1,720,970 research outputs found
Experimental Characterization of a New Hybrid Thermophotovoltaic Industrial Prototype
No full textAbstractThe described work involves the construction and experimental characterization of a new hybrid thermophotovoltaic prototype panel for small vessels and vehicles applications. The first prototype, previously numerically optimized by genetic algorythm, has been entirely built in the university lab in Forlì. Concerning the presented results, they show some of the last outdoor experimental analysis under specific site outdoor conditions. Subsequently the aim of this analysis has been to evaluate further improvements data concerning concept design in order to ensure for next prototypes the optimal integration of mechanical properties and specific output requirements requested by users
Innovative Thermophotovoltaic Hybrid Resin Tile
Full text linkThe product developed and here presented is the result of a widespread research project
related to hybrid thermophotovoltaic panels. Starting from the numerical analysis, experimental testing and
relative optimization of different hybrid solutions, we moved on final prototyping of an innovative
thermophotovoltaic bi-resin walkable tile suitable for covering different kinds of surfaces subjected to solar
radiation. The tile is made up of a layer of photovoltaic cells placed in contact, by means of a thermoconductive
paste, with an aluminum alloy heat sink which transfers the heat from the cells to the water flow. The bottom of
the heat sink and the hydraulic and electrical connectors are encapsulated in an opaque insulated resin. The top
and the cells are covered with a transparent resin. This solution is suitable for any flat surface exposed to solar
irradiance (often not usable and / or unused from an energy point of view) allowing a double energy output
(thermal and electric) and a guaranteed walkability 365 days a year
Integrated PV-TEG Cooling System and Support
Full text linkBeing continuously exposed to solar radiation, photovoltaic cells usually overheat, resulting in rapid degradation over time. For the same reason, the efficiency of energy production also decreases. To overcome these problems, the proposed integrated TEG cooling system removes heat from the cells during periods of strong solar radiation. In contrast to existing products that use the Seebeck or Peltier effect, within the patented system, the given Seebeck effect occurs internally at the same heat sink that acts as a support for the cells and only a small part of the removed heat is used to create the required temperature difference. The invention concerns a drastic simplification of solar cell cooling and thermoelectric conversion technology. This also allows for cascading economic advantages in terms of overall system costs. A preliminary numerical analysis was carried out to analyse the characteristics of the prototype
Use of microspheres in thermally insulating hybrid solar panels
No full textIn this work the problem of thermally insulating a PhotoVoltaic Thermal (PVT) hybrid solar panel is investigated. In particular, a
PVT panel designed to be laid on the ground like a tile is considered. Such a hybrid solar tile, previously presented, is resistant,
walkable and can be used to cover places, terraces and roof. It consists in a core composed of a photovoltaic cell layer placed in
contact with an aluminum heat sink which transfers heat from the cells to a water flow. This core
is coated on the upper side with
a transparent epoxy resin and on the lower and lateral sides with an opaque epoxy resin. To thermally insulate such a panel, the
insertion of microspheres in the opaque resin is then considered. In particular, the maximum concentration of the microspheres
acceptable with respect to the production process is evaluated. Moreover, the effect
on the heat dispersed by the panel, which is
produced by inserting microspheres in the opaque resin, is experimentally investigated. Some preliminary results are presented
showing reductions in the dispersed heat
Experimental dataset of seasonal behaviour of a hybrid solar tile
Full text linkThe state of the art of research related to thermophotovoltaic hybrid panels has been widely described by Zondag et al. [1,2] and Michael et al. [3]. Through a seasonal experimental campaign, conducted with an outdoor test bench in Forlì (North-East of Italy), a hybrid thermophotovoltaic tile has been investigated. The double resin hybrid tile, patented by University of Bologna, is mechanically resistant, walkable and can be used to cover surfaces in order to obtain a full exploitation of the horizontal covers from an exergetic and functional point of view. The glass cover is replaced with a resin one that aims to achieve comparable optical properties but also to improve the mechanical characteristics, making it walkable and facilitating cleaning and maintenance. An extensive dataset was collected over several days of seasonal testing with the aim of determining its electrical and thermal performance compared to commercial PV (photovoltaic) panels of the same size placed in the same experimental apparatus
Innovativa piastrella termofotovoltaica calpestabile in resina.
