WO2023005155A1 - Multi-compressor one-pass segmented compression type water chiller - Google Patents

Multi-compressor one-pass segmented compression type water chiller Download PDF

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Publication number
WO2023005155A1
WO2023005155A1 PCT/CN2022/070417 CN2022070417W WO2023005155A1 WO 2023005155 A1 WO2023005155 A1 WO 2023005155A1 CN 2022070417 W CN2022070417 W CN 2022070417W WO 2023005155 A1 WO2023005155 A1 WO 2023005155A1
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WIPO (PCT)
Prior art keywords
evaporator
segmental
condenser
combined
compressor
Prior art date
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PCT/CN2022/070417
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French (fr)
Chinese (zh)
Inventor
蒋家祺
薛中柱
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江苏区宇能源有限公司
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Application filed by 江苏区宇能源有限公司 filed Critical 江苏区宇能源有限公司
Priority to EP22732374.8A priority Critical patent/EP4148347A4/en
Priority to US17/789,521 priority patent/US20230324083A1/en
Publication of WO2023005155A1 publication Critical patent/WO2023005155A1/en

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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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • 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
    • F25B31/00—Compressor arrangements
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/02—Compressor arrangements of motor-compressor units
    • F25B31/026—Compressor arrangements of motor-compressor units with compressor of rotary type
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/024—Evaporators with refrigerant in a vessel in which is situated a heat exchanger
    • F25B2339/0242—Evaporators with refrigerant in a vessel in which is situated a heat exchanger having tubular elements
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/06—Several compression cycles arranged in parallel

Definitions

  • the invention relates to the technical field of chillers, in particular to a multi-head, single-return segmental compression chiller.
  • the current chillers use the cooling capacity as the primary parameter, and then determine the rated chilled water flow rate based on the rated supply and return water temperature. There is a relatively fixed relationship between the cooling capacity and the chilled water flow rate, and the chilled water flow rate is not based on It is determined by the flow rate required at the end of the project. During the operation of the chiller, the cooling capacity and the chilled water flow are often inconsistent. Specifically, under a certain load condition, the cooling capacity of a single chiller can meet the cooling capacity demand of the terminal, but the flow provided by the chiller cannot Satisfy the flow demand at the end. Because chilled water is the carrier of cold energy, insufficient chilled water flow means that there is no cold energy in some areas, and there is no comfort effect.
  • the present invention provides a multi-head single-return segmental compression chiller, which includes a combined condenser and a combined evaporator, and the combined condenser is sequentially connected by several segmental condensers
  • the combined condenser is equipped with a condenser tube bundle for use by all segmental condensers.
  • the combined evaporator is composed of several segmental evaporators connected in sequence.
  • the combined evaporator An evaporator tube bundle is provided inside for use by all segmental evaporators, the segmental condensers and segmental evaporators are in one-to-one correspondence, and a compressor is connected between the corresponding segmental condensers and segmental evaporators , the compressor, segmental condenser and segmental evaporator form a refrigeration function segment.
  • the refrigerating functional section also includes a throttling device, the throttling device is respectively connected to the segmental condenser and the segmental evaporator, and the throttling device is a decompression device between the condenser and the evaporator of the chiller .
  • the two ends of the combined condenser are the condenser inlet and the condenser outlet respectively
  • the two ends of the combined evaporator are the evaporator inlet and the evaporator outlet respectively
  • the condenser outlet and the evaporator inlet are Located on the same side, the cooling water in the condenser and the chilled water in the evaporator can run convectively, which improves the operating efficiency.
  • the compressor is combined with a centrifugal compressor, a magnetic levitation compressor, or a screw compressor. According to the requirements of refrigeration conditions, a specific combination can be selected so that the overall power of the compressor meets the refrigeration requirements. Guaranteed cooling effect.
  • the design principle of the present invention is: design the overall structure of the condenser and the overall structure of the evaporator into segmented structures, and through the setting of compressors and throttling devices, a plurality of refrigerating functional segments that can operate independently are formed. Demand, corresponding to the number of operation of the selected refrigeration function section, so as to ensure that each compressor participating in the operation is in an efficient operation state under the condition of providing the corresponding cooling capacity.
