The present invention relates to a method for recycling energy in a butadiene preparation process using oxidative dehydrogenation, comprising the steps of: a) producing electricity by supplying, to a turbine, a part or all of a gas product discharged from a solvent absorption column; b) allowing the gas product, which has passed through the turbine, to pass through one or more device units comprising a heat exchanger; and c) injecting, into a reactor, the gas product having passed through the device units comprising a heat exchanger. The economical efficiency of a butadiene preparation process is improved by lowering the amount of pure energy required in the butadiene preparation process using oxidative dehydrogenation.

A lignite fired steam power plant comprising a water/steam power cycle, a dryer system for drying lignite coal and a heat recovery system for recovering thermal energy from the dryer system. The heat recovery system vaporises condensate against a vapour line of the dryer steam and then compresses the vaporised condensate for use to preheat either or both combustion air or condensate of the water/ steam power cycle.

The invention relates to a method for operating an internal combustion engine (11) in a six-stroke mode; the engine comprising at least one cylinder (20) with a reciprocating piston (21), each cylinder having at least one inlet and outlet valve (22, 23), wherein the method involves performing a first stroke where a gas comprising at least air is induced into a combustion chamber (24) from an intake conduit (25); a second stroke where the gas and injected fuel is compressed; a third stroke where the compressed fuel/gas mixture is expanded following an ignition; a fourth stroke where combusted exhaust gas is expelled through a catalyst body (26) into a first exhaust conduit (27); a fifth stroke where pressurized fuel and pressurized heated water is injected into the combustion chamber (24) to be expanded; and a sixth stroke where steam and gaseous fuel mixture is expelled through the catalyst body (26) into a second exhaust conduit (28).

The thermal solar power plant comprises a turbine (4) for generating electricity using vapor of a working fluid, a superheating assembly (8) comprising solar vapor superheaters (14, 16, 18) fluidly connected in series for superheating vapor using insolation and feeding the turbine with superheated vapor, and a heat storage assembly (10) thermally coupled to the superheating assembly (8) by at least one heat exchanger (30, 32) provided between two superheaters of the superheating assembly (8) in such manner as to take heat from superheated vapor and store heat.

A flow control device is used to regulate fluid flow from an upstream supply source to a downstream destination within a plant. At least portions of the flow control device are fabricated from one or more thermostatic materials selected based on the specific thermostatic properties thereof. The basic arrangement of the flow control device includes at least one housing with at least one thermostatic beam and at least one wall fixed thereto to define a void interior area with opposed open ends, and a center plug member with at least one opening in at least one wall thereof arranged within the interior area for temperature dependent fluid flow therethrough.

A system including an engine and a heat exchanger coupled to the engine is provided. The engine 2 includes an engine fluid and at least one of a compressor section 14 configured to compress a gas, a lubricant path configured to circulate a lubricant, or a coolant path configured to circulate a coolant. The engine fluid comprises at least one of the gas, the lubricant, or the coolant, and the engine fluid is a source of heat derived from one or more operations of the engine. The heat exchanger 3 is configured to receive the engine fluid from the engine and exchange heat between the engine fluid and a working fluid 8 to produce a heated working fluid and a cooled engine fluid, and the heat exchanger is configured to export the heated working fluid to a steam system 4.

Dispositif de récupération d'énergie pour véhicule à moteur, comprenant une source froide formée par un circuit (10) de fluide de refroidissement, un organe de régulation (11) du débit de fluide de refroidissement dans le circuit de fluide de refroidissement, et une unité de commande (12) agencée pour asservir le débit de fluide de refroidissement en fonction de la température du fluide de travail.