TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The thermally activated system (II) for increasing the pressure of a gaseous working fluid, comprises the absorber, in which a lower pressure, substantially gaseous stream of the working fluid is absorbed into a lower pressure, liquid stream of the absorbent to form a liquid solution, where the absorbent comprises components of the working fluid and the solvent, a cooler that removes heat from the absorber, a pressure boosting device that increases the pressure of at least a portion of the liquid solution to obtain a higher pressure liquid solution, a generator that separates the higher pressure liquid solution into at least a higher pressure, substantially vaporized stream of the working fluid and a higher pressure, liquid stream of the sorbent, a condenser that substantially condenses at least a portion of the higher pressure, substantially vaporized stream of the working fluid to obtain a substantially condensed stream of the working fluid, a heat exchanger that cools at least a portion of the substantially condensed stream of the working fluid to obtain a sub-cooled stream of the working fluid, while heating another stream, a pressure reducing device that reduces the pressure of at least a portion of the substantially cooled stream of the working fluid to obtain a lower pressure stream of the working fluid, an evaporator (13) that at least partially vaporizes at least a portion of the lower pressure stream of the working fluid to obtain an at least partially vaporized stream of the working fluid, while removing heat from another heat source, where the other heat source is heat from environment of an enclosed space or a process stream when the thermally activated system is used for heating the enclosed space or the process stream, or heat from an enclosed space or a process stream when the thermally activated system is used for cooling the enclosed space or the process stream and the other stream in the heat exchanger comprises at least a portion of the at least partially vaporized stream of the working fluid, heating of which results in the lower pressure, substantially gaseous stream of the working fluid, at least a portion of which is fed to the absorber, a second heat exchanger that cools at least a portion of the higher pressure, liquid stream of the absorbent to obtain a sub-cooled, liquid stream of the absorbent; and a second pressure reducing device that reduces the pressure of at least a portion the sub-cooled, liquid stream of the absorbent to obtain the lower pressure, liquid stream of the absorbent, at least a portion of which is fed to the absorber. The thermally activated system (I) comprises: an absorber, in which a lower pressure, substantially gaseous stream of the working fluid is absorbed into a lower pressure, liquid stream of an absorbent to form a liquid solution, where the absorbent comprises components of the working fluid and the solvent; a cooler that removes heat from the absorber; a pressure boosting device that increases the pressure of at least a portion of the liquid solution to obtain a higher pressure liquid solution; and a generator that separates at least a portion of the higher pressure liquid solution into at least a higher pressure, substantially vaporized stream of the working fluid and a higher pressure, liquid stream of the sorbent. The thermally activated system (I) further comprises: a condenser that substantially condenses at least a portion of the higher pressure, substantially vaporized stream of the working fluid to obtain a substantially condensed stream of the working fluid; a pressure reducing device that reduces the pressure of at least a portion of the substantially condensed stream of the working fluid to obtain a lower pressure stream of the working fluid; an evaporator that at least partially vaporizes at least a portion of the lower pressure stream of the working fluid to obtain an at least partially vaporized stream of the working fluid, while removing heat from another heat source, where the other heat source in the evaporator is heat from environment of an enclosed space or a process stream when the thermally activated system is used for heating the enclosed space or the process stream, or heat from an enclosed space or a process stream when the thermally activated system is used for cooling the enclosed space or the process stream; and a heat exchanger that cools at least a portion of the substantially condensed stream of the working fluid from the condenser to obtain a sub-cooled stream of the working fluid, while heating another stream, where at least a portion of the sub-cooled stream of the working fluid is subsequently fed to the pressure reducing device to obtain the lower pressure stream of the working fluid, and the other stream in the heat exchanger comprises at least a portion of the at least partially vaporized stream of the working fluid from the evaporator, heating of which results in the lower pressure, substantially gaseous stream of the working fluid, at least a portion of which is fed to the absorber. The second heat exchanger cools at least a portion of the higher pressure, liquid stream of the absorbent from the bottom section of the generator to obtain the sub-cooled liquid stream of the absorbent, while heating and partially vaporizing at least a portion of the higher pressure, liquid solution from the pressure boosting device to obtain a higher pressure, two-phase stream, which is subsequently fed to an intermediate location of the generator. The thermally activated system (I) comprises more than one generator.