Exergetic and Energetic Performance Evaluation of a Flat Plate Solar Collector in Dynamic Behavior
| Autor: | Mouna Ben Hamed, Ammar Ben Brahim, Ali Fellah |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Exergy
Engineering Work (thermodynamics) business.industry 020209 energy Mechanical engineering 02 engineering and technology Mechanics Laws of thermodynamics 020401 chemical engineering Thermal 0202 electrical engineering electronic engineering information engineering Exergy efficiency Emissivity Mass flow rate Transient (oscillation) 0204 chemical engineering business |
| DOI: | 10.1016/b978-0-12-813734-5.00023-8 |
| Popis: | This work aimed to evaluate the energy and the exergy performance of a flat plate solar collector under transient conditions. A theoretical model based on the first and second laws of thermodynamics was developed to predict the thermal behavior of the system. An exergy analysis was performed to determine the location, type, and magnitude of exergy destroyed and losses over the collector. The mathematical model obtained was solved numerically using the MATLAB computational program and Stat Ease Expert Design software. A detailed parametric study was conducted to assess the effect of various parameters. The results showed that the values for exergy efficiency were low compared with energetic ones. Furthermore, the main cause of exergy destruction was the absorption of radiation by the absorber plate. The mass flow rate, inlet water temperature, and absorber emissivity are critical parameters for a solar collector. However, the number of tubes and the diameter of the pipes have negligible effects on the collector’s performance. Thus, more accurate results and useful applications of the exergy method in transient behaviors were obtained to design solar collectors. |
| Databáze: | OpenAIRE |
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