  • the present invention calculates and determines the appropriate chilled water flow, so that the chilled pump can maintain sufficient chilled water flow at the end with low energy consumption, so that the chilled water can be used as the carrier of cooling capacity continuously and efficiently. Adequate distribution in all areas of the project end.
  • the present invention designs choose compressor power or form (such as centrifugal compressor, magnetic levitation compressor, or screw compressor) for combined use.
  • the present invention has the following advantages:
  • the cooling capacity and chilled water flow rate can be independently controlled according to actual needs, which solves the problem that the cooling capacity and chilled water flow rate of existing chillers are difficult to match, thus ensuring the use effect of the chiller unit and improving the comfort of use sex.
  • the operating quantity of the cooling function section can be selected. Under the condition of ensuring the required cooling capacity, each compressor participating in the operation can be in a high-efficiency operating state, thereby improving the operating efficiency of the chiller.
  • Fig. 1 is a structural schematic diagram of the present invention.
  • this embodiment provides a multi-head single-return segmental compression chiller, including a combined condenser 7 and a combined evaporator 8, and the combined condenser 7 consists of four segmental condensers in sequence
  • the two ends of the combined condenser 7 are the condenser inlet 51 and the condenser outlet 52 respectively, and the four segmental condensers are respectively the first segmental condenser 11 from the condenser inlet 51 to the condenser outlet 52 , the second segmental condenser 21, the third segmental condenser 31 and the fourth segmental condenser 41
  • the combined condenser 7 is provided with a condenser tube bundle 1 for common use by four segmental condensers, combined
  • the evaporator 8 is composed of four segmented evaporators connected sequentially.
  • the two ends of the combined evaporator 8 are the evaporator inlet 61 and the evaporator outlet 62 respectively.
  • the four segmented evaporators are from the evaporator outlet 62 to the evaporator.
  • the device inlet 61 is respectively the first subsection evaporator 21, the second subsection evaporator 22, the third subsection evaporator 23 and the fourth subsection evaporator 24, and the combined evaporator 8 is provided with an evaporator tube bundle 2.
  • the condenser outlet 52 and the evaporator inlet 61 are located on the same side.
  • the first compressor 31 and the first throttling device 41 are respectively connected through pipelines between the first segment condenser 11 and the first segment evaporator 21, thus forming the first refrigeration function segment;
  • a second compressor 32 and a second throttling device 42 are respectively connected by pipelines, so that the second refrigeration function section is formed;
  • the third stage condenser 31 and the third section evaporator 23 are respectively connected with the third compressor 33 and the third throttling device 43 through pipelines, thus forming the third refrigeration function section;
  • a fourth compressor 34 and a fourth throttling device 44 are respectively connected between the stage evaporators 24 through pipelines, thus forming a fourth refrigeration function stage.
  • the first compressor 31, the second compressor 32, the third compressor 33 and the fourth compressor 34 are respectively a magnetic levitation compressor, a centrifugal compressor, a centrifugal compressor and a centrifugal compressor.
  • the automatic control system of the refrigerator will give priority to the operation of the magnetic levitation compressor; when the cooling load is high , when the environmental conditions are conducive to the efficient operation of the centrifugal compressor, the centrifugal compressor is given priority to start and run through the automatic control system of the chiller.
  • the overall power of the compressor can match the upper cooling load, so that the cooling capacity can be controlled more precisely.
  • the water chiller provided in Example 1 is used as an example.
  • the lengths of the condenser tube bundle 1 and the evaporator tube bundle 2 in the chiller in Example 1 are determined, that is, the cooling function
  • the number of sections, four refrigeration function sections are selected in this embodiment.
  • the first compressor 31 is in an efficient operation state, and the operation of the first refrigeration functional section generates corresponding cooling capacity to meet the cooling capacity demand of the terminal.
  • the chilled water flow generated in the evaporator tube bundle 2 It can also meet the needs of the end.
  • the multi-head single-return segmental compression chiller provided by the present invention can not only meet and adapt to the changing demand for cooling capacity, but also can maintain a sufficient amount of chilled water flow to ensure that the chiller
  • the good and stable use effect ensures a good user experience effect.
