CN107062684B - It is a kind of without pump ejector refrigeration system and refrigerating method - Google Patents
It is a kind of without pump ejector refrigeration system and refrigerating method Download PDFInfo
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 83
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 239000003507 refrigerant Substances 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000008020 evaporation Effects 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 19
- 230000001105 regulatory effect Effects 0.000 description 17
- 239000012530 fluid Substances 0.000 description 13
- 238000001816 cooling Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002440 industrial waste Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- CDOOAUSHHFGWSA-OWOJBTEDSA-N (e)-1,3,3,3-tetrafluoroprop-1-ene Chemical compound F\C=C\C(F)(F)F CDOOAUSHHFGWSA-OWOJBTEDSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B19/00—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
- F25B19/02—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
本发明公开了一种无泵喷射式制冷系统和制冷方法，其解决了现有技术中的喷射式制冷系统的制冷效率低、动力设备循环泵的造价昂贵的问题，包括第一发生器、气体喷射器、冷凝器、蒸发器、第二发生器和气液引射器，其中，第一发生器的出口与气体喷射器的引射蒸汽入口连接，气体喷射器的出口与冷凝器的入口连接，冷凝器的出口分为两个支路，一个支路通过蒸发器与气体喷射器的蒸汽入口连接；另一支路与气液引射器的液体入口连接；气液引射器的出口分为两个支路，一个支路与第一发生器的入口连接，另一个支路与第二发生器的入口连接，第二发生器的出口与气液引射器的蒸汽入口连接。
The invention discloses a pumpless jet refrigeration system and a refrigeration method, which solve the problems of low refrigeration efficiency and high cost of power equipment circulation pumps in the jet refrigeration system in the prior art, including a first generator, a gas Ejector, condenser, evaporator, second generator and gas-liquid ejector, wherein the outlet of the first generator is connected to the injection steam inlet of the gas ejector, and the outlet of the gas ejector is connected to the inlet of the condenser, The outlet of the condenser is divided into two branches, one branch is connected to the steam inlet of the gas ejector through the evaporator; the other branch is connected to the liquid inlet of the gas-liquid ejector; the outlet of the gas-liquid ejector is divided into Two branches, one branch is connected with the inlet of the first generator, the other branch is connected with the inlet of the second generator, and the outlet of the second generator is connected with the steam inlet of the gas-liquid ejector.
Description
技术领域technical field
本发明属于能源技术和制冷技术领域，具体涉及一种无泵喷射式制冷系统和制冷方法。The invention belongs to the fields of energy technology and refrigeration technology, and in particular relates to a pumpless jet refrigeration system and a refrigeration method.
背景技术Background technique
随着环境和能源问题越来越突出，常规能源紧缺引发了国内外学者对新能源及其利用技术的探索。太阳能、废热等低品位热源因在某些喷射式制冷系统如太阳能喷射式、低品位废热喷射式制冷系统及其热泵系统中的利用受到人们广泛关注。其中，喷射式制冷系统凭借其结构简单、使用寿命长、系统稳定性高等优点，在近10年受到制冷界的青睐，但由于其制冷效率较低，无法广泛推广应用。如，太阳能喷射式制冷系统的制冷效率较低，需要通过增加增压喷射系统的方式改善喷射系统的性能，以提高制冷效率。但是增压喷射系统的增加，无疑提高了制冷系统的成本。而且，现有的喷射式制冷系统中都需要使用循环泵将制冷剂液体增压，所需的循环泵作为唯一的运动部件，需要的压头高、体积大，造价昂贵，大大限制了喷射式制冷系统的应用。As environmental and energy issues become more and more prominent, the shortage of conventional energy has triggered the exploration of new energy and its utilization technology by scholars at home and abroad. Low-grade heat sources such as solar energy and waste heat have attracted widespread attention due to their use in some ejector refrigeration systems such as solar ejection, low-grade waste heat ejection refrigeration systems and their heat pump systems. Among them, the ejector refrigeration system has been favored by the refrigeration industry in the past 10 years due to its simple structure, long service life, and high system stability. However, due to its low refrigeration efficiency, it cannot be widely used. For example, the cooling efficiency of the solar jet refrigeration system is low, and it is necessary to improve the performance of the jet system by adding a pressurized jet system to increase the cooling efficiency. However, the increase of the pressurized injection system undoubtedly increases the cost of the refrigeration system. Moreover, in the existing injection refrigeration systems, it is necessary to use a circulation pump to pressurize the refrigerant liquid. The required circulation pump is the only moving part, which requires a high pressure head, large volume, and high cost, which greatly limits the efficiency of the injection refrigeration system. application in refrigeration systems.
