CN111452595A - L NG combined power refrigerator car based on cold and heat energy cascade utilization - Google Patents
L NG combined power refrigerator car based on cold and heat energy cascade utilization Download PDFInfo
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- CN111452595A CN111452595A CN202010322669.8A CN202010322669A CN111452595A CN 111452595 A CN111452595 A CN 111452595A CN 202010322669 A CN202010322669 A CN 202010322669A CN 111452595 A CN111452595 A CN 111452595A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3202—Cooling devices using evaporation, i.e. not including a compressor, e.g. involving fuel or water evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3232—Cooling devices using compression particularly adapted for load transporting vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/20—Refrigerated goods vehicles
- B60P3/205—Refrigerated goods vehicles with means for dividing the interior volume, e.g. movable walls or intermediate floors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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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
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Abstract
The invention provides a L NG combined power refrigerator car based on cold and heat energy gradient utilization, which comprises an engine, a car body and a L NG liquid storage tank, and further comprises a medium-temperature car evaporator, a low-temperature car evaporator, a high-temperature car evaporator and a temperature difference power generation system, wherein the temperature difference power generation system comprises a first power generation module, a second power generation module and a third power generation module, the first power generation module and the third power generation module are arranged below the outside of the car body, the second power generation module is arranged on the periphery of the engine, the inlet of the first power generation module is communicated with the outlet of a L NG liquid storage tank, and the outlet of the first power generation module is sequentially communicated with the low-temperature car evaporator, the medium-temperature car evaporator, the high-temperature car evaporator, the engine, the second power generation module, the third power generation module and a tail gas discharge pipe.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and particularly relates to an L NG combined power refrigerator car based on cold and heat energy gradient utilization.
Background
With the improvement of living standard of people, the freshness and diversity of fresh food have new requirements. At present, the food industry is developed at a high speed, the market expansion and the cold chain logistics are improved continuously, the cold chain demand of China is increased in a geometric progression manner, the market demand of refrigerated vehicles in recent years reaches 7000-8000 vehicles, the refrigerated vehicles are expected to exceed 15 thousands vehicles in 3-5 years in the future, and the growth rate of refrigerated vehicles in 10 years in the future reaches 28%. At present, most of conventional refrigerated vehicles adopt a mechanical refrigeration mode, R134a or R404A is mainly used as a refrigerant, the GWP values of the refrigerant are 1430 and 3920 respectively, the refrigerant belongs to a working medium with high GWP, the refrigerant inevitably leaks, and the greenhouse effect is aggravated. According to the recently reached "Bulgarian amendments" in Montreal protocol, 2016, month 10, and day 15, both were gradually eliminated until obsolescence. Therefore, it is urgent to find new environmental protection refrigerants for the cold chain transportation industry.
The conventional refrigerator car mostly adopts fuel oil as power, and exhaust emission is a great cause of atmospheric pollution and haze problems in winter. And high-temperature tail gas with a large amount of waste heat energy is directly discharged to the atmosphere, resulting in low energy utilization rate. Therefore, the adoption of clean energy to replace conventional fuel oil and the efficient recovery of the waste heat of the tail gas are effective measures for reducing haze weather and improving the energy utilization rate.
Disclosure of Invention
In view of the above, the invention aims to provide an L NG combined power refrigerator car based on cold and heat energy gradient utilization, so as to overcome the defects in the prior art, clean energy L NG can be used as fuel and can realize cold supply, the energy utilization rate can be obviously improved, artificial synthetic refrigerants do not need to be filled, the carbon emission and the greenhouse effect can be obviously reduced, and the purposes of energy conservation and emission reduction are achieved.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the L NG combined power refrigerator car based on cold and heat energy gradient utilization comprises an engine, a carriage box body, a L NG liquid storage tank, a medium-temperature carriage evaporator, a low-temperature carriage evaporator, a high-temperature carriage evaporator and a temperature difference power generation system;
the temperature difference power generation system comprises a first power generation module, a second power generation module and a third power generation module, wherein the first power generation module and the third power generation module are arranged on the lower portion outside a compartment box body, the second power generation module is arranged on the periphery of an engine, the inlet of the first power generation module is communicated with the outlet of an L NG liquid storage tank, and the outlet of the first power generation module is sequentially communicated with a low-temperature compartment evaporator, a medium-temperature compartment evaporator, a high-temperature compartment evaporator, the engine, the second power generation module, the third power generation module and a tail gas discharge pipe.
