Study On The Application Of Energy-saving Modulation Mode For Thermal Heating Of Dormitory In Colleges And Universities In Severe Cold Area

University dormitory building has various characteristics,including large volume,personnel-intensive,holiday "empty nest",the use of regular heat metering energy-saving potential.According to the characteristics of heating time,outdoor temperature and the characteristics of residential dormitory heating in Xinjiang,the whole heating period is divided into four climatic stages: the early cold period,the cold period,the duty period and the end of the cold period,Central heating system under the condition of metering and heating facilities: fixed mode,flow adjustment mode and time-sharing adjustment mode.Using the Design Builder energy consumption simulation software to analyze the indoor temperature change and energy consumption of the dormitory building with different adjustment methods as the variables,the optimal simulation and adjustment scheme of the dormitory heat metering heating is obtained,and the university is located in the cold area of Xinjiang.This paper analyzes the data of the thermo-inlet temperature,the flow rate and the indoor temperature of the typical dormitory in real-time monitoring of the heating project according to the simulated optimal adjustment scheme of the simulated heating.The results and the measured results are compared and analyzed,and the feasibility of the optimal adjustment scheme of heat metering heating is demonstrated.Simulation results show that: Heat metering heating dormitory in the early cold season using the flow adjustment mode(valve opening degree of 70%),energy saving rate can reach 34.2%;In the cold season,the time-sharing mode can be used to meet the requirements of indoor temperature and comfort during heating.During the heating period,the heating temperature is 3 ?~5 ? and the energy saving rate is35.32%.When the flow adjustment mode(valve opening degree of 20%)is used in the duty period,it can meet the requirement of the minimum temperature of 10 ? in the room,and the heating rate is up to57.52%.The end of the cold flow mode(valve opening degree of 60%)heating room temperature is more stable,basically meet the interior design temperature of 20 ? heating requirements,energy saving rate of31.97%;The cold and cold water temperature in accordance with 50 ? operation,indoor temperature and comfort have reached the design requirements.The test results show that: The indoor temperature of the test room is basically the same throughout the day,in the use of flow adjustment mode heating,the dormitory temperature stability is good,and can guarantee the indoor comfort requirements;The use of time-sharing mode of heating,the dormitory indoor temperature fluctuations,the maximum daily temperature of 4.59 ?.Simulation and experimental comparison results show that: The typical dormitory in the measured and simulated flow regulation mode and time-sharing adjustment mode room temperature fluctuation trend is basically the same,the simulation and the measured error is due to simulated conditions ignored the heating equipment,heat storage and building thermal inertia Factors,resulting in simulated conditions under the indoor temperature change rate is greater.During the heating period,it is possible to meet the requirements of the indoor temperature and comfort of the dormitory.The optimal adjustment scheme of the heat-saving and energy-saving regulation mode of the dormitory in the cold area is: the flow adjustment mode(70% of the valve opening degree)Using the time-sharing adjustment mode,the duty cycle using flow adjustment mode(valve opening degree of 20%),the end of the cold flow control mode(valve opening degree of 60%)heating.