Investigation of the thermal performance of a solar absorber and nocturnal radiator (SAANR) hybrid panel for summer and winter seasons
| Autor: | Kago R. Rabasoma, K. N. Nwaigwe |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Radiative cooling Correlation coefficient Nocturnal Atmospheric sciences law.invention 03 medical and health sciences 0302 clinical medicine law Thermal Performance prediction lcsh:Social sciences (General) lcsh:Science (General) Nocturnal cooling Multidisciplinary Transient Thermal performance Temperature Hybrid 030104 developmental biology Environmental science lcsh:H1-99 Diurnal heating Transient (oscillation) Radiator 030217 neurology & neurosurgery Solar absorber lcsh:Q1-390 Research Article |
| Zdroj: | Heliyon Heliyon, Vol 6, Iss 12, Pp e05764-(2020) |
| ISSN: | 2405-8440 |
| Popis: | Transient analysis and performance prediction of a solar absorber and nocturnal radiator (SAANR) hybrid panel for water heating and cooling in the summer and winter seasons of Gaborone, Botswana is presented. Transient heat transfer models were developed for the panel and the models were then transformed into explicit finite difference forms for numerical analysis using MATLAB. The SAANR panel added up to 7 kWh diurnal heating energy in winter and removed up to 0.5 kWh at night through radiation cooling in summer. The resulting numerical solutions of the model were validated by comparison with experimental results and they showed excellent strength of association with a correlation coefficient of 0.832 and fairly acceptable goodness of fit at an R-squared value of 69%. Sensitivity analysis carried out showed the model to react linearly to panel area changes. From the results, it is concluded that the hybrid panel is robust enough to perform in both the summer and winter seasons of Gaborone, and areas with similar climatic conditions. This implies that the system can be used simultaneously for space cooling and domestic water heating in both summer and winter. This technology can therefore be used instead of electric water heaters and air-conditioners and thus save energy. Nocturnal cooling; Diurnal heating; Hybrid; Transient; Thermal performance; Temperature |
| Databáze: | OpenAIRE |
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