Design and Implementation of a Hybrid PLC-ESP32 Control System for a Peltier-Based Chiller

DOI

10.2991/978-94-6463-926-1_40How to use a DOI?

Keywords

Automation; Chiller; ESP32; Modbus TCP/IP; Peltier; PLC

Abstract

The demand for compact, efficient, and refrigerant-free cooling systems for small-scale applications necessitates innovative automation solutions. This paper presents the design and validation of a Peltier-based water chiller automated by a novel hybrid control system. The novelty of this architecture lies in its synergistic integration of a robust Schneider Programmable Logic Controller (PLC) for primary process control with a flexible ESP32 microcontroller for distributed data acquisition, communicating via the industry-standard Modbus TCP/IP protocol. This approach provides a practical framework that leverages the reliability of industrial PLCs while using low-cost IoT hardware to handle sensor interfacing, thus avoiding expensive proprietary expansion modules. Experimental validation confirmed the system's robust performance, demonstrating high-fidelity data communication with a minimal ± 0.2 ℃ discrepancy and significant thermal efficacy, as four Peltier modules reduced 4 L of water from 22.4 ℃ to 12.9 ℃ in 90 min. The fully integrated system operated successfully in a closed-loop automatic mode. These results demonstrate that the hybrid PLC-ESP32 architecture offers a reliable, flexible, and potentially cost-effective pathway for small-scale thermal automation, proving its feasibility for laboratory, research, and small-enterprise settings.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Danang Widjajanto
AU  - Hatib Setiana
AU  - Muhammad Wildan Mahrusi
AU  - Farhan Hanif Ridwan
AU  - Arum Kusuma Wardhany
AU  - Murie Dwiyaniti
PY  - 2025
DA  - 2025/12/31
TI  - Design and Implementation of a Hybrid PLC-ESP32 Control System for a Peltier-Based Chiller
BT  - Proceedings of the International Conference on Applied Science and Technology on Engineering Science 2025 (iCAST-ES 2025)
PB  - Atlantis Press
SP  - 350
EP  - 357
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-926-1_40
DO  - 10.2991/978-94-6463-926-1_40
ID  - Widjajanto2025
ER  -