IIT Madras–incubated Wankel Energy has raised a $1M pre-seed round. They’re developing a patented rotary device called Phoenix Expander that captures energy dissipated in pressure-reducing valves. PVRs dissipate energy equivalent to nearly ₹66,000 crore every year ($7.4B). Each Phoenix Expander can recover up to 160 kW of instantaneous power, and will save up to ₹50 lakh annually.