Patent ID: 8694131
Filing Date: 2014-04-08
Classification: F25B,G01C,G06K

Abstract:
1. A method for controlling an operation of a vapor compression system, such that a performance of the system measured in accordance with a metric of the performance is optimized, comprising the steps of: modifying a control signal with a modification signal including a perturbation signal having a first frequency, wherein the control signal controls a speed of at least one component of the vapor compression system, wherein components of the vapor compression system include a variable speed compressor and a variable speed evaporator fan altering heat transfer coefficients between air and heat exchangers; determining a metric signal representing a perturbation in an energy consumption of the vapor compression system, wherein the metric signal has a second frequency substantially equal to the first frequency; and adjusting the control signal based on a function of a phase between the perturbation signal and the metric signal, such that the performance is optimized, wherein the adjusting includes decreasing a value of the control signal if the phase is positive, and increasing the value of the control signal if the phase is negative, wherein the steps of the method are performed b a processor.