Energy optimization of a geothermal heat-pump system through dynamic system simulation
Notice bibliographique
Résumé
The sustainable principle of the “three-pillar-model” containing ecologic, economic and social targets, pursues three strategies to realize sustainability in the long term. Those strategies are made up of the principle of efficiency, consistency and sufficiency. A great number of the burgeoning sustainability movements focus on promising potential in the consistency and sufficiency strategies. In general, the potential of efficiency in industrialized countries, like Germany, is classified as well-developed while the phenomenon of a performance gap is rising. The performance gap describes the discrepancy between the intended, desired building performance and the actual, observed performance. [1] The building sector in Germany, responsible for 40 % of total end energy use, holds a great potential for energy savings [2]. At the level of the building services of an edifice the code DIN 18599 indicates the thermal energy demand. [3] Studying the extension of the International Airport in Calgary, this master thesis investigates the effects of an energy optimization of the airport’s geothermal heat-pump system. Its subsystems are divided into two categories. The first category is defined by fixed parameters that must be set at the beginning of the design process of a building system, as they cannot be changed throughout the life of the building. Conversely, the adjustable category is determined by components of the building system that can be adjusted by the control strategy of the subsystem or even through a replacement of single components on a reasonable effort basis. The two categories will be investigated by changing individual characteristic values of the components in the subsystem for each optimization variant. Through the evaluation of the two classifications, the influence of the categories on the aspect of energy efficiency and the service life of a geothermal heat-pump system are going to be clarified. Furthermore, this master thesis endeavors to emphasize which of the two categories of optimization variants has a bigger energy savings and longevity potential. This energy analysis is performed through a dynamic system simulation with the software TNRSYS. The parametric values of the geothermal field are the undisturbed ground temperature, the architecture of the geothermal borehole pipes, the thermal conductivity of the ground, the medium in the geothermal loop and the balance of the building load of the system. The category for variable components includes the control strategy of the hydraulic separators, the power of the heat-pump/chiller component, the mass flow in the loops, as well as the heat transfer effectiveness of the plate heat exchangers. The variants are evaluated according to the non-renewable primary energy demand and the number of system changes of the building services. The category of the fixed parameters of the geothermal field mainly influences the demand of non-renewable primary energy, especially depending on the implemented borehole pipes and the thermal ground conductivity. The adjustable components of the building system influence both factors, above all depending on the performance of the heat-pump and the hydraulic separators. All in all, the adjustable components have a wider array of effects on the system.
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) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 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 ».