| With the progress of society and development of science and technology, people’s requirement on their quality of life is getting higher and higher, which is mainly manifested in the material life and spiritual life.Especially since the reform and opening up, C hina’s economy has obta ined the development which progresses by leaps and bounds, the springing up of all kinds of factories have sprung up across the country. And a large number of workers began to enter the factory, continue to create wealth for the society.Previously,The same time people slowly began to care about their work environment.Therefore, large space air conditioning heating industry began to slowly rise.Also, with the increasing of the spiritual life requirements, large stadiums(such as swimming pool, indoor basketball court), theaters, hall, exhibition hall also began to build up in the major cities of the country, which stimulates the heating and air conditioning industry in large space buildings.There are many kinds of large space air conditioning airflow organization way, the seat back includes ground blast roof air return, stadiums and blower, the space of the central sidewall air supply air and top etc..And large space air handling unit of this study is to belong to the top air supply mode.Through the study found that large space air velocity of temperature field is largely influenced by cold jet and the heat source. According to the specification for design of heating ventilating and air conditioning demands, in different environments, human body comfort require ment for temperature and wind speed is not the same. Sometimes the temperature field can meet the requirements of human body. But the velocity field can not meet; sometimes the velocity field can meet the requirements of human body. But the temperature fie ld can not meet. So the speed of air flow field and temperature field of the matching problem has become an important research direction of large space air conditioning.This experiment based on the Henan Q ianfeng HVAC Polytron Technologies Inc large space air conditioning laboratory, through the platform of making experiments, the program(including data acquisition program, making the temperature sensor with connection), acquisition of the experimental data in normal temperature condition, refrigeration and heating conditions with more than six months.This paper mainly studies the large space air jet at the normal temperature, refrigeration and heating conditions of the velocity field and temperature field.The first is the acquisition prototype in the experimental environment of the flow field of real data in the laboratory field, including more than three kinds of working conditions.And about the numerical model is set up, the scene with the method of numerical simulation to the above three conditions were simulated.Get the velocity field and temperature field simulation. Through the comparison of the measured results and simulation results analysis, first of all, you can probably determine the credibility of the results of the two kinds; confirm the results is credible, the analysis can be carried out both quantitative and qualitative data; finally, combined with the heating and cooling conditions on the condition of human comfort of wind speed and temperature requirements, according to the experiment and simulation the data were obtained under different conditions, the velocity field and the temperature field can satisfy the regulation method of qualitative human comfort requirements. |
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