sleeve heat management and heat recovery coupling system as recited in claim 1, wherein a heat source of the heat regenerator (5) is a circulating working medium discharged from the expander (3).
5. The internal combustion engine cylinder liner heat management and heat recovery coupling system of claim 1, wherein the circulating working medium in the circulating loop is CO2And propane.
6. The internal combustion engine cylinder liner heat management and heat recovery coupling system of claim 1, wherein the circulating working medium in the circulating loop is CO2With n-butane.
7. The internal combustion engine cylinder liner heat management and heat recovery coupling system of claim 1, wherein the circulating working medium in the circulating loop is CO2With trifluorodichloroethane.
8. The internal combustion engine cylinder sleeve heat management and heat recovery coupling system as claimed in claim 1, wherein the circulating working medium at the outlet of the working medium pump (7) is in a supercritical state.
CN201920819373.XU 2019-05-31 2019-05-31 Heat management and heat recovery coupling system for cylinder sleeve of internal combustion engine Active CN210460892U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110067671A (en) * 2019-05-31 2019-07-30 中国科学技术大学 A kind of internal combustion engine cylinder jacket heat management and recuperation of heat coupled system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110067671A (en) * 2019-05-31 2019-07-30 中国科学技术大学 A kind of internal combustion engine cylinder jacket heat management and recuperation of heat coupled system

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