Effect of Entrance Insulated Inner Absorber on EGATC Thermal Performance – Experimental Approach

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Article
Published: Sep 15, 2025
DOI: https://doi.org/10.33093/jetap.2025.7.2.16
Keywords:
Evacuated tube solar collector, Solar thermal, Thermal performance, Aerogel, Insulation paint

Main Article Content

Nabila Sulaiman
Department of Mechanical Engineering, Kulliyyah of Engineering, International Islamic University Malaysia (IIUM), Gombak, 53100 Kuala Lumpur, Malaysia.
Sany Izan Ihsan
Department of Mechanical Engineering, Kulliyyah of Engineering, International Islamic University Malaysia (IIUM), Gombak, 53100 Kuala Lumpur, Malaysia.
Zafri Azran Abdul Majid
Department of Audiology and Speech-Language Pathology, Kulliyyah of Allied Health Science, International Islamic University Malaysia (IIUM), 25200 Kuantan, Pahang, Malaysia.
Syed Noh Syed Abu Bakar
Department of Mechanical Engineering, Kulliyyah of Engineering, International Islamic University Malaysia (IIUM), Gombak, 53100 Kuala Lumpur, Malaysia.

Abstract

This study presented the experimental results of using insulated inner absorbers to enhance the thermal performance of the Evacuated Glass Thermal-Absorber Tube Collector (EGATC). The inner absorber of EGATC was insulated with exterior thermal insulation paint. The length of the insulation varied at 20 cm, 30 cm, 40 cm, and 50 cm from the tip of the inner absorber. The thermal performance of the EGATC improved when the insulated inner absorber was utilized compared to instances without insulation. The optimal insulation length for enhancing EGATC’s thermal performance was found to be 35 cm from the projection. A follow-up experiment used the 35 cm insulation length to observe its thermal performance patterns. The 30 cm and 35 cm insulation lengths exhibited similar outlet temperatures during charging, confirming that 35 cm was the optimal length for insulating the inner absorber.

Article Details

How to Cite
[1]
Nabila Sulaiman, Sany Izan Ihsan, Zafri Azran Abdul Majid, and Syed Noh Syed Abu Bakar, “Effect of Entrance Insulated Inner Absorber on EGATC Thermal Performance – Experimental Approach”, Journal of Engineering Technology and Applied Physics, vol. 7, no. 2, pp. 121–127, Sep. 2025.
Issue
Vol. 7 No. 2 (2025): https://doi.org/10.33093/jetap.2025.7.2
Section
Regular Paper for Journal of Engineering Technology and Applied Physics
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

References

K. R. Kumar, N. V. V. K. Chaitanya and N. S. Kumar, “Solar Thermal Energy Technologies and Its Applications for Process Heating and Power Generation – A Review,” J. Clean. Prod., vol. 282, pp. 125296, 2021.

“Tracking SDG7: The Energy Progress Report 2022,” IEA, Paris, 2022.

[Available online] https://www.iea.org/reports/tracking-sdg7-the-energy-progress-report-2022.

A. Yadav and V. K. Bajpai, “An Experimental Study on Evacuated Tube Solar Collector for Heating of Air in India,” World Acad. Sci. Eng. Technol., vol. 79, no. 7, pp. 81–86, 2011.

N. Sulaiman, S. I. Ihsan, S. N. S. Abu Bakar, Z. A. Abdul Majid and Z. A. Zakaria, “Evacuated Tube Solar Air Collectors: A Review of Design Configurations, Simulation Works And Applications,” Prog. Ener. Environ., vol. 25, pp. 10-32, 2023.

A. Elbrashy, F. Aboutaleb, M. El-Fakharany and F. A. Essa, “Experimental Study of Solar Air Heater Performance with Evacuated Tubes Connected in Series and Involving Nano-Copper Oxide/Paraffin Wax as Thermal Storage Enhancer,” Environ. Sci. Pollut. Res., vol. 30, pp. 4603–4616, 2022.