Furthermore, three closed spaces of a medium-temperature carriage, a low-temperature carriage and a high-temperature carriage are divided in the carriage box body; the medium-temperature compartment evaporator, the low-temperature compartment evaporator and the high-temperature compartment evaporator are respectively arranged in the medium-temperature compartment, the low-temperature compartment and the high-temperature compartment.
Furthermore, the working temperature ranges of the evaporators of the low-temperature compartment and the low-temperature compartment are (-30) to (-15), the working temperature ranges of the evaporators of the middle-temperature compartment and the middle-temperature compartment are (-5) to 10 ℃, and the working temperature ranges of the evaporators of the high-temperature compartment and the high-temperature compartment are 10 ℃ to 25 ℃.
Further, fans are arranged in the medium-temperature compartment, the low-temperature compartment and the high-temperature compartment; each fan is electrically connected with the first power generation module, the second power generation module and the third power generation module. The low-temperature carriage evaporator, the medium-temperature carriage evaporator and the high-temperature carriage evaporator all adopt evaporation coils.
Furthermore, the first power generation module comprises a first heat exchanger, a first thermoelectric power generation sheet and a second heat exchanger, one side of the first thermoelectric power generation sheet is attached to the first heat exchanger, the other side of the first thermoelectric power generation sheet is attached to the second heat exchanger, an inlet of the first heat exchanger is communicated with an outlet of the L NG liquid storage tank, and an outlet of the first heat exchanger is communicated with an inlet of the medium-temperature compartment evaporator.
Further, the second power generation module comprises an engine water jacket, a second thermoelectric power generation sheet and a third heat exchanger, wherein the engine water jacket is wrapped on the periphery of the engine; the inner surface of the second thermoelectric generation sheet is attached to the outer surface of the engine water jacket, and the outer surface of the second thermoelectric generation sheet is attached to the inner surface of the third heat exchanger; an inlet of the third heat exchanger is connected with the high-temperature compartment evaporator, and an outlet of the third heat exchanger is communicated with the engine; the outlet of the engine is communicated with the inlet of the second heat exchanger.
Furthermore, the third power generation module comprises a fourth heat exchanger, a third thermoelectric power generation piece and a high-efficiency heat sink, wherein one side of the third thermoelectric power generation piece is attached to the fourth heat exchanger, and the other side of the third thermoelectric power generation piece is attached to the high-efficiency heat sink; and an inlet of the fourth heat exchanger is communicated with an outlet of the second heat exchanger, and an outlet of the fourth heat exchanger is communicated with the tail gas exhaust pipe.
Further, the first heat exchanger, the second heat exchanger, the third heat exchanger, the fourth heat exchanger and the fifth heat exchanger are all microchannel heat exchangers.
Further, the efficient heat sink is a straight fin type heat sink.
Furthermore, the medium-temperature carriage evaporator, the low-temperature carriage evaporator and the high-temperature carriage evaporator respectively comprise a calandria, the calandria is in a sleeve pipe form and is composed of an inner pipe and an outer pipe which are coaxially and parallelly arranged, composite phase change cold storage materials are filled between the inner pipe and the outer pipe, and a L NG fluid channel is arranged in the inner pipe.
Furthermore, a plurality of fins are uniformly distributed on the outer surface of the outer pipe; the fin material is aluminium.
Compared with the prior art, the L NG combined power refrigerator car based on cold and heat energy cascade utilization has the following advantages:
(1) l NG (namely liquefied natural gas) vaporization temperature-changing cold energy is efficiently and stepwisely utilized, the temperature of L NG fluid at the initial phase change rewarming stage is slowly increased, the temperature is about-160 ℃, the cold energy has high grade cold energy, and the L NG fluid and high-temperature tail gas with a large amount of waste heat energy after combustion of L NG form an efficient temperature difference power generation system, the generated electric energy is supplied to an evaporator, a fan and electric equipment of a refrigerator car in a box body for use, the temperature of L NG fluid at the later phase change rewarming stage is gradually increased, the grade of the cold energy is gradually reduced, good temperature matching is formed by utilizing the vaporization temperature-changing characteristic of the L NG fluid and the box body of compartments in.
