Effect of high irradiation and cooling on power, energy and performance of a PVT system

Nasrin, Rehena; Hasanuzzaman, M.; Rahim, N.A.

doi:10.1016/j.renene.2017.10.004

Cited by 94 publications

(42 citation statements)

References 37 publications

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“…The vertical lines indicate the agreement between the RegCM4 members while the horizontal lines show the statistically significant change (at 90% confidence level). All the models agree on the signal and statistical significance of TAS changes over Africa the association between Rs and PVP previously reported by Nasrin et al (2018). The simulations with their Rmean and the observational datasets also agree on the high WPD in the same latitudinal band (like PVP and CSPOUT).…”

Section: Model Evaluationsupporting

confidence: 85%

Current and future potential of solar and wind energy over Africa using the RegCM4 CORDEX-CORE ensemble

et al. 2020

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Renewable energy is key for the development of African countries, and knowing the best location for the implementation of solar and wind energy projects is important within this context. The purpose of this study is to assess the impact of climate change on solar and wind energy potential over Africa under low end (RCP2.6) and high end (RCP8.5) emission scenarios using a set of new high resolution (25 km) simulations with the Regional Climate Model version 4 (RegCM4) produced as part of the CORDEX-CORE initiative. The projections focus on two periods: (i) the near future (2021-2040) and ii) the mid-century future (2041)(2042)(2043)(2044)(2045)(2046)(2047)(2048)(2049)(2050)(2051)(2052)(2053)(2054)(2055)(2056)(2057)(2058)(2059)(2060). The performance of the RegCM4 ensemble mean (Rmean) in simulating relevant present climate variables (1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014) is first evaluated with respect to the ERA5 reanalysis and satellite-based data. The Rmean reproduces reasonably well the observed spatial patterns of solar irradiance, air temperature, total cloud cover, wind speed at 100 m above the ground level, photovoltaic power potential (PVP), concentrated solar power output (CSPOUT) and wind power density (WPD) over Africa, though some biases are still evident, especially for cloud-related variables. For the future climate, the sign of the changes is consistent in both scenarios but with more intense magnitude in the middle of the century RCP8.5 scenario. Considering the energy variables, the Rmean projects a general decrease in PVP, which is more pronounced in the mid-century future and under RCP8.5 (up to 2%). Similarly, a general increase in CSPOUT (up to 2%) is projected over the continent under both the RCP2.6 and RCP8.5 scenarios. The projection in WPD shows a similar change (predominant increase) in the near and mid-century future slices under both RCPs with a maximum increase of 20%. The present study suggests that the RCP2.6 emission scenario, in general, favours the implementation of renewable energy in Africa compared to the RCP8.5.

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Section: Model Evaluationsupporting

confidence: 85%

Current and future potential of solar and wind energy over Africa using the RegCM4 CORDEX-CORE ensemble

et al. 2020

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“…A systematisation demonstrates that cooling systems are divided in two groups: (i) Open system, when the fluid comes in direct contact with the top surface of PV module [25,26,32,44,75], with bottom surface of PV module or both surfaces [45]; and (ii) closed system, when the fluid is confined and makes the thermal exchange through the equipment installed on the bottom surface of the PV module [49,[76][77][78][79], see Tables 3 and 4. Hence, the ODTU system of this work can be characterised as Open system and top side surface.…”

Section: Results Consolidationmentioning

confidence: 99%

Theoretical and experimental research to development of water‐film cooling system for commercial photovoltaic modules

Silva

Martinez-Bolanos

Heideier

et al. 2021

IET Renewable Power Gen

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This work aims at developing and validating mathematical models and empirically evaluating a water-film cooling system for commercial photovoltaic modules. Methodologically, thermal, electrical and climatological data measured in a specific purpose on-grid outdoor test unit were used. In this work they are used to study the improvement in the performance of photovoltaic energy production due to temperature reduction. The first-order state-space linear parametric model presents the best performance to predict the temperature of the uncooled photovoltaic modules, with normalised mean square error (NRMSE) of 86.75%. In contrast, the non-linear model performance of cooled photovoltaic modules is lower, with NRMSE of 44.5%; however, the results show that the performance of the complete thermoelectric model is satisfactory, with NRMSE of 76.38%. On the other hand, empirical tests showed that the cooling system reduces temperature in 15-19%, on average, and to a maximum of 35%. In terms of power, there are average gains of 5-9%, and maximum gains of 12%. Regarding gross generation, there are average gains of 2.3-6%, and maximum gains of 12%. It was concluded that it is possible to mathematically model and predict this generation using non-linear models with a 0.2% error between modelled and measured generation. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…When a gas is used, air is often utilized as the fluid in either an open or closed loop system. Testing of both types of hybrid panels has shown that electrical performance improvements of up to 7% can be achieved compared to conventional photovoltaic (PV) panels [74]. This increase in electrical performance is due to lower PV cell temperatures caused by heat removal, which is another benefit of using hybrid panels [75].…”

Section: Overview Of Hybrid Solar Panelsmentioning

confidence: 99%

Development of a hybrid solar cascade heat pump heating system

Fine¹

2021

Preprint

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Society’s use of fossil fuels has led to increasingly high levels of CO2 in the atmosphere. These levels have been linked to global average temperature rises, and increases in the severity and frequency of major weather events. To combat these effects, nations around the world have committed to reducing their CO2 emissions, and transition to renewable energy. This thesis focuses on the development of a novel solar heating system, which combines a hybrid solar panel and cascade heat pump. The thesis begins by presenting a high-level literature review of solar and heat pump technologies, followed by the initial design development of the system. Two design iterations are presented, illustrating that the final design was selected because it exhibits improved peak heat output, and reduced sensitivity to panel temperature. Next, a manuscript-based chapter is presented that focuses on utilizing the proposed solar heating system for water distillation. Case studies are presented that compare the performance of the proposed system with a solar still at four different locations. The final conclusion from these studies is that using the proposed system offers area-based performance improvements of 780% compared to a basic solar still. A second manuscript-based study is then presented, which focuses on utilizing the proposed solar heating system for domestic hot water production. Additional case studies are detailed that compare the proposed system to an evacuated tube design, and a single heat pump. The conclusions from these studies are that the proposed system exceeds the performance of the evacuated tube system by up to 64%, and that the proposed system is most beneficial during seasons with higher average dry-bulb temperatures, and increased solar irradiation. A final manuscript-based study is then presented, which focuses on a methodology for improving alternate mode thermal performance estimates for hybrid solar panels. The conclusion from this study is that the proposed methodology can successfully estimate thermal performance within 5% of actual values. Each of these studies contributes to the project goal of developing a novel solar energy heating system, which can be further developed to reduce global CO2 emissions, and reduce the effects of climate change.

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Effect of high irradiation and cooling on power, energy and performance of a PVT system

Cited by 94 publications

References 37 publications

Current and future potential of solar and wind energy over Africa using the RegCM4 CORDEX-CORE ensemble

Current and future potential of solar and wind energy over Africa using the RegCM4 CORDEX-CORE ensemble

Theoretical and experimental research to development of water‐film cooling system for commercial photovoltaic modules

Development of a hybrid solar cascade heat pump heating system

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