Abstract: A cooling system comprises an air cooled condensing unit (ACCU) having a condenser outlet and a condenser inlet, and a phase change composite thermal energy storage module (PCCTESM) having first and second fluid paths disposed therethrough, wherein each of the first and second fluid paths have an inlet and an outlet. The cooling system further comprises at least one air handling unit (AHU) having an AHU inlet and an AHU outlet, a first expansion valve disposed between the condenser outlet and the first fluid path inlet, a fluid connection between the second fluid path inlet and the condenser outlet, a second expansion valve disposed between the AHU inlet and the second fluid path outlet, and a second fluid connection that connects the first fluid path outlet and the AHU outlet to the condenser inlet.

Abstract: A multi-mode high efficiency air conditioning system for storing energy and for utilizing the stored energy is provided. The air conditioning system includes these four elements which define the entire system: a condensing unit, a dual-mode indoor cooling coil assembly, a refrigerant and air management assembly and an energy storage assembly. These four elements act in concert to perform the functions of the four principal modes of operation which are ice building, ice transfer, stage 1 cooling and stage 2 cooling. The ice building and ice transfer modes typically take place during electrical off-peak periods. The stage 1 and stage 2 cooling modes typically take place during electrical on-peak periods. When connected to an indoor air fan, the air conditioning unit provides cooling at an energy efficiency ratio (EER) of 12 or better over a 24 hour period during a 95 degree Fahrenheit day.