(2) L NG combustion waste heat energy is used for cascade power generation, according to different energy grades, the heat dissipated by tail gas and an engine cylinder wall is reasonably matched with L NG rewarming fluid and atmospheric environment in temperature at a cold end and a hot end to form an efficient temperature difference power generation system (TEG) for recycling waste heat energy, and output electric energy can supply power for a refrigerating system of a refrigerator car, so that cascade utilization of energy is realized, and utilization efficiency of energy is improved.
(3) The multi-temperature-zone refrigeration system has the advantages that the multi-temperature-zone refrigeration system is used for refrigerating different goods, a low-temperature freezing zone (corresponding to a low-temperature compartment), a refrigerating zone (corresponding to a medium-temperature compartment) and a normal-temperature zone (corresponding to a high-temperature compartment) are respectively arranged on the refrigerator car body, the transportation frequency of the food can be reduced by arranging the multi-temperature-zone box body, the cost is saved, the intensive and high-efficiency distribution of the agricultural goods is realized, meanwhile, the temperature of each compartment is obtained through the phase-change evaporation of L NG fluid in an independent coil pipe, and the requirements of heat.
(4) L NG phase change cold accumulation evaporator integrates phase change cold accumulation material (PCM) with evaporator by utilizing the heat absorption and release characteristics of the melting and solidification process of the phase change material, reduces the temperature fluctuation of the refrigerator car body caused by different working conditions such as parking, idling, partial load and the like, and ensures that the temperature of each compartment in the refrigerator car is more stable and easier to control.
(5) The device is clean and environment-friendly, and can be used as fuel to provide power and as a refrigerant to provide cold energy by adopting the clean and environment-friendly L NG.
(6) The micro-channel heat exchanger is compact and light, efficient energy conversion equipment is used, the system structure is compact, the weight is light, the space of the refrigerator car is fully utilized, and the safety performance is high. Compared with the conventional vapor compression air conditioning system, the air conditioning system has the advantages of simple equipment, light weight and reduced vehicle load.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of an L NG combined power refrigerator car based on the cascade utilization of cold and heat energy according to the present invention
FIG. 2 is a schematic diagram of a temperature difference power generation system for cascade power generation and utilization of waste heat energy generated after L NG combustion
Fig. 3 is an integrated schematic diagram of an evaporator and a composite phase change cold storage material (PCM) in a vehicle cabin.
Description of reference numerals:
1-L NG liquid storage tank, 2-first heat exchanger, 3-first thermoelectric generation piece, 4-second thermoelectric generation piece, 5-third heat exchanger, 6-engine water jacket, 7-middle temperature compartment evaporator, 8-blower, 9-middle temperature compartment, 10-low temperature compartment evaporator, 11-low temperature compartment, 12-high temperature compartment evaporator, 13-high temperature compartment, 14-fourth heat exchanger, 15-third thermoelectric generation piece, 16-high efficiency heat sink, 17-tail gas exhaust pipe, 18-second heat exchanger, 19-engine, 201-inner pipe, 202-outer pipe, 203-composite phase change cold accumulation material, 204-fin and 205-L NG fluid.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in figures 1 and 2, the L NG combined power refrigerator car based on cold and heat energy gradient utilization comprises an engine 19, a car body, a L NG liquid storage tank 1, a medium-temperature car evaporator 7, a low-temperature car evaporator 10, a high-temperature car evaporator 12 and a temperature difference power generation system, wherein the temperature difference power generation system comprises a first power generation module, a second power generation module and a third power generation module, the first power generation module and the third power generation module are arranged below the outside of the car body, the second power generation module is arranged on the periphery of the engine 19, the inlet of the first power generation module is communicated with the outlet of the L NG liquid storage tank 1, the outlet of the first power generation module is sequentially communicated with the low-temperature car evaporator 10, the medium-temperature car evaporator 7, the high-temperature car evaporator 12, the engine 19, the second power generation module, the third power generation module and a tail gas discharge pipe 17.
