CN110249183B - 具有蒸发式冷凝器的低充注量一体式氨制冷系统 - Google Patents
具有蒸发式冷凝器的低充注量一体式氨制冷系统 Download PDFInfo
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Abstract
一种一体式泵送液体蒸发式冷凝再循环氨制冷系统,每冷吨制冷量所需的制冷剂为10磅甚至更少。压缩机及相关部件位于标准蒸发式冷凝器单元的气室内,蒸发器与蒸发式冷凝器紧密连接。现有技术的大型接收器容器可以用单相旋流分离器或双相旋流分离器代替,该分离器也容纳在蒸发式冷凝器的气室中。
Description
技术领域
本发明涉及工业制冷系统。
背景技术
现有技术的工业制冷系统,例如用于冷藏仓库的制冷系统,尤其是基于氨的制冷系统,是高度划分的。蒸发器盘管通常安装在冷却空间内,或收集在冷却空间上方的顶室(penthouse) 内,冷凝器盘管和风扇通常安装在包含冷藏空间的建筑物顶部的独立空间内,压缩机、接收罐、油分离器罐和其他机械系统通常容纳在远离公共空间的单独机室内。由于氨对人体具有毒性,以及人为错误或机械完整性而引起的泄漏的影响,因此含有大量氨的氨基工业制冷系统会受到严格的管制。含有超过10000磅氨的系统需要符合EPA的风险管理计划(RMP)和OSHA的过程安全管理计划的要求,并可能受到联邦机构的调查。加州对含有超过500磅氨的系统有额外的限制/要求。任何制冷系统因泄漏而导致100磅或更多氨的排放必须向EPA报告。
发明内容
本发明是一种一体式泵送液体再循环制冷系统,其中每冷吨制冷量所需的制冷剂充注量为10磅甚至更少。本发明提供一种低充注量一体式制冷系统,其中压缩机和相关部件位于预组装的模块化机室中,其中冷凝器与预组装的模块化机室紧密连接。根据本发明的一个实施例,现有技术的大型接收器容器,用于分离从蒸发器流出的制冷剂蒸汽和制冷剂液体并存储备用制冷剂液体,可以用容纳于预组装的模块化机室内的液汽分离结构/装置代替。根据一个实施例,液汽分离结构/装置可以是单相旋流分离器或双相旋流分离器。根据本发明的另一个实施例,标准节热器(economiser)容器(其收集从冷凝器流出的液体)也可以可选地用单相旋流分离器或双相旋流分离器代替,也可以容纳于预组装的模块化机室内。蒸发器盘管优选地配以内部增强件,其改善制冷剂液体通过管的流动,改善热交换并减少制冷剂充注量。根据一个实施例,冷凝器可以由盘管构成,盘管优选地配以内部增强件,其改善制冷剂蒸汽通过管的流动,改善热交换并减少制冷剂。根据更优选的实施方案,蒸发器管增强件和冷凝器管增强件彼此不同。共同待审的临时申请序列号62/188,264,标题为“用于盘管产品的内部增强管”的专利申请文件内容整体并入本文。根据替代实施例,冷凝器系统可采用微通道热交换器技术。该冷凝器系统可以是本领域已知的任何类型,用于将制冷剂蒸汽冷凝成液体制冷剂。
根据多个实施例,该系统可以是液体超喂(overfeed)系统或直膨系统,但是极低充注量或“临界充注量”系统最优选具有超喂率(进入蒸发器的液体制冷剂的质量流率与产生冷却效果所需的蒸汽的质量流率之比)为1.05:1.0至1.8:1.0,优选的超喂率为1.2:1。为了保持如此低的超喂率,如美国专利申请序列号14/221,694和14/705,781中描述的那些电容传感器,可以在系统中的各个点处提供,以确定液体和蒸汽的相对量,从而可以相应地调整该系统,上述两篇专利申请文件的全部内容通过引用整体并入本文。优选地,这些传感器位于液汽分离装置的入口处和/或蒸发器的出口处,和/或位于蒸发器的出口和液汽分离装置之间的制冷剂管道中的某处,和/或在压缩机的入口处和/或液汽分离装置的蒸汽出口与压缩机之间的制冷剂管道中的某处。
另外,冷凝器系统和机室优选地与蒸发器紧密连接。在顶室蒸发器布置的情况下,其中蒸发器位于冷却空间上方的“顶室”空间内,机室优选地连接至预制的顶室蒸发器模块。在冷却空间中蒸发器顶置的情况下,集成冷凝器系统和模块化机室安装在底部或蒸发器单元正上方的顶部上(所谓的“分离系统”)。