  • the chiller ensures that the compressors participating in the operation are always in a high-efficiency operation state during the operation process, thereby improving The overall operating efficiency of the chiller.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

A multi-compressor one-pass segmented compression type water chiller, comprising a combined condenser (7) and a combined evaporator (8). The combined condenser (7) is formed by sequentially connecting and combining a plurality of segmented condensers (11, 21, 31, 41), and a condenser tube bundle (1) is provided in the combined condenser (7) for use by all the segmented condensers (11, 21, 31, 41). The combined evaporator (8) is formed by sequentially connecting and combining a plurality of segmented evaporators (21, 22, 23, 24), and an evaporator tube bundle (2) is provided in the combined evaporator (8) for use by all the segmented evaporators (21, 22, 23, 24). The segmented condensers (11, 21, 31, 41) are in one-to-one correspondence with the segmented evaporators (21, 22, 23, 24). Compressors (31, 32, 33, 34) are connected between the segmented condensers (11, 21, 31, 41) and the segmented evaporators (21, 22, 23, 24) which correspond to each other. The compressor (31, 32, 33, 34), the segmented condensers (11, 21, 31, 41) and the segmented evaporators (21, 22, 23, 24) form a refrigeration function segment. The refrigerating capacity and the chilled water flow can both be independently controlled according to actual needs, thereby solving the problem in the existing water chillers that it is difficult to achieve matching of the refrigerating capacity and the chilled water flow.

Description

一种多机头单回程分段压缩式冷水机组A multi-head single-return segmental compression chiller 技术领域technical field
本发明涉及冷水机组技术领域，具体涉及一种多机头单回程分段压缩式冷水机组。The invention relates to the technical field of chillers, in particular to a multi-head, single-return segmental compression chiller.
背景技术Background technique
目前的冷水机组，都是以制冷量为首要参数，然后以额定的供回水温度确定额定冷冻水流量，其冷量和冷冻水流量是一个比较固定的关系，而该冷冻水流量并不是根据项目末端需要的流量而确定。冷水机组在运行中，经常出现冷量与冷冻水流量不协调的情况，具体的，在某个负荷条件下，单台冷机的冷量能满足末端冷量需求，但冷机提供的流量不能满足末端的流量需求。因为冷冻水是冷量的载体，冷冻水流量不足意味着某些区域没有冷量，也就没有舒适的效果。这种情况下，若增加冷机运行，因为单台冷机已经能满足冷量需求，增加冷机则各冷机均处于低效率的低负荷状况，运行效率偏低；若不增加冷机，一般会加大水泵输出，以更大的扬程损耗使冷机提供大于额定流量的冷冻水，但这样操作，冷机内冷冻水流速过快，运行效率也会降低。因此，在大部分运行时间内，冷机的冷冻水流量都处于一种与冷量不匹配的情况，造成冷机的效率始终处于偏低的状态。The current chillers use the cooling capacity as the primary parameter, and then determine the rated chilled water flow rate based on the rated supply and return water temperature. There is a relatively fixed relationship between the cooling capacity and the chilled water flow rate, and the chilled water flow rate is not based on It is determined by the flow rate required at the end of the project. During the operation of the chiller, the cooling capacity and the chilled water flow are often inconsistent. Specifically, under a certain load condition, the cooling capacity of a single chiller can meet the cooling capacity demand of the terminal, but the flow provided by the chiller cannot Satisfy the flow demand at the end. Because chilled water is the carrier of cold energy, insufficient chilled water flow means that there is no cold energy in some areas, and there is no comfort effect. In this case, if you increase the operation of chillers, because a single chiller can already meet the demand for cooling capacity, if you add chillers, each chiller will be in a low-efficiency low-load condition, and the operating efficiency will be low; if you do not increase the chiller, Generally, the output of the water pump is increased to make the chiller provide chilled water greater than the rated flow rate with greater head loss, but in this way, the chilled water flow rate in the chiller is too fast, and the operating efficiency will also be reduced. Therefore, during most of the running time, the chilled water flow of the chiller does not match the cooling capacity, resulting in a low efficiency of the chiller.
所以需要一个新的技术方案来解决这个问题。So a new technical solution is needed to solve this problem.
