TY - EJOU AU - Songsree, Prasongsuk AU - Thongchaisuratkrul, Chaiyapon TI - Peltier Water Cooling System with Solar Energy and IoT Technology Demonstration Set T2 - Energy Engineering PY - 2025 VL - 122 IS - 11 SN - 1546-0118 AB - The purpose of this research is to design and develop a demonstration Set of a water cooling system using a Peltier with solar energy and technology, and IoT (Internet of Things), and test and measure the performance of the Peltier Plate Water Cooling System Demonstration Set under different environmental conditions. To be used as a model for clean energy systems and experimental learning materials. The prototype system consists of a 100-W solar panel, a 12 V 20 Ah battery, a Peltier plate, a DS18B20 sensor, and a NodeMCU microcontroller. The system performance is determined by analyzing the energy drawn from the water (Q) compared to the electrical energy supplied to the plate (Q2) and calculating the coefficient of performance (COP) value to evaluate the performance of the system, as well as testing the operation under different light conditions (morning, noon, evening) with real-time temperature data and control behavior recorded via IoT (Internet of Things). The results showed that the system can reduce the water temperature by an average of 4°C–7.5°C within 60–90 min, with an average COP (COEFFICIENT OF PERFORMANCE) in the range of 0.3–0.4 during unstable solar energy periods. The system can respond to commands via the Blynk application in under 2 s and can also operate continuously on battery backup power during low-light hours. KW - Plate tier; solar energy; cooling system; efficiency technology; IoT (Internet of Things) DO - 10.32604/ee.2025.068448