From a55cb727ea80d440fc2464a45a661ccb28860f16 Mon Sep 17 00:00:00 2001 From: An Pham Date: Sun, 29 Sep 2024 22:10:31 -0600 Subject: [PATCH] updated REopt's GHX defaults to match with other NREL models --- ghpghx/models.py | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/ghpghx/models.py b/ghpghx/models.py index 1f3f211fa..c10498a1f 100644 --- a/ghpghx/models.py +++ b/ghpghx/models.py @@ -26,16 +26,16 @@ class GHPGHXInputs(models.Model): # Single value inputs borehole_depth_ft = models.FloatField(blank=True, - default=400.0, validators=[MinValueValidator(10.0), MaxValueValidator(600.0)], + default=443.0, validators=[MinValueValidator(10.0), MaxValueValidator(600.0)], help_text="Vertical depth of each borehole [ft]") ghx_header_depth_ft = models.FloatField(blank=True, - default=4.0, validators=[MinValueValidator(0.1), MaxValueValidator(50.0)], + default=6.6, validators=[MinValueValidator(0.1), MaxValueValidator(50.0)], help_text="Depth under the ground of the GHX header pipe [ft]") borehole_spacing_ft = models.FloatField(blank=True, default=20.0, validators=[MinValueValidator(1.0), MaxValueValidator(100.0)], help_text="Distance from the centerline of each borehole to the centerline of its adjacent boreholes [ft]") borehole_diameter_inch = models.FloatField(blank=True, - default=5.0, validators=[MinValueValidator(0.25), MaxValueValidator(24.0)], + default=6.0, validators=[MinValueValidator(0.25), MaxValueValidator(24.0)], help_text="Diameter of the borehole/well drilled in the ground [in]") borehole_choices = [("rectangular", "rectangular"), ("hexagonal", "hexagonal")] @@ -49,10 +49,10 @@ class GHPGHXInputs(models.Model): default=0.16, validators=[MinValueValidator(0.01), MaxValueValidator(5.0)], help_text="Wall thickness of the GHX pipe [in]") ghx_pipe_thermal_conductivity_btu_per_hr_ft_f = models.FloatField(blank=True, - default=0.25, validators=[MinValueValidator(0.01), MaxValueValidator(10.0)], + default=0.23, validators=[MinValueValidator(0.01), MaxValueValidator(10.0)], help_text="Thermal conductivity of the GHX pipe [Btu/(hr-ft-degF)]") ghx_shank_space_inch = models.FloatField(blank=True, - default=2.5, validators=[MinValueValidator(0.5), MaxValueValidator(100.0)], + default=1.27, validators=[MinValueValidator(0.5), MaxValueValidator(100.0)], help_text="Distance between the centerline of the upwards and downwards u-tube legs [in]") # Default for ground_thermal_conductivity_btu_per_hr_ft_f varies by ASHRAE climate zone ground_thermal_conductivity_btu_per_hr_ft_f = models.FloatField(blank=True, @@ -65,7 +65,7 @@ class GHPGHXInputs(models.Model): default=0.211, validators=[MinValueValidator(0.01), MaxValueValidator(5.0)], help_text="Specific heat of the ground surrounding the borehole field") grout_thermal_conductivity_btu_per_hr_ft_f = models.FloatField(blank=True, - default=1.0, validators=[MinValueValidator(0.01), MaxValueValidator(10.0)], + default=0.75, validators=[MinValueValidator(0.01), MaxValueValidator(10.0)], help_text="Thermal conductivity of the grout material in a borehole [Btu/(hr-ft-degF)]") ghx_fluid_specific_heat_btu_per_lb_f = models.FloatField(blank=True, default=1.0, validators=[MinValueValidator(0.1), MaxValueValidator(10.0)],