发明内容Contents of the invention
发明目的：为了克服现有技术中存在的冷机的冷冻水流量和冷量难以实现匹配的问题，提供一种多机头单回程分段压缩式冷水机组，其能够实现冷量与冷冻水流量的各自独立选配组合，同时满足冷量与冷冻水流量的使用需求，提升了冷水机组的使用效果。Purpose of the invention: In order to overcome the problem in the prior art that the chilled water flow and cooling capacity of the chiller are difficult to match, a multi-head single-return segmental compression chiller is provided, which can realize the cooling capacity and chilled water flow rate The respective independent matching combinations meet the requirements of cooling capacity and chilled water flow, and improve the use effect of the chiller.
技术方案：为实现上述目的，本发明提供一种多机头单回程分段压缩式冷水机组，包括组合式冷凝器和组合式蒸发器，所述组合式冷凝器由若干分段冷凝器依次连接组合而成，所述组合式冷凝器内设置有冷凝器管束用于供所有分段冷凝器使用，所述组合式蒸发器由若干分段蒸发器依次连接组合而成，所述组合式蒸发器内设置有蒸发器管束用于供所有分段蒸发器使用，所述分段冷凝器和分段蒸发器一一对应，相互对应的分段冷凝器和分段蒸发器之间连接设置有压缩机，压缩机、分段冷凝器和分段蒸发器形成制冷功能段。Technical solution: In order to achieve the above purpose, the present invention provides a multi-head single-return segmental compression chiller, which includes a combined condenser and a combined evaporator, and the combined condenser is sequentially connected by several segmental condensers The combined condenser is equipped with a condenser tube bundle for use by all segmental condensers. The combined evaporator is composed of several segmental evaporators connected in sequence. The combined evaporator An evaporator tube bundle is provided inside for use by all segmental evaporators, the segmental condensers and segmental evaporators are in one-to-one correspondence, and a compressor is connected between the corresponding segmental condensers and segmental evaporators , the compressor, segmental condenser and segmental evaporator form a refrigeration function segment.
进一步地，所述制冷功能段还包括节流装置，所述节流装置分别连接着分段冷凝器和分段蒸发器，节流装置是冷水机组在冷凝器和蒸发器之间的减压装置。Further, the refrigerating functional section also includes a throttling device, the throttling device is respectively connected to the segmental condenser and the segmental evaporator, and the throttling device is a decompression device between the condenser and the evaporator of the chiller .
进一步地，所述组合式冷凝器的两端分别为冷凝器入口和冷凝器出口，所述组合式 蒸发器的两端分别为蒸发器入口和蒸发器出口，所述冷凝器出口和蒸发器入口位于同一侧，这样使得冷凝器内的冷却水和蒸发器内的冷冻水能够对流运行，提高了运行效率。Further, the two ends of the combined condenser are the condenser inlet and the condenser outlet respectively, the two ends of the combined evaporator are the evaporator inlet and the evaporator outlet respectively, and the condenser outlet and the evaporator inlet are Located on the same side, the cooling water in the condenser and the chilled water in the evaporator can run convectively, which improves the operating efficiency.
进一步地，所述压缩机选用离心式压缩机、磁悬浮压缩机、或螺杆式压缩机进行组合使用，根据制冷工况的需求，可针对性选用具体组合，使得压缩机的整体功率符合制冷要求，保证了制冷效果。Further, the compressor is combined with a centrifugal compressor, a magnetic levitation compressor, or a screw compressor. According to the requirements of refrigeration conditions, a specific combination can be selected so that the overall power of the compressor meets the refrigeration requirements. Guaranteed cooling effect.
