Performance evaluation of low concentrating photovoltaic/thermal systems: A case study from Sweden

Bernardo, Ricardo; Perers, Bengt; Håkansson, Håkan; Karlsson, Björn

doi:10.1016/j.solener.2011.04.006

Cited by 110 publications

(56 citation statements)

References 10 publications

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“…The idea of CPVT considered in this study is based on the work of Bernardo et al [24,28] and on a prototype that has been recently commercialized [10,24,28]. The CPVT (Figure 1) consists of a parabolic trough concentrator and a one-axis tracking system that uses the same operating principle of solar thermal Parabolic Trough Collectors (PTC) [29][30][31].…”

Section: Cpvt Simulation Modelmentioning

confidence: 99%

“…Authors also pointed out that the cost of unit area of the GeAs is 3067. 16 [24]. This study presents a thermal model of the PVT subsequently validated by experimental data.…”

Section: Introductionmentioning

confidence: 99%

“…This paper is focused on the Concentrating Parabolic Trough PVT solar collector technology of and it presents a design procedure and a simulation model of a novel concentrating PVT collector. The layout of the PVT system under investigation was derived from a prototype recently presented in literature and commercially available [24]. The design of this prototype was modified with the scope to improve its electrical performance and it consists in a parabolic trough concentrator and a linear triangular receiver.…”

Section: Introductionmentioning

confidence: 99%

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Parabolic Trough Photovoltaic/Thermal Collectors: Design and Simulation Model

Calise

Vanoli

2012

Energies

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This paper presents a design procedure and a simulation model of a novel concentrating PVT collector. The layout of the PVT system under investigation was derived from a prototype recently presented in literature and commercially available. The prototype consisted in a parabolic trough concentrator and a linear triangular receiver. In that prototype, the bottom surfaces of the receiver are equipped with mono-crystalline silicon cells whereas the top surface is covered by an absorbing surface. The aperture area of the parabola was covered by a glass in order to improve the thermal efficiency of the system. In the modified version of the collector considered in this paper, two changes are implemented: the cover glass was eliminated and the mono-crystalline silicon cells were replaced by triple-junction cells. In order to analyze PVT performance, a detailed mathematical model was implemented. This model is based on zero-dimensional energy balances. The simulation model calculates the temperatures of the main components of the system and the main energy flows Results showed that the performance of the system is excellent even when the fluid temperature is very high (>100 °C). Conversely, both electrical and thermal efficiencies dramatically decrease when the incident beam radiation decreases.

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Section: Cpvt Simulation Modelmentioning

confidence: 99%

“…Authors also pointed out that the cost of unit area of the GeAs is 3067. 16 [24]. This study presents a thermal model of the PVT subsequently validated by experimental data.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Parabolic Trough Photovoltaic/Thermal Collectors: Design and Simulation Model

Calise

Vanoli

2012

Energies

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“…This would mean lower temperatures and thus slightly lower thermal losses. This difference is however small and has little impact on the results [3]. Since the investigated collector has a closed structure it was not possible to measure the cell temperature directly.…”

Section: Methodsmentioning

confidence: 99%

“…Active glazed area was defined as the glazed area where the incident radiation can contribute to electricity production, i.e. the area on top of the cells and the area on top of the reflector in front of the cells, excluding edges, spaces between cells and parts where there was no reflector [3]. Figure 2 shows the electrical connection in red and the water connections in blue.…”

Section: Introductionmentioning

confidence: 99%

Measurements of the Electrical Incidence Angle Modifiers of an Asymmetrical Photovoltaic/Thermal Compound Parabolic Concentrating-Collector

Bernardo¹

2013

ENG

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Reflector edges, sharp acceptance angles and by-pass diodes introduce large variations in the electrical performance of asymmetrical concentrating photovoltaic/thermal modules over a short incidence angle interval. It is therefore important to quantify these impacts precisely. The impact on the electrical performance of the optical properties of an asymmetrical photovoltaic/thermal CPC-collector was measured in Maputo, Mozambique. The measurements were carried out with the focus on attaining a high resolution incidence angle modifier in both the longitudinal and transversal directions, since large variations were expected over small angle intervals. A detailed analysis of the contribution of the diffuse radiation to the total output was also carried out. The solar cells have an electrical efficiency of 18% while the maximum measured electrical efficiency of the collector was 13.9% per active glazed area and 20.9% per active cell area, at 25˚C. Such data make it possible to quantify not only the electrical performance for different climatic and operating conditions but also to determine potential improvements to the collector design. The electrical output can be increased by a number of different measures, e.g. removing the outermost cells, turning the edge cells 90˚, dividing each receiver side into three or four parts and directing the tracking, when used, along a north-south axis.

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An experimental implementation and testing of a concentrated hybrid photovoltaic/thermal system with monocrystalline solar cells using linear Fresnel reflected mirrors

2019

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Summary Integration of solar concentrators with photovoltaic (PV) systems reduces the required number of PV panels, which often account for the major costs of PV systems. The linear Fresnel reflector mirror is considered more effective because of its simplicity and effortless fabrication. An experimental test rig of a concentrated PV/thermal system that employs a linear configuration and horizontal absorber was built for evaluating its electrical and thermal performances. The considered concentrator consists of various widths of flat glass mirrors, which positioned with different angles, and with sun light focusing on the PV cells that fixed over an active cooling system. The experimental investigation of the proposed concentrated PV/thermal system shows that higher electrical and thermal efficiencies can be achieved at comparatively high temperature levels than that typically utilized in a nonconcentrated PV/thermal system. The characteristics of PV cells also indicate that the electrical efficiency values in case of no concentration and with concentration ratio of 6.0 are 9.6%, and 11%, respectively. The measured values for the inlet and outlet cooling water temperatures of the receiver showed that the maximum outlet temperature reached was 75°C with a flow rate of 0.025 L/min, and the product thermal efficiency was 62.3%. These obtained results illustrate an adequate and good thermal and electrical performance under the meteorological weather conditions of the province of Al‐Karak in Jordan.

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Performance evaluation of low concentrating photovoltaic/thermal systems: A case study from Sweden

Cited by 110 publications

References 10 publications

Parabolic Trough Photovoltaic/Thermal Collectors: Design and Simulation Model

Parabolic Trough Photovoltaic/Thermal Collectors: Design and Simulation Model

Measurements of the Electrical Incidence Angle Modifiers of an Asymmetrical Photovoltaic/Thermal Compound Parabolic Concentrating-Collector

An experimental implementation and testing of a concentrated hybrid photovoltaic/thermal system with monocrystalline solar cells using linear Fresnel reflected mirrors

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