Calculation of Borehole Thermal Resistance

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKapitel samlingsverk

Abstract

The borehole thermal resistance – that is, the thermal resistance between the fluid in the U-tube and the borehole wall – is a key performance characteristic of a closed-loop borehole ground heat exchanger. Lower borehole thermal resistance leads to better system performance. Since the original identification of the concept borehole thermal resistance by Mogensen (1983), there have been numerous methods proposed for calculating this. In this chapter, we present methods for calculating local borehole thermal resistance and effective borehole thermal resistance which account for short-circuiting between the upward and downward-flowing legs of the ground heat exchanger. We also compare a wide range of simple, relatively easy-to-calculate methods to a detailed reference method and recommend suitable simplified methods.

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Energiteknik
  • Energisystem
  • Husbyggnad

Nyckelord

Originalspråkengelska
Titel på värdpublikationAdvances in Ground-Source Heat Pump Systems.
RedaktörerSimon Rees
FörlagWoodhead Publishing Limited
Sidor63-95
Utgåva1
ISBN (tryckt)978-0-08-100311-4
StatusPublished - 2016
PublikationskategoriForskning
Peer review utfördJa

Publikationsserier

NamnWoodhead Publishing Series in Energy
FörlagElsevier under the Woodhead Publishing imprint