R. Chaudhary and A. Yadav, “Experimental Investigation of Solar Cooking System Based on Evacuated Tube Solar Collector for The Preparation of Concentrated Sugarcane Juice Used in Jaggery Making,” Environ. Dev. Sustain., vol. 23, pp. 647–663, 2021.

Z. A. Zakaria et al., “Investigation on The Thermal Performance of Evacuated Glass-Thermal Absorber Tube Collector ( EGATC ) for Air Heating Application,” vol. 2, no. 2, pp. 48–64, 2021.

A. V. Kumar, T. V. Arjunan, D. Seenivasan, R. Venkatramanan and S. Vijayan, “Thermal Performance of An Evacuated Tube Solar Collector with Inserted Baffles for Air Heating Applications,” Sol. Ener., vol. 215, no. September 2020, pp. 131–143, 2021.

Z. Wang, Y. Diao, Y. Zhao, C. Chen, L. Liang and T. Wang, “Thermal Performance of Integrated Collector Storage Solar Air Heater with Evacuated Tube and Lap Joint-Type Flat Micro-Heat Pipe Arrays,” Appl. Ener., vol. 261, no. December 2019, pp. 114466, 2020.

I. Singh and S. Vardhan, “Experimental Investigation of An Evacuated Tube Collector Solar Air Heater with Helical Inserts,” Renew. Ener., vol. 163, pp. 1963–1972, 2021.

C. Dutta, D. K. Yadav, V. K. Arora and S. Malakar, “Drying Characteristics and Quality Analysis of Pre-Treated Turmeric (Curcuma Longa) using Evacuated Tube Solar Dryer with and without Thermal Energy Storage,” Sol. Ener., vol. 251, pp. 392–403, 2023.

A. V. Kumar, T. V Arjunan, D. Seenivasan, R. Venkatramanan, S. Vijayan and M. Matheswaran, “Influence of Twisted Tape Inserts on Energy and Exergy Performance of An Evacuated Tube-Based Solar Air Collector,” Sol. Ener., vol. 225, no. April, pp. 892–904, 2021.

M. Abrofarakh and H. Moghadam, “Investigation of Thermal Performance and Entropy Generation Rate of Evacuated Tube Collector Solar Air Heater with Inserted Baffles and Metal Foam: A CFD Approach,” Renew. Ener., vol. 223, no. October 2023, pp. 120022, 2024.

A. Kushwah, A. Kumar, A. Pal and M. Kumar Gaur, “Experimental Analysis and Thermal Performance of Evacuated Tube Solar Collector Assisted Solar Dryer,” Mater. Today Proc., vol. 47, pp. 5846–5851, 2021.

D. K. Yadav, P. Dhurve and V. K. Arora, “Mathematical Modeling and Drying Characteristics of Thin Layer Drying of Bitter Gourd in Evacuated Tube Solar Dryer-Without Heat Pipe,” J. Phys. Conf. Ser., vol. 2312, no. 1, 2022.

G. Madhulatha, M. M. J. Kumar and P. Sateesh, “Optimization of Tube Arrangement and Phase Change Material for Enhanced Performance of Solar Air Heater - A Numerical Analysis,” J. Ener. Stor., vol. 41, no. May, pp. 102876, 2021.

S. Abo-Elfadl, H. Hassan and M. F. El-Dosoky, “Study of The Performance of Double Pass Solar Air Heater of A New Designed Absorber: An Experimental Work,” Sol. Ener., vol. 198, no. January, pp. 479–489, 2020.

S. Y. Ahn and K. Y. Kim, “Thermal Performance of T-shaped Obstacles in A Solar Air Heater,” 2020. [Available online] https://www.scribd.com/doc/265667918/Air-Heater.

A. Saxena, N. Agarwal and E. Cuce, “Thermal Performance Evaluation of A Solar Air Heater Integrated with Helical Tubes Carrying Phase Change Material,” J. Ener. Stor., vol. 30, no. January, pp. 101406, 2020.

S. Abo-elfadl, M. F. El-dosoky and H. Hassan, “Energy and Exergy Assessment of New Designed Solar Air Heater of V-Shaped Transverse Finned Absorber at Single- and Double-Pass Flow Conditions,” Environ. Sci. Pollut. Res., vol. 28, pp. 69074–69092, 2021.