In an optional embodiment of the present invention, three enclosed spaces (where the enclosed spaces are closed spaces that may have doors like a refrigerator but need to be sealed) are defined in the middle-temperature compartment 9, the low-temperature compartment 11, and the high-temperature compartment 13, respectively, a middle-temperature compartment evaporator 7, a low-temperature compartment evaporator 10, and a high-temperature compartment evaporator 12 are provided in the middle-temperature compartment 9, the low-temperature compartment evaporator, the middle-temperature compartment evaporator, and the high-temperature compartment evaporator, respectively, and only the refrigeration temperatures that can be realized by the evaporation coils are different, it should be noted that, in the present invention, the "low temperature" temperature range in the low-temperature compartment 11 and the low-temperature compartment evaporator 10 is (-30) — (-15), "middle temperature" temperature range in the middle-temperature compartment evaporator 7 is (-5) - ("10 ℃), and" high temperature "temperature range in the high-temperature compartment 13 and the high-temperature compartment evaporator 12 is 10 to 25 ℃," the "temperature range" may also be understood as the working temperature ranges of the respective compartment and the evaporator, and thus, the temperature ranges of the middle-temperature compartment evaporator 9 and the high-temperature compartment evaporator 13 compartment evaporator may be regarded as a cold storage compartment, and the refrigeration compartment may be realized by providing multiple temperature preservation of the refrigeration compartment, and the preservation of the refrigeration compartment may be realized by providing refrigeration compartment may be regarded as a refrigeration compartment, and may be realized by providing refrigeration compartment, and may be regarded as a refrigeration compartment, and may.
More specifically, as shown in FIG. 3, the middle-temperature compartment evaporator 7, the low-temperature compartment evaporator 10 and the high-temperature compartment evaporator 12 all comprise a calandria, a calandria is in the form of a sleeve and is composed of an inner tube 201 and an outer tube 202 which are coaxially and parallelly arranged, the materials of the inner tube 201 and the outer tube 201 can be selected from copper, the phase change cold storage material 203 is filled between the inner tube 201 and the outer tube 202, the phase change cold storage material 203 in the inner tubes of the middle-temperature compartment evaporator 7, the low-temperature compartment evaporator 10 and the high-temperature compartment evaporator 12 can be selected according to the design temperature of each box, and particularly, the phase change cold storage material 203 filled in the inner tube of the low-temperature compartment evaporator 10 can be selected from eutectic phase change materials such as SN26 (phase change temperature-26 ℃), TH-21 (phase change temperature-21 ℃), ST L-21 (phase change temperature-21 ℃), TH-16 (phase change temperature-16 ℃) and the like, preferably TH-21 (phase change temperature-16 ℃) is selected from a eutectic phase change material filled in which is filled with a phase change material such as a phase change temperature change material, such as a phase change temperature of a heat transfer medium temperature of a medium temperature, a medium-temperature phase change material such as a medium-temperature phase-medium-temperature compartment evaporator 7-medium-.
As an alternative embodiment of the present invention, a blower 8 is installed in each of the medium temperature compartment 9, the low temperature compartment 11 and the high temperature compartment 13, and each blower 8 may be fixed at the top end of the compartment body where it is located by a bracket. Each fan 8 is electrically connected to the first power generation module, the second power generation module, and the third power generation module, specifically, to the thermoelectric power generation elements in each power generation module (see the following description), when the direct current and the alternating current are exchanged, a reverse device (also called an inverter) needs to be installed, and when only the direct current is involved, the reverse device (also called an inverter) is not needed.
