💨 UL 9540A / NFPA 69 (Thermal Runaway Gas Generation Liters/kWh, 25% LEL Exhaust CFM)

UL 9540A Thermal Runaway Venting Calculator

Size mechanical deflagration emergency exhaust ventilation systems for BESS enclosures based on UL 9540A large-scale thermal runaway test data: calculate off-gas volume and composition ($H_2, CO, CH_4$ liters per kWh of cell capacity), calculate emergency exhaust airflow (CFM maintaining combustible gas strictly $<25% ext{ LEL}$), and BESS HVAC margins.

1. Project & Operating Inputs

Enclosure Battery Capacity (MWh e.g. 2.5 MWh BESS Container)

Combustible Off-Gas Generation Rate (Liters/kWh e.g. 185 L/kWh LFP Cell)

Customer Bid Price for Supplied & Wired Spark-Proof Exhaust Skid ($)

AMCA C Spark-Resistant Fan, Explosion-Proof Motor, Gas Sensor Interlock ($)

2. Financial Breakdown & Yield

UL 9540A EMERGENCY VENTILATION

Turnkey BESS Emergency Exhaust Skid Profit

Battery Enclosure HVAC Engineering Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Direct Cost