根据另一实施例,压缩机和相关部件可位于蒸发式冷凝器的气室内部,并且蒸发式冷凝器的盘管紧密地联接到压缩机和冷却器组件的其他部件。具体地,根据该实施例,标准或改进的现有技术蒸发式冷凝器的气室中的未充分利用的空间用于容纳冷却器组件的其余部件,其中蒸发器位于冷却空间或蒸发器模块中,优选相邻于集成的蒸发式冷凝器/冷却器组件。根据该实施例,该系统可以使用具有横流填料的引风共流冷凝器盘管。空气通过填料介质和盘管顶部进入该组件的一个长侧。冷却器组件的平衡装置安装在冷凝器气室内,集液槽位于下方。这种集成结构的另一个好处是,它可以允许伸入式而不是步入式取得冷藏室的服务项目。
根据本发明的另一个实施例,可以提供一种引风蒸发式冷凝器装置,其可以用在整个平面区域上延伸的较大的冷凝盘管来代替填料介质。在该实施例中,空气和水将呈逆向流动的方式通过蒸发冷凝盘管。引风装置允许外界空气进入盘管的所有侧,包括通过冷却器区域,只要该区域未被封闭的话,尽管冷却器组件必须与下落的喷水隔离。
根据又一些实施例,提出了具有轴向风扇或离心风扇的强制通风单元。根据这些具有强制通风轴向或离心式风扇实施例的蒸发式冷凝器,风扇将从冷凝器的一个长侧将空气吹入该单元。冷却器组组件和气室之间需要有壁以使空气转向,将其向上导向通过盘管。
与现有技术相比,本文所述的特征的组合提供了非常低充注量的制冷系统。具体而言,本发明构造成每冷吨制冷量需要少于6磅氨。根据优选的实施方案,本发明每冷吨制冷量可需要少于4磅氨。并且根据最优选的实施方案,本发明可以在每冷吨制冷量需要小于2磅的情况下有效运作。相比之下,现有技术的“构件式”系统每冷吨制冷量需要15-25磅氨,而现有技术的低充注量系统每冷吨制冷量需要大约10磅氨。因此,对于50冷吨的制冷系统,现有技术的构件式系统需要750-1250磅氨,现有技术的低充注量系统需要大约500磅氨,而本发明需要少于300磅氨,并且优选地,小于200磅氨,更优选小于100磅氨,这个数字要低于EPA的报告阈值(假设系统中的所有氨都泄漏出来的话)。实际上,根据本发明的50冷吨的制冷系统,系统中的全部氨可以排放到周围区域而不会对人或环境造成显着的损害或伤害。
附图说明
图1是根据本发明的实施例的制冷系统的示意图;
图2是图1的左上部分的放大图;
图3是图1的左下部分的放大图;
图4是图1的右下部分的放大图;
图5是图1的右上部分的放大图;
图6是根据本发明的一个实施例的蒸发器模块和预组装模块化机室组合在一起的三维透视图;
图7是根据本发明的另一个实施例的蒸发器模块和预组装模块化机室组合在一起的三维透视图;
图8是根据本发明的一个实施例的预组装模块化机室和冷凝器单元内部的三维透视图;
图9是根据本发明的另一个实施例的预组装模块化机室和冷凝器单元内部的三维透视图;
图10是根据本发明的另一个实施例的蒸发器模块和预组装模块化机室组合在一起的三维透视图;
图11示出了蒸发器模块和预组装模块化机室组合在一起的三个不同实施例的三维透视图,其中左侧的实施例包括安装在顶部的风冷式冷凝器系统;
图12示出了根据本发明另一实施例的预组装模块化机室内部的三维剖视图;
图13示出了顶室蒸发器模块和预组装模块化机室组合在一起的内部的三维剖视图;
图14是现有技术的蒸发式冷凝器;
图15示出了根据本发明的一个实施例的一体式的氨蒸发式-冷凝冷却机。
具体实施方式
图1是根据本发明实施例的低充注量一体式制冷系统的流程和仪表图。图1中四个象限的放大图分别如图2至图5所示。该系统包括蒸发器2a、2b(其分别包括蒸发器盘管4a、4b)、冷凝器8、压缩机10、膨胀装置11a、11b(可设为阀门、节流孔或其他膨胀装置的形式)、泵 16、液汽分离装置12及节热器14。根据一个实施例,液汽分离装置12可以是再循环器容器。根据其他实施例,液汽分离装置12和节热器14中的一个或两者均可以设置为单相旋流分离器或双相旋流分离器的形式。前述元件可以通过标准的制冷剂管道以图1-5所示的方式连接。除非另有说明,本文所用的术语“连接到”或“经由……连接”是指直接连接或间接连接。可选的除霜系统18包括乙二醇箱20、乙二醇泵22、乙二醇冷凝器盘管24和乙二醇盘管6a、 6b,根据图1中所示的布置,同样使用制冷剂管道互相连接并连接到该系统的其他元件。根据其他可选的替代实施例,可提供热气体或电除霜系统还可提供蒸发器供给泵/再循环器16,以提供促使液体制冷剂通过蒸发器热交换器必要的额外能量。
