Calculation of Borehole Thermal Resistance
Kapitel i bok, 2016

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.

effective resistance

borehole thermal resistance

multipole

grout resistance

local resistance

comparison

calculation

resistance network

Författare

Saqib Javed

Chalmers, Bygg- och miljöteknik, Installationsteknik

Jeff Spitler

Oklahoma State University - Stillwater

Advances in Ground-Source Heat Pump Systems

63-95

Ämneskategorier

Maskinteknik

Energiteknik

Naturresursteknik

Energisystem

Husbyggnad

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures

Energi

DOI

10.1016/B978-0-08-100311-4.00003-0

ISBN

978-0-08-100322-0

Mer information

Skapat

2017-10-08