ATES & Industrial Heat Pump Integration: Doublet Hydraulics, VDI 4640 Plumes & BEW 45%
Dupuit-Thiem drawdown hydraulics, VDI 4640 seasonal thermal plume recovery (η_th ≥ 82%), industrial heat pump COP ≥ 5.2, and German BEW / US IRA 48C grant financing.