.Buildings.Fluid.DXSystems.Cooling.BaseClasses.PartialSurfaceCondition

Information

This partial block is the base class for Buildings.Fluid.DXSystems.Cooling.BaseClasses.ApparatusDewPoint and Buildings.Fluid.DXSystems.Cooling.BaseClasses.ApparatusDryPoint.

This block calculates the UA/c_p value, the bypass factor and the enthalpy difference across the coil. It uses the function Buildings.Fluid.DXSystems.Cooling.BaseClasses.Functions.speedShift for intermediate compressor speeds.

Implementation

For coils that only have discrete compressor speeds, this block does not do an interpolation for intermediate speeds. For coils with variable speed compressors, the computations are also done if the coil is off, as this ensures that the derivatives are continuous near the off conditions.

Contents

Name	Description
Medium	Medium model

Revisions

• June 26, 2018, by Michael Wetter:
  Replaced algorithm with equation.
• October 9, 2013 by Michael Wetter:
  Corrected invalid Modelica syntax.
• September 24, 2012 by Michael Wetter:
  Revised implementation.
• August 24, 2012, by Michael Wetter:
  Moved function from Buildings.Fluid.DXSystems.BaseClasses to Buildings.Fluid.DXSystems.Cooling.BaseClasses.Functions because the package Buildings.Fluid.DXSystems.BaseClasses already contains a block called SpeedShift which gives a clash in file names on file systems that do not distinguish between upper and lower case letters.
• August 1, 2012 by Kaustubh Phalak:
  First implementation.