综上所述，现有技术中的喷射式制冷系统的制冷效率低、动力设备循环泵的造价昂贵的问题，尚缺乏有效的解决方案。To sum up, there is still no effective solution to the problems of low refrigeration efficiency of the jet refrigeration system and high cost of the circulation pump of the power equipment in the prior art.
发明内容Contents of the invention
发明人为了解决喷射式制冷系统中循环泵的造价较高的问题，尝试将循环泵替换为气液引射器，在发生器内，循环制冷剂吸收热量变为高温高压的蒸汽，其中一部分高压蒸汽通过气体喷射器，在喷嘴的出口处形成较低的压力，从而将经过冷凝器冷凝，再经蒸发器蒸发得到的低压蒸汽引射入气体喷射器中，两股流体混合为一股压力较高的流体后排入冷凝器中冷凝为液体，一部分液体经过上述蒸发器蒸发，另一部分液体被来自发生器的剩余的高压蒸汽引射进入替换后的气液喷射器中，两股流体充分混合为一股流体后，被重新送回发生器中循环。In order to solve the problem of high cost of the circulating pump in the ejector refrigeration system, the inventor tried to replace the circulating pump with a gas-liquid ejector. In the generator, the circulating refrigerant absorbs heat and turns into high-temperature and high-pressure steam, and part of the high-pressure The steam passes through the gas injector, forming a lower pressure at the outlet of the nozzle, so that the low-pressure steam obtained by condensing through the condenser and evaporating through the evaporator is introduced into the gas injector, and the two streams are mixed into one with a lower pressure. The high fluid is discharged into the condenser and condensed into a liquid. A part of the liquid is evaporated by the above-mentioned evaporator, and the other part of the liquid is injected into the replaced gas-liquid ejector by the remaining high-pressure steam from the generator, and the two fluids are fully mixed. After being a stream, it is sent back to the generator for circulation.
经过试验发现，将循环泵替换为气液引射器虽然降低了制冷系统的制造成本，但是，当发生器处于不同的低品位热源时，制冷系统的制冷效率不同，而且经常会出现制冷系统难以运行的问题。发明人进行了深入研究，发现，该制冷系统中采用一个发生器，即该发生器的蒸汽出口分别与气体喷射器和气液引射器的入口连通，也就是气体喷射器和气液引射器的高压蒸汽入口处，高压蒸汽的温度和压力是一样的，而气体喷射器引射的是具有较低温度的蒸汽，气液引射器引射的是具有较高温度的液体，而且蒸汽和液体的压力也不同。所以，相同温度和压力的高压蒸汽引射不同温度、不同压力以及不同相态的制冷剂时，在不同工况下，容易导致气液引射器运行不稳定，乃至失效。而且，制冷系统无法根据不同的工况进行自主调节，难以提高制冷效率和运行的稳定性。After testing, it is found that although the manufacturing cost of the refrigeration system is reduced by replacing the circulation pump with the gas-liquid ejector, when the generator is in different low-grade heat sources, the refrigeration efficiency of the refrigeration system is different, and often the refrigeration system is difficult. running problems. The inventor conducted in-depth research and found that a generator is used in the refrigeration system, that is, the steam outlet of the generator communicates with the inlets of the gas ejector and the gas-liquid ejector respectively, that is, the gas ejector and the gas-liquid ejector. At the inlet of high-pressure steam, the temperature and pressure of high-pressure steam are the same, while the gas ejector ejects steam with a lower temperature, and the gas-liquid ejector ejects liquid with a higher temperature, and the steam and liquid The pressure is also different. Therefore, when high-pressure steam at the same temperature and pressure injects refrigerants of different temperatures, pressures, and phases, under different working conditions, the gas-liquid ejector may run unstable or even fail. Moreover, the refrigeration system cannot be adjusted independently according to different working conditions, and it is difficult to improve refrigeration efficiency and operation stability.
