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Title: Countercurrent direct contact heat exchange process and system

Recovery of energy from geothermal brines and other hot water sources by direct contact heat exchange with a working fluid, such as a hydrocarbon working fluid, e.g. isobutane. The process and system consists of a plurality of stages, each stage including mixing and settling units. In the first stage, hot brine and arm working fluid are intimately mixed and passed into a settler wherein the brine settles to the bottom of the settler and the hot working fluid rises to the top. The hot working fluid is passed to a heat engine or turbine to produce work and the working fluid is then recycled back into the system. The system is comprised of a series of stages each containing a settler and mixer, and wherein the working fluid and the brine flow in a countercurrent manner through the stages to recover the heat from the brine in increments and raise the temperature of the working fluid in increments.
Authors:
 [1] ;  [2]
  1. (Claremont, CA)
  2. (San Juan Capistrano, CA)
Publication Date:
OSTI Identifier:
863419
Report Number(s):
US 4167099
DOE Contract Number:
E(04-3)-1076
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
countercurrent; direct; contact; heat; exchange; process; recovery; energy; geothermal; brines; hot; water; sources; direct; contact; heat; exchange; fluid; hydrocarbon; fluid; isobutane; process; consists; plurality; stages; stage; including; mixing; settling; units; stage; hot; brine; arm; fluid; intimately; mixed; passed; settler; brine; settles; bottom; settler; hot; fluid; rises; top; hot; fluid; passed; heat; engine; turbine; produce; fluid; recycled; comprised; series; stages; containing; settler; mixer; fluid; brine; flow; countercurrent; manner; stages; recover; heat; brine; increments; raise; temperature; fluid; increments; intimately mixed; water source; heat engine; direct contact; direct contact; heat exchange; heat exchange; hot water; geothermal brine; water sources; exchange process; geothermal brines; contact heat; contact heat /60/