Patent ID: 8397529

Claim:
An air conditioning system comprising: an evaporator having a refrigerant flowing therethrough for transferring heat from a flow of air to the refrigerant to cool the flow of air; said evaporator including a manifold extending in a horizontal direction; at least one tube in fluid communication with said manifold and extending downward in a vertical direction away from said manifold; said evaporator defining at least one PCM tank for storing a phase change material to transfer heat from the phase change material to the refrigerant to cool and freeze the phase change material in said first operating mode; and said PCM tank engaging said manifold for transferring heat from the refrigerant to the frozen phase change material to condense the refrigerant in a second operating mode whereby the condensed refrigerant falls downwardly in said vertical direction through said tube to receive heat from a flow of air to cool the flow of air in said second operating mode.