【作者】 傅允准；

【导师】 张旭；

【作者基本信息】 同济大学 ， 供热、供燃气、通风及空调工程， 2007， 博士

【摘要】 本文以某同步辐射光源的储存环隧道高精度恒温空调系统为背景，由于恒温室的特殊性，电磁铁设备大发热量和狭小的隧道空间，以致于高精度恒温室空调系统只能采用大温差小风量送风，且恒温室内外干扰因素多，导致了其恒温精度很难达到预期效果。为了保证恒温室温度稳定，本课题主要开展高精度恒温空调系统的扰量特性、气流组织方式和控制策略的研究。首先，根据储存环隧道建筑结构和电磁铁设备散热量大的特点，研究冷却水和空调系统设备发热量的分担率，简化恒温室模型，采用CFD数值模拟方法，分析大温差送风对恒温室指标参数的影响和在单扰量和多扰量作用时高精度恒温室温度动态响应特性，从而确定各扰量临界范围。然后，研究恒温室在内扰作用和外扰作用以及内外扰同时作用时温度动态响应特性和不同气流组织抗干扰能力。最后，对气流组织抗干扰能力和扰量特性进行实验研究。通过研究得出：恒温室分别在内扰或外扰为主以及内外扰并重的情况下，恒温室和外围空调房间最佳的气流组织组合形式。最后，提出了DMC-PID串级控制在高精度恒温空调系统的应用。电磁铁设备温度DMC-PID串级控制系统中，内回路采用PID控制快速消除设备冷却水供回水温度波动等扰量，外回路采用动态矩阵控制，保证电磁铁设备温度稳定，减少对恒温室温度的影响。恒温室温度DMC-PID串级控制系统中，内回路采用PID控制快速消除送风温度波动等扰量，外回路采用动态矩阵控制，通过送风系统电加热器调节实现恒温室温度控制。通过研究得出：DMC-PID串级控制在空调送风系统和电磁铁设备冷却水系统的应用具有可行性和有效性，且该控制策略具有很强的模型失配时的鲁棒性、跟踪性能以及抗干扰能力。更多还原

【Abstract】 The object of this dissertation was the high accuracy constant temperature air-conditioning system of some Synchrotron Radiation Facility storage ring tunnel. Because of the constant temperature room particularity with large electromagnet equipment heat radiation and small tunnel space, large temperature difference supply air technology was adopt in the high accuracy constant temperature air-conditioning system, but also disturbance indoors and outer constant temperature room were a great many, as a result, its constant temperature precision was very difficult to achieve the anticipated effect. In order to guarantee the temperature stability of constant temperature room, disturbance characteristics, air distribution and control strategy were asked to study in the dissertation.First, according to characteristics of storage ring tunnel structure and large electromagnet equipment heat radiation, the electromagnet equipment heat radiation contribution rate of cooling water and air-conditioning systems was to study. With room temperature simplified model, the CFD simulation method was applied to analyse large temperature difference supply air effects on room index parameters and temperature dynamic response characteristics with single or much disturbance function. At last, the critical scope of each disturbance was obtained. Secondly, the CFD simulation method was applied to analyse temperature dynamic response characteristics and anti-jamming capability of different air distribution with inner or outer disturbance and both simultaneity function, and then experiment method was applied to study anti-jamming capability of air distribution and disturbance characteristics. By comparative analysis and research, the best air distribution portfolio was drawn on constant temperature room and air-conditioned room next door under different circumstances.Finally, DMC-PID cascade control strategy was adopted to apply on high accuracy constant temperature air conditioning system. When DMC-PID cascade control strategy was adopted to electromagnet equipment temperature control system, PID control was used in inner loop to overcome equipment cooling water temperature fluctuations disturbance, etc, DMC algorithm was adopted in outer loop, the control strategy could ensure electromagnet equipment temperature stability to reduce it effect on the room temperature stability. When DMC-PID cascade control strategy was adopted to constant temperature room temperature control system, PID control was used in inner loop to overcome supply air temperature fluctuations disturbance, DMC algorithm is adopted in outer loop, at last, the temperature would be controlled through the air conditioning system of electric heater. The simulation result shows DMC-PID cascade control strategy application on high accuracy constant temperature air conditioning system has feasibility and effectiveness, and the control strategy has strong robust stability, tracking performance, anti-disturbance ability characteristics.更多还原