ABSTRACT
Central chilling systems consume about 25 to 50 per cent of annual energy budgets in most air-conditioned commercial buildings. Well-monitored and controlled central chilling systems have great potential to improve operation reliability and reduce overall energy consumption. This chapter presents the energy characteristics and basic control of chillers, typical chilling system configurations, the general approaches for optimal control of chilling systems, the optimal control of heat-rejection systems and the systematic optimization of heat-rejection systems, the optimal set-point reset of chilled water temperature, the sequence control of multiple chiller plants and the optimal control of chilled water distribution systems.
