The effects of a secondary heat source on the performance ofthermophotovoltaic systems
Notice bibliographique
Résumé
Abstract: Thermophotovoltaics (TPV) is a versatile thermal-to-power conversion technology with many applications including uninterruptable power supplies, combined heat and power systems, self-powered heating devices, and industrial waste heat recovery. Recently, the efficiency of TPV systems has surpassed 30% and is expected to increase towards 50%. As their efficiency increases, the applications of TPV systems continue to expand due to their inherent advantages: they can be made to be lightweight, with no moving components, and with exceptionally high-power densities. To further increase their utility and reliability, TPV systems can be powered using multiple sources of heat. For example, solar-powered TPV systems are a promising source of remote or transportable power in sunny regions. However, solar irradiance is variable and intermittent. By using a secondary heat source, such as a fuel, solar-powered TPV systems can operate without interruption. Furthermore, the efficiency of TPV systems increases rapidly as their operating temperature increases, and when TPV systems are powered using heat from the sun and fuels simultaneously, their power output can exceed the sum of the power that would be generated when using these sources individually. In principle, hydrocarbon fuels, concentrated solar irradiance, industrial waste heat, and biomass/gas can be used to power TPV systems at the same time. Despite the impressive performance improvements that can be achieved by using multiple sources to power TPV systems simultaneously, very little research has been done on “multisource” TPV systems. Herein, numerical calculations are performed to determine the efficiency and power output from a TPV system that is powered by a primary source (that provides 20, 40, 60, 80, or 100 W of heat per cm2 of emitter area) and a secondary source that provides thermal energy ranging from 0 to 100 W/cm2. Results show that the addition of a second source can have an immense effect on the output power and efficiency of TPV systems. For example, when a small amount of energy is added as a secondary source, 5 W/cm2 for instance, to a TPV system powered using a primary heat source of 5 W/cm2, the output power increases by a factor of about four. Also, for TPV systems operating with a greater heat input of 100 W/cm2, the output power can be doubled by adding a secondary power source that provides heat at a rate of 80 W/cm2. The results presented in this work bode well for the advancement of multisource TPV systems.
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.
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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) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 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 ».