Design and Evaluation of a Photovoltaic/Thermal-Assisted Heat Pump Water Heating System

Tsai, Huan‐Liang

doi:10.3390/en7053319

Cited by 41 publications

(12 citation statements)

References 15 publications

(17 reference statements)

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“…This work focuses primarily on physical relationships and the physical description of the energetic processes. The thermal processes of PV modules have been subject to a number of analyses [28][29][30][31][32][33]. However, all algorithms differ one from another, regardless of the installation structure and produce different end results.…”

Section: Thermal Dynamics For Photovoltaic Modulesmentioning

confidence: 99%

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Comparison of Thermal Models for Ground-Mounted South-Facing Photovoltaic Technologies: A Practical Case Study

et al. 2018

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This paper examines the thermal properties of free-standing, ground-installed, south-facing crystalline and amorphous silicon photovoltaic modules, the remaining energy and the energy generation of the modules, in ideal and actual summer weather conditions. This work studies the algorithms in other studies used to describe the thermal processes occurring on the surface of photovoltaic modules. Using accurate devices and real, measured data, the deviations and the inaccuracies of theoretical approaches are investigated. The emphasis of the present study is to improve the simulation accuracy of the total emitted long-wave radiation at the module surface and to show the appropriate overall convection coefficient values for ground-mounted south-facing photovoltaic technologies. The innovative aspect of the present paper is an improved model resulting from an improved convective heat transfer and net long-wave radiation calculation. As a result of this research, algorithms describing the energy fluxes were developed. These algorithms have a 1-3% better accuracy of the net long-wave radiation calculations at the module surface. The rate of net energy exchange by convection at the module surface could be improved by 10-12% compared to the previous literature.

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Section: Thermal Dynamics For Photovoltaic Modulesmentioning

confidence: 99%

“…The heat balance of the solar module is given by Jones and Underwood, Tsai and Tsai, and Tsai [28,30,31]:…”

Section: Thermal Dynamics For Photovoltaic Modulesmentioning

confidence: 99%

Comparison of Thermal Models for Ground-Mounted South-Facing Photovoltaic Technologies: A Practical Case Study

et al. 2018

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“…28d. The last design is more attractive due to lower PV cell temperatures during operation however, complexity of the system makes the module difficult to manufacture (Hasan and Sumathy, 2010;van Helden et al, 2004). Tripanagnostopoulos et al (2001a) test a HPV/T system that can allow water or air circulate as working fluids during operation.…”

Section: Alternative Schemes Of Hpv/t Collectorsmentioning

confidence: 99%

Hybrid Photovoltaic/Thermal (HPV/T) Systems: From Theory to Applications

Cüce¹,

Oztekin²,

Cuce³

2018

Energy Research Journal

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Hybrid photovoltaic/ thermal systems are very promising clean energy harvesting devices where they can be used either standalone system or can be incorporated with other systems. In this study, historical developments leading to current Hybrid Photovoltaic/Thermal (HPV/T) systems as it is used today and global findings to enhance the performance of HPV/T system through state-of-the-art analyses are presented in a thematic way. The findings from initial studies on the HPV/T systems is revealed in an historical way and rest of sections are formed based on selected criteria. The paper covers basic and advanced type collectors, working fluids, analyzing methods to assess performance, thermodynamic approaches, optimization of design parameters and mass flow rates, techniques to enhance performance and comparative studies. Especially, various parametric studies to optimize performance of the HPV/T with respect to selected parameters including different types of absorbers, packing factor, cooling schemes, working fluid types, modifications at different sections of the system are comprehensively investigated. Based on the conclusions, the variation in electrical and thermal efficiencies are mainly in the scope of this study. It is observed from the literature that solar HPV/T system has a great potential to be one of the up and coming clean energy technology.

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“…The methods used widely are the top vapor recompression, closed cycle heat pump and bottom flashing heat pump. Many studies have been developed to improve the heat pump technology for different applications [37][38][39]. The heat pump can be used both in grassroots or retrofitting designs because they are easy to introduce and plant operation is normally simpler than other heat integration cases [40].…”

Section: Enhanced Configuration By Heat-pump Assisted Self-heat Integmentioning

confidence: 99%

Design of an Extractive Distillation Column for the Environmentally Benign Separation of Zirconium and Hafnium Tetrachloride for Nuclear Power Reactor Applications

et al. 2015

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Nuclear power with strengthened safety regulations continues to be used as an important resource in the world for managing atmospheric greenhouse gases and associated climate change. This study examined the environmentally benign separation of zirconium tetrachloride (ZrCl4) and hafnium tetrachloride (HfCl4) for nuclear power reactor applications through extractive distillation using a NaCl-KCl molten salt mixture. The vapor-liquid equilibrium behavior of ZrCl4 and HfCl4 over the molten salt system was correlated with Raoult's law. The molten salt-based extractive distillation column was designed optimally using a rigorous commercial simulator for the feasible separation of ZrCl4 and HfCl4. The molten salt-based extractive distillation approach has many potential advantages for the commercial separation of ZrCl4 and HfCl4 compared to the conventional distillation because of its milder temperatures and pressure conditions, smaller number of required separation trays in the column, and lower energy requirement for separation, while still taking the advantage of environmentally benign feature by distillation. A heat-pump-assisted configuration was also explored to improve the energy efficiency of the extractive distillation process. The proposed enhanced configuration reduced the energy requirement drastically. Extractive distillation can be a promising option competing OPEN ACCESSEnergies 2015, 8 10355 with the existing extraction-based separation process for zirconium purification for nuclear power reactor applications.

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Design and Evaluation of a Photovoltaic/Thermal-Assisted Heat Pump Water Heating System

Cited by 41 publications

References 15 publications

Comparison of Thermal Models for Ground-Mounted South-Facing Photovoltaic Technologies: A Practical Case Study

Comparison of Thermal Models for Ground-Mounted South-Facing Photovoltaic Technologies: A Practical Case Study

Hybrid Photovoltaic/Thermal (HPV/T) Systems: From Theory to Applications

Design of an Extractive Distillation Column for the Environmentally Benign Separation of Zirconium and Hafnium Tetrachloride for Nuclear Power Reactor Applications

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