Influence of rubber ball on-line cleaning device on chiller performance

To investigate the cleaning effect of rubber ball on-line cleaning device, tests and compares the fouling resistance and the cooling coefficient of performance of a chiller with or without rubber ball on-line cleaning device. The results show that the device has a good descaling effect, the average fouling resistance of condenser is reduced by 74.38%, and the average cooling coefficient of performance is improved by 11.31% as the device is put into use. Taking the minimum operating cost per hour as objective function, establishes an optimal cleaning cycle calculation model, and obtains the optimal cleaning cycle, the optimal cleaning interval time is 28 hours and optimal cleaning duration is 8 hours. Under the optimal operational mode, the operating cost per hour is decreased by 3.76% compared with that of the continuous cleaning mode, and the dynamic payback period is 2.6 years.