As an optional implementation mode of the invention, the first power generation module comprises a first heat exchanger 2, a first thermoelectric power generation sheet 3 and a second heat exchanger 18, one side of the first thermoelectric power generation sheet 3 is attached to the first heat exchanger 2, the other side of the first thermoelectric power generation sheet is attached to the second heat exchanger 18, an inlet of the first heat exchanger 2 is communicated with an outlet of the L NG liquid storage tank 1, an outlet of the first heat exchanger 2 is communicated with an inlet of the middle-temperature compartment evaporator 7, and the first thermoelectric power generation sheet 3 is electrically connected with each fan 8.
As an alternative embodiment of the invention, the second power generation module comprises an engine water jacket 6, a second thermoelectric power generation sheet 4 and a third heat exchanger 5, wherein the engine water jacket 6 is wrapped on the periphery of the engine 19; the inner surface of the second thermoelectric generation piece 4 is attached to the outer surface of the engine water jacket 6, and the outer surface is attached to the inner surface of the third heat exchanger 5; the inlet of the third heat exchanger 5 is connected with the high-temperature compartment evaporator 12, the outlet of the third heat exchanger 5 is communicated with an engine 19, and the outlet of the engine 19 is communicated with the inlet of the second heat exchanger 18. The second thermoelectric generation piece 4 is electrically connected with each fan 8.
As an optional implementation manner of the present invention, the third power generation module includes a fourth heat exchanger 14, a third thermoelectric power generation sheet 15 and a high-efficiency heat sink 16, wherein one side of the third thermoelectric power generation sheet 15 is attached to the fourth heat exchanger 14, and the other side is attached to the high-efficiency heat sink 16; an inlet of the fourth heat exchanger 14 is communicated with an outlet of the second heat exchanger 18, and an outlet of the fourth heat exchanger 14 is communicated with the tail gas exhaust pipe 17. The third thermoelectric generation piece 15 is electrically connected with each fan 8.
As an optional embodiment of the present invention, the first heat exchanger 2, the second heat exchanger 18, the third heat exchanger 5, and the fourth heat exchanger 14 all employ microchannel heat exchangers. The efficient energy conversion equipment using the micro-channel heat exchanger has the advantages of compact system structure, light weight, full utilization of the space of the refrigerator car and high safety performance. Compared with the conventional vapor compression air conditioning system, the air conditioning system has the advantages of simple equipment, light weight and reduced vehicle load.
As an alternative embodiment of the present invention, the high efficiency heat sink 16 is a straight fin heat sink.
In the present invention, the medium-temperature compartment evaporator 7, the low-temperature compartment evaporator 10, the high-temperature compartment evaporator 12, and each fan 8 may be mounted on a bracket by means of bolts or welding, and the medium-temperature compartment evaporator 7, the low-temperature compartment evaporator 10, the high-temperature compartment evaporator 12, and each fan 8 may be mounted on a bracket by means of bolts or welding. Of course, the medium-temperature compartment evaporator 7, the low-temperature compartment evaporator 10, the high-temperature compartment evaporator 12, the fans 8, and the like may be directly mounted in the respective compartment spaces by bolts.
When the energy utilization process of L NG is used, the energy utilization process comprises a cold energy high-efficiency cascade utilization process of a L NG temperature-changing vaporization process and a waste heat energy cascade power generation utilization process after L NG combustion, and the energy utilization process comprises the following steps:
l NG temperature-changing gasification phase-changing cold energy gradient utilization process, (1) L NG gasification process is temperature-changing process, L NG is primarily phase-changing gasification in the first heat exchanger 2 after flowing out from the L NG liquid storage tank 1, the gasification initial temperature is very low, the gasification initial temperature has high-grade cold energy, the cold energy is used as the low-temperature end of the first power generation module, the second heat exchanger 18 of high-temperature tail gas after L NG combustion is used as the high-temperature end of the first power generation module and is attached to two ends of the first temperature difference power generation sheet 3 to form a first power generation module, and the generated electric energy is supplied to a fan 8 in a compartment body and electric equipment of a refrigerator car for use, and (2) L NG fluid is reduced in grade and increased in temperature after being primarily phase-changing gasification from the first heat exchanger 2, and sequentially flows into the low-temperature evaporator 10, the medium-temperature compartment evaporator 7 and the high-temperature compartment evaporator 12 to form good temperature matching with the low-temperature compartment 11, the medium-temperature compartment.
