What are ground temperatures?
Defining ground temperatures (Site:GroundTemperature:BuildingSurface)
By default, ground temperatures are set to 18 deg C constant throughout the year. This is the simplest modelling approach.
1. Constant default ground temperatures (one value)
2. 2 deg C above average zone air temperature (monthly)
3. Detailed ground temperature modelling (monthly)
The EnergyPlus InputOutputReference.pdf states (p. 87):
Other ground temperatures
Other ground temperatures are mainly used for different ground heat exchangers.
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Ground Heat Exchanger |
Site:GroundTemperature |
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Surface |
Site:GroundTemperature:Shallow |
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Pond |
Site:GroundTemperature:Deep |
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System (vertical) |
Site:GroundTemperature:Undisturbed - FiniteDifference - KusudaAchenbach |
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HorizontalTrench |
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Slinky |
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Pipe:Underground |
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Modelling ground temperatures (Site:GroundTemperature:BuildingSurface)
The first two can be easily defined in Simergy (first one is the default), second option can be defined in the location template (either taking temperature setpoints into account or adding report variables to actually report monthly temperatures in the zones):
Site Workspace
1. Select the Building Site in the tree
2. Click on the Edit button next to Location Template
3. Click on the … Button
The detailed ground modelling is not directly supported in Simergy 4.0 yet but is on the enhancement list.