ORCID Profile
0000-0001-6713-9320
Current Organisations
UNSW Sydney
,
Commonwealth Scientific and Industrial Research Organisation
,
CSIRO
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Publisher: Springer International Publishing
Date: 2023
Publisher: American Chemical Society (ACS)
Date: 19-05-2020
Publisher: IEEE
Date: 05-2014
Publisher: Wiley
Date: 15-03-2021
Publisher: Elsevier BV
Date: 08-2019
Publisher: IEEE
Date: 12-2014
Publisher: Hindawi Limited
Date: 15-07-2020
DOI: 10.1155/2020/8825489
Abstract: Solar photovoltaic (PV) and solar thermal systems are most widely used renewable energy technologies. Theoretical study indicates that the energy conversion efficiency of solar photovoltaic gets reduced about 0.3% when its temperature increases by 1°C. In this regard, solar PV and thermal (PVT) hybrid systems could be a solution to draw extra heat from the solar PV panel to improve its performance by reducing its temperature. Here, we have designed a new type of heat exchanger for solar PV and thermal (PVT) hybrid systems and have studied the performance of the system. The PVT system has been investigated in comparison with an identical solar PV panel at outdoor condition at Dhaka, Bangladesh. The experiments show that the average improvement of open circuit voltage (Voc) is 0.97 V and the highest improvement of Voc is 1.3 V. In addition, the overall improvement of output power of solar PV panel is 2.5 W.
Publisher: The Royal Society
Date: 10-2019
DOI: 10.1098/RSOS.190870
Abstract: Electron-doped SrTiO 3 is a well-known n -type thermoelectric material, although the figure of merit of SrTiO 3 is still inferior compared with p -type metal oxide-based thermoelectric materials due to its high lattice thermal conductivity. In this study, we have used a different amount of the non-ionic surfactant F127 during s le preparation to introduce nanoscale porosities into bulk s les of La-doped SrTiO 3 . It has been observed that the porosities introduced into the bulk s le significantly improve the Seebeck coefficient and reduce the thermal conductivity by the charge carrier and phonon scattering respectively. Therefore, there is an overall enhancement in the power factor (PF) followed by a dimensionless figure of merit ( zT ) over a wide scale of temperature. The s le 20 at% La-doped SrTiO 3 with 600 mg of F127 surfactant (SLTO 600F127) shows the maximum PF of 1.14 mW m −1 K −2 at 647 K which is 35% higher than the s le without porosity (SLTO 0F127), and the same s le (SLTO 600F127) shows the maximum value of z T is 0.32 at 968 K with an average enhancement of 62% in zT in comparison with the s le without porosity (SLTO 0F127).
Publisher: IEEE
Date: 09-2014
Location: Australia
Location: Australia
No related grants have been discovered for Al Jumlat Ahmed.