Design, modeling and performance monitoring of a photovoltaic–thermal (PVT) water collector

Aste, N.; Leonforte, Fabrizio; Pero, Claudio Del

doi:10.1016/j.solener.2014.11.025

Cited by 157 publications

(58 citation statements)

References 27 publications

(25 reference statements)

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“…Chow [10] analyzed a PVT collector by means of a complex tridimensional dynamic model, based on the finite-difference approach. Simplified approaches based on 1-D models have been developed by some researchers [11][12][13]. They introduced some simplifications such as negligible heat losses at the edges of the panel, constant physical properties of components, perfect contact between the PV sandwich and the plate heat exchanger below, sky as a black body.…”

Section: Methodsmentioning

confidence: 99%

ulti-Source Heat Pump Coupled with a Photovoltaic Thermal (PVT) Hybrid Solar Collectors Technology: a Case Study in Residential Application

Emmi¹,

Tisato²,

Zarrella³

et al. 2016

Int. J. EQ

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Nowadays the heat pump technology is an efficient solution in the residential sector since it allows to reduce CO 2 emissions and to exploit renewable energy sources. At the same time, the solar energy is the renewable source for excellence.In this study, different combinations of a photovoltaic thermal hybrid solar collector (PVT) and a multi-source heat pump for space heating and domestic hot water (DHW) production have been investigated. The air, solar and ground heat sources for the heat pump were analysed. The case study regards the heat demand of a single-family house building located in north-east of Italy. The considered system configurations have been investigated by means of the simulation tool TRNSYS coupled to a dedicated mathematical model for the estimation of the electrical and thermal performances of solar panels. This model is based on the equivalent electrical circuit.As a result, all the investigated multi-source systems reported an increase of energy efficiency between 14% and 26% compared to a standard air to water heat pump system. The system with air and solar sources has an energy efficiency equal to 3.64, slightly lower than that obtained for the more complex systems.

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Section: Methodsmentioning

confidence: 99%

ulti-Source Heat Pump Coupled with a Photovoltaic Thermal (PVT) Hybrid Solar Collectors Technology: a Case Study in Residential Application

Emmi¹,

Tisato²,

Zarrella³

et al. 2016

Int. J. EQ

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“…PVT collectors are typically manufactured by using a conventional thermal collector whose absorber is covered with a suitable PV layer. The thermal energy is distributed to a fluid, typically air [5] or water [6][7][8], whereas the PV layer produces electricity [3,4]. The overall result of this technology is a simultaneous production of electricity and heat [9], with a reduction of the PV modules' electrical efficiency losses.…”

Section: Introductionmentioning

confidence: 99%

“…The obtained results (also tested experimentally) showed that although a PV system produces about 38% more electrical energy, the studied PVT system also covers, depending on the location, a large percentage of the hot water needs. Aste et al [6] designed an experimental innovative water glazed PVT component, consisting of a thin film PV technology and a roll-bond flat plate absorber, and developed a mathematical model for the prediction of the electrical and thermal outputs. Through such a model, validated by means of the obtained experimental data, the daily mean electrical efficiency of the PVT resulted to be about 6.0%, whereas the PV module showed a daily average efficiency of 6.2%.…”

Section: Introductionmentioning

confidence: 99%

Design, Simulation and Experimental Investigation of a Solar System Based on PV Panels and PVT Collectors

2016

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This paper presents numerical and experimental analyses aimed at evaluating the technical and economic feasibility of photovoltaic/thermal (PVT) collectors. An experimental setup was purposely designed and constructed in order to compare the electrical performance of a PVT solar field with the one achieved by an identical solar field consisting of conventional photovoltaic (PV) panels. The experimental analysis also aims at evaluating the potential advantages of PVT vs. PV in terms of enhancement of electrical efficiency and thermal energy production. The installed experimental set-up includes four flat polycrystalline silicon PV panels and four flat unglazed polycrystalline silicon PVT collectors. The total electrical power and area of the solar field are 2 kWe and 13 m 2 , respectively. The experimental set-up is currently installed at the company AV Project Ltd., located in Avellino (Italy). This study also analyzes the system from a numerical point of view, including a thermo-economic dynamic simulation model for the design and the assessment of energy performance and economic profitability of the solar systems consisting of glazed PVT and PV collectors. The experimental setup was modelled and partly simulated in TRNSYS environment. The simulation model was useful to analyze efficiencies and temperatures reached by such solar technologies, by taking into account the reference technology of PVTs (consisting of glazed collectors) as well as to compare the numerical data obtained by dynamic simulations with the gathered experimental results for the PV technology. The numerical analysis shows that the PVT global efficiency is about 26%. Conversely, from the experimental point of view, the average thermal efficiency of PVT collectors is around 13% and the electrical efficiencies of both technologies are almost coincident and equal to 15%.

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“…In order to further stimulate an increased number of energy efficient buildings, the Energy Performance of Buildings Directive [8] states that after 31 December 2020, all new buildings will be Nearly Zero Energy Buildings (nZEBs), namely buildings with very high energy performance where the nearly zero or very low amount of energy required should be extensively covered by renewable sources produced onsite or nearby [9] [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental measurements of the thermal conductivity of insulant elements made of natural materials: preliminary results

Baccilieri¹,

Bornino²,

Fotia³

et al. 2016

IJHT

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Current policies addressing the energy efficiency of building constructions urge planners and manufacturers to properly design the edifice envelope which has to be conceived with a view to both optimizing its thermal performances and complying with the local and national regulations. To achieve this target, for the last few years, researchers involved in building industry have been devising new structures able to realize proper levels of envelope thermal insulation, also employing materials characterized by low environmental impacts owing to their natural origin (such as vegetal fibers) or because derived from industrial/ agricultural process waste. As a contribution to this topic, the purpose of this paper is to assess the insulation features of various structures made up of totally natural and biocompatible materials, in order to try to single out the optimal configurations. The studied mixtures, as a matter of fact, consist of a natural binder (such as hydraulic lime NHL 3.5) and a biocompatible inert material (such as dry platanus acerifolia fruit, natural cork, etc.) with various mass ratio compositions. The measured parameter is the thermal conductivity and the method used is the one stated by the ASTM C518 -04 Standard, which employs a heat flow meter apparatus establishing steady state one-dimensional heat flux through a test specimen between two parallel plates at constant but different temperatures. Fourier's law of heat conduction is, hence, used to calculate thermal conductivity of the specimen.

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Design, modeling and performance monitoring of a photovoltaic–thermal (PVT) water collector

Cited by 157 publications

References 27 publications

ulti-Source Heat Pump Coupled with a Photovoltaic Thermal (PVT) Hybrid Solar Collectors Technology: a Case Study in Residential Application

ulti-Source Heat Pump Coupled with a Photovoltaic Thermal (PVT) Hybrid Solar Collectors Technology: a Case Study in Residential Application

Design, Simulation and Experimental Investigation of a Solar System Based on PV Panels and PVT Collectors

Experimental measurements of the thermal conductivity of insulant elements made of natural materials: preliminary results

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