Power Usage Effectiveness Evaluation to Data Centres of Oscillated Power and Thermal Demand

Data centres of oscillated power and thermal demand usually have lower effectiveness energy performance relatively, because their cooling systems often operate at low efficiency. Power usage effectiveness evaluation can provide the guidance for the retrofit or the expansion of these data centres. The building structure and the other influential factors, i.e. equipment, geographic and climatic conditions, are considered for the data centres. A method to evaluate the power usage effectiveness is proposed by using a combination of energy consumption indexes and group decision-making of mixed-language information. The cooling capacity is used to forecast the power load in the data centre and the cooling capacity is obtained by calculating the heat load of the data centre. An example is given to prove the applicability and accuracy of the method, and recommendations are proposed to improve the performance in the data centre.