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A chiller system for satisfying a cyclical cooling load including a fuel-fired prime mover and compressor set and a cold storage bank. The prime mover compressor set is sized for efficient, substantially continuous operation from cycle to cycle and the cold storage is sized to provide any short term

A chiller system for satisfying a cyclical cooling load including a fuel-fired prime mover and compressor set and a cold storage bank. The prime mover compressor set is sized for efficient, substantially continuous operation from cycle to cycle and the cold storage is sized to provide any short term deficiency of cooling rate in the prime mover compressor set. The prime mover compressor set is preferably operated during periods of cooling demand and is modulated in output capacity to extend real time matching of cooling delivery rate and consumption. A condenser reset temperature feature takes advantage of cyclic changes in operation to improve efficiency.

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A method of meeting a cyclic cooling load that exhibits peak cooling load characteristics which comprises providing a fuel-fired prime mover and refrigeration compressor set in a refrigeration circuit connected to a cold storage bank, sizing the prime mover compressor set to have a cooling energy de

A method of meeting a cyclic cooling load that exhibits peak cooling load characteristics which comprises providing a fuel-fired prime mover and refrigeration compressor set in a refrigeration circuit connected to a cold storage bank, sizing the prime mover compressor set to have a cooling energy delivery rate at least capable of meeting the total energy requirement of the cooling load cycle when operated continuously for a time corresponding to that between the initiation of successive cooling cycles, sizing the cold storage bank to have a cooling energy storage capacity at least equal to the requirement of the cooling load cycle less the product of the delivery rate of the prime mover compressor set times the duration of the cooling load cycle, connecting the output of the prime mover compressor set and the ice bank to the load, operating the prime mover compressor set substantially throughout the period between successive cooling cycles and through the peak cooling load cycle and supplementing any shortfall of cooling energy being delivered from the prime mover compressor set to the load on a real time basis with cooling energy previously produced by the prime mover compressor set and stored in the ice bank.