Method and apparatus for optimizing refrigeration systems
First Claim
1. An apparatus, comprising:
- an input configured to receive physical parameters useful for a thermodynamic analysis of refrigeration system performance and defining a current operating state of the refrigeration system;
at least one automated processor configured to;
perform a thermodynamic analysis of the refrigeration system based on at least the received physical parameters;
determine a consistency of the refrigeration system according to the thermodynamic analysis with a previously determined thermodynamic model of the refrigeration system with respect to the current operating state of the refrigeration system; and
estimate a deviance of the refrigeration system from an optimal refrigeration system at the current operating state of the refrigeration system, based on the thermodynamic analysis and the determined consistency to generate an estimate of deviance; and
an output for presenting the estimate of deviance.
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Abstract
A control system for controlling a refrigeration system having an operating point, comprising: a memory configured to store a relationship of at least an evaporator efficiency, an evaporator heat load, a refrigerant amount in the evaporator, and a variable dependent on a non-volatile liquid mixed with refrigerant in the evaporator an input port configured to receive a signal corresponding to at least a measured evaporator heat load during operation; an output port configured to present an output to selectively alter an operating point of the evaporator, by altering the refrigerant amount in the evaporator and thereby changing the variable; and a processor, configured to receive the signal, access the memory; and generate the output to selectively move toward an optimum operating point. A corresponding method and refrigeration system are provided.
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Citations
20 Claims
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1. An apparatus, comprising:
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an input configured to receive physical parameters useful for a thermodynamic analysis of refrigeration system performance and defining a current operating state of the refrigeration system; at least one automated processor configured to; perform a thermodynamic analysis of the refrigeration system based on at least the received physical parameters; determine a consistency of the refrigeration system according to the thermodynamic analysis with a previously determined thermodynamic model of the refrigeration system with respect to the current operating state of the refrigeration system; and estimate a deviance of the refrigeration system from an optimal refrigeration system at the current operating state of the refrigeration system, based on the thermodynamic analysis and the determined consistency to generate an estimate of deviance; and an output for presenting the estimate of deviance. - View Dependent Claims (2, 3)
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4. A method for determining a deviance of a refrigeration system from an optimum refrigeration system, comprising:
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obtaining physical parameters at an operating state of the refrigeration stem sufficient to perform a thermodynamic analysis of performance of the refrigeration system; defining a model of the refrigeration system; performing the thermodynamic analysis of the refrigeration system at the operating state based on at least the obtained physical parameters; determining inconsistencies of the thermodynamic analysis of the refrigeration system at the operating state with the defined model of the refrigeration system evaluated at the operating state; and estimating a deviance of the refrigeration system at the operating state, from the optimum refrigeration system having a corresponding configuration to the refrigeration system and being optimized at the operating state, to determine an estimate of deviance based on the determined inconsistencies; and outputting the estimate of deviance. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method, comprising:
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thermodynamically modeling a refrigeration system having a compressor which consumes a compressor power, a condenser, an evaporator, a superheat level in a headspace of the evaporator, and a refrigerant having a refrigerant purity, to provide a predictive model for the refrigeration system at an operating state, with respect to at least the refrigerant purity, the compressor power, and the superheat level; predicting a thermodynamic effect of an alteration of the refrigerant purity and compressor power on the superheat level and the predictive model, at the operating state; altering at least one of the refrigerant purity and the compressor power to achieve a predicted optimum condition for operation of the refrigeration system at the operating state, feedback controlled based on at least the superheat level. - View Dependent Claims (20)
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Specification