本发明的设计原理为：将冷凝器整体结构和蒸发器整体结构均设计成分段式结构，且通过压缩机和节流装置的设置，形成多个可以独立运行的制冷功能段，可以根据制冷量需求，对应选择制冷功能段的运行数量，从而在提供对应制冷量的情况下，确保了参加运行的每个压缩机处于高效运行状态，与此同时，因为所有分段冷凝器共用一个冷凝器管束，所有分段蒸发器共用一个蒸发器管束，所以制冷量和冷冻水流量实现了相互独立的关系，可根据实际冷冻水流量需求，选择合适的蒸发器管束和冷凝器管束，无论制冷功能段的运行数量和状况，能够始终提供足量的冷冻水流量。The design principle of the present invention is: design the overall structure of the condenser and the overall structure of the evaporator into segmented structures, and through the setting of compressors and throttling devices, a plurality of refrigerating functional segments that can operate independently are formed. Demand, corresponding to the number of operation of the selected refrigeration function section, so as to ensure that each compressor participating in the operation is in an efficient operation state under the condition of providing the corresponding cooling capacity. At the same time, because all the segmental condensers share one condenser tube bundle , all segmental evaporators share one evaporator tube bank, so the cooling capacity and chilled water flow have achieved an independent relationship, and the appropriate evaporator tube bank and condenser tube bank can be selected according to the actual chilled water flow demand, regardless of the cooling function section The number and conditions of operation can always provide sufficient chilled water flow.
本发明根据项目末端***的负荷需求和设备参数，计算确定合适的冷冻水流量，使冷冻泵可以以较低的能耗保持末端充足的冷冻水流量，使冷冻水作为冷量的载体可以持续、充分的分布在项目末端所有区域。According to the load demand and equipment parameters of the terminal system of the project, the present invention calculates and determines the appropriate chilled water flow, so that the chilled pump can maintain sufficient chilled water flow at the end with low energy consumption, so that the chilled water can be used as the carrier of cooling capacity continuously and efficiently. Adequate distribution in all areas of the project end.
本发明根据项目的设计冷负荷，功能业态(如医院、商场、办公楼等功能业态)，所处气候区域(如寒冷地区、夏热冬冷地区、夏热冬暖地区等)等情况，设计选配压缩机功率或形式(如离心式压缩机、磁悬浮压缩机、或螺杆式压缩机)进行组合使用。According to the design cooling load of the project, the functional formats (such as hospitals, shopping malls, office buildings and other functional formats), and the climatic regions (such as cold regions, hot summer and cold winter regions, hot summer and warm winter regions, etc.), the present invention designs Choose compressor power or form (such as centrifugal compressor, magnetic levitation compressor, or screw compressor) for combined use.
有益效果：本发明与现有技术相比，具备如下优点：Beneficial effect: compared with the prior art, the present invention has the following advantages:
1、制冷量和冷冻水流量均能够根据实际需求进行独立控制，解决了现有冷水机组存在的制冷量和冷冻水流量难以实现匹配的问题，从而保证了冷水机组的使用效果，提升了使用舒适性。1. The cooling capacity and chilled water flow rate can be independently controlled according to actual needs, which solves the problem that the cooling capacity and chilled water flow rate of existing chillers are difficult to match, thus ensuring the use effect of the chiller unit and improving the comfort of use sex.
2、能够根据制冷量实际需求，选择制冷功能段的运行数量，在确保提供所需制冷量的情况下，使得参加运行的每个压缩机处于高效运行状态，从而提高了冷水机组的运行效率。2. According to the actual demand of cooling capacity, the operating quantity of the cooling function section can be selected. Under the condition of ensuring the required cooling capacity, each compressor participating in the operation can be in a high-efficiency operating state, thereby improving the operating efficiency of the chiller.
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.
具体实施方式Detailed ways
下面结合附图和具体实施例，进一步阐明本发明，应理解这些实施例仅用于说明本发明而不用于限制本发明的范围，在阅读了本发明之后，本领域技术人员对本发明的各种等价形式的修改均落于本申请所附权利要求所限定的范围。Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.
