CN210242076U - Vehicle waste heat recovery system with double heat regenerators - Google Patents
Vehicle waste heat recovery system with double heat regenerators Download PDFInfo
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- CN210242076U CN210242076U CN201921012626.9U CN201921012626U CN210242076U CN 210242076 U CN210242076 U CN 210242076U CN 201921012626 U CN201921012626 U CN 201921012626U CN 210242076 U CN210242076 U CN 210242076U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
Abstract
The utility model discloses a vehicle waste heat recovery system with double heat regenerators, which comprises an engine, a working medium pump, an evaporator, an expander, a condenser, a first heat regenerator, a second heat regenerator and a preheater; the heat source inlet of the evaporator is communicated with an exhaust pipe of the engine, and the preheater is communicated with a cooling water inlet and a cooling water outlet of the engine; the working medium pump is communicated with a first organic working medium inlet of the first regenerator, a first organic working medium outlet of the first regenerator is communicated with a working medium inlet of the preheater, a working medium outlet of the preheater is communicated with a third organic working medium inlet of the second regenerator, a third organic working medium outlet of the second regenerator is communicated with the evaporator, a working medium outlet of the expander is communicated with a fourth organic working medium inlet of the second regenerator, a fourth organic working medium outlet of the second regenerator is communicated with a second organic working medium inlet of the first regenerator, and a second organic working medium outlet of the first regenerator is communicated with the condenser. The utility model discloses can retrieve two kinds of waste heat simultaneously, simple structure is convenient for maintain and heat exchange efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of organic rankine cycle, especially, relate to a take automobile-used waste heat recovery system of two regenerators for retrieving engine exhaust waste heat and cooling water waste heat simultaneously.
Background
From the energy balance of the engine, the output effective power generally accounts for only 30% -45% (diesel engine) or 20% -30% (gasoline engine) of the total heat of fuel combustion, and the rest waste heat energy is mainly discharged into the atmosphere through exhaust (200-. Therefore, the efficient conversion and reuse of the waste heat energy of the engine is an effective way for improving the total energy efficiency, reducing the oil consumption and reducing the pollutant emission. Rankine cycles are generally selected as basic schemes for recovering waste heat of engines of large vehicles, and how to improve the waste heat recovery efficiency of the Rankine cycles for vehicles is the direction of current research.
At present, part of automobile waste heat recovery systems comprise a traditional organic Rankine cycle, only the waste heat of tail gas of an engine can be recovered, and the output power and the heat efficiency of the system are low; the other part of the vehicle waste heat recovery system can simultaneously recover the waste heat of the tail gas of the engine and the waste heat of the cooling water, but the other part of the vehicle waste heat recovery system comprises two sets of organic Rankine cycles, and has more shunting branches, more complex structure and inconvenience for vehicle-mounted transportation and maintenance.
SUMMERY OF THE UTILITY MODEL
Aim at overcoming exist among the above-mentioned prior art not enough, the utility model provides a technical problem be, provided a simple be convenient for maintain and the high automobile-used waste heat recovery system of taking two regenerators of heat exchange efficiency, can retrieve two kinds of waste heats simultaneously.
The technical scheme adopted by the utility model for solving the technical problems is to provide a vehicular waste heat recovery system with a double heat regenerator, which comprises an engine, a working medium pump, an evaporator, an expander and a condenser, wherein the working medium pump, the evaporator, the expander and the condenser are sequentially connected in a circulating way from head to tail; the heat source inlet of the evaporator is communicated with an exhaust pipe of the engine, and the heat recovery system is characterized by further comprising a first heat regenerator, a second heat regenerator and a preheater;
the heat source inlet of the preheater is communicated with the cooling water outlet of the engine, and the heat source outlet of the preheater is communicated with the cooling water inlet of the engine;
the first heat regenerator comprises a first organic working medium inlet, a first organic working medium outlet, a second organic working medium inlet and a second organic working medium outlet; the second heat regenerator comprises a third organic working medium inlet, a third organic working medium outlet, a fourth organic working medium inlet and a fourth organic working medium outlet;
the working medium outlet of the working medium pump is communicated with the organic working medium first inlet, the organic working medium first outlet is communicated with the working medium inlet of the preheater, the working medium outlet of the preheater is communicated with the organic working medium third inlet, the organic working medium third outlet is communicated with the working medium inlet of the evaporator, the working medium outlet of the expander is communicated with the organic working medium fourth inlet, the organic working medium fourth outlet is communicated with the organic working medium second inlet, and the organic working medium second outlet is communicated with the working medium inlet of the condenser.
Preferably, the vehicle waste heat recovery system further comprises a liquid storage tank, and organic working media for recycling of the working media are stored in the liquid storage tank;
and the inlet of the liquid storage tank is communicated with the working medium outlet of the condenser, and the outlet of the liquid storage tank is communicated with the working medium inlet of the working medium pump.
