Electrical and thermal performance comparison between PVT-ST and PV-ST systems

Han, Zhonghe; Liu, Kaixin; Li, Guiqiang; Zhao, Xudong; Shittu, Samson

doi:10.1016/j.energy.2021.121589

Cited by 41 publications

(10 citation statements)

References 28 publications

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“…In a study by Tomson et al, it is reported that the energy output of ETCs is more than FPCs in the context of Tallinn when using simulation methods [46]. According to a heat transfer model presented and studied by Han et al [47], PVs and PVTs for solar thermal behave differently under different ambient temperatures, inlet water temperatures, and solar irradiance. Both the electric and thermal efficiency of PV are higher than those of a PVT solar thermal system when the ambient temperature and solar radiation are low.…”

Section: Major Componentsmentioning

confidence: 99%

Design and Development of a Conceptual Solar Energy Laboratory for District Heating Applications

Chung,

Sukumaran,

Hlebnikov

et al. 2023

Solar

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The decarbonization of the district heating (DH) sector is receiving attention worldwide. Solar energy and heat pump technologies are widely considered in existing and new DH networks. There is a need to understand the influence of solar energy on district heating experimentally. However, only a few university laboratories are focused on district heating aspects. Further, the concept of such laboratories is not adequately disseminated in the scientific literature. The main objective of this paper is to develop a conceptual design of a solar energy laboratory with a focus on district heating systems. The proposed concept forms part of the preliminary study carried out by a research group at the Tallinn University of Technology. First, a brief literature review on solar energy laboratory development is provided. Then, the conceptual design of such a laboratory is presented, along with a case study. Regardless of project size, the main components of a district heating-based solar energy laboratory are solar collectors, thermal energy storage (TES) tanks, and a control system. The proposed laboratory is expected to serve multiple roles, such as a practical laboratory to provide interdisciplinary courses for students, a research and experimental platform for researchers, and a cradle to achieve the campus green initiative. It is roughly estimated that the thermal energy output from the proposed laboratory would meet around 25% of the heat demand of the institutional building during the summer season (May, June, July, and August). It is expected that the present study will be a reference material for the development of innovative energy laboratories in educational institutions.

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Section: Major Componentsmentioning

confidence: 99%

Design and Development of a Conceptual Solar Energy Laboratory for District Heating Applications

Chung,

Sukumaran,

Hlebnikov

et al. 2023

Solar

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“…Han et al [13] numerically compared the performance of two different systems, (1) a photovoltaic panel and ST collector that worked separately (the first system only produces electricity and the next one provides thermal power); and (2) a hybrid PVT/ST system. They conducted their simulations under a fixed heat flux and ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Yearly Energy, Exergy, and Environmental (3E) Analyses of A Photovoltaic Thermal Module and Solar Thermal Collector in Series

AL-aridhee

Moghiman

2023

alkej

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The annual performance of a hybrid system of a flat plate photovoltaic thermal system and a solar thermal collector (PVT/ST) is numerically analyzed from the energy, exergy, and environmental (CO2 reduction) viewpoints. This system can produce electricity and thermal power simultaneously, with higher thermal power and exergy compared to conventional photovoltaic thermal systems. For this purpose, a 3D transient numerical model is developed for investigating the system's performance in four main steps: (1) investigating the effects of the mass flow rate of the working fluid (20 to 50 kg/h) on the temperature behavior and thermodynamic performance of the system, (2) studying the impacts of using glass covers on the different parts of the system, (3) evaluating the annual energy and exergy analyses of the system under Mashhad weather conditions, and (4) examining the CO2 reduction by using the proposed system. The results show that for the (glazed) PVT and (glazed) ST systems, increasing the mass flow rate of the working fluid from 20 to 50 kg/h results in 22% and 1.5% improvements in both thermal and electrical power, respectively. However, the thermal exergy of the system decreases by 40.1%. Furthermore, the (glazed) PVT/(glazed) ST systems generate approximately 86% and 264% more thermal power and energy than the PVT/ST systems, respectively. Using a (glazed) PVT/(glazed) ST system with a working fluid’s mass flow rate of 50 kg/h results in maximum thermal and electrical efficiencies of 40.7% and 16.22%, respectively. According to the annual analysis, the highest average thermal and electrical power, equal to approximately 338.3 and 24 W, respectively, is produced in August. The amount of CO2 reduction increases by increasing the mass flow rate and using a glass cover. The PVT/(glazed)ST system has the potential to reduce CO2 emissions by 426.3 kg per year.

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“…The PV panel in the PVT module is cooled by the movement of water, which not only lowers PV temperature and boosts electrical efficiency but also generates hot water. In the same space, the PVT module may generate more electricity than a single PV module [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Performance Evaluation on PV-module

Muharam,

Jalil,

Nor

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Photovoltaic (PV) modules are among the most efficient, environmentally benign, and long-lasting systems. The amount of solar radiation impacting these modules that is converted to electricity is quite little. The remaining radiation is transformed into heat, which causes the PV module to overheat and lose efficiency. This experiment examines the effects of changing several operating parameters on the performance of PV modules, including irradiation intensity, and cooling fluid mass flow rate. To reduce cell temperature, a heat exchanger was placed on the PV module’s back surface. For PV modules, findings indicate that as solar cell temperature rises by 1.2°C, the module’s electrical efficiency falls by 5.64%. Meanwhile for PVT, as the temperature of module rises by 1.2°C, the electrical efficiency similarly drops by roughly 0.22%. The solar cell temperature rises by 0.7°C and the output power rise by 2.26W, yet the efficiency falls by 0.25%. In conclusion, the performance of PV modules is greatly influenced by temperature of the solar cell, intensity of solar radiation, and mass flow rate of cooling fluids.

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Electrical and thermal performance comparison between PVT-ST and PV-ST systems

Cited by 41 publications

References 28 publications

Design and Development of a Conceptual Solar Energy Laboratory for District Heating Applications

Design and Development of a Conceptual Solar Energy Laboratory for District Heating Applications

Yearly Energy, Exergy, and Environmental (3E) Analyses of A Photovoltaic Thermal Module and Solar Thermal Collector in Series

Experimental Performance Evaluation on PV-module

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