The Effect of the Angle of Inclination on the Efficiency in a Medium-Temperature Flat Plate Solar Collector
In this experimental work, the effects of the inclination angle β and the (Ti − Ta)/G on the efficiency and the UL-value were investigated on a medium-temperature flat plate solar collector. The experiments were based on steady-state energy balance, by heat flow calorimetry at indoor conditions and...
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MDPI AG
2017-01-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/10/1/71 |
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| author | Orlando Montoya-Marquez José Jasson Flores-Prieto |
| author_facet | Orlando Montoya-Marquez José Jasson Flores-Prieto |
| author_sort | Orlando Montoya-Marquez |
| collection | DOAJ |
| description | In this experimental work, the effects of the inclination angle β and the (Ti − Ta)/G on the efficiency and the UL-value were investigated on a medium-temperature flat plate solar collector. The experiments were based on steady-state energy balance, by heat flow calorimetry at indoor conditions and considering the standard American National Standard Institute/American Society of Heating Refrigerating and Air Conditioning Engineers (ANSI/ASHRAE) 93-2010. The solar radiation was emulated by the Joule effect using a proportional integral derivative (PID) control considering two conditions of the absorber temperature, Case 1: (To − Ti) > 0, and Case 2: (To − Ti) = 0. The inclination angles were 0°–90° and the (Ti − Ta)/G were 0.044–0.083 m2·°C/W and 0.124–0.235 for Case 1 and Case 2, respectively. The variations of β and (Ti − Ta)/G cause efficiency changes up to 0.37–0.45 (21.6%) and 0.31–0.45 (45.0%), respectively, for Case 1. Also, the UL(β) reached changes up to 10.1–12.0 W/m2·°C (19.2%) and 8.4–12.0 W/m2·°C (41.7%), respectively, for Case 1. The most significant changes of UL(β)/UL(90°) vs. β were 8.0% at the horizontal position for Case 1, while for Case 2, the maximum change was 1.8% only. Therefore, the changes of the inclination angle cause significant variations of the convective flow patterns within the collector, which leads to considerable variation of the collector efficiency and its UL value. |
| first_indexed | 2024-04-12T19:55:15Z |
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| id | doaj.art-28c55199e6804885a23d897a1ffa6f92 |
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| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-12T19:55:15Z |
| publishDate | 2017-01-01 |
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| series | Energies |
| spelling | doaj.art-28c55199e6804885a23d897a1ffa6f922022-12-22T03:18:41ZengMDPI AGEnergies1996-10732017-01-011017110.3390/en10010071en10010071The Effect of the Angle of Inclination on the Efficiency in a Medium-Temperature Flat Plate Solar CollectorOrlando Montoya-Marquez0José Jasson Flores-Prieto1National Center of Research and Develop of Technology-TecNM-SEP, Interior Internado Palmira s/n, Cuernavaca 62490, Morelos, MexicoNational Center of Research and Develop of Technology-TecNM-SEP, Interior Internado Palmira s/n, Cuernavaca 62490, Morelos, MexicoIn this experimental work, the effects of the inclination angle β and the (Ti − Ta)/G on the efficiency and the UL-value were investigated on a medium-temperature flat plate solar collector. The experiments were based on steady-state energy balance, by heat flow calorimetry at indoor conditions and considering the standard American National Standard Institute/American Society of Heating Refrigerating and Air Conditioning Engineers (ANSI/ASHRAE) 93-2010. The solar radiation was emulated by the Joule effect using a proportional integral derivative (PID) control considering two conditions of the absorber temperature, Case 1: (To − Ti) > 0, and Case 2: (To − Ti) = 0. The inclination angles were 0°–90° and the (Ti − Ta)/G were 0.044–0.083 m2·°C/W and 0.124–0.235 for Case 1 and Case 2, respectively. The variations of β and (Ti − Ta)/G cause efficiency changes up to 0.37–0.45 (21.6%) and 0.31–0.45 (45.0%), respectively, for Case 1. Also, the UL(β) reached changes up to 10.1–12.0 W/m2·°C (19.2%) and 8.4–12.0 W/m2·°C (41.7%), respectively, for Case 1. The most significant changes of UL(β)/UL(90°) vs. β were 8.0% at the horizontal position for Case 1, while for Case 2, the maximum change was 1.8% only. Therefore, the changes of the inclination angle cause significant variations of the convective flow patterns within the collector, which leads to considerable variation of the collector efficiency and its UL value.http://www.mdpi.com/1996-1073/10/1/71covered solar collectorstilt solar collectorinclined solar collectoroverall heat loss coefficient |
| spellingShingle | Orlando Montoya-Marquez José Jasson Flores-Prieto The Effect of the Angle of Inclination on the Efficiency in a Medium-Temperature Flat Plate Solar Collector Energies covered solar collectors tilt solar collector inclined solar collector overall heat loss coefficient |
| title | The Effect of the Angle of Inclination on the Efficiency in a Medium-Temperature Flat Plate Solar Collector |
| title_full | The Effect of the Angle of Inclination on the Efficiency in a Medium-Temperature Flat Plate Solar Collector |
| title_fullStr | The Effect of the Angle of Inclination on the Efficiency in a Medium-Temperature Flat Plate Solar Collector |
| title_full_unstemmed | The Effect of the Angle of Inclination on the Efficiency in a Medium-Temperature Flat Plate Solar Collector |
| title_short | The Effect of the Angle of Inclination on the Efficiency in a Medium-Temperature Flat Plate Solar Collector |
| title_sort | effect of the angle of inclination on the efficiency in a medium temperature flat plate solar collector |
| topic | covered solar collectors tilt solar collector inclined solar collector overall heat loss coefficient |
| url | http://www.mdpi.com/1996-1073/10/1/71 |
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