Notice bibliographique
Résumé
Ground source heat pump (GSHP) systems are an increasingly attractive option for reducing building energy use and emissions. These systems rely on ground heat exchangers (GHEs) that act as both heat sinks and heat sources, and accurate GHE modeling is necessary for reliable design. Determining the size of the GHE required to meet design requirements is a critical aspect of GSHP system design. The purpose of this study is to advance GHE design methods through the development, refinement, and validation of new modeling capabilities within GLHEPro Version 5.1, together with improvements to g-function generation and handling. GLHEPro has long been used for vertical closed-loop GHEs, but emerging applications such as standing column wells (SCWs) and non-conventional borehole systems, along with increased usage of deep borehole GHEs, necessitated further development of the design tool. A central contribution is an improved, computationally efficient model for SCWs. The groundwater-filled borehole is represented by a single control volume surrounded by a one-dimensional radial finite volume grid that captures both conduction and pumping-driven advection, while buoyancy effects are represented through an enhanced effective thermal conductivity. A user-specified large fracture flow fraction (LFFF) parameter allows part of the flow that enters back into the borehole to be through large fractures, bypassing the surrounding rock. The model is validated against a 35-day summer multi-flow-rate thermal response test and a 25-day winter operation test from a field installation in Varennes, Canada, yielding mean absolute errors in SCW outlet temperature of 0.32 °C and 0.68 °C, respectively, with more than 70% of the hours falling within experimental uncertainty. Several advancements in g-function handling were implemented. Short-time-step (STS) g-functions were reformulated to utilize effective pipe and grout resistance when the user chooses to consider thermal short-circuiting, removing discontinuity between STS and long-time-step (LTS) g-functions. Interpolation strategies were introduced for both single and multiple boreholes to improve accuracy across a wider range of borehole geometries. A user-specified borehole resistance option was added so users can anchor their borehole behavior to their estimated or manufacturer specified resistance values, while retaining the internal transient solution structure. This enabled modeling of custom non-conventional boreholes in GLHEPro. Additional enhancements include a more robust iterative solver enabling sizing of deep boreholes, and support for ground loads in both hybrid sizing and hourly simulations. Validation against four field installations showed borehole sizing results within 17% for cases with adequate flow rate, which is reasonable when considering the accuracy limits of the hybrid time-step method and other underlying conservative assumptions.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,001 |
| Méta-épidémiologie (sens large) | 0,001 | 0,001 |
| Bibliométrie | 0,002 | 0,004 |
| Études des sciences et des technologies | 0,001 | 0,001 |
| Communication savante | 0,000 | 0,002 |
| Science ouverte | 0,002 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».