r.green.gshp.technical - GRASS GIS manual

NAME

r.green.gshp.technical - Calculate the Ground Source Heat Pump technical potential using the ASHRAE method.

KEYWORDS

SYNOPSIS

r.green.gshp.technical

r.green.gshp.technical --help

r.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 λ [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 [°C]
ground_temp_value=double: Value with the initial ground temperature T0 [°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 [°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]

DESCRIPTION
NOTES
EXAMPLES
SEE ALSO
AUTHORS
REFERENCES

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