Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.
NAME
r.green.gshp.technical - Calculate the Ground Source Heat Pump technical potential using the ASHRAE method.KEYWORDS
raster, geothermal, renewable energySYNOPSIS
r.green.gshp.technical
r.green.gshp.technical --helpr.green.gshp.technical [-d] ground_conductivity=name [ground_diffusivity_rast=name] [ground_diffusivity_value=double] [ground_temp_rast=name] [ground_temp_value=double] [g_loads_6h_rast=name] [g_loads_6h_value=double] [g_loads_1m_rast=name] [g_loads_1m_value=double] [g_loads_1y_rast=name] [g_loads_1y_value=double] [fluid_capacity=double] [fluid_massflow=double] [fluid_inlettemp=double] [bh_radius=double] [bh_convection=double] [bh_resistence=double] [pipe_inner_radius=double] [pipe_outer_radius=double] [pipe_distance=double] [k_pipe=double] [k_grout=double] [field_distance=double] [field_number=integer] [field_ratio=double] [bhe_length=name] [bhe_field_length=name] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- -d
- Debug with intermediate maps
- --overwrite
- Allow output files to overwrite existing files
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- ground_conductivity=name [required]
- Raster with depth-averaged ground thermal conductivity lambda [W m-1 K-1]
- ground_diffusivity_rast=name
- Raster with depth-averaged ground diffusivity [m2 day-1]
- ground_diffusivity_value=double
- Value with depth-averaged ground diffusivity [m2 day-1]
- Default: 0.086
- ground_temp_rast=name
- Raster with the initial ground temperature T0 [degrees C]
- ground_temp_value=double
- Value with the initial ground temperature T0 [degrees C]
- Default: 10.
- g_loads_6h_rast=name
- Peak of the maximum 6 hourly ground loads [W]
- g_loads_6h_value=double
- Peak of the maximum 6 hourly ground loads [W]
- Default: 60.
- g_loads_1m_rast=name
- Month with the maximum ground loads [W]
- g_loads_1m_value=double
- Month with the maximum ground loads [W]
- Default: 15.
- g_loads_1y_rast=name
- Yearly average ground loads [W]
- g_loads_1y_value=double
- Yearly average ground loads [W]
- Default: 5.
- fluid_capacity=double
- Fluid capacity Cp [J kg-1 K-1]
- Default: 4200.
- fluid_massflow=double
- Fluid massflow [kg s-1 kW-1]
- Default: 0.050
- fluid_inlettemp=double
- Inlet temperature [degrees C]
- Default: 2.
- bh_radius=double
- Borehole radius [m]
- Default: 0.06
- bh_convection=double
- Internal convection coefficient [W m-2 K-1]
- Default: 1.52
- bh_resistence=double
- Borehole thermal resistence [m K W-1]
- Default: nan
- pipe_inner_radius=double
- Borehole pipe inner radius [m]
- Default: 0.01365
- pipe_outer_radius=double
- Borehole pipe outer radius [m]
- Default: 0.0167
- pipe_distance=double
- Center-to-center distance between pipes [m]
- Default: 0.0511
- k_pipe=double
- Pipe thermal conductivity [W m-1 K-1]
- Default: 0.42
- k_grout=double
- Grout thermal conductivity [W m-1 K-1]
- Default: 1.52
- field_distance=double
- Distance between boreholes heat exchanger
- Default: 6.1
- field_number=integer
- Number of borehole heat exchanger
- Default: 2
- field_ratio=double
- Borefield aspect ratio
- Default: 1.2
- bhe_length=name
- Name of output raster map with the geothermal length of the BHE [m]
- bhe_field_length=name
- Name of output raster map with the geothermal length of the BHE field [m]
Table of contents
DESCRIPTION
r.green.gshp.technical calculates the lenght of the borehole for Groud Source Heat Pump plants.NOTES
The required inputs are the ground source conductivity and the ground loads.EXAMPLES
python r.green.gshp.technical.py --overwrite ground_conductivity=g_conductivity ground_diffusivity_rast=g_diffusivity ground_temp_rast=g_temperature g_loads_6h_rast=g_loads_6h g_loads_1m_rast=g_loads_1m g_loads_1y_rast=g_loads_1y fluid_capacity=4000. fluid_massflow=0.074 fluid_inlettemp=4.44 bh_radius=0.054 pipe_inner_radius=0.01365 pipe_outer_radius=0.0167 bh_convection=1000. pipe_distance=0.0471 k_pipe=0.45 k_grout=1.73 field_distance=6.1 field_number=120 field_ratio=1.2 bhe_length=len_bhe bhe_field_length=len_bhe_field -d --o
SEE ALSO
r.green.gshp.technicalAUTHORS
Pietro Zambelli (Eurac Research, Bolzano, Italy)REFERENCES
SOURCE CODE
Available at: r.green.gshp.technical source code (history)
Latest change: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55
Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.
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