根据图1-5中所示的实施例,低压液体制冷剂(“LPL”)通过泵16经由膨胀装置11供给至蒸发器。制冷剂从冷却空间吸收热量,以低压蒸汽(“LPV”)和液体的形式离开蒸发器,并被输送至液汽分离装置12(可选地可以是旋流分离器),该分离装置将液体从蒸汽中分离。液体制冷剂(“LPL”)返回泵16,蒸汽(“LPV”)被输送至压缩机10,压缩机10冷凝这些蒸汽并将高压蒸汽(“HPV”)送至冷凝器8,该冷凝器将这些高压蒸汽压缩成高压液体(“HPL”)。高压液体(“HPL”)被输送至节热器14,该节热器通过将高压液体 (“HPL”)降压为中压液体“IPL”然后将其输送至液汽分离装置12来提高系统效率,该分离装置向泵16供应低压液体制冷剂(“LPL”),从而完成制冷剂循环。乙二醇流路(在可选的乙二醇除霜系统的情况下)和压缩机油流路也如图1-5所示,除了注意到目前的低充注量一体式制冷系统可选择地包括组装系统内的完全除霜和压缩机油再循环子系统之外,此处不需要更详细的讨论。图1-5还包括许多控制阀、隔离阀和安全阀,以及用于监控和控制系统的温度传感器和压力传感器(也称为指示器或量具)。另外,可选的传感器26a、26b可以位于所述蒸发器2a、2b的下游、液汽分离装置12的入口上游,以测量离开蒸发器的制冷剂的汽液比。根据替代实施例,可选的传感器26c可以位于液汽分离装置12的出口和压缩机 10的入口之间的制冷剂管道中。传感器26a、26b和26c的类型可以是美国专利申请序列号 14/221,694和14/705,781中公开的电容传感器,其公开内容通过引用整体并入本文。图6示出了根据本发明一个实施例的顶室蒸发器模块和预组装模块化机室组合在一起的示例。根据该实施例,蒸发器容纳在蒸发器模块中,并且图1-5中所示的系统的其余部件容纳在机室模块中。根据本发明可采用的冷凝器系统的各种实施例包括蒸发式冷凝器,具有可选的内部增强管,具有可选内部增强的风冷翅片和管式热交换器、风冷微通道热交换器和水冷热交换器。在风冷式冷凝器系统的情况下,冷凝器盘管和风扇可安装在机室模块的顶部,以形成完整的独立顶置系统。其他类型的冷凝器系统可能位于机室内。根据该实施例,整个系统完全自容于两个顶置模块,这使得非常容易通过公路运输来运输到安装地,例如使用平板运载的非护航车辆。顶室模块和机室模块可以分开运输和/或组装后一起运输,而根据最优选的实施例,顶室模块和机室模块彼此相邻安装,以最大限度地减少制冷剂充注量。根据最优选的实施例,顶室模块和机室模块集成在一个模块中,尽管蒸发器空间与机室空间分离和隔离,以符合工业规范。图7、10和11示出了相邻的顶室蒸发器模块和机室模块的其他示例。
图8、9和12是根据本发明实施例的预组装模块化机室和冷凝器单元的内部的三维剖面透视图,其中,除蒸发器外,低充注量一体式制冷系统的所有元件均包含在集成单元中。如本文所讨论的那样,蒸发器可以容纳在顶室模块中,或者可悬挂在冷却空间中,优选地悬挂在机室模块的位置正下方。根据这些实施例,蒸发器构造成直接冷却在冷却空间中的空气或供至该冷却空间的空气。
根据替代实施例(例如,其中最终用户不希望冷却空气与含氨部件/管道接触),蒸发器可配置为热交换器以冷却次级非挥发性流体,例如水或水/乙二醇混合物,其中次级非挥发性流体用于冷却处于冷却空间中的空气。在这种情况下,蒸发器可安装在机室内。
图13是顶室蒸发器模块和预组装模块化机室组合在一起的内部剖面三维透视图。
