Discussion on balance adjusting technology for large central air conditioning water system—A case study of Huachen BMW Assembly and Logistics Shop

Taking a balance adjusting project of the Assembly and Logistics Shop as an example, discusses the commissioning methods of different pipe network systems of a central air conditioning water system and the interaction among terminal equipment during the commissioning process. The results show that the system can be adjusted zone by zone in order to improve the working efficiency when installing a self-operated differential pressure control valve in each sub-circuit. For a commissioning project, there is no significant effect on the resistance of the whole pipe network during the commissioning process when the pressure difference value of the control valve is set in the control range. But in order to ensure the stability of the system, the middle value of the control range should be adopted. When the valve controls less terminal equipment within the controlled circuit, more than 10% of the error caused by the interaction among the measured devices cannot be neglected.