Impact of increasing indoor temperature standard on heating energy consumption

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.