Episode Details

Roughly half of all global energy input ends up as waste heat, and the headline numbers say it's the world's largest untapped energy source. The honest numbers say only six to nine percent is economically worth recovering — and the gap between those two figures is the whole story. This episode walks through the thermodynamics of temperature and distance, then visits the two cities that actually built the infrastructure: Copenhagen's 120-year-old district heating habit, including a ski slope on a waste incinerator, and Stockholm's open market where data centers sell surplus heat on temperature-indexed contracts. Along the way: why the biggest waste-heat source is the worst recovery target, why industry quietly beats power generation, and why heat pumps aren't a paradox. Key sources: • Danfoss Impact No. 9, Waste heat: A competitive advantage for energy resilience, industrial growth, and decarbonization — https://assets.danfoss.com/documents/latest/605945/BE573832583325en-000101.pdf • Firth, Zhang & Yang, Quantification of Global Waste Heat and Its Environmental Effects, University of Oxford / *Renewable and Sustainable Energy Reviews* (2016) — https://ora.ox.ac.uk/objects/uuid:954f2732-a89d-43e4-95e7-9914a2c0eb36 • McKinsey, Waste not: Unlocking the potential of waste heat recovery, 2023-11-30 — https://www.mckinsey.com/capabilities/sustainability/our-insights/waste-not-unlocking-the-potential-of-waste-heat-recovery Episode 5882 — myweirdprompts.com/n/5882 (permanent short link: myweirdprompts.com/632191)