Development of Vacuum Super Insulations with Glass Cover and Powder Filling

Thermal performance of a single-pass single-glass cover solar air heater consisting of semicircular absorber plate finned with rectangular longitudinal fins is investigated. The analysis is carried out for different hydraulic diameters, which were obtained by varying the diameter of the duct from 0.3–0.5 m. One to five numbers of fins are considered. Reynolds number ranges from 1600–4300. Analytical solutions for energy balance equations of different elements and duct flow of the solar air heater are presented; results are compared with finite-volume methodology based numerical solutions obtained from ansys fluent commercial software, and a fairly good agreement is achieved. Moreover, analysis is extended to check the effect of double-glass cover and the recycle of the exiting air. Results revealed that the use of double-glass cover and recycle operation improves the thermal performance of solar air heater.

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Modeling and experimental investigation of dust effect on glass cover PV module with fixed and tracking system under semi-arid climate

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2021.111219 ◽

2021 ◽

Vol 230 ◽

pp. 111219

Author(s):

Alae Azouzoute ◽

Charaf Hajjaj ◽

Houssain Zitouni ◽

Massaab El Ydrissi ◽

Oumaima Mertah ◽

...

Keyword(s):

Experimental Investigation ◽

Tracking System ◽

Arid Climate ◽

Glass Cover ◽

Pv Module ◽

Dust Effect ◽

Semi Arid

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Electric Field Directed Growth of Molecular Wires of Charge Transfer Molecules on Prefabricated Metal Electrodes

MRS Proceedings ◽

10.1557/proc-1058-jj05-03 ◽

2007 ◽

Vol 1058 ◽

Author(s):

T Phanindra Sai ◽

A K Raychaudhuri

Keyword(s):

Electron Beam ◽

Charge Transfer ◽

Electron Beam Lithography ◽

Molecular Wires ◽

Metal Electrodes ◽

Glass Cover ◽

Glass Cover Slip ◽

Single Complex ◽

Directed Growth ◽

The Difference

ABSTRACTMolecular wires of charge transfer molecules were formed by co-evaporating the 7 7 8 8-Tetracyanoquinodimethane [TCNQ] (acceptor) and Tetrathiafulvalene [TTF] (donor) molecules across prefabricated metal electrodes. Molecular wires of TTF TCNQ were also formed by evaporating single complex of TTF:TCNQ across prefabricated metal electrodes The prefabricated metal electrodes were made using electron beam lithography on SiO2 and glass cover slip substrates. Even though TTF: TCNQ wires grown from both co-evaporation and evaporation techniques show semiconductor like behavior in temperature dependence of resistance they show different activation energies due the difference in stoichiometry of TTF and TCNQ.

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