可变速度

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关于交流,供暖和通风的逆变器技术

能源效率的量子飞跃
HVAC市场正在迅速变化。交流逆变器驱动技术是最节能的技术,目前正在彻底改变空调系统的设计和构建方式,以满足世界各地的气候控制需求。第一个采用可变速度技术的人获得了竞争优势。

Market needs:避免系统过度尺寸,减少电费和冲洗电流,增加舒适度和过程是可变容量的一些关键驱动因素。

调节技术:有几种方法可以调节制冷或空调和加热系统中的冷却能力。

旁路方法

工作原则:逆变器压缩机以不同的速度运行,生成调制的制冷剂质量油流量和冷却输出。

视频“ HVAC的逆变器压缩机”

Benefits:更好的电源质量,系统诊断,湿度控制,节能,准确的温度控制,更少的噪声,过程安全性,更大的舒适性

挑战:压缩机和驱动器选择,设计师技能使系统的总体可靠性和效率使系统。

更好的电源质量,系统诊断,湿度控制,节能,准确的温度控制,更少的噪声,过程安全性,更大的舒适性。

Inverter compressor technology offers new opportunities for air conditioning systems, first of all in terms of energy efficient buildings, reduced energy consumption and lower running costs.

此外,该技术改善了功率因数,从而导致更好的电源质量以及更好的系统诊断和促进服务的开放通信协议。

连续适应冷却需求可提供更高的能源节省和准确的温度控制。

压缩机以冷却能力匹配功率输入。与固定速度或机械调制的压缩机相比,该单元有效地应对温度变化并在部分载荷下运行,每年可以减少30%的能源费用。稳定的温度控制以最佳方式确保了过程,并提供了更大的舒适度。总而言之,这意味着建筑物中的能源效率。

容量调节减轻了电力需求峰值,这也有助于提高所提供电力的网格可靠性和质量。

软启动控制导致接近零的电流并改善EER:

  • 直接运行(DOL)压缩机开始绘制标称电流的5-6倍,直到达到压缩机运行速度为止。系统中的传统固定速度压缩机可以制造8-12个开始/停止周期,每个开始都会从供应中吸引高电流,从而导致供应高功耗和压力,以及压缩机机械零件。
  • Most inverter scroll compressors are soft starting which avoid torque surges. It prevents high mechanical stress on the machine, and generates lower service costs and decreased wear. Low in-rush current also helps in saving fixed costs charged by utilities (peak current calculation) and reduces mains and power backup loads.

逆变器压缩机的其他好处是:

  • 更好的湿度控制使该设备甚至适用于温泉安装,这要归功于调整设备的容量,从而更好地控制了蒸发温度。
  • 在部分负载操作过程中,噪音比常规的开关系统要少。
    On top of the standard benefits for all inverter compressors and technology, Danfoss Commercial Compressors has prequalified inverter compressors and drives designed to work together.

This adds to the long list of benefits to manufacturers, consulting engineers and end-users in terms of:

  • 系统中的组件数量减少
  • 更高的可靠性和连续运行
  • 更容易实施技术
  • 降低了应用成本
  • 更快的市场。

图1

使用不同的压缩机配置的冷却系统的能源消耗。基于在低压比(屋顶)应用中使用的10-30TR压缩机的模拟基于模拟的平均消耗指数;索引100 = Danfoss逆变器滚动VZH能耗。

图2

建筑物中的典型负载轮廓。
在建筑物中,只有几个百分比的操作负载。HVAC系统设计用于峰值条件(图的右侧)。这些条件不是设备在大多数情况下运行的条件。该图代表每种条件的典型年度气候数据和运行时间的小时时间(百分比)。

Source: Danfoss HVAC tool

Danfoss Varible Speed技术的好处

压缩机和驱动器选择,设计师技能使系统的总体可靠性和效率使系统。

逆变器驱动器的重要性:压缩机和驱动器需要有资格一起工作并为专用应用程序工作。驱动器可调节压缩机速度,并防止其从压缩机操作限制中运行。逆变器驱动器需要使用专门为加热,通风和空调(HVAC)或制冷开发的算法。他们确保系统将在应用程序约束内运行。该驱动器还可以管理其他设备,例如石油喷射阀或多个压缩机。随着压缩机旋转速度的变化,流经压缩机的制冷剂和油的量增加或减小。驱动器确保压缩机在所有压缩机速度下都可以最佳地润滑。

OEM manufacturer skills in inverter system integration: not all OEMs are yet prepared to adopt inverter technology due to following reasons:

  1. 能力水平和经验工程OEM实施逆变器技术。体育投注必威机械方面的强大经验必须与电气工程技能以及控制器的开发和编程相辅相成。体育投注必威
  2. 逆变器压缩机不断地不断变化以匹配负载,这使系统的油管理与传统技术相比更为复杂。石油管理掌握是一个关键问题 - 当不使用无油的压缩机类型时 - 压缩机制造商的体验使其与众不同
  3. 压缩机和逆变器驱动器制造商对OEM的应用支持在系统集成中至关重要。

对可变速度技术的误解

Inverter technology reacts too slowly to load changes: some inverter scrolls ramp up/down speed range is between <0.1s; 3600s>Full load inverter losses 5-10% at full speed the inverter car lose 3% of efficiency. As full load is not the dominant profile, the loss will be minimal in the overall unit consumption.

在高频运行时,石油循环增加:通过某些逆变器滚动电子控制的石油循环速率在全速下可能小于3%。油管理对逆变器压缩机系统更为复杂。一些逆变器滚动控制着低速和高速的机油循环,需要最小的设计适应。

在EMC(电磁兼容性)的情况下,不能使用逆变器:某些逆变器溶液提供2个水平的EMC过滤,这些液位符合与电磁干扰有关的最严格的欧洲标准。

Avoid systems oversizing, reduce electricity bill and inrush current, increased comfort and process are some key drivers for variable capacity.

许多制冷和空调系统都需要更高效,紧凑,环保,易于安装和维护的可靠流程。由于环境条件,占用率和使用,照明等,白天和一年中的冷却需求在广泛的范围内有所不同。

  • 在舒适冷却中,可能需要在医院,IT和电信,过程冷却等区域进行稳定,准确的温度和湿度控制。
  • In applications such as schools, restaurants and office buildings, it is important that the cooling system is able to adapt to wide daily shifts in load.
  • 在诸如发酵,不断增长的隧道和工业过程之类的过程应用中,需要准确的温度设置以确保生产质量。

Three different market trends are converging to create new opportunities for efficient, sustainable solutions:

  • 能源效率
  • 智能系统
  • 对环境造成的影响

能源效率不再是一种选择。能源法规正在加强。建筑能源代码和标准是全球开发的,能源激励措施正在受到更多关注。另一个全球问题是能源安全。如何确保我们不会有一天缺乏能量?

HVAC and refrigeration systems are usually designed for peak demand which represent only a small percentage of the actual operation. Such oversizing leads to efficiency losses and extra costs for oversized equipment. Energy efficient capacity modulation is a way to match cooling capacity to cooling demand thereby matching these application requirements.

有几种方法可以调节制冷或空调和加热系统中的冷却能力。空调中最常见的是:骑自行车,热气旁路,多个压缩机的多种多样配置,机械调制(也称为数字)和逆变器技术。每个都有优点和缺点。

  • 开关循环:在光负载条件下关闭固定速度压缩机,并可能导致循环短并减少压缩机寿命。压力循环和瞬态损失降低了单元的效率。倒车容量为100%或0%。
  • 热气旁路:涉及从排放到吸气侧的一定数量的气体。压缩机将保持以相同的速度运行,但是由于旁路,制冷剂质量流与系统循环,从而降低了冷却能力。这自然会导致压缩机在旁路运行的时期内无需运行。倒车容量在0%至100%之间变化。
  • 歧管配置:可以在系统中安装多个压缩机以提供峰值冷却能力。每个压缩机都可以运行或不运行,以便上台设备的冷却能力。对于均匀的三重构配置,转倒能力为0/33/66或100%,串联的倒车容量为0/50或100%。
  • 机械调制的压缩机:此内部机械容量调制基于带有控制阀的周期性压缩过程,2卷轴集移动以在给定时间段内停止压缩。该方法通过更改平均压缩时间而不是电动机的实际速度来改变制冷剂流动。尽管截止比率很高 - 从冷却能力的10%到100%,随着电动机连续运行,机械调制的滚动量具有高能量消耗。
  • Inverter compressor: uses a variable frequency drive – also known as inverter drive– to slow down or speed up the motor that rotates the compressor. This method varies refrigerant flow by actually changing the speed of the compressor. The turndown ratio depends on the system configuration and manufacturer. It modulates from 10% (depending on the compressor model) up to 100% at full capacity with a single inverter.