发明人针对上述技术问题，又进行了研发，得到了本申请的技术方案。本发明的目的是提供一种无泵喷射式制冷系统和制冷方法。该制冷系统以另一热源驱动的气液喷射器代替了传统的循环泵，减少了系统的运动部件，从而使系统变为被动式系统，减少了系统中电能的消耗，提高了制冷效率，更加充分地利用了低品位能源，降低了系统造价，提高了系统的经济性。In view of the above technical problems, the inventor has carried out research and development, and obtained the technical solution of the present application. The object of the present invention is to provide a pumpless injection refrigeration system and refrigeration method. The refrigeration system replaces the traditional circulation pump with a gas-liquid ejector driven by another heat source, which reduces the moving parts of the system, thus making the system a passive system, reducing the power consumption in the system, improving the cooling efficiency, and making it more fully It makes full use of low-grade energy, reduces the system cost, and improves the economy of the system.
为了解决以上技术问题，本发明的技术方案为：In order to solve the above technical problems, the technical solution of the present invention is:
一种无泵喷射式制冷系统，包括第一发生器、气体喷射器、冷凝器、蒸发器、第二发生器和气液引射器，其中，第一发生器的出口与气体喷射器的引射蒸汽入口连接，气体喷射器的出口与冷凝器的入口连接，冷凝器的出口分为两个支路，一个支路通过蒸发器与气体喷射器的蒸汽入口连接；另一支路与气液引射器的液体入口连接；气液引射器的出口分为两个支路，一个支路与第一发生器的入口连接，另一个支路与第二发生器的入口连接，第二发生器的出口与气液引射器的蒸汽入口连接。A pumpless ejector refrigeration system, comprising a first generator, a gas ejector, a condenser, an evaporator, a second generator and a gas-liquid ejector, wherein the outlet of the first generator is connected to the ejector of the gas ejector The steam inlet is connected, the outlet of the gas ejector is connected with the inlet of the condenser, and the outlet of the condenser is divided into two branches, one branch is connected with the steam inlet of the gas ejector through the evaporator; the other branch is connected with the gas-liquid guide The liquid inlet of the ejector is connected; the outlet of the gas-liquid ejector is divided into two branches, one branch is connected with the inlet of the first generator, the other branch is connected with the inlet of the second generator, and the second generator The outlet of the gas-liquid ejector is connected with the steam inlet.
该制冷系统中，将传统的喷射式制冷系统中的循环泵替换为气液引射器，并针对气液引射器单独设置第二发生器，使独立控制气体喷射器和气液引射器的入口高温高压蒸汽的压力和温度成为可能。两个发生器的蒸汽出口的温度和压力不相同，可以根据工况及时控制调整第二发生器出口的蒸汽温度、压力和流量，使得气液引射器能稳定运行，并且气液引射器入口处的蒸汽具有足够的温度、压力和流量，可以提供足够的动力，进而提高了制冷系统整体的制冷效率。In this refrigeration system, the circulation pump in the traditional ejector refrigeration system is replaced by a gas-liquid ejector, and a second generator is set separately for the gas-liquid ejector, so that the independent control of the gas ejector and the gas-liquid ejector The pressure and temperature of the inlet high temperature and high pressure steam become possible. The temperature and pressure of the steam outlets of the two generators are different, and the temperature, pressure and flow of the steam at the outlet of the second generator can be controlled and adjusted in time according to the working conditions, so that the gas-liquid ejector can run stably, and the gas-liquid ejector The steam at the inlet has sufficient temperature, pressure and flow, which can provide sufficient power, thereby improving the overall refrigeration efficiency of the refrigeration system.
进一步的，气液引射器与第二发生器连接的支路上，气液引射器与第二发生器之间设置有止回阀。止回阀可以防止这一支路中的流体回流到喷射器中，保证了气液引射器的稳定运行。Further, on the branch connecting the gas-liquid ejector to the second generator, a check valve is provided between the gas-liquid ejector and the second generator. The check valve can prevent the fluid in this branch from flowing back into the injector, ensuring the stable operation of the gas-liquid ejector.
