[TRNSYS-users] New correlation for undisturbed ground temperature calculation

[Eslami Nejad, Parham]

Hello TRNSYS users,

This is regarding the development of a new correlation for calculating the undisturbed ground temperature. This correlation can be used in replacement of the annual average ambient temperature as a type or an equation in TRNSYS in conjunction with the ground heat exchanger and ground coupled heat pump types for more accurate simulations and modeling in this field.

A so-called "undisturbed ground temperature" is an important parameter for sizing of the ground heat exchanger (boreholes) connected to the ground source heat pump systems. Most of the time, engineers are using the annual average air ambient temperature instead of the undisturbed ground temperature for the design of the boreholes leading to significantly oversized borehole and therefore the additional initial cost of the project.
Based on measured data for seventeen sites covering a wide range of climates, a simple correlation of the undisturbed ground temperature has been developed as a function of the average air ambient temperature. For more details please check a scientific paper entitled "New correlations for the prediction of the undisturbed ground temperature" published in Geothermics Vol. 53 page 379-384

Should you need more information, please do not hesitate to contact our team:
Mohamed Ouzzane at mohamed.ouzzane at nrcan.gc.ca<mailto:mohamed.ouzzane at nrcan.gc.ca>
Parham Eslami Nejad at parham.eslaminejad at nrcan.gc.ca<mailto:parham.eslaminejad at nrcan.gc.ca>
Messaoud.Badache at messaoud.badache at nrcan.gc.ca<mailto:messaoud.badache at nrcan.gc.ca>

Kind Regards

Parham Eslami Nejad, Ph.D.
Chercheur post-doctorat | Post-doctoral researcher
CanmetÉNERGIE | CanmetENERGY
Ressources naturelles Canada| Natural Resources Canada
Varennes, Canada J3X 1S6
parham.eslaminejad at nrcan.gc.ca<mailto:parham.eslaminejad at nrcan.gc.ca>
Telephone: 1-450-652-4894
Gouvernement du Canada | Government of Canada

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