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Combustion-powered compound refrigeration system
iv
New Patents
lurried and recycled to the fired reactor 3 for further combustion.
4873384 METHOD FOR PRODUCING DICHLOROETHANE Shun Wachi, Yuusaku Ariki, Hiroshi Oshima, Takasago, Japan assigned to Kanegafuchi Kagaku Kogyo Kabushiki Kaisha A method for producing dichloroethane (EDC) by reacting ethylene and chlorine in a liquid reaction medium composed mainly of EDC at a temperature of not less than the boiling point of EDC measured at ordinary pressure, characterized by leading the vapor of the reaction medium generated in a reactor from the top of the reactor to a heat exchanger so as to recover and utilize the latent heat resulting from condensation of the vapor in the heat exchanger. According to the present invention, high heat utilization eff~ency can be attained with advantages as compared with conventional EDC production methods.
4873831 CRYOGENIC R K i ~ i ~ T O R EMPLOYING C O ~ W PASSAGEWAYS Axel G Dehne assigned to Hughes Aircraft Company A cryogenic refrigerator is di~lmed having an expander piston reciprocally mounted within a fluid-tight housing. High pressure gas is supplied to a variable cold volume at one end of the piston through a passageway in the piston when the variable cold volume is at its minimum, Differential forces on the o p p ~ t e end of the piston cause the piston to move, thereby enlarsing the variable cold volume. The expanded cooled gas in the variable volume is vented out through the piston passageway which has been moved into fluid communication with a venting conduit when the variable volume is at its maximum. A heat exchanger operatively disposed between the gas supply and venting conduit allows the cold venting gas to cool the incoming ~ pressure gas. The cycle of operation employs isothermal expansion for obtaining coofing with a theoretical efficiency equal to that of a Carnot
cycle thus; the refrigerator is more efficient than those using a Joule-Thompson cycle and is not limited to any specific refrigeration temperature (e.g., the boiling temperature of the working fluid).
4873835 PROCESS FOR THE Si]'dULTANEOUS ~ C H A N G E OF HEAT AND M A ~ ~ G H A POROUS WALL Alexandr Rojey, Alain Grehier, Garches, France assigned to Institut Francais du Petrole The invention relates to a process for the simultaneous exchange of heat and matter through a porous wall. A relatively hot gaseous mixture o f two constituents passes through an exchange compartment by flowing along the first surface of a porous wall and is progressively cooled, which causes the condensation of a fraction of said mixture. This fraction is vaporized on the second surface of the wall in contact with a relatively cold gas. This process is useful for the fractionation of a mixture of two constituents of a gas, for example, of a mixture of pentane and heptane.
4873839 COMBUSTION-PO~ COMPOUND REFIHGERATION SYSTEM Daniel J Dessanti, Hans Schorr assigned to The Brooklyn Union Gas Company In refrigeration systems wherein the refrigerant compressor is driven by a prime mover powered by combustion of a fluid fuel, a notable saving in fuel consumption is achieved by utilizing waste heat in the hot exhaust gases from the prime mover in an ammonia absorption refriFration unit to produce refrigeration in the form of liquid ammonia. Subcooled fiquid ammonia is used to sub~ol the compmmd and c o ~ refri~rant prior to its exlzmsion and evaporation to produce saleable refrigeration. Tim compound refrigeration system is economically attractive for producing large tonnage refrigeration particularly when a comb~tion turbine coupled to a centrifugal compressor is used.
New Patents
lurried and recycled to the fired reactor 3 for further combustion.
4873384 METHOD FOR PRODUCING DICHLOROETHANE Shun Wachi, Yuusaku Ariki, Hiroshi Oshima, Takasago, Japan assigned to Kanegafuchi Kagaku Kogyo Kabushiki Kaisha A method for producing dichloroethane (EDC) by reacting ethylene and chlorine in a liquid reaction medium composed mainly of EDC at a temperature of not less than the boiling point of EDC measured at ordinary pressure, characterized by leading the vapor of the reaction medium generated in a reactor from the top of the reactor to a heat exchanger so as to recover and utilize the latent heat resulting from condensation of the vapor in the heat exchanger. According to the present invention, high heat utilization eff~ency can be attained with advantages as compared with conventional EDC production methods.
4873831 CRYOGENIC R K i ~ i ~ T O R EMPLOYING C O ~ W PASSAGEWAYS Axel G Dehne assigned to Hughes Aircraft Company A cryogenic refrigerator is di~lmed having an expander piston reciprocally mounted within a fluid-tight housing. High pressure gas is supplied to a variable cold volume at one end of the piston through a passageway in the piston when the variable cold volume is at its minimum, Differential forces on the o p p ~ t e end of the piston cause the piston to move, thereby enlarsing the variable cold volume. The expanded cooled gas in the variable volume is vented out through the piston passageway which has been moved into fluid communication with a venting conduit when the variable volume is at its maximum. A heat exchanger operatively disposed between the gas supply and venting conduit allows the cold venting gas to cool the incoming ~ pressure gas. The cycle of operation employs isothermal expansion for obtaining coofing with a theoretical efficiency equal to that of a Carnot
cycle thus; the refrigerator is more efficient than those using a Joule-Thompson cycle and is not limited to any specific refrigeration temperature (e.g., the boiling temperature of the working fluid).
4873835 PROCESS FOR THE Si]'dULTANEOUS ~ C H A N G E OF HEAT AND M A ~ ~ G H A POROUS WALL Alexandr Rojey, Alain Grehier, Garches, France assigned to Institut Francais du Petrole The invention relates to a process for the simultaneous exchange of heat and matter through a porous wall. A relatively hot gaseous mixture o f two constituents passes through an exchange compartment by flowing along the first surface of a porous wall and is progressively cooled, which causes the condensation of a fraction of said mixture. This fraction is vaporized on the second surface of the wall in contact with a relatively cold gas. This process is useful for the fractionation of a mixture of two constituents of a gas, for example, of a mixture of pentane and heptane.
4873839 COMBUSTION-PO~ COMPOUND REFIHGERATION SYSTEM Daniel J Dessanti, Hans Schorr assigned to The Brooklyn Union Gas Company In refrigeration systems wherein the refrigerant compressor is driven by a prime mover powered by combustion of a fluid fuel, a notable saving in fuel consumption is achieved by utilizing waste heat in the hot exhaust gases from the prime mover in an ammonia absorption refriFration unit to produce refrigeration in the form of liquid ammonia. Subcooled fiquid ammonia is used to sub~ol the compmmd and c o ~ refri~rant prior to its exlzmsion and evaporation to produce saleable refrigeration. Tim compound refrigeration system is economically attractive for producing large tonnage refrigeration particularly when a comb~tion turbine coupled to a centrifugal compressor is used.