{"api_version":"v1","backend":"CoolProp","backend_selection":{"effective":"coolprop","effective_label":"CoolProp","requested":"auto","requested_label":"Auto"},"backend_version":{"available":true,"backend":"CoolProp","version":"8.0.0"},"calculation_id":"fluid_4222493fed84423a8e53358aa75c56da","fluid":{"backend":"coolprop","coolprop_name":"Methane","default_pressure":"1","default_pressure_unit":"Atm","default_temperature":"15","default_temperature_unit":"Celsius","formula":"CH4","group":"Gases","key":"methane","name":"Methane","quality":{"badge_class":"source-quality-reference","class":"reference_backend","classification":"reference_backend","confidence_label":"Reference-grade","confidence_level":"reference_grade","design_release_allowed":true,"design_release_ready":true,"label":"Reference backend","preliminary_sizing_allowed":true,"rough_exploration_only":false,"source_family":"coolprop","source_family_label":"CoolProp","summary":"Reference-grade - CoolProp","warning":"","warning_required":false},"source":{"citation":"CoolProp open-source property backend; fluid model: Methane.","components":[],"family":"coolprop","family_label":"CoolProp","license_label":"Open","license_status":"open","note":"CoolProp open-source property backend; fluid model: Methane.","review":{"checked":false,"date":"2026-06-28","reviewer":"app.py metadata defaults","scope":"","status":""}},"source_metadata":{"components":[],"confidence_level":"reference_grade","last_reviewed":"2026-06-28","license_status":"open","notes":"","review_checked":false,"review_scope":"","review_status":"","reviewer":"app.py metadata defaults","source_citation":"CoolProp open-source property backend; fluid model: Methane.","source_family":"coolprop","source_note":"CoolProp open-source property backend; fluid model: Methane.","uncertainty":"Reference-grade for supported state points; backend errors or warnings indicate reduced confidence.","valid_phase_or_condition":"Backend-calculated fluid state.","valid_pressure_range":{"max":null,"min":null,"note":"Backend equation-of-state domain; pressure limits are fluid/model dependent.","unit":""},"valid_temperature_range":{"max":null,"min":null,"note":"Backend-defined range when available.","unit":"K"}},"source_quality":{"badge_class":"source-quality-reference","class":"reference_backend","classification":"reference_backend","confidence_label":"Reference-grade","confidence_level":"reference_grade","design_release_allowed":true,"design_release_ready":true,"label":"Reference backend","preliminary_sizing_allowed":true,"rough_exploration_only":false,"source_family":"coolprop","source_family_label":"CoolProp","summary":"Reference-grade - CoolProp","warning":"","warning_required":false},"validity":{"last_reviewed":"2026-06-28","notes":"","phase_or_condition":"Backend-calculated fluid state.","pressure_range":{"max":null,"min":null,"note":"Backend equation-of-state domain; pressure limits are fluid/model dependent.","unit":""},"review_checked":false,"review_scope":"","review_status":"","reviewer":"app.py metadata defaults","source_note":"CoolProp open-source property backend; fluid model: Methane.","temperature_range":{"max":null,"min":null,"note":"Backend-defined range when available.","unit":"K"},"uncertainty":"Reference-grade for supported state points; backend errors or warnings indicate reduced confidence."},"warnings":[]},"inputs":{"phase_selection":{"effective":"auto","effective_label":"Auto equilibrium","requested":"default","requested_label":"Default"},"pressure":{"bar":1.01325,"input_unit":"Atm","input_value":1.0,"pascal":101325.0},"temperature":{"celsius":15.0,"input_unit":"Celsius","input_value":15.0,"kelvin":288.15}},"internal_state":{"pressure":{"dimension":"pressure","unit":"Pa","unit_system":"si","value":101325.0},"temperature":{"dimension":"temperature","unit":"K","unit_system":"si","value":288.15}},"library_version":"1.0.2","limits":{"pressure_critical_pa":4599200.474282439,"temperature_critical_k":190.56400265128698,"temperature_max_k":625.0,"temperature_min_k":90.6941},"ok":true,"output_unit_system":{"key":"si","label":"Common