Talk · International Conference on Nuclear and Renewable Energy Resources · October 23, 2026
Modular Dual-Circuit Indirect Heating Solar Thermal Installation with Flat Collectors, Plate Heat Exchanger, and Battery Tank
Murat Kunelbayev, Gulnur Tyulepberdinova, Gulshat A. Amirkhanova
Abstract
This paper presents a modular dual-circuit solar thermal system featuring flat-plate collectors (2–10 m2) and a plate heat exchanger. The study evaluates system performance using a water–glycol coolant under differential and VFD control (maintaining ΔTset = 10 °C). Comparative analysis shows that switching to VFD control increases annual thermal output from 7.6 to 7.8 MWh and improves average collector efficiency to 0.42. Simultaneously, pump energy consumption drops from 160 to 110 kWh/year, while the number of start-ups is nearly halved. The results confirm that VFD control enhances energy efficiency and extends equipment life under variable solar radiation conditions.
More by Murat Kunelbayev
- Improving the Energy Efficiency of Photovoltaic-Powered Drip Irrigation: Analysis of Pressure LossesInternational Conference on Nuclear and Renewable Energy Resources · 2026
- Optimization of the Electrical and Thermal Characteristics of a Hybrid PV/T System Based on CuO–ZnO NanofluidInternational Conference on Nuclear and Renewable Energy Resources · 2026
- An Intelligent Control System for a Dual-Loop Solar Installation with Thermosiphon Circulation Based on Artificial Intelligence MethodsInternational Conference on Nuclear and Renewable Energy Resources · 2026
- Adaptive Maximum Power Point Tracking and High-Frequency Sinusoidal Pulse Width Modulation Single-Phase Inverter for Standalone Photovoltaic SystemsInternational Conference on Nuclear and Renewable Energy Resources · 2026