30 lines
1.1 KiB
JSON
30 lines
1.1 KiB
JSON
|
{
|
|||
|
|
"title": "Storm Lake Winter Propane Survival Calculator",
|
|||
|
|
"author": "Barbara Cintron",
|
|||
|
|
"location": "Storm Lake, Iowa (Zone 4b)",
|
|||
|
|
"version": "1.0",
|
|||
|
|
"citation": {
|
|||
|
|
"heating_base_temp_F": 65,
|
|||
|
|
"stormlake_avg_extreme_min_F": -25,
|
|||
|
|
"propane_energy_content_Btu_per_gallon": 91500,
|
|||
|
|
"typical_household_daily_consumption_gallons": {
|
|||
|
|
"mild": 1.2,
|
|||
|
|
"moderate": 2.8,
|
|||
|
|
"severe": 5.4
|
|||
|
|
},
|
|||
|
|
"blizzard_duration_hours": 72,
|
|||
|
|
"design_outdoor_temp_F": -30,
|
|||
|
|
"indoor_setpoint_F": 68,
|
|||
|
|
"house_envelope_factor": 0.85,
|
|||
|
|
"notes": "Consumption rates derived from Buena Vista County Cooperative Extension 2024 Winter Energy Survey, adjusted for Zone 4b extremes. House envelope factor accounts for typical 1970s ranch construction insulation degradation."
|
|||
|
|
},
|
|||
|
|
"formula": {
|
|||
|
|
"description": "Propane required = (consumption_rate_gal/day × duration_days) / house_efficiency",
|
|||
|
|
"variables": {
|
|||
|
|
"consumption_rate_gal_day": "Function of delta-T between indoor setpoint and outdoor temp",
|
|||
|
|
"duration_days": "Blizzard event length",
|
|||
|
|
"house_efficiency": "Envelope integrity multiplier"
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|