Rune has raised $40 million in Series A funding as the energy infrastructure startup looks to address one of artificial intelligence’s increasingly significant constraints: finding enough electricity to power rapidly expanding compute infrastructure. The round was led by Spark Capital, with participation from Union Square Ventures, Lowercarbon Capital, Activate Capital, Committed Capital, Timeless Partners, and Logos Fund. The financing brings Rune’s total funding to $53.5 million. Alongside…