空调约占美国这样的国家每年电力消耗的20%。在空调和热泵系统中引入逆变器驱动技术为由于有效的零件负载操作而为节省大量节能提供了机会,还有助于提高电网的功率质量。

功率因数是对电力实用程序必须努力发电的重要衡量标准。

Increasing the power factor of installations can directly impact the quality of power supply. For electric utilities, this equates to fewer losses and improved reliability of service. For building- and homeowners, this means more efficient equipment with the possibility of local utility, state and/or federal incentive programs.

功率因数是位移功率因数(主动和反应功率的位移)和失真因数(由于谐波引起的电力的失真)的组合。

接近1的功率因数表示:

  • 没有干扰其他安装设备,
  • 没有干扰电源,
  • 损失降低和效率更高。

逆变器驱动器的使用可以显着增强功率因数,因为位移功率因数接近1。失真因子因谐波而产生的负面影响会影响变形因子,电缆,电缆,保险丝和断路器由于谐波而导致的断路器。

Danfoss逆变器技术由于DC扼流圈的校正而具有低失真和高功率因数(0.98),而其他逆变器驱动器或机械调制系统的功率因数可能低至0.60。

丹福斯逆变器解决方案中预先合格的驱动校正的其他好处:

  • 必要时会增加立即电路电压,从而提高低电源电压下的工作能力。
  • 增加交流电感器内的电压,减少整个功率组件链中的电流和压力,同时最小化成本。
  • 较高的直流链接电压可减少电动机电流和损耗。
  • 可以根据需要打开和关闭主动功率因数校正(PFC),以获得最佳系统效率。

逆变器压缩机设计为使用驱动器操作,该驱动器无需逐步调整压缩机电机的速度以提供冷却需求。

它可以是滚动,旋转或往复式,半热,打开的压缩机,包括螺钉,离心机和轴向压缩机。这种类型的压缩机使用特殊驱动器来控制压缩机电动机速度(以每秒RPS的圆形测量)。逆变器压缩机可以以不同的速度运行:逆变器压缩机专门设计用于以不同的运动速度运行,从而产生调制的制冷剂质量油流量和冷却输出。

The variable frequency drive indicates the cooling requirement to the compressor motor. The motor continuously adapts speed to produce more or less cooling capacity to match the exact cooling need. The combination of the two devices – compressor and drive – gives a continuous cooling modulation. The variable speed principle requires a very sturdy compressor for full speed running and a special compressor lubrication system for systems using oil. Excellent oil management is a critical requirement to secure compressor lifetime. The oil management system guarantees good lubrication of the scroll set at low speed and prevents excess oil from being injected into the circuit when operating at full speed to maintain a perfect Oil Circulation Ratio.

可变速度视频

Danfoss可变速度技术

通过使用DANFOSS逆变器压缩机溶液,与传统的On-Owt压缩机或机械调制的技术相比,可以节省大量能源。

突出的产品betway88必威手机版

Danfoss is the leading manufacturer of oil-free compressors and is the pioneer of the Danfoss Turbocor® compressor - the world’s first oil-free magnetic bearing compressor for the HVAC industry.

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Danfoss Turbocor model TGS oil free compressors are available in 5 different models ranging from 40 tons to 150 / 140 kW to 540 kW utilizing ultra-low GWP R1234ze or R515B.

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Danfoss Turbocor®model TTS oil free compressors are available in four different models ranging from 60 tons to 200 tons / 200 to 700 kW utilizing R134a or low GWP R513A.

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Danfoss Turbocor® model VTT oil free compressor is available with a capacity up to 400 tons / 1430 kW using R134a.  This compressor is designed for water and evaporative cooled chiller applications.

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Danfoss inverter scroll compressor VZH offers effectiveness and reliability. Over 30% energy savings is possible in rooftops, chillers, close controls etc.

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相关应用程序

Air handling units with integrated cooling are used in commercial applications for air conditioning in many different kinds of buildings, from small office buildings, fitness centers and medical institutions to skyscrapers.

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Packaged unit for electronic cabinet cooling. Close control air conditioners are used in the cooling of electronics such as IT and electronic equipment used in data centers, in telecommunications and in manufacturing industries.

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Core component of the HVAC system, a chiller cools the water or brine used to cool and dehumidify air in buildings or industrial processes. It's a factory-assembled unit that cools the water or brine using an evaporator, and has an internal or a remote condenser with appropriate controls.

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Cooling of IT equipment in data centres is an increasing challenge for operators and design engineers. Power management is the major challenge, with energy consumption and heat loads increasing in step with the server density. Meeting these challenges is essential for ensuring the safety and availability of the data.

