Processes and apparatus for recovering energy from a petroleum, petrochemical, or chemical process are disclosed. The process comprises providing a fluid process stream in a petroleum, petrochemical, or chemical process zone having a direct current power input; controlling a flow rate of the process stream by directing at least a portion of the process stream through a first power-recovery turbine to generate electric power as direct current therefrom; and providing the recovered direct current to the direct current power input of the process zone.

Methods and apparatus for recovering power in a hydroprocessing process are described. The method involves the use of a power-recovery turbine in place of, or in addition to, a control valve. A hydrocarbon feed stream is combined with a portion of a hydrogen stream. The combined stream is heated, and the heated stream is introduced into a hydroprocessing reaction zone having at least two beds. The heated stream is contacted with a first hydroprocessing catalyst to form a first hydroprocessed stream. At least part of a portion of the hydrogen stream is combined with the first hydroprocessed stream to form a first quenched hydroprocessed stream. The first quenched hydroprocessed stream is contacted with a second hydroprocessing catalyst to form a second hydroprocessed stream. At least a portion of the second portion of the hydrogen stream is directed through a power-recovery turbine to generate electric power.

Methods and apparatus for recovering power in a hydroprocessing process are described. The method involves the use of a power-recovery turbine in place of, or in addition to, a control valve. A hydrocarbon feed stream is combined with a portion of a hydrogen stream. The combined stream is heated, and the heated stream is introduced into a hydroprocessing reaction zone having at least two beds. The heated stream is contacted with a first hydroprocessing catalyst to form a first hydroprocessed stream. At least part of a portion of the hydrogen stream is combined with the first hydroprocessed stream to form a first quenched hydroprocessed stream. The first quenched hydroprocessed stream is contacted with a second hydroprocessing catalyst to form a second hydroprocessed stream. At least a portion of the second portion of the hydrogen stream is directed through a power-recovery turbine to generate electric power.

An Organic Rankine Cycle (ORC) device and method for transforming heat from a heat source into mechanical energy. The ORC includes a closed circuit containing a two phase working fluid. The circuit comprises a liquid pump for circulating the working fluid consecutively through an evaporator which is configured to be placed in thermal contact with the heat source; through an expander for transforming the thermal energy of the working fluid into mechanical energy; and through a condenser which is in thermal contact with a cooling element. The expander is situated above the evaporator. The fluid outlet of the evaporator is connected to the fluid inlet of the expander by a raiser column which is filled with a mixture of liquid working fluid and of gaseous bubbles of the working fluid, which mixture is supplied to the expander.

An Organic Rankine Cycle (ORC) device and method for transforming heat from a heat source into mechanical energy. The ORC includes a closed circuit containing a two phase working fluid. The circuit comprises a liquid pump for circulating the working fluid consecutively through an evaporator which is configured to be placed in thermal contact with the heat source; through an expander for transforming the thermal energy of the working fluid into mechanical energy; and through a condenser which is in thermal contact with a cooling element. The expander is situated above the evaporator. The fluid outlet of the evaporator is connected to the fluid inlet of the expander by a raiser column which is filled with a mixture of liquid working fluid and of gaseous bubbles of the working fluid, which mixture is supplied to the expander.

An apparatus configured to cool an electronic assembly includes an evaporator configured to evaporate a cooling medium using heat of the electronic assembly, and a power transformer configured to transform energy stored in the evaporated cooling medium into electric power. The cooling medium has an evaporating temperature at atmospheric pressure within a temperature range of 50 C. to 80 C.

An apparatus configured to cool an electronic assembly includes an evaporator configured to evaporate a cooling medium using heat of the electronic assembly, and a power transformer configured to transform energy stored in the evaporated cooling medium into electric power. The cooling medium has an evaporating temperature at atmospheric pressure within a temperature range of 50 C. to 80 C.

A method for providing energy from waste heat from an electrolysis process to one or more commercial or industrial operations is provided. The method includes the steps of converting water to oxygen and a hydrogen product through an electrolysis process, wherein the hydrogen product has a carbon intensity less than about 0.45 kg CO2e/kg H2, and wherein at least some of the required energy for the electrolysis process is provided from a biomass power plant. The method further includes recovering waste heat from the electrolysis process, and then converting at least some of the waste heat to thermal energy for use in the one or more commercial or industrial operations. Examples of commercial and industrial operations includes, without limitation, greenhouses, algae farms, district cooling, and district heating.

A method for providing energy from waste heat from an electrolysis process to one or more commercial or industrial operations is provided. The method includes the steps of converting water to oxygen and a hydrogen product through an electrolysis process, wherein the hydrogen product has a carbon intensity less than about 0.45 kg CO2e/kg H2, and wherein at least some of the required energy for the electrolysis process is provided from a biomass power plant. The method further includes recovering waste heat from the electrolysis process, and then converting at least some of the waste heat to thermal energy for use in the one or more commercial or industrial operations. Examples of commercial and industrial operations includes, without limitation, greenhouses, algae farms, district cooling, and district heating.

Electrical power systems, including generating capacity of a gas turbine are provided, where additional electrical power is generated utilizing a separate engine and auxiliary air injection system. The gas turbine and separate engine can operate on different fuel types.