scholarly journals Energy and Environmental Analysis of a Solar Evacuated Tube Heat Pipe Integrated Thermoelectric Generator Using IoT

2022 ◽  
Author(s):  
SakthiPriya Manivannan ◽  
DivyaLaxmi Gunasekaran ◽  
Gowthami Jaganathan ◽  
Shanthi Natesan ◽  
SabariMuthu Muthusamy ◽  
...  
Keyword(s):  
Heat Pipe ◽  
Power Output ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Recovery Process ◽  
Sensor Data ◽  
Parabolic Trough ◽  
Environmental Aspect ◽  
Pipe System ◽  
Evacuated Tube

Abstract This paper investigates the solar evacuated tube heat pipe system (SEHP) coupled with a thermoelectric generator (TEG) using the internet of things (IoT). The TEGs convert heat energy into electricity through the Seebeck effect that finds application in the waste heat recovery process for the generation of power. The present work deals with the theoretical study on solar evacuated tube heat pipe integrated TEG and it is validated experimentally using with and without parabolic trough concentrating collector. And the carbon credit of the TEG system is determined to find its potential in the environmental aspect. Also, the boost type converter is used to raise the power output by increasing the voltage from the TEG for rural electrifications. However, it is found that the maximum power output due to the influence of the parabolic trough concentrator results in increased efficiency when compared with the non-concentrating SEHP-TEG system. The TEG output power can be boosted up to a maximum of 5.98 V using a power electronic boost converter. Besides, the recorded real sensor data with Arduino is implemented in the experimental process for automatic remote monitoring of the temperature.

Gravity-Assisted Heat Pipe With Strong Marangoni Fluid for Waste Heat Management of Single and Dual-Junction Solar Cells

2013 ◽  
Vol 135 (2) ◽  
Author(s):  
Kenneth M. Armijo ◽  
Van P. Carey
Keyword(s):  
Heat Flux ◽  
Solar Cells ◽  
Heat Pipe ◽  
Waste Heat ◽  
Working Fluid ◽  
Water Mixture ◽  
Heat Management ◽  
Strong Concentration ◽  
Electrical Efficiency ◽  
Pipe System

This study investigates the cooling of single and multijunction solar cells with an inclined, gravity-assisted heat pipe, containing a 0.05 M 2-propanol/water mixture that exhibits strong concentration Marangoni effects. Heat pipe solar collector system thermal behavior was investigated theoretically and semi-empirically through experimentation of varying input heat loads from attached strip-heaters to simulate waste heat generation of single-junction monocrystalline silicon (Si), and dual-junction GaInP/GaAs photovoltaic (PV) solar cells. Several liquid charge ratios were investigated to determine an optimal working fluid volume that reduces the evaporator superheat while enhancing the vaporization transport heat flux. Results showed that a 45% liquid charge, with a critical heat flux of 114.8 W/cm2, was capable of achieving the lowest superheat levels, with a system inclination of 37 deg. Solar cell semiconductor theory was used to evaluate the effects of increasing temperature and solar concentration on cell performance. Results showed that a combined PV/heat pipe system had a 1.7% higher electrical efficiency, with a concentration ratio 132 suns higher than the stand-alone system. The dual-junction system also exhibited enhanced performance at elevated system temperatures with a 2.1% greater electrical efficiency, at an operational concentration level 560 suns higher than a stand-alone system.

scholarly journals Performance Analysis of (Bi2Te3-PbTe) Hybrid Thermoelectric Generator

2016 ◽  
Vol 5 (1) ◽  
pp. 32
Author(s):  
Anitha Angeline A ◽  
Jayakumar J
Keyword(s):  
Power Output ◽  
Power Efficiency ◽  
Figure Of Merit ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Maximum Power ◽  
Superior Performance ◽  
Cold Side ◽  
Current Output ◽  
Maximum Power Output

The performance of (Bi<sub>2</sub>Te<sub>3</sub>-PbTe) hybrid thermoelectric generator (TEG)<strong> </strong>composed of n-type Bismuth Telluride and p-type Lead Telluride semiconductor materials is presented in this paper. <strong> </strong>The effect of different performance parameters such as output voltage, output current, output power, maximum power output, open circuit voltage, Seebeck co-efficient, electrical resistance, thermal conductance, figure of merit, efficiency, heat absorbed and heat removed based on maximum conversion and power efficiency have been theoretically analyzed by varying the hot side temperature of the hybrid thermoelectric generator up to 350<sup>o</sup>C and by varying the cold side temperature from 30<sup>o</sup>C to 150<sup>o</sup>C. The results showed that a maximum power output of 21.7 W has been obtained with the use of one hybrid thermoelectric module for a temperature difference of 320<sup>o</sup>C between the hot and cold side of the thermoelectric generator at matched load resistance. The figure of merit was found to be around 1.28 which makes its usage possible in the intermediate temperature (250<sup>o</sup>C to 350<sup>o</sup>C) applications such as heating of Biomass waste, heat from Biomass cook stoves or waste heat recovery etc. It is also observed that the hybrid thermoelectric generator offers superior performance over 250<sup>o</sup>C of the hot side temperature, compared to standard Bi<sub>2</sub>Te<sub>3 </sub>modules.

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

Design of Low-Cost Solar Parabolic Through Steam Sterilization

2021 ◽  
Vol 10 (1) ◽  
pp. 50-60
Author(s):  
N. K. Sharma ◽  
Ashok Kumar Mishra ◽  
P. Rajgopal
Keyword(s):  
Heat Pipe ◽  
Low Cost ◽  
Steam Sterilization ◽  
Parabolic Trough ◽  
Theoretical Concepts ◽  
Medical Instruments ◽  
Sterilization Process ◽  
Evacuated Tube ◽  
Sun Light

The objective of this study is to develop a low cost solar parabolic trough that can be used for steam sterilization of medical instruments in small clinics where electricity is scarce and expensive. On the basis of theoretical concepts of parabola and focus-balanced parabola, the assembly of ribs and reflector sheet with evacuated tube and heat pipe has been done. The parabolic trough has been mounted on a trolley so that it can be moved easily according to direction of sun light. The designed solar parabolic trough was integrated with pressure cooker under various setups and experiments were conducted to test whether sterilization is taking place or not. To validate sterilization process, tests were also conducted by placing the infected medical instruments. The solar parabolic trough developed was able to generate and maintain steam at 121 degrees Celsius at pressure 15 psig (101.3 kN/m2) for 15 minutes. The solar parabolic trough developed was effective in sterilizing the medical instruments.

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