The waste heat energy cascade utilization part comprises (1) L NG entering a third heat exchanger 5 from a high-temperature compartment evaporator 12 after complete gasification to serve as a low-temperature end of a second power generation module, wherein waste heat dissipated by a cylinder wall of an engine 19 is transferred to an engine water jacket 6 to serve as a high-temperature end of the second power generation module, the third heat exchanger 5, the engine water jacket 6 and a second thermoelectric power generation sheet 4 form the second power generation module, and output electric energy can supply power to a fan 8 of a refrigerating system of a refrigerator car, (2) L NG gas heated by the third heat exchanger 5 enters the engine 19 to be combusted, medium-high temperature smoke generated by combustion enters a second heat exchanger 18 to be matched with L NG rewarming fluid flowing through the first heat exchanger 2 in cold and hot end temperature to form a first power generation module, waste heat energy is recycled, the output electric energy can supply power to the fan 8 of the refrigerating system of the refrigerator car, and (3) tail gas flowing into the second heat exchanger 18 is reduced in temperature to enter a fourth heat exchanger 14 to form the third power generation module with a high-efficiency heat sink 16 and the third thermoelectric power generation sheet 15, the tail gas temperature of the fourth heat exchanger 14 is further.
The L NG combined power refrigerator car based on cold and heat energy gradient utilization realizes gradient utilization of energy by efficiently utilizing energy of clean energy L NG after rewarming and combustion doing work, realizes efficient heat exchange of a power generation system through a micro-channel heat exchange technology, is compact in overall structure, optimally designs a novel L NG phase change cold accumulation evaporator by combining a phase change cold accumulation technology to ensure stability of temperature of a carriage under variable working conditions such as idling of an engine, variable load and the like, reduces temperature fluctuation of the carriage, and can be used as a refrigerant for cold supply and also used as fuel for providing power only by using liquefied natural gas (L NG).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The L NG combined power refrigerator car based on cold and heat energy gradient utilization comprises an engine, a carriage box body and a L NG liquid storage tank, and is characterized by further comprising a medium-temperature carriage evaporator, a low-temperature carriage evaporator, a high-temperature carriage evaporator and a temperature difference power generation system;
the temperature difference power generation system comprises a first power generation module, a second power generation module and a third power generation module, wherein the first power generation module and the third power generation module are arranged on the lower portion outside a compartment box body, the second power generation module is arranged on the periphery of an engine, the inlet of the first power generation module is communicated with the outlet of an L NG liquid storage tank, and the outlet of the first power generation module is sequentially communicated with a low-temperature compartment evaporator, a medium-temperature compartment evaporator, a high-temperature compartment evaporator, the engine, the second power generation module, the third power generation module and a tail gas discharge pipe.
2. The L NG combined power refrigerator car based on cold and heat energy cascade utilization is characterized in that three closed spaces of a medium-temperature compartment, a low-temperature compartment and a high-temperature compartment are divided in the compartment body, wherein a medium-temperature compartment evaporator, a low-temperature compartment evaporator and a high-temperature compartment evaporator are respectively arranged in the medium-temperature compartment, the low-temperature compartment and the high-temperature compartment;
and/or the working temperature ranges of the evaporators of the low-temperature compartment and the low-temperature compartment are (-30) to (-15), the working temperature ranges of the evaporators of the middle-temperature compartment and the middle-temperature compartment are (-5) to 10 ℃, and the working temperature ranges of the evaporators of the high-temperature compartment and the high-temperature compartment are 10 to 25 ℃.
3. The L NG combined power refrigerator car based on cold and heat energy cascade utilization of claim 2, wherein a fan is installed in each of the medium-temperature compartment, the low-temperature compartment and the high-temperature compartment, and each fan is electrically connected with the first power generation module, the second power generation module and the third power generation module.
4. The L NG combined power refrigerator car based on cold and heat energy cascade utilization is characterized in that the first power generation module comprises a first heat exchanger, a first thermoelectric power generation piece and a second heat exchanger, one side of the first thermoelectric power generation piece is attached to the first heat exchanger, the other side of the first thermoelectric power generation piece is attached to the second heat exchanger, an inlet of the first heat exchanger is communicated with an outlet of the L NG liquid storage tank, and an outlet of the first heat exchanger is communicated with an inlet of the middle-temperature compartment evaporator.