SI"},"outputs":{"pressure":{"dimension":"pressure","display":{"dimension":"pressure","unit":"Pa","unit_system":"si","value":101325.0},"label":"Pressure","raw":{"dimension":"pressure","unit":"Pa","unit_system":"si","value":101325.0},"raw_unit":"Pa","raw_value":101325.0,"unit":"Pa","unit_system":"si","value":101325.0},"temperature":{"dimension":"temperature","display":{"dimension":"temperature","unit":"K","unit_system":"si","value":288.15},"label":"Temperature","raw":{"dimension":"temperature","unit":"K","unit_system":"si","value":288.15},"raw_unit":"K","raw_value":288.15,"unit":"K","unit_system":"si","value":288.15}},"phase":"supercritical_gas","phase_selection":{"effective":"auto","effective_label":"Auto equilibrium","requested":"default","requested_label":"Default"},"properties":{"cp":{"dimension":"specific_heat_capacity","display":{"dimension":"specific_heat_capacity","unit":"J/kg/K","unit_system":"si","value":2209.98216601303},"label":"Specific heat capacity, cp","raw":{"dimension":"specific_heat_capacity","unit":"J/kg/K","unit_system":"si","value":2209.98216601303},"raw_unit":"J/kg/K","raw_value":2209.98216601303,"unit":"J/kg/K","unit_system":"si","value":2209.98216601303},"cv":{"dimension":"specific_heat_capacity","display":{"dimension":"specific_heat_capacity","unit":"J/kg/K","unit_system":"si","value":1686.4562766463973},"label":"Specific heat capacity, cv","raw":{"dimension":"specific_heat_capacity","unit":"J/kg/K","unit_system":"si","value":1686.4562766463973},"raw_unit":"J/kg/K","raw_value":1686.4562766463973,"unit":"J/kg/K","unit_system":"si","value":1686.4562766463973},"density":{"dimension":"density","display":{"dimension":"density","unit":"kg/m^3","unit_system":"si","value":0.6798343282369096},"label":"Density","raw":{"dimension":"density","unit":"kg/m^3","unit_system":"si","value":0.6798343282369096},"raw_unit":"kg/m^3","raw_value":0.6798343282369096,"unit":"kg/m^3","unit_system":"si","value":0.6798343282369096},"dynamic_viscosity":{"dimension":"dynamic_viscosity","display":{"dimension":"dynamic_viscosity","unit":"Pa*s","unit_system":"si","value":1.0876766177969866e-05},"label":"Dynamic viscosity","raw":{"dimension":"dynamic_viscosity","unit":"Pa*s","unit_system":"si","value":1.0876766177969866e-05},"raw_unit":"Pa*s","raw_value":1.0876766177969866e-05,"unit":"Pa*s","unit_system":"si","value":1.0876766177969866e-05},"gas_constant":{"dimension":"specific_gas_constant","display":{"dimension":"specific_gas_constant","unit":"J/kg/K","unit_system":"si","value":518.2675479438277},"label":"Specific gas constant","raw":{"dimension":"specific_gas_constant","unit":"J/kg/K","unit_system":"si","value":518.2675479438277},"raw_unit":"J/kg/K","raw_value":518.2675479438277,"unit":"J/kg/K","unit_system":"si","value":518.2675479438277},"heat_capacity_ratio":{"dimension":"dimensionless_ratio","display":{"dimension":"dimensionless_ratio","unit":"-","unit_system":"si","value":1.3104295656023115},"label":"Heat capacity ratio","raw":{"dimension":"dimensionless_ratio","unit":"-","unit_system":"si","value":1.3104295656023115},"raw_unit":"-","raw_value":1.3104295656023115,"unit":"-","unit_system":"si","value":1.3104295656023115},"kinematic_viscosity":{"dimension":"kinematic_viscosity","display":{"dimension":"kinematic_viscosity","unit":"m^2/s","unit_system":"si","value":1.5999142329540495e-05},"label":"Kinematic viscosity","raw":{"dimension":"kinematic_viscosity","unit":"m^2/s","unit_system":"si","value":1.5999142329540495e-05},"raw_unit":"m^2/s","raw_value":1.5999142329540495e-05,"unit":"m^2/s","unit_system":"si","value":1.5999142329540495e-05},"molar_mass":{"dimension":"molar_mass","display":{"dimension":"molar_mass","unit":"kg/mol","unit_system":"si","value":0.0160428},"label":"Molar mass","raw":{"dimension":"molar_mass","unit":"kg/mol","unit_system":"si","value":0.0160428},"raw_unit":"kg/mol","raw_value":0.0160428,"unit":"kg/mol","unit_system":"si","value":0.0160428},"prandtl":{"dimension":"dimensionless_number","display":{"dimension":"dimensionless_number","unit":"-","unit_system":"si","value":0.7336226837028522},"label":"Prandtl number","raw":{"dimension":"dimensionless_number","unit":"-","unit_system":"si","value":0.7336226837028522},"raw_unit":"-","raw_value":0.7336226837028522,"unit":"-","unit_system":"si","value":0.7336226837028522},"speed_of_sound":{"dimension":"speed","display":{"dimension":"speed","unit":"m/s","unit_system":"si","value":441.50230350121484},"label":"Speed of