Speaker
Description
A novel CO₂-based architecture to recover, transport, and utilise surplus thermal energy across eight distributed sites is proposed as The Waste Heat Supply System (WHSS) for the Future Circular Collider (FCC).
The WHSS applies CO₂ in pressurised pipelines to transfer heat to decentralised heat pump - chiller units, where heat is delivered to end users and the CO₂ is liquefied.
Key optimisation strategies include: a) shifting FCC operational schedules to align with seasonal heat demand, b) transfer of surplus heat between surface sites via the tunnel, c) providing direct expansion AC with CO2 inside the entire tunnel, and d) buffering heat through Borehole Thermal Energy Storage (BTES) for weekly-to-seasonal load balancing.
Case studies show these strategies significantly reduce cooling tower demand and eliminate entirely cooling water transport and consumption. Compared to conventional water-based systems, the CO₂-based approach enables more compact infrastructure, higher delivery temperatures, and efficient heat recovery at multiple decentralised locations.