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In many industrial processes the machinery or processes generate heat which requires cooling, to protect the equipment and/or to ensure that the product being manufactured is of the required quality. The process cooling unit is used to cool, to extract humidity or regulate the temperature of the manufacturing process.

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Variable Refrigerant Volume or Variable Refrigerant Flow (depending on the manufacturer) has been established since the early 1990s. The basic idea is that a large outdoor unit (or several manifolded outdoor units) serves multiple indoor units.

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学习

在线培训和有关逆变器技术的电子培训

欢迎来到Danfoss在线培训门户!通过这项服务,Danfoss加强了对所有HVAC-R专业人员和学生的支持。今天注册,以获取最大化您的表演和利润的绝佳机会!

对我来说有什么?

  • 从可变速度 /逆变器压缩机中的领导者中了解现有技术。
  • 我们提供免费的E-LESSON,在线课程和面对面的研讨会,其中包括技术说明,视频和现场体验。

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案例故事

The new Alsik hotel in Southern Denmark sets a higher standard in energy-efficiency and is built to reach 76% CO₂-neutrality. A main contributor is the 900-kW chillers by Clint (a company of G.I. Industrial Holding) which features award-winning Danfoss Turbocor oil-free compressors.

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]},{"Id":"https://danfoss-webex-umbraco-prodgreen.azurewebsites.net/en/service-and-support/case-stories/dcs/oil-free-compressors-maintain-consistent-performance-over-time/","FormattedStartDate":null,"FormattedEndDate":null,"Link":{"NewWindow":false,"Url":"/en/service-and-support/case-stories/dcs/oil-free-compressors-maintain-consistent-performance-over-time/"},"IsExternalLink":false,"Title":"Oil-free compressors maintain consistent performance over time","Image":"/media/8383/turbocor.jpg","ImageAltText":"TT- Turbocor Danfoss","Description":"

Danfoss conducted a study to see how long term operation affected performance on Danfoss Turbocor® compressors. The results showed that oil-free, magnetic bearing compressors maintained consistent performance even after 10+ years of operation.

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]},{"Id":"https://danfoss-webex-umbraco-prodgreen.azurewebsites.net/en/service-and-support/case-stories/dcs/data-center-cooling-efficient-and-reliable-with-inverter/","FormattedStartDate":null,"FormattedEndDate":null,"Link":{"NewWindow":false,"Url":"/en/service-and-support/case-stories/dcs/data-center-cooling-efficient-and-reliable-with-inverter/"},"IsExternalLink":false,"Title":"Data center cooling: efficient and reliable with inverter","Image":"/media/7576/data-center-1-danfoss.jpg","ImageAltText":"data center with inverter danfoss","Description":"

Example of data center cooling featuring inverter technology that reaches low PUE, saves energy and costs and secures data process.

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]},{"Id":"https://danfoss-webex-umbraco-prodgreen.azurewebsites.net/en/service-and-support/case-stories/dcs/data-center-cooling/","FormattedStartDate":null,"FormattedEndDate":null,"Link":{"NewWindow":false,"Url":"/en/service-and-support/case-stories/dcs/data-center-cooling/"},"IsExternalLink":false,"Title":"Data center cooling","Image":"/media/7574/data-center-danfoss.jpg","ImageAltText":"Data center cooling danfoss","Description":"

A world leading company in wireless technologies opt for three 1,400-ton chillers powered by 21 Danfoss Turbocor™ compressors to improve efficiency and lower costs at data center.

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]},{"Id":"https://danfoss-webex-umbraco-prodgreen.azurewebsites.net/en/service-and-support/case-stories/dcs/hotel-with-chiller-retrofit/","FormattedStartDate":null,"FormattedEndDate":null,"Link":{"NewWindow":false,"Url":"/en/service-and-support/case-stories/dcs/hotel-with-chiller-retrofit/"},"IsExternalLink":false,"Title":"Hotel with chiller retrofit","Image":"/media/7571/hotel-with-chiller-danfoss.jpg","ImageAltText":"hotel with chiller danfoss","Description":"

Inverter chiller retrofit brings huge savings in a five star hotel installation, operating and maintenance costs, with compact Danfoss inverter oil–free compressor Turbocor®.