Preferably, the organic working fluid is pentafluoropropane.
Preferably, the vehicle waste heat recovery system further comprises a generator coaxially connected with the expander.
Preferably, the expander is a radial inflow turboexpander.
Preferably, the condenser is a water-cooled condenser.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the utility model discloses a take automobile-used waste heat recovery system of two regenerators, in addition to including four major part (working medium pump, evaporimeter, expander and condenser) of traditional organic rankine cycle, still increased preheater, and two regenerators; the two heat regenerators can ensure that the preheater can fully recover the waste heat of the cooling water, and the evaporator can fully recover the waste heat of the tail gas of the engine; the heat load of the condenser is reduced by reasonably utilizing the heat exchange mode of the same working medium in the heat regenerator, and the output power and the heat efficiency of the whole system are improved.
Moreover, the utility model only has one set of organic working medium circulation pipeline, namely the whole system has no branch; the vehicle-mounted transportation, control and maintenance are convenient.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
in the figure, 1-evaporator, 2-expander, 3-condenser, 4-working medium pump, 5-first heat regenerator, 6-second heat regenerator, 7-preheater, 8-engine, 9-liquid storage tank and 10-generator.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The first embodiment is as follows:
the organic Rankine cycle is ORC for short, and is a Rankine cycle using low-cost organic matters as working media. As shown in fig. 1, a vehicular waste heat recovery system with a double heat regenerator comprises a working medium pump 4, an evaporator 1, an expander 2 and a condenser 3 which are sequentially connected end to end in a circulating manner; the arrangement of the four major components in this embodiment is the same as that in a conventional organic rankine cycle, and will not be described herein.
The system comprises four parts, a first heat regenerator 5 (which exchanges heat by using the same organic working medium in different states), a second heat regenerator 6 and a preheater 7; the heat source inlet of the evaporator 1 is communicated with the exhaust pipe of the engine 8; the heat source inlet of the preheater 7 is communicated with the cooling water outlet of the engine 8, and the heat source outlet of the preheater 7 is communicated with the cooling water inlet of the engine 8.
The first heat regenerator 5 comprises four ports, namely a first organic working medium inlet, a first organic working medium outlet, a second organic working medium inlet and a second organic working medium outlet; the second heat regenerator 6 also comprises four ports, namely a third organic working medium inlet, a third organic working medium outlet, a fourth organic working medium inlet and a fourth organic working medium outlet;
the working medium outlet of the working medium pump 4 is communicated with the organic working medium first inlet of the first heat regenerator 5, the organic working medium first outlet of the first heat regenerator 5 is communicated with the working medium inlet of the preheater 7, the working medium outlet of the preheater 7 is communicated with the organic working medium third inlet of the second heat regenerator 6, the organic working medium third outlet of the second heat regenerator 6 is communicated with the working medium inlet of the evaporator 1, the working medium outlet of the expander 2 is communicated with the organic working medium fourth inlet of the second heat regenerator 6, the organic working medium fourth outlet of the second heat regenerator 6 is communicated with the organic working medium second inlet of the first heat regenerator 5, and the organic working medium second outlet of the first heat regenerator 5 is communicated with the working medium inlet of the condenser 3.
Wherein, the expander 2 and the generator 10 are coaxial and connected together through a flange; the expander 2 in this embodiment is a radial turbine expander (which may also be a piston expander or other type of expander). The condenser 3 is an air-cooled condenser (may be a water-cooled condenser).
The specific working process of this embodiment is as follows:
the tail gas of the engine after SCR treatment enters the evaporator 1, and the cooling water of the engine 8 enters the preheater 7.
The liquid organic working medium is pressurized by the working medium pump 4 and then enters the first regenerator 5 through the organic working medium first inlet of the first regenerator 5 for heat exchange, the heated liquid organic working medium enters the preheater 7 through the organic working medium first outlet of the first regenerator 5 and absorbs heat from cooling water in the preheater 7, the liquid organic working medium with a certain temperature enters the second regenerator 6 through the organic working medium third inlet of the second regenerator 6 for heat exchange, the reheated liquid organic working medium enters the evaporator 1 through the organic working medium third outlet of the second regenerator 6 and absorbs heat from high-temperature tail gas in the evaporator 1 to generate saturated steam or superheated steam, and the steam enters the expander 2 for expansion to work, so that the generator 10 is driven to work; the exhaust steam (steam) still having high temperature and discharged from the expander 2 enters the second heat regenerator 6 through the organic working medium fourth inlet of the second heat regenerator 6, the heat is transferred to the organic working medium (the liquid organic working medium which enters the second heat regenerator 6 after the preheater 7 exits) which is about to enter the evaporator 1, the gaseous organic working medium which still has high temperature and flows out from the organic working medium fourth outlet of the second heat regenerator 6 enters the first heat regenerator 5 through the organic working medium second inlet of the first heat regenerator 5, the heat is transferred to the organic working medium (the liquid organic working medium which enters the first heat regenerator 6 after the working medium pump 4 is pressurized), the low-temperature gaseous organic working medium which enters the condenser 3 from the organic working medium second outlet of the first heat regenerator 5 enters the condenser 3 and releases the heat to the cooling medium air in the condenser 3, the liquid organic working medium is generated again, enters the working medium pump 4 for next circulation.
