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"Velocys will help end our dependence on foreign oil and benefit the military, which will one day be able to produce fuel for their operation locally, dramatically reducing the danger of re-supplying fuel to the combat zone."
-U.S. Congresswoman Debra Pryce,
October 2006

Patent Library

Process for cooling a product in a heat exchanger employing microchannels for the flow of refrigerant and product

United States Patent #6,622,519 (9/23/2003)

Mathias , et al.

This invention relates to a process for cooling a product in a heat exchanger, the process comprising: flowing a refrigerant through a set of first microchannels in the heat exchanger; flowing a refrigerant through a set of second microchannels in the heat exchanger, the refrigerant flowing through the set of second microchannels being at a lower temperature, a lower pressure or both a lower temperature and a lower pressure than the refrigerant flowing through the set of first microchannels; and flowing a product through a set of third microchannels in the heat exchanger, the product exiting the set of third microchannels having a cooler temperature than the product entering the set of third microchannels. This process is suitable for liquefying gaseous products including natural gas.