During operation, a portion of the energy supplied to the IT equipment will be converted into heat. This amount of heat must be removed to prevent the risk. Traditional cooling methods are only effective when the power supply to the cooling system accounts for a small portion of the total power consumption. With today’s high density IT equipment, the power capacity in a Data Center can be up to 20 kW per rack or more. From simulation data and experience from some manufacturers, traditional cooling does not meet the demand for high density operations.