Patent ID: 6116031
Filing Date: 2000-09-12
Classification: F01K,F17C

Abstract:
A process for recovering power, comprising the steps of:(a) pumping liquefied natural gas from a pressure at or near atmospheric pressure to a pressure above 1379 kPa (200 psia) and below the critical pressure of the natural gas;(b) passing the pressurized liquefied natural gas through a first heat exchanger whereby the pressurized liquefied natural gas is heated to a temperature above -112.degree. C.(-170.degree. F.) and the liquefied natural gas continuing to be at or below its bubble point; and(c) circulating a refrigerant as a working fluid in a closed circuit through the first heat exchanger to condense the refrigerant and to provide heat for warming the liquefied gas, through a pump to pressurize the condensed refrigerant, through a second heat exchanger in which heat is absorbed from a heat source to vaporize the pressurized refrigerant, and through a gas turbine to produce energy.