Optimal design of orientation of PV/T collector with reflectors

Kostić, Lj.T.; Pavlović, Tomislav; Pavlovic, Zoran

doi:10.1016/j.apenergy.2010.02.015

Cited by 108 publications

(35 citation statements)

References 30 publications

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“…The fans were inverted to act like ordinary room fans to provide cooled air to the panel from the outside atmosphere. The increasing fan capacity increases the overall heat transfer and PV panel cooling performance but it is not advisable to increase the number of fans as it will increase the power consumption from the battery and reduce the overall efficiency of the system [26]. Experimental set up and arrangements of fans for an active air cooled system are shown in Figure 5.…”

Section: Closed Loop Water Loop Systemmentioning

confidence: 99%

“…For more protection, the reflective coating has applied the back side of glass. A beam of light reflects off a mirror at an angle of reflection equal to its angle of incidence, i.e., if the beam of light is shining on a mirror surface at a vertical angle, it reflects from the point of incidence at an angle in the opposite direction [25,26]. A convex mirror helps scatter the beam of light.…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of Photovoltaic Solar System with Different Cooling Methods and a Bi-Reflector PV System (BRPVS): An Experimental Study and Comparative Analysis

Khan

Ko²,

Nyari

et al. 2017

Energies

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Abstract:Reducing the price of solar photovoltaic (PV) systems has been a constant challenge. Despite recent advances, solar PV systems are still more costly than conventional energy resources. For the first time, this study examines the effectiveness of three different structures/materials: (i) silvered glass plane mirror; (ii) convex spherical mirrors; and (iii) aluminum (Al) foil as reflector. Comparative analysis of four different cooling techniques, i.e., water sprinkling system, passive heat sink method, active air fan method, and closed loop method, for enhancement of output power was performed. A novel Bi reflector solar PV system (BRPVS) was suggested to control the working of the reflectors. The Al foil enhanced the power output compared to the others. In addition, the effect of using a reflector on the temperature of a solar PV system was studied. High operating temperatures resulted in a decrease in the maximum output power under the same solar radiation conditions. The combined enhancement of the output power by both Al foil BRPVS system and cooling system was almost 22.75-38.55%. An optimal control algorithm to use cooling and BRPVS in an efficient manner is described.

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Section: Closed Loop Water Loop Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Photovoltaic Solar System with Different Cooling Methods and a Bi-Reflector PV System (BRPVS): An Experimental Study and Comparative Analysis

Khan

Ko²,

Nyari

et al. 2017

Energies

View full text Add to dashboard Cite

show abstract

“…The energy lost during the first hours in the morning and during the last hours in the afternoon is not as important as lost collector surface in the winter because of the tilted surface. As Kostic et al explain in [20], the angle β (collector tilted plane angle) determines notably the energy generated by hybrid collectors. Kostic optimizes with a tilt of 45º in Serbia.…”

Section: Solar Trigeneration -Yearly Simulationmentioning

confidence: 99%

Solar Trigeneration: a Transitory Simulation of HVAC Systems Using Different Typologies of Hybrid Panels

Sancho¹

2014

J. sustain. dev. energy water environ. syst.

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The high energy demand on buildings requires efficient installations and the integration of renewable energy to achieve the goal of reducing energy consumption using traditional energy sources. Usually, solar energy generation and heating loads have different profiles along a day and their maximums take place at different moments. In addition, in months in which solar production is higher, the heating demands are the minimum (hot water is consumed only domestically in summer). Cooling machines (absorption and adsorption) allow using thermal energy to chill a fluid. This heat flow rate could be recovered from solar collectors or any other heat source. The aim of this study is to integrate different typologies of solar hybrid (photovoltaic and thermal) collectors with cooling machines getting solar trigeneration and concluding the optimal combination for building applications. The heat recovered from the photovoltaic module is used to provide energy to these cooling machines getting a double effect: to get a better efficiency on PV modules and to cool the building. In this document the authors analyse these installations, their operating conditions, dimensions and parameters, in order to get the optimal installation in three different European cities. This work suggests that in a family house in Madrid, the optimal combination is to use CPVT with azimuthally tracking and absorption machine. In this case, the solar trigeneration system using 55 m 2 of collector area saves the cooling loads and 79% of the heating load in the house round the year.

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“…Although the geometric concentration ratio is defined by the ratio of area of the aperture and the absorber, the relative concentration ratio defined by Kostic, et al (2010) is a more practical expression of concentration ratio C, as shown in equation 1,…”

Section: Modelling the Optical Characteristics Of A Flat Reflectormentioning

confidence: 99%

Performance of a building integrated photovoltaic/thermal concentrator for facade applications

Piratheepan

Anderson

2017

Solar Energy

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The use of building integrated photovoltaic/thermal (BIPVT) concentrators is an effective way to harness solar energy within the built environment, particularly for façade applications. However, in order to precisely predict the overall performance of building integrated façade collectors it is crucial to have a validated model that represents such systems.In this study, a combined optical and thermal model was developed to describe the performance of a façade integrated BIPVT solar concentrator system and subsequently was validated with a physical prototype. Using the validated model, it was shown that key parameters such as tube spacing, and thermal conductivity between the solar cell and the absorber have a significant effect on the overall efficiency.Finally, it is suggested that façade integrated BIPVT solar concentrator systems would serve as a complement to roof mounted photovoltaic systems, and that this may be a step towards net zero energy buildings.

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Optimal design of orientation of PV/T collector with reflectors

Cited by 108 publications

References 30 publications

Performance Evaluation of Photovoltaic Solar System with Different Cooling Methods and a Bi-Reflector PV System (BRPVS): An Experimental Study and Comparative Analysis

Performance Evaluation of Photovoltaic Solar System with Different Cooling Methods and a Bi-Reflector PV System (BRPVS): An Experimental Study and Comparative Analysis

Solar Trigeneration: a Transitory Simulation of HVAC Systems Using Different Typologies of Hybrid Panels

Performance of a building integrated photovoltaic/thermal concentrator for facade applications

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