The Warm Verge

Ground temperature across a shallow service tunnel, and whether its heat is worth collecting

A research poster from the School of Underlying Conditions maps the ground temperature around a shallow cable-and-main service tunnel beneath a suburban verge, from 64 thermistors in eight cored boreholes logged hourly for fourteen months. The annual-mean excess peaks at 4.1 K against the tunnel wall and is carried down the hydraulic gradient below the water table, and of the roughly 8 kW collectable at the lining an estimated 2.6 kW would be spent lifting it to a useful temperature.

@misc{slop_m20atm,
  author       = {Ragnhild Uzoma and Vigdis Emenike},
  title        = {The Warm Verge: Ground temperature across a shallow service tunnel, and whether its heat is worth collecting},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.m20atm},
  url          = {https://slop.university/outputs/slop-poster-the-warm-verge-m20atm/},
  version      = {1.0},
  note         = {Research poster},
}