This is an unedited manuscript accepted for publication and provided as an Article in Press for early access at the author’s request. The article will undergo copyediting, typesetting, and galley proof review before final publication. Please be aware that errors may be identified during production that could affect the content. All legal disclaimers of the journal apply.
Amit Shravan Thombare,
P. D. Daunde,
- Student, Department of Electrical Engineering, Sanjivani College of Engineering, Kopargaon, Maharashtra, India
- Assistant Professor, Department of Electrical Engineering, Sanjivani College of Engineering, Kopargaon, Maharashtra, India
Abstract
This paper focus on the substantial effects of fluid property changes and phase change events, this study provides a comprehensive transient assessment of the heat exchanger’s thermal performance and fluid flow behaviour for cooling and dehumidification applications. In response to a step-change perturbation, a dynamic model was created and co-simulated to describe the moist air (shell-side) and the two-phase refrigerant (tube-side), as well as their non-linear interactions. The significant correlation between fluid state and heat exchanger efficiency is evident from the presentation of the transient data as a set of key performance indicators. First, Due to the high NTU and the dominating two-phase Mixture Zone, the heat exchanger produces a modest effectiveness (ϵ≈0.8). When a second step shift occurs at t≈10×10²3s, a significant transient event is precipitated, and the average vapour zone length fraction increases along with the depth-layered liquid zone. The system’s reference state of a more vigorous dehumidification mode is further established by this transition, which results in a lower total NTU and an instantaneous rapid increase in the Rate of Water Condensation. The findings emphasise the significance of forecasting the instantaneous ϵ, which is primarily influenced by the refrigerant flow’s transient distribution (Vapour, Mixture, Liquid) across three zones. For the better cooling capacity and stability when operating with transient loads, these results highlight the need for a variable-property, multi-zone transient model in the design and control of small microtube heat exchangers.
Keywords: Multi-Motor Drive Systems, Voltage Source Inverter (VSI), Overcurrent Elimination, Current Ripple Reduction, High-Performance Drives, Industrial Automation.
[This article belongs to Journal of Thermal Engineering and Applications ]
References
- Aziz MA, Talib MA, Arumugam R. Diagnosis of On-Load Tap Changer (OLTC) using dynamic resistance measurement. In2014 IEEE 8th international power engineering and optimization conference (PEOCO2014) 2014 Mar 24 (pp. 494-497). IEEE.
- Boricic A, Laban D, Moedim B, Lopez AC, Molinari B, Riaz Z, Nikjoo R. Dynamic resistance measurements and result interpretation for various on-load tap changers. In2019 IEEE Milan PowerTech 2019 Jun 23 (pp. 1-6). IEEE.
- Jacobs IS. Fine particles, thin films and exchange anisotropy. Magnetism. 1963:271-350.
- Yorozu TA, Hirano M, Oka K, Tagawa Y. Electron spectroscopy studies on magneto- optical media and plastic substrate interface. IEEE translation journal on magnetics in Japan. 1987 Aug 31;2(8):740-1.
- Huiyong Z, Junming L, Hongqi L. Numerical simulations of a micro-channel wall-tube condenser for domestic refrigerators. Tsinghua Science and Technology. 2010 Aug;15(4):426-33.
- Shtym A, Zhurmilova I. Ground heat exchangers of geothermal heat pumps and analysis of their constructive features and types. In2017 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM) 2017 May 16 (pp. 1-4). IEEE.
- Chitale J, Abdoli A, Dulikravich GS, Sabau AS, Black JB. Conjugate heat transfer analysis of the supercritical CO2 based counter flow compact 3D heat exchangers. In2020 19th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm) 2020 Jul 21 (pp. 23-29). IEEE.
- Zhai JH, Sun BB. Fracture Analysis of Stress Corrosion Cracking in Heat Exchanger Tubes. In2021 3rd International Conference on Intelligent Control, Measurement and Signal Processing and Intelligent Oil Field (ICMSP) 2021 Jul 23 (pp. 263-266). IEEE.
- Zubkov NN. Innovation method in enhancing the internal surface of a heat exchange tube. In2025 7th international youth conference on radio electronics, electrical and power engineering (REEPE) 2025 Apr 8 (pp. 01-05). IEEE.
- Joshi SS, Katkar DS, Agrawal SK. Effective Utilization of Existing Solar System. In2024 7th International Conference on Circuit Power and Computing Technologies (ICCPCT) 2024 Aug 8 (Vol. 1, pp. 1816-1821). IEEE.
- Navle IA, Rokade MR, Pardeshi DB, Kadam B. Smart Dust Removal System for Solar Panel by using Programmable Logic Controller. In2024 8th International Conference on Inventive Systems and Control (ICISC) 2024 Jul 29 (pp. 642-645). IEEE.
- Shaikh MB, Patil PJ, Thokal PV, Pardeshi DB. Implementing machine learning for predictive maintenance in industrial machinery. In2024 15th international conference on computing communication and networking technologies (ICCCNT) 2024 Jun 24 (pp. 1-6). IEEE.
Journal of Thermal Engineering and Applications
| Volume | 13 | |
| Issue | 02 | |
| Received | 26/06/2026 | |
| Accepted | 13/08/2026 | |
| Published | 01/09/2026 | |
| Publication Time | 67 Days |