PVT collector technologies in solar thermal systems: A systematic assessment of electrical and thermal yields with the novel characteristic temperature approach

Lämmle, Manuel; Oliva, Axel; Hermann, Michael; Krämer, Korbinian; Kramer, Wolfgang

doi:10.1016/j.solener.2017.07.015

Cited by 72 publications

(26 citation statements)

References 27 publications

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“…The main idea behind this model, which is based on the work of Lämmle et al (2017), is to develop a PV performance model in TRNSYS, which can be coupled to existing models of solar thermal collectors or absorbers for the calculation of the electrical power output of WISC and covered PVT collectors (see Fig. 1).…”

Section: Overviewmentioning

confidence: 99%

“…In case of PVT collectors, the PVT cell temperature cell is calculated via an equivalent thermal network with an internal heat transfer coefficient cell−fl , which connects the PVT cell temperature with the mean fluid temperature m of the PVT collector (see Fig. 2), according to the electrical performance model of Lämmle et al (2017). In case of PV modules, the PV cell temperature is calculated by the Faiman model (Faiman, 2008) or from NOCT conditions.…”

Section: Fig 2 Thermal Networkmentioning

confidence: 99%

“…The mean fluid temperature is calculated as mean temperature between the thermal model input and output temperature (in this contribution Type 832). The PVT cell temperature is then given by (Lämmle et al, 2016(Lämmle et al, , 2017:…”

Section: Pvt Cell Temperaturementioning

confidence: 99%

“…Within the research project SolWP-Hybrid, different types of PVT collectors (WISC, covered, with and without backside thermal insulation) will be investigated by simulation and on a test bench for the application in solar thermal and heat pump systems. This contribution presents the implementation of a performance model for the electrical part of PVT collectors in TRNSYS (Type 835: PV model for the coupling with solar thermal absorber and collector models as PVT model), which is based on the work of Lämmle et al (2017), and first results of the model validation with experimental measurements including the parameter identification procedure. In addition, a comparison of the model results for the electrical part of crystalline modules of the implemented performance model with an adapted standard four-parameter (single diode) PV model in TRNSYS will be presented.…”

Section: Introductionmentioning

confidence: 99%

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Implementation and Experimental Validation of a Photovoltaic-Thermal (PVT) Collector Model in TRNSYS

Jonas¹,

Theis²,

Frey³

2018

Proceedings of EuroSun 2018

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Photovoltaic-thermal (PVT) collectors are hybrid solutions for solar collectors converting solar energy in electrical and thermal energy. To figure out best solutions and new possibilities for the application of PVT collectors, system simulations are often used as first step before proving in real applications. At this, the development of well-validated PVT collector models is an important task. This contribution presents the implementation of a performance model for the electrical part of PVT collectors in TRNSYS, which can be coupled to existing models of solar thermal collectors for the simulation of hybrid PVT collectors, and first results of the model validation with experimental measurements of three different PVT collectors. Furthermore, a parameter identification process with TRNSYS and GenOpt for a coupled PVT collector model is introduced and described in detail. In addition, a comparison of the electrical model with a four-parameter (single diode) PV model is presented to figure out if its implementation will improve the accuracy of the simulation results. The presented results pointed out that the PVT model in combination with the proposed parameter identification process achieves a good agreement of simulated and measured thermal and electrical power output for the analyzed PVT collector types and operating conditions.

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Section: Overviewmentioning

confidence: 99%

Section: Fig 2 Thermal Networkmentioning

confidence: 99%

Section: Pvt Cell Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Implementation and Experimental Validation of a Photovoltaic-Thermal (PVT) Collector Model in TRNSYS

Jonas¹,

Theis²,

Frey³

2018

Proceedings of EuroSun 2018

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“…PV modules generate clean electricity, reducing air pollution and having only little environmental impact. Now, typical efficiency of PV modules is in the range 15%÷20% [1]. The conversion of solar energy into electric power depends on the location, orientation, and type of photovoltaic (PV) system.…”

Section: Introductionmentioning

confidence: 99%

Tests and theoretical analysis of a pvt hybrid collector operating under various insolation conditions

et al. 2018

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The main goal of the study was to investigate the relationship between the orientation of the PVT (PhotoVoltaic Thermal) collector and the thermal and electric power generated. Extensive research was performed to find optimal tilt angles for hybrid solar thermal collectors, which combine photovoltaic as well as thermal collection in a single unit, known as PVT (PhotoVoltaic Thermal) modules for an office building with working hours between 7.00 and 16.00. The comprehensive study included field measurements of the modules in central Poland and tests under AM (air mass) 1.5 conditions in a certified laboratory KEZO (Centre for Energy Conversion and Renewable Resources) Polish Academy of Sciences in Jablonna. Furthermore, a PVT system was investigated using the simulation method based on the dedicated Polysun software. The PV characteristics and efficiency of the PV module and the relation between power or efficiency of the PVT module and incidence angle of solar-irradiance were studied. Optimal work conditions for commercial PVT modules were ascertained. In addition, it was found that the maximum efficiencies of PV module (ηPV), solar thermal-collector (ηc) and PVT hybrid collector (ηPVT) registered under field conditions were higher than the ones measured under laboratory conditions.

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Photovoltaic Thermal Technology Collectors, Systems, and Applications

Kramer,

Mehnert,

Munz

et al. 2023

Energy Tech

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Photovoltaic thermal (PVT) technology is drawing more and more attention in the context of the energy transition. Electrification of the heating sector by means of heat pumps run by carbon free electricity sources like photovoltaics is setting the ground for the interest. But data is scarce, how well compared to the existing heat pump system designs those with PVT perform. This article shows the real performance data of several PVT plus heat pumps systems. The identified seasonal performance factors (SPF) are in a range from 3,4 to 4,2 therefore between air source and ground source heat pumps. This article gives an insight into PVT technologies and collector designs and structures them according to application and operating temperatures. For the most conventional designs examples such as PVT collector prototypes from R&D projects at Fraunhofer ISE are presented and explained in detail. In addition, commercial products and manufacturers are listed along these categories, and the influence on the gross thermal and electrical yield is depicted based on Solar Keymark certified products and related data. The process of certification along thermal and electric normative procedures is presented in a comprehensive way showing current limitations and giving an outlook on most recent approach for enhanced procedures and specifications. Finally different system layouts are presented and examples from installations combined with a heat pump are given with their specific performances derived under continuous monitoring. The continuous monitoring and derived data are the enabler to discover the decisive influence of the system layout and dimensioning on performance indicators like e.g., operating temperatures of the PVT collectors over the year.This article is protected by copyright. All rights reserved.

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PVT collector technologies in solar thermal systems: A systematic assessment of electrical and thermal yields with the novel characteristic temperature approach

Cited by 72 publications

References 27 publications

Implementation and Experimental Validation of a Photovoltaic-Thermal (PVT) Collector Model in TRNSYS

Implementation and Experimental Validation of a Photovoltaic-Thermal (PVT) Collector Model in TRNSYS

Tests and theoretical analysis of a pvt hybrid collector operating under various insolation conditions

Photovoltaic Thermal Technology Collectors, Systems, and Applications

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