实施例1：Example 1:
如图1所示，本实施例提供一种多机头单回程分段压缩式冷水机组，包括组合式冷凝器7和组合式蒸发器8，组合式冷凝器7由四个分段冷凝器依次连接组合而成，组合式冷凝器7的两端分别为冷凝器入口51和冷凝器出口52，四个分段冷凝器从冷凝器入口51到冷凝器出口52分别为第一分段冷凝器11、第二分段冷凝器21、第三分段冷凝器31和第四分段冷凝器41，组合式冷凝器7内设置有冷凝器管束1用于供四个分段冷凝器共同使用，组合式蒸发器8由四个分段蒸发器依次连接组合而成，组合式蒸发器8的两端分别为蒸发器入口61和蒸发器出口62，四个分段蒸发器从蒸发器出口62到蒸发器入口61分别为第一分段蒸发器21、第二分段蒸发器22、第三分段蒸发器23和第四分段蒸发器24，组合式蒸发器8内设置有蒸发器管束2用于供四个分段蒸发器共同使用，冷凝器出口52和蒸发器入口61位于同一侧。As shown in Figure 1, this embodiment provides a multi-head single-return segmental compression chiller, including a combined condenser 7 and a combined evaporator 8, and the combined condenser 7 consists of four segmental condensers in sequence The two ends of the combined condenser 7 are the condenser inlet 51 and the condenser outlet 52 respectively, and the four segmental condensers are respectively the first segmental condenser 11 from the condenser inlet 51 to the condenser outlet 52 , the second segmental condenser 21, the third segmental condenser 31 and the fourth segmental condenser 41, the combined condenser 7 is provided with a condenser tube bundle 1 for common use by four segmental condensers, combined The evaporator 8 is composed of four segmented evaporators connected sequentially. The two ends of the combined evaporator 8 are the evaporator inlet 61 and the evaporator outlet 62 respectively. The four segmented evaporators are from the evaporator outlet 62 to the evaporator. The device inlet 61 is respectively the first subsection evaporator 21, the second subsection evaporator 22, the third subsection evaporator 23 and the fourth subsection evaporator 24, and the combined evaporator 8 is provided with an evaporator tube bundle 2. For the common use of four segmented evaporators, the condenser outlet 52 and the evaporator inlet 61 are located on the same side.
本实施例中第一分段冷凝器11和第一分段蒸发器21之间通过管路分别连接有第一压缩机31和第一节流装置41，这样便形成第一制冷功能段；第二分段冷凝器21和第二分段蒸发器22之间通过管路分别连接有第二压缩机32和第二节流装置42，这样便形成第二制冷功能段；第三分段冷凝器31和第三分段蒸发器23之间通过管路分别连接有第三压缩机33和第三节流装置43，这样便形成第三制冷功能段；第四分段冷凝器41和第四分段蒸发器24之间通过管路分别连接有第四压缩机34和第四节流装置44，这样便形成第四制冷功能段。In this embodiment, the first compressor 31 and the first throttling device 41 are respectively connected through pipelines between the first segment condenser 11 and the first segment evaporator 21, thus forming the first refrigeration function segment; Between the two-stage condenser 21 and the second stage evaporator 22, a second compressor 32 and a second throttling device 42 are respectively connected by pipelines, so that the second refrigeration function section is formed; the third stage condenser 31 and the third section evaporator 23 are respectively connected with the third compressor 33 and the third throttling device 43 through pipelines, thus forming the third refrigeration function section; the fourth section condenser 41 and the fourth section A fourth compressor 34 and a fourth throttling device 44 are respectively connected between the stage evaporators 24 through pipelines, thus forming a fourth refrigeration function stage.
本实施例中第一压缩机31、第二压缩机32、第三压缩机33和第四压缩机34分别为磁悬浮压缩机、离心式压缩机、离心式压缩机和离心式压缩机，可根据实际情况，选择磁悬浮压缩机或者离心式压缩机的开启，当冷负荷较低，环境条件利于磁悬浮压缩机高效运行时，通过冷机的自控***，优先启动运行磁悬浮压缩机；当冷负荷较高，环境条件利于离心式压缩机高效运行时，通过冷机的自控***，优先启动运行离心式压缩机。In this embodiment, the first compressor 31, the second compressor 32, the third compressor 33 and the fourth compressor 34 are respectively a magnetic levitation compressor, a centrifugal compressor, a centrifugal compressor and a centrifugal compressor. In the actual situation, choose to start the magnetic levitation compressor or the centrifugal compressor. When the cooling load is low and the environmental conditions are conducive to the efficient operation of the magnetic levitation compressor, the automatic control system of the refrigerator will give priority to the operation of the magnetic levitation compressor; when the cooling load is high , when the environmental conditions are conducive to the efficient operation of the centrifugal compressor, the centrifugal compressor is given priority to start and run through the automatic control system of the chiller.
