{"id":117828,"date":"2023-08-18T12:17:54","date_gmt":"2023-08-18T10:17:54","guid":{"rendered":"https:\/\/www.velasolaris.com\/handbuch\/irradiance-controller\/"},"modified":"2023-10-25T17:03:30","modified_gmt":"2023-10-25T15:03:30","slug":"irradiance-controller","status":"publish","type":"handbuch","link":"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/controllers\/irradiance-controller\/","title":{"rendered":"Irradiance Controller"},"content":{"rendered":"\n

The irradiance controller is a one-channel controller that regulates up to two components based on irradiance values. The controller is mainly used as a solar loop controller.<\/p>\n\n\n\n

The controller has 1 (plus 1 optional) analogic inputs.<\/p>\n\n\n\n

The controller has 1 (plus 1 optional) digital outputs.<\/p>\n\n\n\n

Block Diagram<\/strong><\/h2>\n\n\n\n

The block diagram shows the employed measuring and controlling values<\/p>\n\n\n\n

\n
\"\"
Figure: measuring and controlling values of irradiance controller<\/figcaption><\/figure>\n<\/div>\n\n\n\n

Controller Input Mask \u201cFixed Value\u201d<\/strong><\/h2>\n\n\n\n
\n
\"\"
Figure: irradiance controller input mask \u201cFixed value\u201c<\/figcaption><\/figure>\n<\/div>\n\n\n\n

With this setting the pump cuts in as soon as the global irradiance is greater 100 W\/m2.<\/p>\n\n\n\n

Controller Input Mask \u201cVariable Value\u201d<\/strong><\/h2>\n\n\n\n
\n
\"\"
Figure: irradiance controller input mask \u201cVariable value\u201c<\/figcaption><\/figure>\n<\/div>\n\n\n\n

With this setting the pump cuts is as soon as the global irradiance is greater than the diffuse irradiance.<\/p>\n\n\n\n

Input Values<\/strong><\/h2>\n\n\n\n

<\/p>\n\n\n\n

Irradiance Sensor [W\/m2<\/sup>]<\/h3>\n\n\n\n

The value refers to which irradiance should be measured. A distinction can be made between \u201cGlobal irradiance\u201d, \u201cDiffuse irradiance\u201d and \u201cLong wavelength irradiance\u201d. Enter a component from the list.<\/p>\n\n\n\n

Variable Irradiance [W\/m2<\/sup>] (Optional)<\/h3>\n\n\n\n

The value refers to the diffuse irradiance setting to be measured. A distinction can be made between \u201cGlobal irradiance\u201d, \u201cDiffuse irradiance\u201c and \u201cLong wavelength irradiance\u201d. Enter a component from the list.<\/p>\n\n\n\n

Description of Parameters<\/strong><\/h2>\n\n\n\n

<\/p>\n\n\n\n

Description<\/h3>\n\n\n\n

The \u201cdescription\u201d value enables the user to assign controllers any name of number. Polysun assigns a consecutive number as a standard feature as different controllers are added chronologically in the hydraulic system<\/p>\n\n\n\n

Sign of Output<\/h3>\n\n\n\n

The term \u201cNormal\u201c means that digital output signals are controlled as intended in the switching logics. (Example: if X1>Fixed value or if X1>X2 the output of pump 1 is positive). The term \u201cInverted\u201d means that the digital output signals are multiplied by -1. (Example: if X1>X2 the output Switch 1 is equal to zero).<\/p>\n\n\n\n

Definition of Irradiance Setting<\/h3>\n\n\n\n
    \n
  • Fixed value
    If the irradiance measured by the irradiance sensor exceeds the specified fixed value the controller output switches to \u201con\u201c.<\/li>\n\n\n\n
  • Variable value
    If the irradiance measured by the irradiance sensor exceeds the specified variable value the controller output switches to \u201con\u201c.<\/li>\n<\/ul>\n\n\n\n

    Use of Hysteresis<\/h3>\n\n\n\n

    If the hysteresis is used the following applies<\/p>\n\n\n\n

      \n
    • Cut-in hysteresis  [W\/m2<\/sup>]
      If the irradiance measured by the irradiance sensor exceeds the reference value by the specified hysteresis the controller output switches to \u201don \u201c.<\/li>\n\n\n\n
    • Cut-off hysteresis  [W\/m2<\/sup>]
      If the irradiance measured by the irradiance sensor drops below the reference value by the specified hysteresis the controller output switches to \u201doff\u201c.<\/li>\n<\/ul>\n\n\n\n

      Output Values<\/strong><\/h2>\n\n\n\n

      <\/p>\n\n\n\n

      Status Switch 1<\/h3>\n\n\n\n

      This digital output refers to the component to be controlled within the system.  Select the relevant component from the list. For the switching valve the \u201dOn\u201c status means that the output located on the switching valve and marked with \u201cX\u201c is \u201dopen\u201d.<\/p>\n\n\n\n

      Status Switch 2 (Optional)<\/h3>\n\n\n\n

      This digital output works just like output Status Switch 1. Select if required the component to be controlled from the list. <\/p>\n\n\n\n

      Overview of Control-Dependencies<\/strong><\/h2>\n\n\n\n

      Table: Control-dependencies of the irradiance controller<\/p>\n\n\n\n

      Outputs<\/td>Parameter<\/td>Tip<\/td>Inputs<\/td>Function<\/td><\/tr>
      Y1: Status Switch 1 Y1 = Y2 Y2: Status Switch 2<\/td>Fixed value<\/td>If hysteresis is applied cut-in and cut-off criteria vary <\/td>X1: Irradiance sensor<\/td>Y1=0 if X1 < Fixed value [W\/m2<\/sup>] Y1=1 if X1 > Fixed value [W\/m2<\/sup>]<\/td><\/tr>
      Y1=1 if X1 > Fixed value + Cut-in hysteresis[K]
      Y1=0 if X1 Fixed value + Cut-off hysteresis  [K]<\/td><\/tr>
      Y1: Status Switch 1 Y1 = Y2 Y2: Status Switch 2<\/td>Variable value<\/td>If hysteresis is applied cut-in and cut-off criteria vary <\/td>X1: Irradiance sensor X2: Variable irradiance<\/td>Y1=0 if X1 < X2 [W\/m2<\/sup>] Y1=1 if X1 > X2 [W\/m2<\/sup>]<\/td><\/tr>
      Y1=1 if X1 > X2 + Cut-in hysteresis [K]
      Y1=0 if X1 < X2 + Cut-off hysteresis[K]<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"author":19748,"featured_media":0,"parent":117529,"menu_order":52,"comment_status":"closed","ping_status":"closed","template":"","class_list":["post-117828","handbuch","type-handbuch","status-publish","hentry"],"acf":[],"yoast_head":"\nIrradiance Controller - POLYSUN<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/controllers\/irradiance-controller\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Irradiance Controller\" \/>\n<meta property=\"og:description\" content=\"The irradiance controller is a one-channel controller that regulates up to two components based...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/controllers\/irradiance-controller\/\" \/>\n<meta property=\"og:site_name\" content=\"POLYSUN\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/polysun.switzerland\/\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-25T15:03:30+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/handbuch\\\/polysun-designer\\\/controllers\\\/irradiance-controller\\\/\",\"url\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/handbuch\\\/polysun-designer\\\/controllers\\\/irradiance-controller\\\/\",\"name\":\"Irradiance Controller - 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