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Minor doc update [ci skip]
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Buildings/Fluid/HeatPumps/ModularReversible/RefrigerantCycle/BaseClasses/TableData2DLoadDepSHC.mo

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@@ -718,6 +718,15 @@ modules <code>nUni</code>. Nevertheless, single-module systems can also be
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appropriately represented by setting <code>nUni = 1</code>.
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</p>
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<p>
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All kinds of capacity-modulation processes are supported, such as
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VFD-driven compressors, multiple on-off compressors, and single compressor cycling.
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The method used to interpolate capacity and power based on user-provided data is
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taken from
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<a href=\"modelica://Buildings.Fluid.HeatPumps.ModularReversible.RefrigerantCycle.BaseClasses.TableData2DLoadDep\">
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Buildings.Fluid.HeatPumps.ModularReversible.RefrigerantCycle.BaseClasses.TableData2DLoadDep</a>.
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Users should be familiar with this latter block before continuing with this documentation.
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</p>
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<p>
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The block implements the following functionalities.
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</p>
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<ul>
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Load balancing between the HW and CHW side
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</li>
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</ul>
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<p>
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The method used to interpolate capacity and power based on user-provided data is
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taken from
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<a href=\"modelica://Buildings.Fluid.HeatPumps.ModularReversible.RefrigerantCycle.BaseClasses.TableData2DLoadDep\">
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Buildings.Fluid.HeatPumps.ModularReversible.RefrigerantCycle.BaseClasses.TableData2DLoadDep</a>.
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Users should be familiar with this latter block before continuing with this documentation.
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</p>
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<h4>System and module operating mode</h4>
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<p>
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The block input <code>mode</code> allows switching between three system operating modes.
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module in SHC mode can be calculated as:</p>
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<code>Q&lt;Hea|Coo&gt;SetUniShc_flow = Q&lt;Hea|Coo&gt;Set_flow / (nUniShc + nUni&lt;Hea|Coo&gt;)</code>.
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<p>
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Now, in order to achieve load balancing between the CHW and HW sides for the
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In order to achieve load balancing between the CHW and HW sides for the
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subset of modules in SHC mode, the model assumes that these modules are loaded
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for the most demanding side, and that <b>a single module</b> can cycle between
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SHC and the corresponding single-mode operation.
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while another module compensates for it.
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The fundamental assumption of even load between modules therefore breaks down on
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the non-dominant side.
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In a real system where the modules are hydronically balanced, this imbalance yields
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In a real system where the modules are hydronically balanced, this load imbalance yields
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varying leaving temperatures across modules.
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In the worst case, the deviation from setpoint is <code>SPLR / 2</code> times the
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design &Delta;T.

Buildings/Fluid/HeatPumps/ModularReversible/TableData2DLoadDepSHC.mo

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@@ -352,6 +352,10 @@ where the capacity and power are interpolated from manufacturer
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data along the source and sink temperature and the part load ratio (PLR).<sup>1</sup>
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</p>
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<p>
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All kinds of capacity-modulation processes are supported, such as VFD-driven compressors,
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multiple on-off compressors, and single compressor cycling.
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</p>
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<p>
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The model supports modeling both modular (<code>nUni > 1</code>) and
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single-unit (<code>nUni = 1</code>) systems.
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When modeling modular systems, the staging logic for multiple modules is

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