| Summary: | 碩士 === 國立臺北科技大學 === 能源與冷凍空調工程系碩士班 === 98 === This research aims at the Programmable Logic Controller (PLC) associates with fussy PID control on in-rack cooling system. Utilizing PLC control and monitoring each circuit point, and recording the temperature curve are collected to compute the transfer function of this system, then using the empirical law which is suggested by Z-N rule to compute the simulation control parameter.
According to the result of research we can find out that the energy-saving efficiency could be more accurate by joining PID control method. The maximum efficiency, PUE could be 1.36 when the temperature of condenser water is invariable, the PUE value could be 1.3~1.4 when the temperature is variable. This maximum energy efficiency PUE is much better than the average PUE 1.9 of the surveyed data in Taiwan and also better than the PUE 1.5 of design per ASHRAE 90.1-2007. Also, according to the classification which set by Green Grid, it may be classified in Gold/Silver Level (1.25~1.67), obviously the efficiency is better than other cases in Taiwan or wherever.
|
|---|