No full textLa piastrella sviluppata dagli inventori è costituita da uno strato di celle
fotovoltaiche poste a contatto, mediante pasta termoconduttiva, con un
dissipatore di calore in lega di alluminio che trasferisce il calore dalle celle
al flusso d'acqua. La parte inferiore del dissipatore di calore e i connettori
idraulici ed elettrici sono incapsulati in una resina opaca e termoisolante.
La parte superiore e le celle sono ricoperte da una resina trasparente.
Tale soluzione risulta idonea per qualunque superficie piana esposta
all'irraggiamento solare, spesso non fruibile e/o inutilizzata dal punto di
vista energetico, permettendo una doppia fruizione energetica (termica ed
elettrica) ed una garantita calpestabilità 365 giorni l’anno
Pannello termofotovoltaico e procedimento di realizzazione di pannello termfotovoltaico
No full textL'oggetto brevettato è un pannello termofotovoltaico di tipologia innovativa, che può essere utilizzato per pavimentare piazzali o terrazzi oppure per ricoprire tetti. Il pannello è costituito da uno strato di celle fotovoltaiche posate su di un blocco di alluminio nel quale sono stati ricavati dei canali all'interno dei quali scorre una portata di acqua. Lo stato di celle e lo scambiatore di calore di alluminio sono rivestiti con una resina trasparente sulla parte superiore e con una opaca su quella inferiore. La resina opaca è utilizzata anche per creare gli appoggi del pannello, che ne consentono la posa sopra una rete di tubazioni e di cavi. Il pannello viene realizzato mediante colatura delle resine in un particolare stampo
Thermal Characterization of Radiative and Convective Heating Devices
No full textIn this work the thermal performances of innovative heating devices are analyzed with the help of a numerical model. The innovative devices, Thermosaic Plus and Thermosaic Comfort produced by Xinergia, are first evaluated under the UNI EN 442 conditions. Their performances are then analyzed under conditions closer to the real working ones. The differences in the results of the two analysis are put in evidence. Moreover the performances of the innovative heating devices are compared to those of traditional tubolar ones. Criteria for evaluating the heating device efficiency are also proposed and applied to the analysis, taking the perceived comfort into account. Referring to these criteria, large reductions in the absorbed thermal power are found for the innovative devices with respect to the power required by the traditional tubular ones
Experimental characterization of a hybrid industrial solar tile
No full textIn this work an innovative hybrid solar panel is presented. The panel is particularly resistant. It is walkable and can be used as a tile to cover places, terraces and roofs. It consists in a photovoltaic cell layer placed in contact with an aluminium heat sink which transfers heat from the cells to a water flow. The lower part of the heat sink and the hydraulic and electrical connectors are encapsulated in an opaque and insulating resin. The upper part and the cells are covered with a transparent resin. The heat sink consists in an aluminium block in which some channels and the input and output plena are created. In the prototype version of the panel, a circular section has been assigned to the channels. Some preliminary results are presented, which have been obtained on the hybrid panel prototype. In particular the efficiency of the photovoltaic cells has been investigated by changing the water temperature and flow under different solar conditions
Performance evaluation of a metal foam heat sink for solar hybrid panels
No full textIn the present work a metal foam heat sink is presented, which is suitable for hybrid solar panels. The heat sink is designed to be placed in contact with a layer of photovoltaic cells, removing from them the heat resulting from the solar radiation. It is composed of an aluminum box containing an aluminum open-cell foam, through which a water flow is forced. Some preliminary measurements are presented. In particular the pressure drops between the inlet and outlet water plena and the global heat transfer effectiveness are shown under different conditions
- …
