EFFICIENT CONTROL OF MODERN INDUSTRIAL REFRIGERATION PLANT

摘要

Modern efficient designs of industrial refrigeration plant will almost certainly employ speed control forrnmotor driven machines including compressors, fans and pumps. However, to take best advantage of these atrnlow refrigeration loads and at ambient temperatures below the design value the control system must dictaternthe most efficient operating speed for the machines. Year-round operation of large industrial refrigerationrnplant gives considerable opportunities for energy savings but maximising those savings requires both thernfunctional capability to adjust the speed of motor driven machines and the correct control strategy to ensurernthe saving on one element is not offset by an additional energy requirement due to a negative impact onrnanother machine or a heat exchanger. This paper will consider how an integrated control system can controlrna number of variable speed machines to achieve maximum overall efficiency of a modern industrialrnrefrigeration plant.rnThe parameters that influence the target setpoint are often already being measured and can easily bernintegrated into control algorithms. The impact of efficient control on reliability and maintenancernrequirements will be included. Methods to determine the most efficient control strategy will be considered.rnResults and a case study will be presented.