分布式能源热网储能量化计算分析

Calculation and Analysis of Energy Storage in Heat Supply Nets of Distributed Energy

研究分布式能源供热系统中热网储能特性是制定能源高效利用控制策略的必要前提。该文通过对分布式能源热网储能特性的研究,建立热网储能量化计算模型。该模型描述热网储能特性的重要参数-储能供能持续时间。引入影响因子θ对模型进行改进,提高热网换热段温度与实际工况的吻合度。针对3个换热站的试验数据,对改进后模型进行滞后时间计算,从而验证其正确性。通过对实际案例的计算,得到并分析热网储能供能的持续时间,得出循环水泵存在最佳流量的结论。此外,应用上述模型对分时分段供暖工况进行分析计算,得出24h内与室外温度正相关的热网供水温度随时间的分布。

Studying the energy storage characteristics of the heating network in a distributed energy heating system is necessary for formulating a control strategy for efficient energy utilization. In this paper, based on the study of the energy storage effect of distributed energy heat networks, a calculation model for energy storage of heat networks was established. This model describes an important parameter of heat storage energy storage characteristics: the duration of energy storage. The model was improved by introducing the influence factor θ to make the temperature of the heat exchange section of the heating network more consistent with the actual situation. According to the test data of three heat exchange stations, the lag time of the proposed model was calculated to verify the correctness of the model. By calculating the actual case, the duration of energy supply in the heat network was obtained and analyzed, and it was concluded that there is an optimal flow rate for the circulating water pump. In addition, the time-division heating mode was analyzed and calculated, and the distribution of the heating network water supply temperature with time that was positively correlated with the outdoor temperature within 24 hours.