Study on the influence of rice straw ash cement mortar finish on the temperature pattern of sunning water pool in cold regions

To investigate the warming effect of rice straw ash (RSA) cement mortar facing on sunning water pools, this study focuses on a sunning water pool with a 5% substitution rate of RSA in its cement mortar facing. A temperature control test was conducted to compare it with a conventional cement mortar-faced sunning water pool. Additionally, finite element software was employed to create models for both the RSA and conventional cement mortar-faced sunning water pools, facilitating an analysis of the variations in water temperature within these systems.The results indicate that the RSA cement mortar facing can enhance the daily average water temperature of the sunning water pools by 0.1°C to 0.6°C compared to those featuring conventional cement mortar facing. Simulation data reveal that the water temperature in the sunning water pool utilizing RSA cement mortar facing is approximately 0.46°C higher than that observed in its counterpart with standard cement mortar facing. The trends identified through theoretical calculations, experimental data, and simulation results are largely consistent, suggesting that RSA cement mortar facing effectively improves the thermal performance of sunning water pools.These findings provide valuable theoretical support for implementing RSA cement mortar in agricultural facilities. • This study can improve rice straw recycling and reduce energy consumption. • The surface composed of rice straw ash cement mortar displays reduced RGB values and exhibits enhanced capabilities for heat storage and insulation. • Enhancing the surface heat transfer of sunning water pools can significantly elevate the temperature of the irrigation water. • Experimental results and finite element simulations demonstrate that the rice straw ash cement mortar-faced sunning water pool exhibits superior thermal performance.