Modelling an actively-cooled CPV system

Buonomano, Annamaria; Mittelman, Gur; Faiman, D.; Biryukov, S.; Melnichak, V.; Bukobza, D.; Kabalo, S.

doi:10.1063/1.4753876

Cited by 12 publications

(5 citation statements)

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“…Besides, the thermal model of CPVT collectors fairly good matches with experimental data listed in Table 7 [10]. Other subsystems are presented with verified models existed in literature.…”

Section: Model Verificationmentioning

confidence: 76%

“…Each selected CPVT, concentrates the light 555 times on a 114 mm Â 135 mm receiver [10]. Using Mittleman et al equation, the provided electrical power is [5]: h PV is a function of both temperature of cells and the light intensity, however its dependency to intensity is relatively low and thus usually ignored in literature [11,12].…”

Section: Cpvt Collectormentioning

confidence: 99%

“…For CPVT, a one-dimensional heat transfer model was applied (this simplification is supported by the fact that side losses of absorbed heat by CPVTs should be minimized [10,14,15]) as illustrated in Fig. 3, and for this geometry, the equivalent thermal layers are given in Table 1 [3,13,16].…”

Section: Cpvt Collectormentioning

confidence: 99%

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Optimization of combined cooling, heating and power generation by a solar system

Sanaye

Sarrafi

2015

Renewable Energy

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a b s t r a c tIn this paper energy, exergy and economic optimization of a combined cooling, heating and power (CCHP) solar generation system equipped with conventional photovoltaic (PV), concentrated photovoltaic/thermal (CPVT), and evacuated tube (ET) collectors is presented. Optimization was performed to achieve the highest values of relative net annual benefit (RNAB) and exergy efficiency as two objectives. Decision or design parameters were the number of CPVT collectors, the number of ET collectors, the number of PV collectors as well as the capacity of batteries and the size of hot water storage tank. Optimum values of design parameters with maximizing objective functions were performed by NSGA-II multi-objective optimization technique. LINMAP method was used to select one optimum point among many others which had constructed the Pareto front curve. The chosen point used only 3 CPVT collectors and specific water storage tank volume without any battery. Sensitivity analysis of effects of changes in fuel and electricity prices as well as equipment investment costs on optimum values of design parameters were also investigated. Finally the equipment selection results for a full CPVT solar energy system connected to the grid and disconnected to the grid (remote area) were also compared and reported.

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“…Besides, the thermal model of CPVT collectors fairly good matches with experimental data listed in Table 7 [10]. Other subsystems are presented with verified models existed in literature.…”

Section: Model Verificationmentioning

confidence: 76%

Section: Cpvt Collectormentioning

confidence: 99%

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Optimization of combined cooling, heating and power generation by a solar system

Sanaye

Sarrafi

2015

Renewable Energy

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“…In addition, Lee et al [18] studied the influences of different design parameters on thermal performance of the cooling system for CPV system through CFD simulation. Buonomano et al [19] constructed a 1D model of the heat flow in a watercooled CPV receiver. They found that the model seems to give reasonable results even when the module exposed to the concentration factor up to 1000 suns.…”

Section: Mathematic Descriptionmentioning

confidence: 99%

Thermal Analysis of Direct Liquid-Immersed Solar Receiver for High Concentrating Photovoltaic System

Han

Wang

Zheng

et al. 2015

International Journal of Photoenergy

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Concentrator solar cells that operate at high solar concentration level must be cooled. In this paper, direct liquid immersion cooling of triple-junction solar cells (InGaP/InGaAs/Ge) is proposed as a heat dissipation solution for dense-array high concentrating photovoltaic (HCPV) systems. The advantages of triple-junction CPV cells immersed in a circulating dielectric liquid and dish HCPV technology are integrated into a CPV system to improve the system electrical conversion efficiency. An analytical model for the direct liquid-immersed solar receiver with triple-junction CPV cells is presented. The main outputs of the model are the components temperatures of the receiver and the system electrical efficiency. The influence of concentration factor, mass flow rate, and inlet liquid temperature on the operating temperature of the triple-junction CPV cells and the system electrical conversion efficiency are discussed. It is shown that the system electrical conversion efficiency is very high for a wide range of operating conditions. The three operating parameters have a major effect on the operating temperature of the triple-junction CPV cells and, by extension, system output power. The flow rate selection should match concentration factor to keep the triple-junction CPV cells temperature lower and increase the electrical conversion efficiency of the dense-array HCPV system.

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“…Similarly, the availability of theoretical and experimental studies investigating CPVT performance is scarce. In particular, Buonomano et al (2012;Kribus et al, 2006;Mittelman et al, 2007a;2007b) performed some experimental and theoretical works dealing with CPVT systems. In reference (Mittelman et al, 2007a) presented a novel miniature CPVT based on a dish concentrator (0.95 m 2 ) and a silicon PV cell.…”

Section: Introductionmentioning

confidence: 99%

Design and Dynamic Simulation of a Combined System Integration Concentrating Photovoltaic/Thermal Solar Collectors and Organic Rankine Cycle

Calise¹,

d’Accadia²,

Vicidomini³

et al. 2015

American Journal of Engineering and Applied Sciences

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This study presents the design of a novel ultra-high efficient solar power system. The system is equipped with a concentrating PhotoVoltaic/Thermal (CPVT) solar collectors bottomed by an Organic Rankine Cycle (ORC). The basic idea is to use a high temperature CPVT device producing simultaneously electricity and hot diathermic oil. Then, this hot fluid is used to supply heat to the Organic Rankine Cycle producing additional electricity. The collector is based on a combination of a parabolic dish concentrating solar thermal collector and a high efficiency solar photovoltaic collector. Among the possible high-temperature PVT systems, this paper is focused on a system consisting in a dish concentrator and in a triple-junction PV layer. In particular, the prototype consists in a parabolic dish concentrator and a planar receiver. The system is equipped with a double axis tracking system. The bottom surface of the receiver is equipped with triple-junction silicon cells whereas the top surface is insulated. Similarly, the ORC subsystem is equipped with tube and shell heat exchangers, a pump and an expander. In order to analyze the performance of the CPVT collector and ORC cycle, detailed mathematical models were implemented. These models are based on zero-dimensional energy balances on the control volumes of the system. The simulation model allows one to calculate in detail the temperatures of the main components of the system and the main energy flows. Both CPVT and ORC models are integrated in a more complex dynamic simulation model, developed in TRNSYS environment. Here, additional components are included in the system: Pump, tank, controllers, valves, etc. The input parameters of the model include weather conditions (temperature, insolation, wind velocity, etc.) and the geometrical/material parameters of the systems. This novel system was compared with a more conventional one, consisting of a concentrating PV collector equipped with III-V cells. Results showed that such second system (only CPVT) is more profitable from an economical point of view, with a 20 years Net Present Value 15% higher than the novel system (CPVT+ORC). Conversely, the novel (ORC+CPVT) system produces 6% more electrical energy.

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Modelling an actively-cooled CPV system

Abstract: We have constructed a 7-node, 1-dimensional model of the heat flow in a water-cooled CPV receiver. The model is validated against data from a module exposed to solar irradiance at various concentrations up to 1,000X at the PETAL solar dish facility at Sede Boqer

Cited by 12 publications

References 0 publications

Optimization of combined cooling, heating and power generation by a solar system

Optimization of combined cooling, heating and power generation by a solar system

Thermal Analysis of Direct Liquid-Immersed Solar Receiver for High Concentrating Photovoltaic System

Design and Dynamic Simulation of a Combined System Integration Concentrating Photovoltaic/Thermal Solar Collectors and Organic Rankine Cycle

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