Thermal storage system optimization toward the economic viability of heating systems in Yanqing Winter Olympics Village
To enhance the operational economy of heating systems in winter sports venues after the Olympics,a physical-mathematical model of the thermal storage device from the venue's heating system's was constructed.Numerical simulation methods were employed to study the thermal storage device.The simulated results of temperature stratification within the thermal storage device were compared and analyzed against field-measured data,validating the accuracy of the model.The structure and temperature scheme of the thermal storage device were optimized by leveraging the local peak-valley electricity price system,aiming to optimize the operating costs of electrode boilers,with constraints the cavitation margin of the heat release pump and the total power of the electrode boiler.The influence of the thermal storage device's manifold distributor structure and thermal storage media temperature on the energy conservation and the economic viability of the heating system were investigated.Results indicate that the designed diffuser-type manifold distributor structure outperforms the manifold distributor structure in the Yanqing Winter Olympics Village's thermal storage device,as it exhibits superior temperature stratification within the thermal storage device during operation.This results in lower mixing of the thermal storage media at different temperatures within the device,which,in turn,lead to higher outlet temperatures and further improvement of the room comfort.The heating efficiency improved from 82.02%to 85.98%after optimization.During the period from winter solstice to New Year's day,the optimal temperature of the thermal storage media was 95℃,leading to a reduction in the operational costs of the electrode boiler heating system by up to 14.13%.This work highlights the value of engineering applications and provides guidance for post-Olympic venue operations and operational improvements in thermal storage heating systems.
国家科技期刊平台
NSTL
万方数据
