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 Posted: Sun 3:53, 08 May 2011 Post subject: oakley solbriller Evaporative cooling air conditio |
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Evaporative cooling air conditioning system based on intelligent automatic control scheme
Supply and return water temperature decreases. However,[link widoczny dla zalogowanych], due to supply and return water temperature maximum and minimum limits, this method can not be the whole linear regulators, especially when the design temperature difference is large, the temperature adjustment range narrows, the system can not be adjusted properly. Therefore, when the outdoor temperature is higher than 30% and less than 34 ~ C, the system should adopt the temperature control. 4.2 flow control flow control is based on the size of the end of the load to change the circular flow, without changing the way the regulation of water temperature. Flow control can be variable flow control and pulse control. As the outdoor temperature, the flow rate increases. In accordance with the design conditions can be obtained when the temperature dropped to a certain extent,[link widoczny dla zalogowanych], reduce the flow of traffic will be below the minimum limit, so this regulation has limitations. Air conditioning system for the radiation, the end of the water flow is too small, will affect the end of the cooling effect, so when the outdoor temperature rose Engineering (1) was designed based on evaporative cooling air conditioning system automation program and control the end of radiation, the evaporative cooling The specific application of air conditioning and automatic control of close together, to achieve a significant reduction in energy consumption results; (2) proposed evaporative cooling and mechanical refrigeration air conditioning automatic control system combining the research program to the minimum investment and practical as the goal for evaporative cooling air temperature in southern China, the general promotion of high humidity region put forward new ideas; (3) arrange the order of evaporative cooling equipment emissions and to prepare the system running the program so that the whole air conditioning system to achieve the best temperature and humidity control, while significantly reduce energy consumption. References: ... the king as bamboo. Subject Development Refrigeration Research and Development Report [MJ. Beijing: Science Press, 2007. [2】 He Jin Bao,[link widoczny dla zalogowanych], Huang Xiang. Evaporative cooling system, variable air volume air conditioning automatic control of lJJ. Fluid Machinery, 2003 (supplement): 301 ~ 304. 【3】 Liu Xiang, Huang Xiang, Wu Zhixiang. PLC + fuzzy control evaporative cooling air conditioning control system for IJ1. Xi'an Engineering Science and Technology, 2007,21 (2): 207 ~ 211. 【4】 Rongyue Li. Application of fuzzy control theory and computer 【M]. Beijing Aerospace University Press, 1995. [5] Huang Xiang, Tian-Wei Qiang. Evaporative cooling air conditioning system to automatically control scheme IJIl HVAC, 2003.33 (4): 109 ~ 112 【6] monotoring, Kim Chuan Man, Guo yet. PLC automatic control system kept clean and air-conditioning of lJ1_ Shanghai University of Technology,[link widoczny dla zalogowanych], 2003, (2): 125 ~ 129. [7] Zhang Zihui, Huang Xiang, aging effect, and so on. Refrigeration and air conditioning automatic control [M]. Beijing: Science Press,[link widoczny dla zalogowanych], 1999. [8] Ren Xiaofen, Meng Ying. Air-conditioning system of radiation control IJI. Refrigeration Air Conditioning & Electric Power Machinery, 2008. (2): 78 ~ 82. Received date :2008-06-02 Revised :2008-08-07StudyonAutomaticControlSchemeofIntelligentAirConditioningSystemBasedonEvaporativeCoolingXIONGLi, HUANGXiang, QIANGTian-wei (Xi Throughenergysavingcontrolofcentralairconditioning, thepurposeofsignificantreducingtheenergyconsumptionisreached. Keywords: evaporativecooling; PLC; fuzzy-PIDcontrol; energysaving; temperaturecontrol; flowcontrolregulator Author: Xiong Li (1983 a), male, Jiangxi Nanchang, Master. 5. Volume l Bo
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