Example two:
the present embodiment is different from the first embodiment in that:
in order to ensure the supply of the organic working medium, the vehicle waste heat recovery system with the double heat regenerators of the embodiment is also additionally provided with a liquid storage tank 9, and the liquid storage tank 9 stores the organic working medium; the inlet of the liquid storage tank 9 is communicated with the working medium outlet of the condenser 3, and the outlet of the liquid storage tank 9 is communicated with the working medium inlet of the working medium pump 4.
In the embodiment, the organic working medium is pentafluoropropane; other low boiling point organics are also possible. And the condenser 3 is a water-cooled condenser (or an air-cooled condenser). The low-temperature gaseous organic working medium from the second organic working medium outlet of the first heat regenerator 5 enters the condenser 3 and releases heat to the cooling medium water in the condenser 3.
The specific working process of this embodiment and the specific working engineering of the first embodiment are the same, and are not described herein again.
The two heat regenerators can ensure that the preheater 7 can fully recover the waste heat of the cooling water, and the evaporator 1 can fully recover the waste heat of the tail gas of the engine; the self heat exchange modes of the same working medium in different states in the heat regenerator are reasonably utilized, the heat exchange efficiency is improved, and meanwhile, the temperature of the gaseous organic working medium entering the condenser 3 can be reduced, namely, the heat load of the condenser 3 is reduced. In short, the utility model can recover two kinds of waste heat simultaneously only by one set of organic working medium circulation pipeline, the system output power and the heat exchange efficiency are high, and the cost is low; the whole system is not provided with a shunt branch; simple structure, and is convenient for vehicle-mounted transportation, control and maintenance.
The above description is of the preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification and improvement made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (6)
1. A vehicle waste heat recovery system with double heat regenerators comprises an engine, and a working medium pump, an evaporator, an expander and a condenser which are sequentially connected in a circulating manner from head to tail; the heat source inlet of the evaporator is communicated with an exhaust pipe of the engine, and the heat recovery system is characterized by further comprising a first heat regenerator, a second heat regenerator and a preheater;
the heat source inlet of the preheater is communicated with the cooling water outlet of the engine, and the heat source outlet of the preheater is communicated with the cooling water inlet of the engine;
the first heat regenerator comprises a first organic working medium inlet, a first organic working medium outlet, a second organic working medium inlet and a second organic working medium outlet; the second heat regenerator comprises a third organic working medium inlet, a third organic working medium outlet, a fourth organic working medium inlet and a fourth organic working medium outlet;
the working medium outlet of the working medium pump is communicated with the organic working medium first inlet, the organic working medium first outlet is communicated with the working medium inlet of the preheater, the working medium outlet of the preheater is communicated with the organic working medium third inlet, the organic working medium third outlet is communicated with the working medium inlet of the evaporator, the working medium outlet of the expander is communicated with the organic working medium fourth inlet, the organic working medium fourth outlet is communicated with the organic working medium second inlet, and the organic working medium second outlet is communicated with the working medium inlet of the condenser.
2. The vehicular waste heat recovery system with a dual regenerator of claim 1, further comprising a liquid storage tank, wherein the liquid storage tank stores organic working medium for recycling of the working medium;
and the inlet of the liquid storage tank is communicated with the working medium outlet of the condenser, and the outlet of the liquid storage tank is communicated with the working medium inlet of the working medium pump.
3. The vehicular waste heat recovery system with a dual regenerator of claim 2, wherein the organic working medium is pentafluoropropane.
4. The vehicle waste heat recovery system with dual regenerators of claim 1 further comprising a generator coaxially connected to the expander.
5. The vehicular waste heat recovery system with a dual regenerator of claim 4, wherein the expander is a radial inflow turbo expander.
6. The vehicular waste heat recovery system with a dual regenerator of claim 1, wherein the condenser is a water-cooled condenser.
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| CN201921012626.9U CN210242076U (en) | 2019-06-28 | 2019-06-28 | Vehicle waste heat recovery system with double heat regenerators |
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| CN201921012626.9U CN210242076U (en) | 2019-06-28 | 2019-06-28 | Vehicle waste heat recovery system with double heat regenerators |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199065A (en) * | 2021-11-29 | 2022-03-18 | 北京微焓科技有限公司 | Condensation waste heat recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199065A (en) * | 2021-11-29 | 2022-03-18 | 北京微焓科技有限公司 | Condensation waste heat recovery system |
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