A. R. Kalash, S. S. Shijer and L. J. Habeeb, “Thermal Performance Improvement of Double Pass Solar Air Heater,” Mech. Eng. Res. Dev., vol. 43, no. 5, pp. 355-372, 2020.

B. Madhu, A. E. Kabeel, R. Sathyamurthy and S. W. Sharshir, “Investigation on Heat Transfer Enhancement of Conventional and Staggered Fin Solar Air Heater Coated with CNT-Black Paint — An Experimental Approach,” Environ. Sci. Pollut. Res., vol. 27, pp. 32251–32269, 2020.

A. V. Fedyukhin et al., “Aerogel Product Applications for High-Temperature Thermal Insulation,” Energies, vol. 15, no. 20, pp.7792, 2022.

A. Berge and P. Ä. R. Johansson, “Literature Review of High Performance Thermal Insulation,” Rep. in Build. Phys., Chalmers University of Technology, 2012.

S. Golder, R. Narayanan, R. Hossain and M. R. Islam, “Experimental and CFD Investigation on The Application for Aerogel Insulation in Buildings,” Energies, vol. 14, no. 11, pp. 3310, 2021.

D. H. Mutlu and A. Neslihan, “Thermal Insulation Materials in Architecture: A Comparative Test Study with Aerogel and Rock Wool,” Environ. Sci. Pollut. Res., vol. 29, pp. 72979–72990, 2022.

A. W. Bashir and B. C. C. Leite, “Performance of Aerogel as A Thermal Insulation Material Towards A Sustainable Design of Residential Buildings for Tropical Climates in Nigeria,” Ener. Built Environ., vol. 3, no. 3, pp. 291–315, 2022.

R. Baetens, B. P. Jelle and A. Gustavsen, “Aerogel Insulation for Building Applications: A State-of-The-Art Review,” Ener. Build., vol. 43, no. 4, pp. 761–769, 2011.

S. K. Adhikary, D. K. Ashish and Ž. Rudžionis, “Aerogel Based Thermal Insulating Cementitious Composites: A Review,” Ener. Build., vol. 245, pp. 111058, 2021.

Y. Tan, W. Chen, Y. Fang, M. Cheng and S. Wang, “Investigation of Novel Expandable Polystyrene/Alumina Aerogel Composite Thermal Insulation Material,” Energy, vol. 284, pp. 129238, 2023.

Y. H. Wang et al., “Industrial Application of SiO2 Aerogel Prepared by Supercritical Ethanol (SCE) Drying Technique as Cold and Heat Insulation Materials,” J. Sol-Gel Sci. Technol., vol. 106, pp. 341–348, 2022.

Y. Qiu, Y. Zhang, Q. Li, Y. Xu and Z. X. Wen, “A Novel Parabolic Trough Receiver Enhanced by Integrating A Transparent Aerogel and Wing-Like Mirrors,” Appl. Ener., vol. 279, pp. 115810, 2020.

D. Gao, L. Wu, Y. Hao and G. Pei, “Ultrahigh-efficiency Solar Energy Harvesting via A Non-Concentrating Evacuated Aerogel Flat-Plate Solar Collector,” Renew. Ener., vol. 196, pp. 1455–1468, 2022.

Z. A. Zakaria et al., “Mathematical Model Development of Evacuated Glass-Thermal Absorber Tube Collector ( EGATC ) for Air Heating Application,” vol. 11, no. 1, pp. 73–82, 2023.

B. Ultrashield, “Bina Integrated Industries Sdn Bhd (BIISB),” 2022. [Available online]

https://www.binapaint.com.my/product/

A. T. A. Rahim et al., “Effect of Different Aerogel Percentage Coating on Thermal Insulating Performance,” vol. 28, no. 1, pp. 155–162, 2024.

E. Vengadesan and R. Senthil, “A Review on Recent Developments in Thermal Performance Enhancement Methods of Flat Plate Solar Air Collector,” Renew. Sustain. Ener. Rev., vol. 134, no. November 2019, pp. 110315, 2020.