进一步的，气液引射器与第一发生器和第二发生器之间的管路上均设置有压力调节阀。压力调节阀可以调整两个管路中的压力，使得制冷系统能够稳定工作。Further, pressure regulating valves are arranged on the pipelines between the gas-liquid ejector and the first generator and the second generator. The pressure regulating valve can adjust the pressure in the two pipelines so that the refrigeration system can work stably.
更进一步的，所述压力调节阀设置于止回阀和第二发生器之间。流经止回阀的流体即为进入第二发生器中的流体，只有对止回阀下游的管路进行压力调节，才能真正体现对第二发生器所在管路的压力调节。Furthermore, the pressure regulating valve is arranged between the check valve and the second generator. The fluid flowing through the check valve is the fluid entering the second generator. Only by adjusting the pressure of the pipeline downstream of the check valve can the pressure regulation of the pipeline where the second generator is located be truly reflected.
进一步的，冷凝器与蒸发器之间的管路上设置有节流阀。节流阀可以通过改变节流截面或节流长度以控制管路流体的流量，可以对流体进行节流降温。Further, a throttling valve is arranged on the pipeline between the condenser and the evaporator. The throttling valve can control the flow of pipeline fluid by changing the throttling section or throttling length, and can throttle and cool down the fluid.
利用上述无泵喷射式制冷系统进行的制冷方法，包括如下步骤：The refrigerating method carried out by utilizing the above-mentioned pumpless ejector refrigerating system comprises the following steps:
第一发生器中的制冷剂吸热变为过热蒸汽，进入气体喷射器中引射来自蒸发器的制冷剂蒸汽，将其增压后共同进入冷凝器，在冷凝器中冷凝为液体；从冷凝器中流出的液体一部分进入所述蒸发器加热，另一部分进入气液引射器，被来自第二发生器的过热蒸汽引射后增压，经过增压后的混合流体(液态)一部分返回第一发生器中循环，另一部分进入第二发生器中，经加热后成为用于引射液体的过热蒸汽。The refrigerant in the first generator absorbs heat and turns into superheated steam, which enters the gas ejector to inject refrigerant steam from the evaporator, pressurizes it, and enters the condenser together, where it condenses into a liquid; Part of the liquid flowing out of the generator enters the evaporator for heating, and the other part enters the gas-liquid ejector, and is pressurized after being ejected by the superheated steam from the second generator, and part of the pressurized mixed fluid (liquid state) returns to the first generator. The first part circulates in the generator, and the other part enters the second generator, and becomes superheated steam for injecting liquid after being heated.
本发明的有益效果为：The beneficial effects of the present invention are:
该制冷系统中，将传统的喷射式制冷系统中的循环泵替换为气液引射器，并针对气液引射器单独设置第二发生器，使独立控制气体喷射器和气液引射器的入口高温高压蒸汽的压力和温度成为可能。两个发生器的蒸汽出口的温度和压力不相同，可以根据工况及时控制调整第二发生器出口的蒸汽温度、压力和流量，使得气液引射器能稳定运行，并且气液引射器入口处的蒸汽具有足够的温度、压力和流量，可以提供足够的动力，进而提高了制冷系统整体的制冷效率。In this refrigeration system, the circulation pump in the traditional ejector refrigeration system is replaced by a gas-liquid ejector, and a second generator is set separately for the gas-liquid ejector, so that the independent control of the gas ejector and the gas-liquid ejector The pressure and temperature of the inlet high temperature and high pressure steam become possible. The temperature and pressure of the steam outlets of the two generators are different, and the temperature, pressure and flow of the steam at the outlet of the second generator can be controlled and adjusted in time according to the working conditions, so that the gas-liquid ejector can operate stably, and the gas-liquid ejector The steam at the inlet has sufficient temperature, pressure and flow, which can provide sufficient power, thereby improving the overall refrigeration efficiency of the refrigeration system.
附图说明Description of drawings
图1为本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
其中，1、第一发生器；2、气体喷射器；3、冷凝器；4、节流阀；5、蒸发器；6、气液引射器；7、第二发生器；8、第一压力调节阀；9、止回阀；10、第二压力调节阀。Among them, 1. First generator; 2. Gas injector; 3. Condenser; 4. Throttle valve; 5. Evaporator; 6. Gas-liquid ejector; 7. Second generator; 8. First Pressure regulating valve; 9. Check valve; 10. Second pressure regulating valve.
