Uloženo v:
| Hlavní autor: | |
|---|---|
| Médium: | Recurso digital |
| Jazyk: | |
| Vydáno: |
Zenodo
2026
|
| On-line přístup: | https://doi.org/10.5281/zenodo.20024132 |
| Tagy: |
Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
|
Obsah:
- <p>Version 3 of the PAO Ecological Truck corrects a critical sizing error and adds two major systems that turn waste heat into revenue.</p> <p> </p> <p> Critical correction – buffer battery:</p> <p>v2 specified 120 kWh Na-ion buffer (copied from BEV assumptions). v3 recalculates from actual hill-climbing duty cycle: 45‑55 kWh nominal. Result: -538 kg battery mass, +€3,850 lower cost, +€10,700/year extra payload revenue.</p> <p> </p> <p> Winter heating (free):</p> <p>PEMFC (250 kW, 58% efficiency) produces 181 kW of waste heat at 60‑80°C. A 50 kg lauric acid PCM (Tm=44°C, 60 kWh thermal storage) captures this heat. Overnight cabin heating for 5‑8 hours without any extra fuel. Saves €1,875/year diesel heater fuel.</p> <p> </p> <p>☀️ Summer refrigeration (free):</p> <p>Same 181 kW waste heat drives a single‑effect absorption chiller (COP=0.65) → 118 kW cooling. Caprylic acid PCM (Tm=16°C, Δ=0.029★★, PAO‑optimal) buffers cold for cargo hold. Zero diesel for refrigeration. Saves €12,000/year.</p> <p> </p> <p> PAO analysis:</p> <p>- Platinum catalyst (Pt, M=195.08 Da) sits at N=82.020, Δ=0.020★★ — controlled‑reactivity zone, explains its ORR activity.</p> <p>- Caprylic acid C8H16O2 (M=144.21, N=77.329, Δ=0.029★★) is the strongest resonance among C8 fatty acids, ideal for cooling PCM.</p> <p>- NaTFSI electrolyte (N=88.876, near N=89★) remains the optimal Na‑ion chemistry.</p> <p> </p> <p> v3 specifications vs v2:</p> <p>- Buffer: 50 kWh (was 120 kWh)</p> <p>- Battery mass: 385 kg (was 923 kg)</p> <p>- Payload advantage over diesel: +4,938 kg (was +4,400 kg)</p> <p>- Annual operating saving vs diesel: €55,875 (was €42,000)</p> <p>- Payback time (premium over diesel): 4.8 years</p> <p> </p> <p>All systems are integrated. The truck uses one hydrogen tank (35 kg, 700 bar), one PEMFC, one absorption chiller, two PCM stores (lauric + caprylic), and the corrected Na‑ion buffer. No diesel for auxiliaries. Zero tailpipe CO₂.</p> <p> </p> <p>This is not a new truck. It is the same v2 design, but with a miscalculation fixed and waste heat finally used.</p> <p> </p> <p>Open research. No patents. CC BY 4.0.</p>