scholarly journals Li2CO3 as Protection for a High-Temperature Thermoelectric Generator: Thermal Stability and Corrosion Analysis

2021 ◽  
Vol 11 (16) ◽  
pp. 7597
Author(s):  
Gorka Argandoña ◽  
Maite Aresti ◽  
Jesus M. Blanco ◽  
Esteban Muel ◽  
Jesús Esarte
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
High Temperature ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Storage System ◽  
Thermal Storage ◽  
Lithium Carbonate ◽  
Thermoelectric Converter ◽  
Corrosive Effect

In most steelmaking processes, huge amounts of waste heat at high temperature (700–800 °C) are thrown into the environment without any use. An alternative use for this waste heat is electricity generation through thermoelectric generators. However, these high temperatures, as well as their fluctuations over time, affect not only the conversion rate of the thermoelectric generator but also its useful lifetime. The incorporation of a latent thermal energy storage (TES) system could be a solution; nevertheless, the thermal stability and corrosive effect of the (PCM) phase change material are key aspects for the thermal storage system definition, in terms of durability. In this work, developed in the framework of the European project “PowGETEG” (RFSR-CT-2015-00028, funded by the Research Fund for Coal and Steel), a high-temperature analysis (700–800 °C) of the Li2CO3 thermal properties, thermal stability and corrosive effect on the AISI 304 and AISI 310 stainless steels is carried out. The results show that the eutectic salt Li2CO3 exhibits high thermal stability with neither change in its thermal properties nor material degradation. This work shows that lithium carbonate Li2CO3 and AISI 310 make a very good combination for the definition of a thermal storage system able to protect a high-temperature thermoelectric converter from temperature variations, making it more reliable.

Thermal properties of KCl–MgCl2 eutectic salt for high-temperature heat transfer and thermal storage system

2021 ◽  
Vol 228 ◽  
pp. 111130
Author(s):  
Jianfeng Lu ◽  
Senfeng Yang ◽  
Zhenzhou Rong ◽  
Gechuanqi Pan ◽  
Jing Ding ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
High Temperature ◽  
Storage System ◽  
Thermal Storage ◽  
Eutectic Salt ◽  
Temperature Heat

Experimental Exploration of a Small Scale Pneumatically Pumped Thermal Storage System

2016 ◽  
Author(s):  
Inri Rodriguez ◽  
Jesus Cerda ◽  
Daniel S. Codd
Keyword(s):  
High Temperature ◽  
Storage Tank ◽  
Pulse Width Modulation ◽  
Low Cost ◽  
Storage System ◽  
Heat Engine ◽  
Thermal Storage ◽  
Heat Transfer Fluid ◽  
Small Scale ◽  
Constant Frequency

A prototype water-glycerol two tank storage system was designed to simulate the fluidic properties of a high temperature molten salt system while allowing for room temperature testing of a low cost, small scale pneumatically pumped thermal storage system for use in concentrated solar power (CSP) applications. Pressurized air is metered into a primary heat transfer fluid (HTF) storage tank; the airflow displaces the HTF through a 3D printed prototype thermoplate receiver and into a secondary storage tank to be dispatched in order to drive a heat engine during peak demand times. A microcontroller was programmed to use pulse-width modulation (PWM) to regulate air flow via an air solenoid. At a constant frequency of 10Hz, it was found that the lowest pressure drops and the slowest flowrates across the receiver occurred at low duty cycles of 15% and 20% and low inlet air pressures of 124 and 207 kPa. However, the data also suggested the possibility of slug flow. Replacement equipment and design modifications are suggested for further analysis and high temperature experiments. Nevertheless, testing demonstrated the feasibility of pneumatic pumping for small systems.