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The working fluid is 1,1,1,2-tetrafluoroethane, dimethyl ether, difluoroethane, methyl iodide, propane, isopropane, propylene, isobutane, n-butane and/or 2,3,3,3-tetrafluoropropene. The solvent has a viscosity of less than 2.5 cP at 20 degrees C. The solvent is N-methyl-2-pyrrolidone, dimethyl sulfoxide, dimethylformamide and/or dimethylacetamide. Preferred Process: The process (III) comprises: absorbing a lower pressure, substantially gaseous stream of the working fluid into a lower pressure, liquid stream of an absorbent in the absorber to form a liquid solution; removing heat from the absorber; increasing the pressure of at least a portion of the liquid solution to obtain a higher pressure liquid solution; and separating at least a portion of the higher pressure liquid solution in the generator to obtain at least a higher pressure, substantially vaporized stream of the working fluid and a higher pressure, liquid stream of the absorbent. The process (III) further comprises: substantially condensing at least a portion of the higher pressure, substantially vaporized stream of the working fluid to obtain a substantially condensed stream of the working fluid; reducing the pressure of at least a portion of the substantially condensed stream of the working fluid to obtain a lower pressure stream of the working fluid; and vaporizing at least a portion of the lower pressure stream of the working fluid in an evaporator to obtain an at least partially vaporized stream of the working fluid, while removing heat from another heat source, where the other heat source in the vaporizing step is heat from environment of an enclosed space or a process stream when the thermally activated system is used for heating the enclosed space or the process stream, or heat from an enclosed space or a process stream when the thermally activated process is used for cooling the enclosed space or the process stream; and cooling at least a portion of the substantially condensed stream of the working fluid in the heat exchanger to obtain a sub-cooled stream of the working fluid, while heating another stream; feeding at least a portion of the lower pressure, substantially gaseous stream of the working fluid to the absorber; and reducing the pressure of at least a portion of the sub-cooled stream of the working fluid to obtain the lower pressure stream of the working fluid. In the process (IV), the portion of the higher pressure, liquid solution is heated and partially vaporized constitutes 80-99 mol.% of the higher pressure, liquid solution and 1-20 mol.% of the higher pressure, liquid solution is sent to the top of the generator without being heated and partially vaporized. The higher pressure, substantially vaporized stream of the working fluid obtained from the generator contains up to 5 mol.% of the solvent, and the at least partially vaporized stream of the working fluid obtained from the evaporator contains 0.1-5 mol.% liquid. In the process (III), the separating step utilizes more than one generator. The thermally activated process (IV) for increasing the pressure of a gaseous working fluid, comprises absorbing a lower pressure, substantially gaseous stream of a working fluid into a lower pressure, liquid stream of the absorbent in the absorber to obtain a liquid solution, removing heat from the absorber, increasing the pressure of at least a portion of the liquid solution by a pressure boosting device to obtain a higher pressure liquid solution, separating at least a portion of the higher pressure liquid solution in a generator to obtain at least a higher pressure, substantially vaporized stream of the working fluid and a higher pressure, liquid stream of the absorbent, substantially condensing at least a portion of the higher pressure, substantially vaporized stream of the working fluid in a condenser to obtain a substantially condensed stream of the working fluid, cooling at least a portion of the substantially condensed stream of the working fluid, while heating another stream, reducing the pressure of at least a portion of the sub-cooled stream of the working fluid to obtain a lower pressure stream of the working fluid, vaporizing at least a portion of the lower pressure stream of the working fluid in an evaporator to obtain an at least partially vaporized stream of the working fluid, while removing heat from another heat source, feeding at least a portion of the lower pressure, substantially gaseous stream of the working fluid to the absorber, cooling at least a portion of the higher pressure, liquid stream of the absorbent in a second heat exchanger to obtain a sub-cooled, liquid stream of the absorbent, reducing the pressure of at least a portion of the sub-cooled, liquid stream of the absorbent to obtain the lower pressure, liquid stream of the absorbent and feeding at least a portion of the lower pressure, liquid stream of the absorbent to the absorber.