Analysis of a temperature dependent optical window for nanofluid-based spectral splitting in PV/T power generation applications

2017 ◽  
Vol 151 ◽  
pp. 23-31 ◽  
Author(s):  
Wei An ◽  
Jun Li ◽  
Jun Ni ◽  
Robert A. Taylor ◽  
Tong Zhu
Keyword(s):  
Power Generation ◽  
Temperature Dependent ◽  
Optical Window ◽  
Spectral Splitting

A Feasibility Investigation on Improving Structural Integrity of Thermoelectric Modules With Varying Geometry

2012 ◽  
Author(s):  
Ugur Erturun ◽  
Karla Mossi
Keyword(s):  
Power Generation ◽  
Material Properties ◽  
Thermal Stresses ◽  
Structural Integrity ◽  
Temperature Dependent ◽  
Thermoelectric Modules ◽  
Geometry Model ◽  
Von Mises ◽  
Von Mises Stresses ◽  
Ansys Workbench

This study investigates the feasibility of improving the structural integrity of thermoelectric modules (TEMs) with varying geometry. For this purpose, six different TEM models with various thermoelectric leg geometries were designed and modeled in order to perform a thermal stress FEA using ANSYS Workbench. Temperature dependent material properties were used since some properties such as coefficients of thermal expansion change with temperature. Significant decrease in thermal stresses and leg deformations were observed with some models. Particularly, the cylindrical TE leg geometry model has approximately 54% lower Von Mises stresses (294MPa) and 13% lower TE leg deformations (3.9μm) than those of the typical TE leg geometry model (635MPa and 4.5μm). Power generation analyses of the models were performed to evaluate the effect of new TE leg geometries on the performance. TEM model with cylindrical TE leg geometry has the highest power generation (29.3mW) among all the models.

Test of a spectral splitting prototype hybridizing photovoltaic and solar syngas power generation

2021 ◽  
Vol 304 ◽  
pp. 117779
Author(s):  
Xueli Xing ◽  
Yu Xin ◽  
Fan Sun ◽  
Wanjun Qu ◽  
Hui Hong ◽  
...  
Keyword(s):  
Power Generation ◽  
Spectral Splitting

Pyroelectric power generation in PLZST material by temperature dependent phase transformation

2021 ◽  
Author(s):  
Hironari Sugiyama ◽  
Juyong Kim ◽  
Satoru Yamanaka ◽  
Yoonho Kim ◽  
Nguyen Chi Trung Ngo ◽  
...  
Keyword(s):  
Power Generation ◽  
Phase Transformation ◽  
Temperature Dependent

A spectral-splitting photovoltaic-thermochemical system for energy storage and solar power generation

2020 ◽  
Vol 260 ◽  
pp. 113631 ◽  
Author(s):  
Yunyi Ling ◽  
Wenjia Li ◽  
Jian Jin ◽  
Yuhang Yu ◽  
Yong Hao ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Solar Power ◽  
Solar Power Generation ◽  
Spectral Splitting

Thermal Analysis of Some Subterrene Penetrators

1976 ◽  
Vol 98 (3) ◽  
pp. 485-490 ◽  
Author(s):  
H. N. Fisher
Keyword(s):  
Power Generation ◽  
Thermal Analysis ◽  
Heat Conduction ◽  
Material Properties ◽  
Thermal Analyses ◽  
Heat Pipes ◽  
Rock Properties ◽  
Internal Temperature ◽  
Temperature Dependent ◽  
Advance Rate

Various types of rock melting drills have been designed at Los Alamos. These have included density consolidating penetrators up to 90 mm in diameter of varying configurations. A number of these consolidators have been tested in loams, alluvium, and tuff. Extruders up to 87 mm in diameter designed for an improved advance rate have been used in alluvium and basalt. The results of thermal analyses of some of these existing penetrators under conditions of constant advance rate in tuff, alluvium, and basalt are presented. The basic finite element heat conduction code (AYER) used in the calculations is briefly reviewed along with the methods of including radiation, temperature dependent material properties, and power generation. The internal temperature distribution, power requirements, and possible advance rates are determined for various consolidating and extruding penetrators. The effects of rock properties, penetrator configuration, and thermal limitations on the advance rate are considered. Heater designs and the use of heat pipes in specific designs are discussed. A comparison with experimental test data is made where possible.

A new generation of highly sensitive luminescent thermometers operating in the optical window of biological tissues

2016 ◽  
Vol 4 (24) ◽  
pp. 5559-5563 ◽  
Author(s):  
Lukasz Marciniak ◽  
Artur Bednarkiewicz ◽  
Diana Kowalska ◽  
Wieslaw Strek
Keyword(s):  
High Sensitivity ◽  
Biological Tissues ◽  
Temperature Dependent ◽  
Optical Window ◽  
Highly Sensitive ◽  
New Type ◽  
New Generation ◽  
First Time

A new type of luminescent thermometer based on highly temperature dependent d–d Cr3+ transitions related to barely temperature dependent f–f Nd3+ transitions for bio-application is reported for the first time, showing exceptionally high sensitivity.

(111) Monocrystalline Nickel Films

1972 ◽  
Vol 30 ◽  
pp. 512-513
Author(s):  
T.E. Pratt ◽  
R.W. Vook
Keyword(s):  
Film Thickness ◽  
Deposition Rate ◽  
Room Temperature ◽  
Narrow Range ◽  
High Vacuum ◽  
Residual Pressure ◽  
Temperature Dependent ◽  
Deposition Parameters ◽  
Transmission Electron ◽  
Substrate Temperatures

(111) oriented thin monocrystalline Ni films have been prepared by vacuum evaporation and examined by transmission electron microscopy and electron diffraction. In high vacuum, at room temperature, a layer of NaCl was first evaporated onto a freshly air-cleaved muscovite substrate clamped to a copper block with attached heater and thermocouple. Then, at various substrate temperatures, with other parameters held within a narrow range, Ni was evaporated from a tungsten filament. It had been shown previously that similar procedures would yield monocrystalline films of CU, Ag, and Au.For the films examined with respect to temperature dependent effects, typical deposition parameters were: Ni film thickness, 500-800 A; Ni deposition rate, 10 A/sec.; residual pressure, 10-6 torr; NaCl film thickness, 250 A; and NaCl deposition rate, 10 A/sec. Some additional evaporations involved higher deposition rates and lower film thicknesses.Monocrystalline films were obtained with substrate temperatures above 500° C. Below 450° C, the films were polycrystalline with a strong (111) preferred orientation.

Sign in / Sign up

Export Citation Format

Share Document