scholarly journals Preliminary Requirements for Thermal Storage Subsystems in Solar Thermal Applications

1980 ◽  
Author(s):  
Not Given Author
Keyword(s):  
Thermal Storage ◽  
Solar Thermal ◽  
Solar Thermal Applications

Investigation of Nanofluids for Solar Thermal Storage Applications

2009 ◽  
Author(s):  
Donghyun Shin ◽  
Debjyoti Banerjee
Keyword(s):  
Thermal Conductivity ◽  
Specific Heat ◽  
Transport Properties ◽  
Experimental Studies ◽  
Thermal Storage ◽  
Nano Particles ◽  
Solar Thermal ◽  
Optimum Performance ◽  
Solar Thermal Applications

Nanofluids are synthesized by doping solvents with nano-particles at minute concentrations (typically less than 1 percentage by volume). Experimental studies have shown that nano-particles can dramatically enhance the specific heat of various liquid solvents. This is also associated with enhancement of other transport properties (e.g., viscosity, thermal conductivity, diffusivity, etc.). Hence, nanofluids are attractive materials for solar thermal applications. The objective of this study is to investigate the optimum performance of various nanofluids for solar thermal storage applications. Dimensional analyses and similitude techniques will be used to theoretically estimate the enhancement of transport properties of various nanofluids to predict their efficacy for solar thermal storage applications.

Enhanced Thermal Properties of PCM Based Nanofluid for Solar Thermal Energy Storage

2010 ◽  
Author(s):  
Donghyun Shin ◽  
Debjyoti Banerjee
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Transport Properties ◽  
Experimental Studies ◽  
Thermal Storage ◽  
Nano Particles ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Heat Diffusivity ◽  
Solar Thermal Applications

Nanofluids are synthesized by doping solvents with nano-particles at minute concentrations (typically less than 1 percentage by volume). Experimental studies have shown that nano-particles can dramatically enhance thermal conductivity of various liquid solvents. This is also associated with enhancement of other transport properties (e.g., viscosity, specific heat, diffusivity, etc.). Hence, nanofluids are attractive materials for solar thermal applications. The objective of this study is to investigate the optimum performance of various nanofluids for solar thermal storage applications. Dimensional analyses and similitude techniques will be used to theoretically estimate the enhancement of transport properties of various nanofluids to predict their efficacy for solar thermal storage applications.

A simple and clean method to prepare SiC-containing vitreous ceramics for solar thermal storage in the clay-feldspar system

2020 ◽  
Vol 248 ◽  
pp. 119257 ◽  
Author(s):  
Xinbin Lao ◽  
Xiaoyang Xu ◽  
Weihui Jiang ◽  
Jian Liang ◽  
Huan Liu
Keyword(s):  
Thermal Storage ◽  
Solar Thermal

Fault Analysis of Solar Thermal Systems in Bhutan

2021 ◽  
pp. 60-71
Author(s):  
Tshewang Darjay ◽  
Cheku Dorji ◽  
Tshewang Lhendup ◽  
Martin Elborg
Keyword(s):  
User Behavior ◽  
Policy Instrument ◽  
Fault Analysis ◽  
Solar Thermal ◽  
Second Phase ◽  
Thermal Systems ◽  
Field Surveys ◽  
Government Sector ◽  
Solar Thermal Applications ◽  
Secondary Information

The Royal Government of Bhutan has accorded the highest priority towards diversifying the energy-mix through the promotion of renewable energy technologies. There is a national target to generate 3 MW equivalent of energy from the installation of solar thermal systems alone. However, little investment and priority are given for development of solar thermal applications. Some of the present existing solar water heating (SWH) systems are exhibiting faults which leads to low consumer confidence in SWH technology due to the non-functioning of previous installations which is very detrimental in this introductory stage. This study aims to identify problems of existing SWH systems through field surveys and develop a draft guideline to avoid faults in the future. To analyse the problems with existing SWH systems in Bhutan, the first phase of the study consists of collecting secondary information and opinion from the relevant government sector, local installing companies and end-users. The information on the manufacturer’s products, policy barriers, markets and consumer challenges is also collected. Base on this information, findings on the limitation of existing policy instrument and gap in demand and supply side is described. The second phase of the study comprises field visits to existing SWH system sites. The field surveys of twelve representative existing SWH systems are analyzed. Out of twelve sites, eight SWH systems had critical faults which causes major failure of the system and the other four sites had minor faults. To analyse the faults of existing SWH systems, faults are classified into design faults, plumbing circuit faults, solar collector faults, absorber faults, installation faults and user behavior faults. The major faults which lead to the failure of the existing SWH system are plumbing failure, condensation inside the collector and absorber tube leakage. The causes and solutions of the faults are discussed.

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