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Calculation updates

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fraxle
2026-05-15 13:46:11 +01:00
parent ef96d5f1c8
commit 153029c645
4 changed files with 147 additions and 91 deletions
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assets/js/utils.js
+16 -10
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@@ -127,18 +127,24 @@ export function burnLabel(mins) {
// ═══════════════════════════════════════════════════════════════════
// VEHICLE TYPES — presets for the cabin heat model.
// ───────────────────────────────────────────────────────────────────
// Each entry tweaks the three physical levers in calcVehicleInteriorTemp:
// albedo — how much solar the bodywork reflects (0 = black, 1 = mirror)
// glazingArea — relative side-window glass area (1.0 = typical car)
// hCabinLoss — how easily heat escapes the cabin (W/m²K); lower = hotter
// Motorhomes have thicker insulation → lower loss
// Each entry tweaks the physical levers in calcVehicleInteriorTemp:
// albedo — how much solar the bodywork reflects (0 = black, 1 = mirror)
// glazingArea — relative sun-exposed glass area (1.0 = typical car)
// bodyU — effective body/panel conductance into the cabin. Cars are
// thin metal/glass boxes; motorhomes/caravans have insulated
// sandwich panels, commonly around 25–35 mm thick.
// hCabinLoss — effective heat rejection/infiltration from the cabin air.
// thermalMass — lower values mean the interior warms more slowly in the hour.
// retainedWarmth — occupied insulated living spaces hold heat from previous
// hours, people, appliances, and background heating.
// internalGain — small living-space warmth boost when closed up.
// ═══════════════════════════════════════════════════════════════════
export const VEHICLE_TYPES = {
car: { name: 'Car / Hatchback', albedo: 0.25, glazingArea: 1.0, hCabinLoss: 2.0 },
mpv: { name: 'MPV / People Carrier', albedo: 0.25, glazingArea: 1.3, hCabinLoss: 2.0 },
suv: { name: 'SUV / 4×4', albedo: 0.22, glazingArea: 1.1, hCabinLoss: 1.9 },
motorhome: { name: 'Motorhome / Campervan', albedo: 0.35, glazingArea: 0.6, hCabinLoss: 1.2 },
caravan: { name: 'Caravan (towed)', albedo: 0.40, glazingArea: 0.4, hCabinLoss: 1.0 },
car: { name: 'Car / Hatchback', albedo: 0.25, glazingArea: 1.0, bodyU: 4.0, hCabinLoss: 20, thermalMass: 1.00, retainedWarmth: false, internalGain: 0.0 },
mpv: { name: 'MPV / People Carrier', albedo: 0.25, glazingArea: 1.3, bodyU: 4.0, hCabinLoss: 20, thermalMass: 1.00, retainedWarmth: false, internalGain: 0.0 },
suv: { name: 'SUV / 4x4', albedo: 0.22, glazingArea: 1.1, bodyU: 3.8, hCabinLoss: 19, thermalMass: 0.95, retainedWarmth: false, internalGain: 0.0 },
motorhome: { name: 'Motorhome / Campervan', albedo: 0.55, glazingArea: 0.25, bodyU: 0.9, hCabinLoss: 12, thermalMass: 0.35, retainedWarmth: true, internalGain: 1.2 },
caravan: { name: 'Caravan (towed)', albedo: 0.60, glazingArea: 0.22, bodyU: 0.8, hCabinLoss: 11, thermalMass: 0.35, retainedWarmth: true, internalGain: 1.2 },
};
// ═══════════════════════════════════════════════════════════════════