Current-dependent temperature change model of a thermoelectric window frame
Compared to conventional air-conditioning systems, Thermoelectric (TE) window systems exhibit a lower coefficient of performance (COP). To improve their COPs for practical use, it is essential to establish and validate a numerical model for optimizing the system in the pre-design phase. This work de...
| Authors: | , , |
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| Format: | article |
| Publication Date: | 2024 |
| Country: | España |
| Institution: | Universidad de Navarra |
| Repository: | Dadun. Depósito Académico Digital de la Universidad de Navarra |
| Language: | English |
| OAI Identifier: | oai:dadun.unav.edu:10171/70039 |
| Online Access: | https://hdl.handle.net/10171/70039 |
| Access Level: | Open access |
| Keyword: | Building Energy Numerical model Thermal performance Peltier |
| Summary: | Compared to conventional air-conditioning systems, Thermoelectric (TE) window systems exhibit a lower coefficient of performance (COP). To improve their COPs for practical use, it is essential to establish and validate a numerical model for optimizing the system in the pre-design phase. This work develops a thermoelectric window frame (TEWF) and validates its current-dependent temperature change model based on experimental results. The TEWF is integrated as an auxiliary window frame to address the limitations observed in existing TE window systems and its model enables simulations of the operation of the TEWF under various operating currents without the assumptions of the object-side temperature, the temperature difference between the two sides, or the desired supply air temperature. The results indicate that as the operating current increases, the hot-side temperature exhibits a more significant rise than the cold-side temperature, resulting in an increasing temperature difference between the hot and cold sides. Simultaneously, both thermal capacities at the hot and cold sides demonstrate a growing trend. However, the COP on both sides drops with the increasing current. Most variables in the simulation exhibit errors of less than 5% compared to the experimental results under identical conditions. Furthermore, their CV (RMSE) values all comply with the acceptable tolerances of 15% according to the ASHRAE 14 and FEMP standards. Therefore, the proposed current-dependent temperature change model of the TEWF demonstrates good accuracy and proves helpful in optimizing TE systems by simulating their thermal behavior under different operating conditions. |
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