5. The L NG combined power refrigerator car based on cold and heat energy cascade utilization is characterized in that the second power generation module comprises an engine water jacket, a second thermoelectric power generation sheet and a third heat exchanger, the engine water jacket wraps the periphery of the engine, the inner surface of the second thermoelectric power generation sheet is attached to the outer surface of the engine water jacket, the outer surface of the second thermoelectric power generation sheet is attached to the inner surface of the third heat exchanger, the inlet of the third heat exchanger is connected with a high-temperature compartment evaporator, the outlet of the third heat exchanger is communicated with the engine, and the outlet of the engine is communicated with the inlet of the second heat exchanger.
6. The L NG combined power refrigerator car based on cold and heat energy cascade utilization is characterized in that the third power generation module comprises a fourth heat exchanger, a third thermoelectric power generation piece and a high-efficiency heat sink, one side of the third thermoelectric power generation piece is attached to the fourth heat exchanger, the other side of the third thermoelectric power generation piece is attached to the high-efficiency heat sink, an inlet of the fourth heat exchanger is communicated with an outlet of the second heat exchanger, and an outlet of the fourth heat exchanger is communicated with a tail gas exhaust pipe.
7. The L NG combined power refrigerator car based on cold and heat energy cascade utilization of claim 6, wherein the first heat exchanger, the second heat exchanger, the third heat exchanger, the fourth heat exchanger and the fifth heat exchanger are all microchannel heat exchangers.
8. The L NG combined power refrigerator car based on cold and heat energy cascade utilization of claim 6, wherein the high efficiency heat sink is a straight fin heat sink.
9. The L NG combined power refrigerator car based on cold and heat energy cascade utilization is characterized in that the low-temperature carriage evaporator, the medium-temperature carriage evaporator and the high-temperature carriage evaporator all adopt evaporation coils, each of the medium-temperature carriage evaporator, the low-temperature carriage evaporator and the high-temperature carriage evaporator comprises a calandria, each calandria is in a sleeve pipe form and is composed of an inner pipe and an outer pipe which are coaxially and parallelly arranged, composite phase-change cold storage materials are filled between the inner pipe and the outer pipe, and a L NG fluid channel is formed in the inner pipe.
10. The L NG combined power refrigerator car based on cold and heat energy cascade utilization of claim 9, wherein a plurality of fins are uniformly distributed on the outer surface of the outer tube, and the fins are made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112875981A (en) * | 2021-01-04 | 2021-06-01 | 浙江华川实业集团有限公司 | Comprehensive treatment process method for papermaking wastewater and printing and dyeing wastewater in energy-saving workshop |
| CN113301774A (en) * | 2021-04-19 | 2021-08-24 | 天津商业大学 | Clean high-energy-efficiency high-heat-flow-density data center hybrid multi-energy system |
| WO2023155467A1 (en) * | 2022-02-15 | 2023-08-24 | 江苏科技大学 | Cold energy collection device used for reducing carbon emission for refrigerated vehicle |
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2020
- 2020-04-22 CN CN202010322669.8A patent/CN111452595A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112875981A (en) * | 2021-01-04 | 2021-06-01 | 浙江华川实业集团有限公司 | Comprehensive treatment process method for papermaking wastewater and printing and dyeing wastewater in energy-saving workshop |
| CN112875981B (en) * | 2021-01-04 | 2022-09-13 | 浙江华川实业集团有限公司 | Comprehensive treatment process method for papermaking wastewater and printing and dyeing wastewater in energy-saving workshop |
| CN113301774A (en) * | 2021-04-19 | 2021-08-24 | 天津商业大学 | Clean high-energy-efficiency high-heat-flow-density data center hybrid multi-energy system |
| WO2023155467A1 (en) * | 2022-02-15 | 2023-08-24 | 江苏科技大学 | Cold energy collection device used for reducing carbon emission for refrigerated vehicle |
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