提高室内温度标准对供暖能耗的影响
Impact of increasing indoor temperature standard on heating energy consumption
摘要：
为了分析供暖室内温度标准从18 ℃提高到20 ℃对二次网热水供暖系统能耗的影响,根据水力平衡状态和调节方式的不同设计了6种计算情景,建立了水力平衡与水力失调情况下分别提高供水温度与增加流量时的热水供暖系统总供热量与耗电量的计算模型。通过文献调研统计了用户水力失调度的正态分布特征,对案例系统进行了多工况的能耗分析。结果表明:水力平衡时,提升流量导致耗电量增加219.9%;水力失调时,提升流量的情景总供热量增加率比提高供水温度小1.1%,耗电量增加率大539.9%;情景D*、T*、G*的总供热量分别随水力失调度标准差以斜率0.35、0.38、0.27线性增大。
Abstract：
In order to analyse the impact of increasing the heating indoor temperature standard from 18 to 20 ℃ on the energy consumption of the secondary network hot water heating system, this paper designs six calculation scenarios according to the different hydraulic balance states and adjustment methods, and establishes a calculation model for the total heat supply and electricity consumption of the hot water heating system when the water supply temperature and the flow rate are increased respectively under conditions of hydraulic balance and hydraulic imbalance. Through the literature investigation, the normal distribution characteristics of users’ hydraulic imbalance degree are analysed, and the energy consumption of the case system under multiple operating conditions is analysed. The results show that under the hydraulic balance condition, increasing the flow rate leads to a significant increase in electricity consumption by 219.9%. Under the hydraulic imbalance condition, the scenarios with increasing the flow rate result in slightly less increase rate of total heat supply (1.1%) compared to that increasing the supply water temperature, but with a much higher increase in the increase rate of electricity consumption (539.9%). Under the hydraulic imbalance condition, the total heat supply of scenarios D*, T*, G*increases linearly with the standard deviation of hydraulic imbalance degree at a slope of 0.35, 0.38, 0.27, respectively.
Keywords:heating system; indoor design temperature; heat supply; electricity consumption; water supply temperature; flow rate; hydraulic imbalance