Design of a Central Air Conditioning System for a Large Chain Supermarket in Shanghai
Abstract: The design is for the Shanghai City, a large supermarket chain design central air conditioning system, a reasonable design of the central air-conditioning system, can provide a suitable working and shopping environment for indoor staff and shopping. Design content includes: the cooling and heating load calculation, pision of air-conditioning system and air conditioning system for the determination, of cold and heat source selection, design and calculation of wind system, send selected air, airflow calculation, design and layout of water system and hydraulic calculation. Calculates the cooling load according to every region of the enclosure structure, according to the cooling load and moisture load using a return air system calculates each region need fresh air volume and total volume, according to the calculated volume to determine all air system design, selection of air conditioning system. The design of air conditioning system, the air inlet size using the assumption that the flow velocity, according to the calculated air volume and the channel of the reasonable velocity determined wind tube size and the calculation of the wind pipe of the hydraulic, identify the most disadvantaged loop, to see whether the diameter selection of reasonable and figure out the entire line of the total resistance, and selected the appropriate chillers and chilled water pump according to the total resistance of the pipeline. Finally, the pipeline should be heat preservation, noise reduction and vibration reduction, reducing the impact of air conditioning units in the operation of the external environment, so that the requirements of the indoor comfort, and ultimately complete the design of the wind pipe line.

Key words: chain supermarket；central air conditioning；all air system；cold and heat load

1 绪论    1
1.1 中央空调系统的节能现状及发展趋势    2
1.1.1 中央空调系统节能的国内研究现状    2
1.1.2 中央空调系统节能的国外研究现状    3
1.2 空调的发展和前景    3
1.3 工程概况    6
1.3.1 该建筑物工程概况    6
1.3.2 上海气象参数    6
2 负荷计算    8
2.1 夏季空调冷负荷计算    8
2.1.1 围护结构冷负荷    8
2.1.2 室内热源散热形成的冷负荷    9
2.2 冬季热负荷的计算    11