这样实现了在不同冷负荷情况下，压缩机的整体功率能够匹配上冷负荷，从而使得制冷量能够得到更加精确的控制。In this way, under different cooling load conditions, the overall power of the compressor can match the upper cooling load, so that the cooling capacity can be controlled more precisely.
实施例2：Example 2:
本实施例中将实施例1提供的冷水机组进行实例应用，首先根据实际的冷冻水流量需求，确定实施例1中冷水机组中的冷凝器管束1和蒸发器管束2的长度，也就是制冷功能段的数量，本实施例中选择四个制冷功能段。In this embodiment, the water chiller provided in Example 1 is used as an example. First, according to the actual chilled water flow demand, the lengths of the condenser tube bundle 1 and the evaporator tube bundle 2 in the chiller in Example 1 are determined, that is, the cooling function The number of sections, four refrigeration function sections are selected in this embodiment.
冷水机组在运行过程中，根据末端冷量的需求，具备如下情况：During the operation of the chiller, according to the demand for terminal cooling capacity, the following conditions are met:
情况1：当冷负荷不大于冷水机组额定制冷量25％时，选择只运行第一制冷功能段(也可以是其他三个制冷功能段中的一个)，冷却水从冷凝器入口51进入到冷凝器管束1，从冷凝器出口52流出，然后冷冻水从蒸发器入口61进入到蒸发器管束2，从蒸发器 出口62流出。Situation 1: When the cooling load is not greater than 25% of the rated cooling capacity of the chiller, choose to run only the first cooling function segment (or one of the other three cooling function segments), and the cooling water enters from the condenser inlet 51 to the condenser The evaporator tube bundle 1 flows out from the condenser outlet 52 , and then the chilled water enters the evaporator tube bundle 2 from the evaporator inlet 61 and flows out from the evaporator outlet 62 .
第一制冷功能段在运行的过程中，第一压缩机31处于高效运行状态，第一制冷功能段运行产生对应冷量，满足末端的制冷量需求，另外蒸发器管束2中产生的冷冻水流量也能够满足末端的需求。During the operation of the first refrigeration functional section, the first compressor 31 is in an efficient operation state, and the operation of the first refrigeration functional section generates corresponding cooling capacity to meet the cooling capacity demand of the terminal. In addition, the chilled water flow generated in the evaporator tube bundle 2 It can also meet the needs of the end.
情况2：当冷负荷大于冷水机组额定制冷量的25％，且不大于50％时，选择运行第一制冷功能段和第二制冷功能段(只要是四个制冷功能段中的两个)，冷却水和冷冻水的运行过程和情况1一样，第一制冷功能段和第二制冷功能段的同时运行，产生对应冷量，满足末端的制冷量需求，另外蒸发器管束2中产生的冷冻水流量也能够满足末端的需求。Situation 2: When the cooling load is greater than 25% and not greater than 50% of the rated cooling capacity of the chiller, choose to run the first cooling function segment and the second cooling function segment (as long as it is two of the four cooling function segments), The operation process of cooling water and chilled water is the same as in case 1. The simultaneous operation of the first refrigeration function segment and the second refrigeration function segment generates corresponding cooling capacity to meet the cooling capacity demand at the end. In addition, the chilled water generated in the evaporator tube bundle 2 The flow can also meet the needs of the terminal.
情况3：当冷负荷大于冷水机组额定制冷量的50％，且不大于75％时，运行四个制冷功能段中的3个，产生对应冷量，满足末端的制冷量需求，另外蒸发器管束2中产生的冷冻水流量也能够满足末端的需求。Situation 3: When the cooling load is greater than 50% and not greater than 75% of the rated cooling capacity of the chiller, run 3 of the four refrigeration function sections to generate corresponding cooling capacity to meet the cooling capacity demand at the end. In addition, the evaporator tube bundle The chilled water flow generated in 2 can also meet the demand of the terminal.