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]},{"Id":"https://danfoss-webex-umbraco-prodgreen.azurewebsites.net/en/service-and-support/case-stories/dcs/process-chillers/","FormattedStartDate":null,"FormattedEndDate":null,"Link":{"NewWindow":false,"Url":"/en/service-and-support/case-stories/dcs/process-chillers/"},"IsExternalLink":false,"Title":"Process chillers","Image":"/media/7569/process-chillers-danfoss.jpg","ImageAltText":"process chillers danfoss","Description":"

Variable speed with Danfoss Turbocor Oil free centrifugal compressor guarantees reliable process cooling and efficient comfort cooling in factory

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]}]" data-group-type="case-study" data-check-all-label="Explore more" data-redirect-url="">

消息

We are all looking forward to the possibility of meeting you live at Europort 2021, November 2-5th in Ahoy Rotterdam.

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]},{"Id":"https://danfoss-webex-umbraco-prodgreen.azurewebsites.net/en/about-danfoss/news/dcs/coolselector-2-we-did-complex-you-do-awesome/","FormattedStartDate":"Wednesday, March 20, 2019","FormattedEndDate":null,"Link":{"NewWindow":false,"Url":"/en/about-danfoss/news/dcs/coolselector-2-we-did-complex-you-do-awesome/"},"IsExternalLink":false,"Title":"Coolselector®2: We did complex. You do awesome.","Image":"/media/8160/coolselector.png","ImageAltText":"Coolselector®2","Description":"

Coolselector®2 is essential software for engineers, consultants, and system designers who work in the refrigeration and air conditioning industry. Using Coolselector®2, you can easily optimize energy consumption and increase efficiency in your HVACR system — simply run calculations based on your operating conditions and then choose the best component setup for your design.

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]},{"Id":"https://danfoss-webex-umbraco-prodgreen.azurewebsites.net/en/about-danfoss/news/dcs/new-8-5-tr-and-11-tr-variable-speed-compressors-with-idv/","FormattedStartDate":"Wednesday, October 10, 2018","FormattedEndDate":null,"Link":{"NewWindow":false,"Url":"/en/about-danfoss/news/dcs/new-8-5-tr-and-11-tr-variable-speed-compressors-with-idv/"},"IsExternalLink":false,"Title":"New 8.5 TR and 11 TR variable speed compressors with IDV","Image":"/media/7256/vzh-in-close-control2.jpg","ImageAltText":"New 8.5 TR and 11 TR variable speed compressors with IDV","Description":"

New efficiency opportunities for Chiller/Rooftop units and Computer Room Air-Conditioners

\n

Danfoss has added new 8.5 TR and 11 TR (*) variable speed compressors with IDV(**) to its popular VZH range, giving commercial cooling manufacturers the market’s most complete choice of variable speed scrolls with qualified drives for HVAC systems.

","StartDate":null,"EndDate":null,"Location":null,"EventTypes":null,"HasErrors":false,"HasWarnings":false,"Errors":[],"Warnings":[]}]" data-group-type="news" data-check-all-label="Explore more" data-redirect-url="">
  • 如果(ISSMALLPICTURE){ 欧洲2021年 } else if(isbigcolumns){ 欧洲2021年 } 别的 { 欧洲2021年 }
    我们会在2021年Europort见到您吗?
    2021年10月5日,星期二

    我们都期待有可能在11月2日至5日在Ahoy Rotterdam见到您住在欧洲2021年欧洲居住的可能性。

  • 如果(ISSMALLPICTURE){ Coolselector®2 } else if(isbigcolumns){ Coolselector®2 } 别的 { Coolselector®2 }
    CoolSelector®2:我们做了复杂的工作。你真棒。
    2019年3月20日,星期三

    Coolsector®2是在制冷和空调行业工作的工程师,顾问和系统设计师的重要软件。使用Coolsector®2,您可以轻松地优化能源消耗并提高HVACR系统的效率 - 只需根据操作条件运行计算,然后选择设计最佳组件设置即可。

  • 如果(ISSMALLPICTURE){ New 8.5 TR and 11 TR variable speed compressors with IDV } else if(isbigcolumns){ New 8.5 TR and 11 TR variable speed compressors with IDV } 别的 { New 8.5 TR and 11 TR variable speed compressors with IDV }
    New 8.5 TR and 11 TR variable speed compressors with IDV
    2018年10月10日,星期三

    冷却器/屋顶单元和计算机房间的新效率机会

    Danfoss在其流行的VZH范围内添加了带有IDV(**)的新的8.5 TR和11个TR(*)可变速度压缩机,为商业冷却制造商提供了市场最完整的可变速度滚动选择,并提供了用于HVAC系统的合格驱动器。

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