基于建筑侧供热效果的换热站调控策略研究
Research on control strategy of heat exchange stations based on building side heating effect
摘要：
为满足用户的热舒适需求,减少能源浪费,实现按需供热,针对现有换热站调控方式未能有效根据室内供热效果进行调节的问题,提出了一种优化调控方式——基于室温反馈控制换热站的优化调控。采用TRNSYS软件建立了动态仿真控制模型,结合末端用户的实际供热效果,对温度、流量等参数进行实时监测和反馈,并验证模型的有效性。对比换热站优化调控与传统调控方式,结果显示,模拟温度与实测温度偏差最大为1.57 ℃,模型合理。采用优化调控方式时,平均室温为21 ℃,平均波幅为9%;采用传统调控方式时,平均室温为19 ℃,平均波幅为36%。优化调控方式能够显著减少室温波动,使其保持在20～22 ℃范围内,平均波幅从36%降低至9%,提高了系统稳定性,且控制逻辑修改简单,易于实现。
Abstract：
To meet users’ thermal comfort needs, reduce energy waste, and achieve on-demand heating, aiming at the problem that the existing control methods of heat exchange stations cannot effectively adjust according to the indoor heating effect, this paper proposes an optimized control method—optimized control of heat exchange stations based on room temperature feedback control. The TRNSYS software is used to establish a dynamic simulation control model, and combined with the actual heating effect of end-users, the parameters such as temperature and flow rate are monitored and fed back in real-time,and the effectiveness of the model is verified. By comparing the optimized control method with the traditional control method of heat exchange stations, the results show that the maximum error between the simulated temperature and the measured temperature is 1.57 ℃, indicating that the model is reasonable. When the optimized control method is adopted, the average room temperature is 21 ℃ and the average fluctuation amplitude is 9%. When the traditional control method is used, the average room temperature is 19 ℃ and the average fluctuation amplitude is 36%. The optimized control method can significantly reduce room temperature fluctuations, keeping it within the range of 20-22 ℃, and the average fluctuation amplitude is reduced from 36% to 9%, which improves the system stability, and the modification of the control logic is simple and easy to implement.
Keywords:heating; TRNSYS simulation; heat exchange station; room temperature feedback control; control strategy