Evaluation of Thermal Properties of the Fe80Cr20 Nanostructure for Interconnect Application in High Temperature

2015 ◽  
Vol 815 ◽  
pp. 193-197 ◽  
Author(s):  
Abdul Mutalib Leman ◽  
Dafit Feriyanto ◽  
M.N.M. Salleh ◽  
Ishak Baba
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
High Temperature ◽  
Raw Material ◽  
Ultrasonic Technique ◽  
Material Combination ◽  
X Ray ◽  
Combination Technique ◽  
Eds Analysis ◽  
Thermal Stability Of

Metallic Fe80Cr20 alloy in thermal stability analysis is investigated. Approached method is combination technique (milled and UT) of ball milling (milled) combined with ultrasonic technique (UT) which is not yet fully explored. From Energy Dispersive x-ray Spectroscopy (EDS) analysis resulted that the composition of 80 wt% Fe and 20 wt% Cr in individual particle was achieved at milled and UB 4.5 h sample. Higher thermal stability of treated samples approximately 63% at 1100 °C temperature operation which showed by milled and UT at 4.5 h when compared to raw material. Combination technique shown high prospect to advance exploration in improving thermal stability which suitable for interconnect application.

Experimental study on heat pipe thermoelectric generator for industrial high temperature waste heat recovery

2020 ◽  
Vol 175 ◽  
pp. 115299 ◽  
Author(s):  
Chenglong Wang ◽  
Simiao Tang ◽  
Xiao Liu ◽  
G.H. Su ◽  
Wenxi Tian ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Heat Pipe ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Thermoelectric Generator ◽  
Waste Heat

Effect of excess MgO on microstructure and thermal properties of cordierite ceramics for high-temperature thermal storage

2019 ◽  
Vol 45 (17) ◽  
pp. 22264-22272 ◽  
Author(s):  
Xinbin Lao ◽  
Xiaoyang Xu ◽  
Weihui Jiang ◽  
Jian Liang ◽  
Jianfeng Liu
Keyword(s):  
Thermal Properties ◽  
High Temperature ◽  
Thermal Storage ◽  
Cordierite Ceramics

scholarly journals Application of Borehole Thermal Energy Storage in Waste Heat Recovery from Diesel Generators in Remote Cold Climate Locations

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 656 ◽  
Author(s):  
Seyed Ghoreishi-Madiseh ◽  
Ali Fahrettin Kuyuk ◽  
Marco Rodrigues de Brito ◽  
Durjoy Baidya ◽  
Zahra Torabigoodarzi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Storage System ◽  
Thermal Storage ◽  
Cold Climate ◽  
Diesel Generators

Remote communities that have limited or no access to the power grid commonly employ diesel generators for communal electricity provision. Nearly 65% of the overall thermal energy input of diesel generators is wasted through exhaust and other mechanical components such as water-jackets, intercoolers, aftercoolers, and friction. If recovered, this waste heat could help address the energy demands of such communities. A viable solution would be to recover this heat and use it for direct heating applications, as conversion to mechanical power comes with significant efficiency losses. Despite a few examples of waste heat recovery from water-jackets during winter, this valuable thermal energy is often discarded into the atmosphere during the summer season. However, seasonal thermal energy storage techniques can mitigate this issue with reliable performance. Storing the recovered heat from diesel generators during low heat demand periods and reusing it when the demand peaks can be a promising alternative. At this point, seasonal thermal storage in shallow geothermal reserves can be an economically feasible method. This paper proposes the novel concept of coupling the heat recovery unit of diesel generators to a borehole seasonal thermal storage system to store discarded heat during summer and provide upgraded heat when required during the winter season on a cold, remote Canadian community. The performance of the proposed ground-coupled thermal storage system is investigated by developing a Computational Fluid Dynamics and Heat Transfer model.

scholarly journals Encapsulated High Temperature PCM as Active Filler Material in a Thermocline-based Thermal Storage System

2015 ◽  
Vol 69 ◽  
pp. 937-946 ◽  
Author(s):  
B. Muñoz-Sánchez ◽  
I. Iparraguirre-Torres ◽  
V. Madina-Arrese ◽  
U. Izagirre-Etxeberria ◽  
A. Unzurrunzaga-Iturbe ◽  
...  
Keyword(s):  
High Temperature ◽  
Storage System ◽  
Thermal Storage ◽  
Filler Material ◽  
Active Filler
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