Research On Thermal Environment And Energy Consumption Of Industrial Workshop Based On BES-CFD Co-simulation

With the rapid development of industry,China’s industrial energy consumption is increasing,which accounts for 70% of the country’s total energy consumption.Among them,industrial building energy consumption accounts for 10% of industrial energy consumption and has a rapid upward trend,which has become an important factor restricting the further development of Chinese industry.Energy problems are getting worse in our country,carrying out energy-saving reform of industrial buildings and vigorously developing green industrial buildings is an effective way to achieve sustainable development of industry.Building performance simulation software is an important tool for green building design and renovation,but the traditional simulation method using constant property and the basic assumption of lumped parameter can not accurately simulate the building performance of industrial buildings with thermal stratification.Therefore,it is very important to study the methods of simulating industrial buildings performance and promote the rapid development of green industrial buildings.In this paper,a large machining workshop was taken as the research object and BES-CFD co-simulation was used to study the indoor thermal environment and building energy consumption of the building.What’s more,the effectiveness of the method was verified by experimental data.At the same time,we analyzed the influence factors of energy consumption and proposed a series of schemes of energy-saving reform.The main research contents are as follows:(1)In this paper,we introduce the BES-CFD co-simulation in detail firstly,and then propose that study the performance of industrial buildings by using BES-CFD co-simulation.(2)The indoor thermal environment of workshop was measured by the super thermodetector and ultrasonic anemometer.The measurement results indicate that the temperature is evenly distributed in the horizontal plane,but there is a thermal stratification phenomenon in the vertical plane and the maximum temperature difference is 5.5℃.In addition,the flow field is evenly distributed throughout thewhole building space.The energy consumption of workshop was measured by the energy regulatory platform.The measurement results indicate that there are four major energy consumption systems in the workshop,which are lighting,ventilation,air conditioning and electrical equipment,and the average value of total energy consumption is 51094.75kW?h,so the workshop belongs to high energy consuming industrial buildings.(3)The BES-CFD co-simulation was used to simulate the indoor thermal environment and building energy consumption of the workshop.The simulation results of indoor temperature field are basically consistent with the experimental data.But because of airflow disturbance,the simulation results of flow field is slightly different from the experimental data and we found a little turbulence in the room.The simulation results of energy simulation indicate that the error between the simulation results and the experimental results is small.Among them,the total energy consumption value obtained by simulation is 47023.49 kW ? h and the error is only7.97%.(4)We analyzed the influence factors of energy consumption and proposed a series of schemes of energy-saving reform.First,the optimal window-wall ratio is 0.3.Second,the wall insulation needs to be increased by 20 mm.Third,The lighting system lamps need to be replaced with energy-saving lamps.Finally,we think the best interior design temperature for air conditioning systems is 26℃.Beyond that,we can not only change the CAV to VAV,but also equip with full heat recovery device in the system.When we use these measures together,the energy saving rate can reach8.81%.