与现有技术相比,如本文所述的特征组合提供了非常低充注量的制冷系统。具体地说,本发明配置为每冷吨的制冷量需要少于6磅氨。根据优选的实施方案,本发明每冷吨制冷量可以需要少于4磅氨。根据最优选的实施方案,本发明可以在每冷吨制冷量小于2磅氨的情况下有效地运行。相比之下,现有技术的“构件式(stick-built)”系统每冷吨制冷量需要 15至25磅氨,而现有技术的低充注量系统每冷吨制冷量需要大约10磅氨。因此,对于50 冷吨的制冷系统,现有技术的构件式系统需要750至1250磅氨,现有技术的低充注量系统大约需要500磅氨,本发明需要少于300磅的氨,优选少于200磅的氨,更优选少于100磅的氨,这个数量低于EPA的报告阈值(假设系统中所有的氨气都泄漏的话)。实际上,根据本发明的50冷吨制冷系统,系统中的全部氨可以排放到周围区域而不会对人类或环境造成显着的损害或伤害。
尽管主要在其中氨作为制冷剂的制冷系统的背景下描述了本发明,但是可以预期本发明将同样适用于使用其他天然制冷剂(包括二氧化碳)的制冷系统。
本发明的描述实际上仅是示例性的,因此,不脱离一体式的(单模块或双模块集成和紧凑的系统)低制冷剂充注量构思的制冷系统的变形(即,每冷吨制冷量需要小于10磅制冷剂) 应在本发明的范围内。本文所述的具体实施方案的任何变形(构成一体式泵送液体再循环制冷系统,其中每冷吨制冷量为10磅制冷剂或更少的制冷剂),不应视为脱离随后的权利要求所提出的本发明的精神和范围。
图14示出了由申请人销售的现有技术蒸发式冷凝器单元,称为ATC-E蒸发式冷凝器。在该单元的四侧金属壳体202内安装有位于盘管206上方的水分配系统204,该盘管206又位于气室208上方。气室可选地包含填料。在气室的底部是水盆210,水在该处被收集并泵送至水分配系统204。在该单元的顶部是引风机212,其通过该单元侧面中的靠近气室侧面的开口从外部抽出空气,向上通过盘管并从该单元的顶部流出。工作流体通过盘管循环,通过流经盘管上方的水和空气的蒸发作用冷却该工作流体。
图15示出了根据本发明的实施例的集成蒸发冷凝氨冷却器组件的示例,其中冷却器的元件被组装在蒸发式冷凝器单元的气室118中。可以为本发明使用或改进的蒸发式冷凝器单元的实例包括但不限于申请人益美高(Evapco)股份有限公司的ATC-E型蒸发式冷凝器。高压蒸汽在入口110处进入冷凝盘管108并在出口112处离开该盘管。水分配系统114将水喷洒在盘管108上,然后通过位于气室118中的填料116落下,以收集在单元底部的集液槽120 中,在该处通过水分配系统将其泵回。引风风扇122位于该单元顶部的水分配系统附近,并经过位于水分配系统上方的进气口并通过该单元与填料116相邻的一侧将空气吸进系统。进入盘管108的空气经过漂浮物消除器124通过该侧离开盘管,并通过单元顶部的引风风扇122 排出。类似地,通过单元下侧进入气室108的空气通过引风风扇122从顶部排出该单元。根据该实施例,图1-5中所示系统的冷却器部件容纳在蒸发式冷凝器部件的气室中。蒸发器可位于冷却空间或与集成蒸发式冷凝冷却机机组相邻的蒸发器模块中。
Claims (18)
1.一种制冷系统,包括:
制冷剂蒸发器盘管;
汽液分离结构,其通过制冷剂管道连接至所述蒸发器盘管的出口,所述汽液分离结构构造成将低压的制冷剂蒸汽与低压的制冷剂液体分离;
制冷剂压缩机,其通过制冷剂管道连接至所述汽液分离结构的出口,并构造成压缩来自所述汽液分离结构的制冷剂蒸汽;
蒸发式制冷剂冷凝器,其通过制冷剂管道连接至所述制冷剂压缩机的出口,并构造成将在所述压缩机中产生的制冷剂蒸汽冷凝成制冷剂液体;
高压侧膨胀装置,其通过制冷剂管道连接至所述蒸发式制冷剂冷凝器的出口,并构造成降低从所述蒸发式制冷剂冷凝器处接收的制冷剂液体的压力;
收集容器,其通过制冷剂管道连接至所述高压侧膨胀装置的出口,用于从所述高压侧膨胀装置接收制冷剂液体;
低压侧膨胀装置,其通过制冷剂管道连接至所述收集容器的出口,并构造成降低从所述收集容器接收的制冷剂液体的压力;
制冷剂管道,其将所述低压侧膨胀装置的出口连接至所述汽液分离结构的入口,并构造成将制冷剂液体输送至所述分离结构;
所述汽液分离结构具有通过制冷剂管道连接至所述蒸发器的入口的液体出口;