sound","raw":{"dimension":"speed","unit":"m/s","unit_system":"si","value":441.50230350121484},"raw_unit":"m/s","raw_value":441.50230350121484,"unit":"m/s","unit_system":"si","value":441.50230350121484},"thermal_conductivity":{"dimension":"thermal_conductivity","display":{"dimension":"thermal_conductivity","unit":"W/m/K","unit_system":"si","value":0.03276542534901127},"label":"Thermal conductivity","raw":{"dimension":"thermal_conductivity","unit":"W/m/K","unit_system":"si","value":0.03276542534901127},"raw_unit":"W/m/K","raw_value":0.03276542534901127,"unit":"W/m/K","unit_system":"si","value":0.03276542534901127},"thermal_diffusivity":{"dimension":"thermal_diffusivity","display":{"dimension":"thermal_diffusivity","unit":"m^2/s","unit_system":"si","value":2.18084073529286e-05},"label":"Thermal diffusivity","raw":{"dimension":"thermal_diffusivity","unit":"m^2/s","unit_system":"si","value":2.18084073529286e-05},"raw_unit":"m^2/s","raw_value":2.18084073529286e-05,"unit":"m^2/s","unit_system":"si","value":2.18084073529286e-05}},"quality":{"badge_class":"source-quality-reference","class":"reference_backend","classification":"reference_backend","confidence_label":"Reference-grade","confidence_level":"reference_grade","design_release_allowed":true,"design_release_ready":true,"label":"Reference backend","preliminary_sizing_allowed":true,"rough_exploration_only":false,"source_family":"coolprop","source_family_label":"CoolProp","summary":"Reference-grade - CoolProp","warning":"","warning_required":false},"source":{"citation":"CoolProp open-source property backend; fluid model: Methane.","components":[],"family":"coolprop","family_label":"CoolProp","license_label":"Open","license_status":"open","note":"CoolProp open-source property backend; fluid model: Methane.","review":{"checked":false,"date":"2026-06-28","reviewer":"app.py metadata defaults","scope":"","status":""}},"source_metadata":{"components":[],"confidence_level":"reference_grade","last_reviewed":"2026-06-28","license_status":"open","notes":"","review_checked":false,"review_scope":"","review_status":"","reviewer":"app.py metadata defaults","source_citation":"CoolProp open-source property backend; fluid model: Methane.","source_family":"coolprop","source_note":"CoolProp open-source property backend; fluid model: Methane.","uncertainty":"Reference-grade for supported state points; backend errors or warnings indicate reduced confidence.","valid_phase_or_condition":"Backend-calculated fluid state.","valid_pressure_range":{"max":null,"min":null,"note":"Backend equation-of-state domain; pressure limits are fluid/model dependent.","unit":""},"valid_temperature_range":{"max":625.0,"min":90.6941,"note":"Backend-defined range when available.","unit":"K"}},"source_quality":{"badge_class":"source-quality-reference","class":"reference_backend","classification":"reference_backend","confidence_label":"Reference-grade","confidence_level":"reference_grade","design_release_allowed":true,"design_release_ready":true,"label":"Reference backend","preliminary_sizing_allowed":true,"rough_exploration_only":false,"source_family":"coolprop","source_family_label":"CoolProp","summary":"Reference-grade - CoolProp","warning":"","warning_required":false},"unit_contract":{"api_rule":"Every converted API value keeps raw SI metadata plus display metadata.","display_unit_system":{"key":"si","label":"Common SI"},"internal_fluid_properties":"SI base/derived units per property raw metadata.","internal_fluid_state":{"pressure":{"dimension":"pressure","unit":"Pa"},"temperature":{"dimension":"temperature","unit":"K"}},"internal_material_properties":"SI engineering units stored in data records.","unit_engine":"Pint-backed allowlist at API/UI boundaries; internal calculations remain SI floats."},"validity":{"last_reviewed":"2026-06-28","notes":"","phase_or_condition":"Backend-calculated fluid state.","pressure_range":{"max":null,"min":null,"note":"Backend equation-of-state domain; pressure limits are fluid/model dependent.","unit":""},"review_checked":false,"review_scope":"","review_status":"","reviewer":"app.py metadata defaults","source_note":"CoolProp open-source property backend; fluid model: Methane.","temperature_range":{"max":625.0,"min":90.6941,"note":"Backend-defined range when available.","unit":"K"},"uncertainty":"Reference-grade for supported state points; backend errors or warnings indicate reduced confidence."},"warnings":[]}
