Design And Research Of Reconfigurable And Accurate Temperature Control Airflow Organization Test Platform

The airflow organization test platform with reconfigurable precise temperature control can provide a reliable guarantee for the airflow system to achieve a good airflow organization form.Regarding the construction of a certain airflow organization test platform,the corresponding theoretical research and engineering construction work is carried out according to its reconfigurable and precise temperature control requirements.The main contents include the core technology analysis and research of each subsystem of the test platform,system design,and environmental Simulation verification and adjustment of airconditioning supply plan,design and system construction of data collection and monitoring system.The above work provides a test platform basis for the subsequent air space organization experiments in a specific space.The airflow organization test platform subsystem is composed of airflow organization test room(experiment room and environment room),reconfigurable pipe network system,aero-hydrodynamic system,and multi-parameter test platform measurement and control system.Using the idea of modular design,the reconstruction method of the envelope structure is studied.Designed a reconstruction module for easy disassembly and adjustment in the experiment room,and studied the corresponding flexible adjustment of the laboratory air supply and return system plan to meet the needs of the experiment room to change its geometric characteristics according to the transformation of the research object,at the same time can achieve different types of airflow organization.The environment room of the airflow test room provides a temperature-controlled surrounding environment for the laboratory.The accuracy of space temperature control in the environmental room requires that the deviation between the temperature of the monitoring point and the design temperature is ≤±1℃,and the maximum deviation between the temperature of the indoor main area and the design temperature is ≤±2℃.In this paper,the CFD simulation method and theoretical analysis are used to carry out a comparative simulation study on the design conditions and variable load conditions of the air-conditioning temperature control scheme of the environmental room.The better airconditioning temperature control scheme is obtained and verified in Under design conditions and variable load conditions,the adjustment measures given by the research can better control the temperature of the environmental chamber to meet the design requirements.The actual temperature measurement results of the environmental chamber indicate that the requirements for precise temperature control in the space have been met.Aiming at the characteristics of multi-parameter measurement and control of the air flow organization test platform,combined with engineering analysis,different technical measures for different parameters were studied,and wireless and wired network communication methods were adopted for transmission.Designed and developed a multichannel high-precision portable temperature acquisition module based on the wireless network,and a thermal load simulator to simulate indoor load.The portable 8-point temperature acquisition module with the wireless transmission(up to 96 points for system integration)solves the problem of temperature monitoring point layout when the flow field characteristics change in the airflow experiment.At the same time,based on the Lab VIEW programming environment,the test platform control program was written and debugged successfully,and the platform’s monitoring and control adjustment functions were realized.Fully utilize the numerical simulation technology and computer digital measurement and control technology to study and solve the high-precision engineering requirements of the airflow test platform for temperature control.The temperature control accuracy of the airflow test platform constructed based on this can be controlled within ±1℃ at the monitoring point.The construction of the platform provides reliable test conditions for the follow-up research and development of airflow test research.