Energy Modelling for Data CenterInfrastructure

Sammanfattning: In this thesis work, a comprehensive static data center model with raised floor design is developed with improvements based on previous master thesis work. Enhancement work focuses on IT virtualization technology, a general server model, more detailed chiller system and mechanical system, novel modeling methodology for power devices (PDU and UPS). Besides, the temperature of CRAH supply air, CRAH supply water, evaporator water inlet, condenser water outlet and cooling tower water inlet are also able to be calculated in the static model. The parameter configuration of the static model is tuned so as to meet ASHRAE standards. Two airflow control approaches, traditional air supply with distributed airflow control and with room level control, are implemented in the static model with results comparison and analysis. Three case studies are conducted with analysis followed in the static model, including data center expansion, cooling control strategies, virtualization and IT load shifting. The robustness, flexibility and functionality of the static model are demonstrated through these three case studies. Furthermore, a dynamic model with slab floor design for a small data center is presented, for the purpose of investigating how servers are cooled down efficiently with consideration of both CRAH supply air temperature and its flow rate. This model is further implemented with control algorithms by other colleagues and only the development of model itself is included in this thesis work.