具体实施方式Detailed ways
应该指出，以下详细说明都是例示性的，旨在对本申请提供进一步的说明。除非另有指明，本文使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.
止回阀，又称单向阀或逆止阀，其作用是防止管路中的介质倒流。Check valve, also known as one-way valve or check valve, its function is to prevent the medium in the pipeline from flowing backward.
压力调节阀，亦称自力式平衡阀、流量控制阀、流量控制器、动态平衡阀、流量平衡阀等，是一种直观简便的流量调节控制装置。Pressure regulating valve, also known as self-operated balancing valve, flow control valve, flow controller, dynamic balancing valve, flow balancing valve, etc., is an intuitive and simple flow regulating control device.
节流阀是通过改变节流截面或节流长度以控制流体流量的阀门。A throttle valve is a valve that controls fluid flow by changing the throttle section or throttle length.
如图1所示，一种无泵喷射式制冷系统，包括第一发生器1、气体喷射器2、冷凝器3、蒸发器5、第二发生器7和气液引射器6，其中，第一发生器1的出口与气体喷射器2的引射蒸汽入口连接，气体喷射器2的出口与冷凝器3的入口连接，冷凝器3的出口分为两个支路，一个支路通过节流阀4、蒸发器5与气体喷射器2的蒸汽入口连接；另一支路与气液引射器6的液体入口连接；气液引射器6的出口分为两个支路，一个支路与第一发生器1的入口连接，第一发生器1与气液引射器6之间的支路上设置有第二压力调节阀10，另一个支路与第二发生器7的入口连接，第二发生器7的出口与气液引射器6的蒸汽入口连接，第二发生器7气液引射器6之间的支路上设置有止回阀9和第一压力调节阀8。As shown in Figure 1, a pumpless ejector refrigeration system includes a first generator 1, a gas ejector 2, a condenser 3, an evaporator 5, a second generator 7 and a gas-liquid ejector 6, wherein the first The outlet of generator 1 is connected to the injection steam inlet of gas injector 2, the outlet of gas injector 2 is connected to the inlet of condenser 3, and the outlet of condenser 3 is divided into two branches, one of which is throttling The valve 4 and the evaporator 5 are connected to the steam inlet of the gas injector 2; the other branch is connected to the liquid inlet of the gas-liquid ejector 6; the outlet of the gas-liquid ejector 6 is divided into two branches, one branch It is connected to the inlet of the first generator 1, a second pressure regulating valve 10 is arranged on the branch between the first generator 1 and the gas-liquid ejector 6, and the other branch is connected to the inlet of the second generator 7, The outlet of the second generator 7 is connected to the steam inlet of the gas-liquid ejector 6 , and the branch between the gas-liquid ejectors 6 of the second generator 7 is provided with a check valve 9 and a first pressure regulating valve 8 .
实施例1Example 1
如果采用R134a为制冷剂，制冷剂在第一发生器1中被工业余热(温度为：120℃)加热变为过热蒸汽，过热蒸汽的温度为90℃，压力为2.8MPa。进入气体喷射器2抽吸来自蒸发器5的制冷剂蒸汽，将其增压后共同进入冷凝器3，在冷凝器3中被冷凝成液体，液体的温度为45℃。从冷凝器3中流出来的液体一部分经节流阀4节流降温后进入蒸发器5，另外一部分液体被来自发生器7的蒸汽在气液引射器6中引射增压，这两部分的液体的体积比为1:2.5。冷凝器3中流出的部分液体，经气液引射器6增压后压力为2.85MPa。增压后为液体；分为两路，一路经压力调节阀10进入第一发生器1，另一路经止回阀9和第一压力调节阀8进入第二发生器7重新吸热蒸发，得到过热蒸汽，过热蒸汽的温度为100℃，压力为2.5MPa；进入第一发生器1的流体流量与进入第二发生器7的液体流量的体积比为20：1。第一压力调节阀8和第二压力调节阀10的作用在于调整两个管路的压力使得系统能够稳定工作。止回阀9的作用在于防止这一路的流体回流到喷射器。采用该方法的制冷效率为0.3。If R134a is used as the refrigerant, the refrigerant is heated by industrial waste heat (temperature: 120°C) in the first generator 1 to become superheated steam, the temperature of the superheated steam is 90°C, and the pressure is 2.8MPa. The gas injector 2 sucks the refrigerant vapor from the evaporator 5, pressurizes it and enters the condenser 3 together, where it is condensed into a liquid, and the temperature of the liquid is 45°C. Part of the liquid flowing out of the condenser 3 enters the evaporator 5 after being throttled and cooled by the throttle valve 4, and the other part of the liquid is injected and pressurized in the gas-liquid ejector 6 by the steam from the generator 7. The volume