scholarly journals Solar Panel Performance Improvement using Heatsink Fan as the Cooling Effect

2019 ◽  
Vol 1167 ◽  
pp. 012031
Author(s):  
Efsilon K A Fatoni ◽  
Ahmad Taqwa ◽  
Rd Kusumanto
Keyword(s):  
Performance Improvement ◽  
Solar Panel ◽  
Cooling Effect

The influence of solar panel roof on urban thermal environment and cooling energy demand during a heat wave event in 2017

2020 ◽  
Author(s):  
Yongwei Wang ◽  
Fei Chen ◽  
Xiaolong Hao ◽  
Fan Wang
Keyword(s):  
Heat Transfer ◽  
Power Generation ◽  
Energy Consumption ◽  
Air Temperature ◽  
Energy Supply ◽  
Energy Demand ◽  
Thermal Environment ◽  
Clean Energy ◽  
Solar Panel ◽  
Cooling Effect

<p>With the rapid development of social economy, China's energy demand has been growing at an alarming rate. The annual cumulative power generation is about  6.8 trillion kilowatts hour in 2017, and 70% of them is provided by fossil fuel resources, so it is important to promote the use of renewable and clean energy, such as solar power generation technology. The advantages of using solar panel roof in urban areas include reduction of the need of land use in the crowed city and less dependence on fossil fuels. However, there is need to understand impacts of solar roof on local climate, on energy supply during heatwaves, and associated economic benefits in China. This study selected a heatwave event in Jiangsu province, China to simulate the impact of solar panel roof on local thermal environment and energy supply. During that time, the cooling energy consumption reached more than half of the total electricity consumption. A new heat transfer scheme of solar panel roof was introduced into WRF/BEP/BEM model, which include layers (glass protective panel, solar panel, bottom plate) and was divided into two types for heat transfer calculation: bracket and non-bracket. The results showed that the urban average 2-m daytime temperature decreased by 0.3℃ in non-bracket case which is better than that of bracket case, while its cooling effect on nighttime temperature was small. For the bracket case, its cooling effect on daytime and nighttime air temperature were equal (0.2<sup>o</sup>C). Both solar panel roofs can reduce indoor daytime air temperature with the maximum cooling effect around 11:00 local time for non-bracket roof and 14:00 for bracket roof. However, bracket roof increased nighttime indoor air temperature and air-conditioning energy consumption. Solar panel roofs also reduce daytime turbulent kinetic energy and constrain the development of boundary layer. Results also show that with solar photoelectric conversion efficiency being 0.14, the photovoltaic power generation can meet 84.1%, 61.3% and 35.9% of the cooling energy consumption for high-density, low-density residential areas and commercial areas, respectively, during this heatwave event.</p>

Mitigating the warming in urban areas: Experimental study of different roof materials in a subtropical monsoon climate

2020 ◽  
Author(s):  
Xing Chen ◽  
Sujong Jeong
Keyword(s):  
Surface Temperature ◽  
Urban Areas ◽  
Field Experiments ◽  
Solar Panel ◽  
Urban Atmosphere ◽  
Cooling Effect ◽  
Monsoon Climate ◽  
Urban Heat ◽  
Cooling Effects ◽  
Subtropical Monsoon Climate

<p>Different roof materials are deployed for mitigating the urban heat, which significantly affects<br>our life. However, the performance of specific roof materials could be influenced by the<br>background climate. To evaluate the effectiveness of roof materials on temperature reductions in<br>a subtropical monsoon climate region, this study performs field experiments using four different<br>roof materials (gray and white surfaces, solar panel, and grass surface) from December 2017 to<br>July 2018. The results show that the white surface reduced the average daily surface temperature<br>by 3.37 °C. This cooling effect increased with the increase in surface albedo and incoming solar<br>radiation. However, the average cooling effect of the grass surface was much lower (0.43 °C).<br>This is attributable to the low soil moisture, which was influenced by the monsoon, thereby<br>indicating that irrigation is required to improve the thermal performance of grass roofs even in<br>humid regions. The solar panel reduced the daily surface temperature by 0.59 °C but exerted<br>strong warming (7.36 °C) during midday and cooling effects (4.03 °C) during midnight because<br>of its low albedo, low emissivity, and low heat capacity. Our results suggest that, for the roof<br>treatments explored here, white roofs are more effective for mitigating urban heat in a<br>subtropical monsoon climate under the present climatic conditions and especially for drier<br>climates predicted for the future, while grass roofs are not a sustainable method as they require<br>irrigation to achieve a cooling effect and solar panels may heat the urban atmosphere.</p>

scholarly journals Cooling effect and heat index (HI) assessment on car cabin cooler powered by solar panel in parked car

2021 ◽  
Vol 28 ◽  
pp. 101386
Author(s):  
Muji Setiyo ◽  
Budi Waluyo ◽  
Noto Widodo ◽  
Muhammad Latifur Rochman ◽  
Suroto Munahar ◽  
...  
Keyword(s):  
Solar Panel ◽  
Cooling Effect ◽  
Heat Index

Peningkatan kinerja guru dalam pembelajaran di kelas melalui supervisi edukatif Kolaboratif secara periodik MIS Lawe kongker Tahun pelajaran 2019/2020

2020 ◽  
Vol 1 (3) ◽  
pp. 316-324
Author(s):  
Syukrani Kadir
Keyword(s):  
Student Learning ◽  
Performance Improvement ◽  
Teacher Performance ◽  
Learning Cycle ◽  
Learning Achievement ◽  
Educational Supervision ◽  
Average Action ◽  
Learning Plans

periodically in preparing learning plans, implementing learning, assessing learning achievement, carrying out follow-up assessments of student learning achievement that can improve teacher performance. This performance improvement is through periodic collaborative educational supervision. Based on the results of educational supervision in cycle I and cycle II, teacher performance increased, namely in cycle I, teacher performance in preparing learning plans in cycle I reached 71.98%, while cycle II was 92.44%. Teacher performance in implementing learning cycle I reached 72.44% while cycle II reached 93.81%. Teacher performance in assessing learning achievement in cycle Im reached 81.30% while cycle II was 90.56%. Teacher performance in carrying out follow-up assessments of student learning achievement in the first cycle reached 59.76% while the second cycle was 83.00%. Thus, the average action cycle II was above 75.00%. Based on the results of this study, it can be concluded that the teacher's performance has increased in preparing learning plans, implementing learning, assessing learning achievement, carrying out follow-up assessments of student learning achievement.

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