其中,所述汽液分离结构、所述压缩机、所述高压侧膨胀装置、所述收集容器和所述低压侧膨胀装置位于所述蒸发式制冷剂冷凝器的气室内;并且其中,所述制冷剂为氨,并且,所述蒸发式制冷剂冷凝器包括位于冷凝器盘管上方的水分配系统,并且所述气室位于所述冷凝器盘管的下方并与所述冷凝器盘管相邻。
2.根据权利要求1所述的制冷系统,其每冷吨制冷量需要少于6磅的制冷剂。
3.根据权利要求1所述的制冷系统,其中所述汽液分离结构包括旋流分离器。
4.根据权利要求1所述的制冷系统,其中所述汽液分离结构包括再循环容器。
5.根据权利要求1所述的制冷系统,其中,所述收集容器包括旋流分离器。
6.根据权利要求1所述的制冷系统,其中,所述收集容器包括节热器。
7.根据权利要求1所述的制冷系统,其中,所述蒸发器盘管具有内部增强件,以改善其中的液体/蒸汽的流动,并改善热交换及制冷剂充注。
8.根据权利要求1所述的制冷系统,其中,所述冷凝器包括具有内部增强件的盘管。
9.根据权利要求1所述的制冷系统,其中,所述冷凝器包括微通道热交换器。
10.根据权利要求1所述的制冷系统,还包括液汽质量比传感器,其位于连接所述蒸发器盘管和所述汽液分离结构这两者的制冷剂管道内。
11.根据权利要求1所述的制冷系统,还包括液体—蒸汽质量比传感器,其位于连接所述汽液分离结构和所述压缩机这两者的制冷剂管道内。
12.根据权利要求1所述的制冷系统,还包括油分离器容器,所述油分离器容器构造成将压缩机油与从所述压缩机接收的制冷剂蒸汽分离。
13.根据权利要求1所述的制冷系统,其每冷吨制冷量需要少于4磅的制冷剂。
14.根据权利要求1所述的制冷系统,其每冷吨制冷量需要少于2磅的制冷剂。
15.一种降低制冷系统每冷吨制冷量所需制冷剂量的方法,所述制冷系统具有蒸发器、液汽分离器、压缩机、蒸发式冷凝器和收集容器,所述蒸发式冷凝器包括位于冷凝器盘管上方的水分配系统,并且所述蒸发式冷凝器的气室位于所述冷凝器盘管的下方并与所述冷凝器盘管相邻,所述方法包括:将所述压缩机、所述液汽分离器和所述收集容器组装在所述蒸发式冷凝器的气室内;通过制冷剂管道将所述蒸发器连接至所述蒸发式冷凝器,并用氨制冷剂充注所述制冷系统。
16.根据权利要求15所述的方法,其中所述蒸发器安装在预制的模块化蒸发器室中。
17.根据权利要求16所述的方法,其中所述预制的模块化蒸发器室安装在相邻于所述蒸发式冷凝器处。
18.根据权利要求15所述的方法,其中所述蒸发器安装在所述蒸发式冷凝器正下方的冷却空间中。
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RU2746513C2 (ru) | 2021-04-14 |
RU2019117860A (ru) | 2021-01-12 |
US20180163998A1 (en) | 2018-06-14 |
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CN110249183A (zh) | 2019-09-17 |
CA3238295A1 (en) | 2018-06-21 |
CA3046495A1 (en) | 2018-06-21 |
US20230108961A1 (en) | 2023-04-06 |
RU2019117860A3 (zh) | 2021-02-15 |
WO2018111907A1 (en) | 2018-06-21 |
WO2018111907A9 (en) | 2019-08-01 |
US11035594B2 (en) | 2021-06-15 |
US11885513B2 (en) | 2024-01-30 |
ZA201904350B (en) | 2020-02-26 |
EP3551944A4 (en) | 2020-07-08 |
EP3551944A1 (en) | 2019-10-16 |
MX2023000583A (es) | 2023-02-13 |
BR112019011824A2 (pt) | 2019-10-29 |
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