ratio of the liquid is 1:2.5. Part of the liquid flowing out of the condenser 3 has a pressure of 2.85 MPa after being pressurized by the gas-liquid ejector 6 . After pressurization, it becomes liquid; it is divided into two paths, one path enters the first generator 1 through the pressure regulating valve 10, and the other path enters the second generator 7 through the check valve 9 and the first pressure regulating valve 8 to absorb heat and evaporate again, and obtain Superheated steam, the temperature of the superheated steam is 100°C, the pressure is 2.5MPa; the volume ratio of the fluid flow entering the first generator 1 to the liquid flow entering the second generator 7 is 20:1. The function of the first pressure regulating valve 8 and the second pressure regulating valve 10 is to adjust the pressure of the two pipelines so that the system can work stably. The function of the check valve 9 is to prevent the fluid in this path from flowing back to the injector. The refrigeration efficiency using this method is 0.3.
实施例2Example 2
如果采用HFO-1234ze(E)为制冷剂，制冷剂在第一发生器1中被工业余热(温度为：80℃)加热变为过热蒸汽，过热蒸汽的温度为55.7℃，压力为1.15MPa。进入气体喷射器2抽吸来自蒸发器5的制冷剂蒸汽，将其增压后共同进入冷凝器3，在冷凝器3中被冷凝成液体，液体的温度为24℃。从冷凝器3中流出来的液体一部分经节流阀4节流降温后进入蒸发器5，另外一部分液体被来自发生器7的蒸汽在气液引射器6中引射增压，这两部分的液体的体积比为1:2.5。冷凝器3中流出的部分液体，经气液引射器6增压后压力为1.15MPa。增压后为液体；分为两路，一路经压力调节阀10进入第一发生器1，另一路经止回阀9和第一压力调节阀8进入第二发生器7重新吸热蒸发，得到过热蒸汽，过热蒸汽的温度为70℃，压力为1.15MPa；进入第一发生器1的流体流量与进入第二发生器7的液体流量的体积比为20：1。第一压力调节阀8和第二压力调节阀10的作用在于调整两个管路的压力使得系统能够稳定工作。止回阀9的作用在于防止这一路的流体回流到喷射器。采用该方法的制冷效率为0.33。If HFO-1234ze(E) is used as the refrigerant, the refrigerant is heated by industrial waste heat (temperature: 80°C) in the first generator 1 to become superheated steam, the temperature of the superheated steam is 55.7°C, and the pressure is 1.15MPa. The gas injector 2 sucks the refrigerant vapor from the evaporator 5, pressurizes it, and enters the condenser 3 together, where it is condensed into a liquid, and the temperature of the liquid is 24°C. Part of the liquid flowing out of the condenser 3 enters the evaporator 5 after being throttled and cooled by the throttle valve 4, and the other part of the liquid is injected and pressurized in the gas-liquid ejector 6 by the steam from the generator 7. The volume ratio of the liquid is 1:2.5. Part of the liquid flowing out of the condenser 3 has a pressure of 1.15 MPa after being pressurized by the gas-liquid ejector 6 . After pressurization, it becomes liquid; it is divided into two paths, one path enters the first generator 1 through the pressure regulating valve 10, and the other path enters the second generator 7 through the check valve 9 and the first pressure regulating valve 8 to absorb heat and evaporate again, and obtain Superheated steam, the temperature of the superheated steam is 70°C, and the pressure is 1.15MPa; the volume ratio of the fluid flow entering the first generator 1 to the liquid flow entering the second generator 7 is 20:1. The function of the first pressure regulating valve 8 and the second pressure regulating valve 10 is to adjust the pressure of the two pipelines so that the system can work stably. The function of the check valve 9 is to prevent the fluid in this path from flowing back to the injector. The refrigeration efficiency using this method is 0.33.
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.
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