Starfire Energy, a Denver-based startup that makes parts for ammonia manufacturers, has raised $24 million in Series B funding, the company exclusively tells Axios.

Why it matters: Upstream company's like Starfire are attracting investors as demand for clean energy manufacturing grows, and as the processes become more complex.

Details: Samsung Ventures led the round and will gain a board seat as part of the deal.

How it works: Starfire Energy makes modules for ammonia production plants that can adjust the energy needed to account for variable power sources like solar and wind.

State of play: So-called green ammonia is on investors' radar as a potential alternative fuel for several forms of fossil fuels. But the production of ammonia often relies on traditional power, making it far from green.