情况4：当冷负荷大于冷水机组额定制冷量的75％时，同时运行四个制冷功能段，产生对应冷量，满足末端的制冷量需求，另外蒸发器管束2中产生的冷冻水流量也能够满足末端的需求。Situation 4: When the cooling load is greater than 75% of the rated refrigerating capacity of the chiller, four refrigerating functional sections are operated at the same time to generate the corresponding refrigerating capacity to meet the cooling capacity demand at the end. In addition, the chilled water flow generated in the evaporator tube bundle 2 can also be Meet the needs of the end.
根据本实施例上述内容可见，本发明提供的多机头单回程分段压缩式冷水机组，不但能够满足和适应变化中的制冷量需求，而且能够保持提供足量的冷冻水流量，确保冷水机组的良好、稳定的使用效果，保证了良好的用户体验效果，另外，该冷水机组在实现上述两点的基础上，保证了运行过程中，参与运行的压缩机始终处于高效运行状态，从而提高了冷水机组的整体运行效率。According to the above content of this embodiment, it can be seen that the multi-head single-return segmental compression chiller provided by the present invention can not only meet and adapt to the changing demand for cooling capacity, but also can maintain a sufficient amount of chilled water flow to ensure that the chiller The good and stable use effect ensures a good user experience effect. In addition, on the basis of realizing the above two points, the chiller ensures that the compressors participating in the operation are always in a high-efficiency operation state during the operation process, thereby improving The overall operating efficiency of the chiller.

Claims (4)

  1. 一种多机头单回程分段压缩式冷水机组，其特征在于，包括组合式冷凝器和组合式蒸发器，所述组合式冷凝器由若干分段冷凝器依次连接组合而成，所述组合式冷凝器内设置有冷凝器管束用于供所有分段冷凝器使用，所述组合式蒸发器由若干分段蒸发器依次连接组合而成，所述组合式蒸发器内设置有蒸发器管束用于供所有分段蒸发器使用，所述分段冷凝器和分段蒸发器一一对应，相互对应的分段冷凝器和分段蒸发器之间连接设置有压缩机，压缩机、分段冷凝器和分段蒸发器形成制冷功能段。A multi-head single-return segmental compression chiller is characterized in that it includes a combined condenser and a combined evaporator, and the combined condenser is formed by sequentially connecting and combining several segmental condensers. Condenser tube bundles are provided in the condenser for use by all segmental condensers. The combined evaporator is composed of several segmental evaporators sequentially connected and combined. The combined evaporator is provided with evaporator tube bundles. For use with all segmental evaporators, the segmental condensers and segmental evaporators are in one-to-one correspondence, and a compressor is connected between the corresponding segmental condensers and segmental evaporators, and the compressor, segmental condensing The evaporator and the segmented evaporator form a refrigeration function segment.
  2. 根据权利要求1所述的一种多机头单回程分段压缩式冷水机组，其特征在于，所述制冷功能段还包括节流装置，所述节流装置分别连接着分段冷凝器和分段蒸发器。A multi-head single-return segmental compression chiller according to claim 1, wherein the refrigerating functional segment further includes a throttling device, and the throttling device is respectively connected to the segmental condenser and the sub-stage condenser. section evaporator.
  3. 根据权利要求1所述的一种多机头单回程分段压缩式冷水机组，其特征在于，所述组合式冷凝器的两端分别为冷凝器入口和冷凝器出口，所述组合式蒸发器的两端分别为蒸发器入口和蒸发器出口，所述冷凝器出口和蒸发器入口位于同一侧。A multi-head single-return segmental compression chiller according to claim 1, wherein the two ends of the combined condenser are respectively the condenser inlet and the condenser outlet, and the combined evaporator The two ends of the evaporator are respectively the evaporator inlet and the evaporator outlet, and the condenser outlet and the evaporator inlet are located on the same side.
  4. 根据权利要求1所述的一种多机头单回程分段压缩式冷水机组，其特征在于，所述压缩机选用离心式压缩机、磁悬浮压缩机、或螺杆式压缩机进行组合使用。The multi-head single-return segmental compression chiller according to claim 1, wherein the compressor is combined with a centrifugal compressor, a magnetic levitation compressor, or a screw compressor.
PCT/CN2022/070417 2021-07-29 2022-01-06 Multi-compressor one-pass segmented compression type water chiller WO2023005155A1 (en)

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