A gas-fired instantaneous water heater including a thermoelectric generator (TEG) and a heat pump that is powered by the TEG to improve efficiency compared to existing water heaters. Water to be heated is circulated through the heat pump, TEG heat exchanger, and primary heat exchanger to produce a stream of heated water. An adjustable firing rate permeable matrix radiant burner is included, in which natural gas and air are combusted to produce combustion products, including heat. The combustion products are condensed in a condensing system to produce cooled and dry exhaust gas.

An integrated ITM micromixer burner shell and tube design for clean combustion in gas turbines includes an oxy-fuel micromixer burner for separating oxygen from air within the burner to perform oxy-combustion, resulting in an exhaust stream that consists of CO.sub.2 and H.sub.2O. The shell and tube combustion chamber is designed so that preheated air enters a headend having an array of ion transfer membrane (ITM) tubes that separate oxygen from the preheated air and anchor flamelets on the shell side. The combustion products of the oxy-fuel flamelets expand through a turbine for power generation, before H.sub.2O is separated from CO.sub.2 by condensation. A portion of the effluent CO.sub.2 is compressed back into the burner system, while the remainder is captured for sequestration/utilization.

An integrated ITM micromixer burner shell and tube design for clean combustion in gas turbines includes an oxy-fuel micromixer burner for separating oxygen from air within the burner to perform oxy-combustion, resulting in an exhaust stream that consists of CO.sub.2 and H.sub.2O. The shell and tube combustion chamber is designed so that preheated air enters a headend having an array of ion transfer membrane (ITM) tubes that separate oxygen from the preheated air and anchor flamelets on the shell side. The combustion products of the oxy-fuel flamelets expand through a turbine for power generation, before H.sub.2O is separated from CO.sub.2 by condensation. A portion of the effluent CO.sub.2 is compressed back into the burner system, while the remainder is captured for sequestration/utilization.

An integrated ITM micromixer burner shell and tube design for clean combustion in gas turbines includes an oxy-fuel micromixer burner for separating oxygen from air within the burner to perform oxy-combustion, resulting in an exhaust stream that consists of CO.sub.2 and H.sub.2O. The shell and tube combustion chamber is designed so that preheated air enters a headend having an array of ion transfer membrane (ITM) tubes that separate oxygen from the preheated air and anchor flamelets on the shell side. The combustion products of the oxy-fuel flamelets expand through a turbine for power generation, before H.sub.2O is separated from CO.sub.2 by condensation. A portion of the effluent CO.sub.2 is compressed back into the burner system, while the remainder is captured for sequestration/utilization.

An integrated ITM micromixer burner shell and tube design for clean combustion in gas turbines includes an oxy-fuel micromixer burner for separating oxygen from air within the burner to perform oxy-combustion, resulting in an exhaust stream that consists of CO.sub.2 and H.sub.2O. The shell and tube combustion chamber is designed so that preheated air enters a headend having an array of ion transfer membrane (ITM) tubes that separate oxygen from the preheated air and anchor flamelets on the shell side. The combustion products of the oxy-fuel flamelets expand through a turbine for power generation, before H.sub.2O is separated from CO.sub.2 by condensation. A portion of the effluent CO.sub.2 is compressed back into the burner system, while the remainder is captured for sequestration/utilization.

An integrated ITM micromixer burner shell and tube design for clean combustion in gas turbines includes an oxy-fuel micromixer burner for separating oxygen from air within the burner to perform oxy-combustion, resulting in an exhaust stream that consists of CO.sub.2 and H.sub.2O. The shell and tube combustion chamber is designed so that preheated air enters a headend having an array of ion transfer membrane (ITM) tubes that separate oxygen from the preheated air and anchor flamelets on the shell side. The combustion products of the oxy-fuel flamelets expand through a turbine for power generation, before H.sub.2O is separated from CO.sub.2 by condensation. A portion of the effluent CO.sub.2 is compressed back into the burner system, while the remainder is captured for sequestration/utilization.

A radiant tube recuperative burner assembly having a heat exchanger (13) and a burner (11); said heat exchanger (13) comprises: a first inner tube (15); a second heat exchanger tube (16) coaxial and external to the first tube (15); a third tube (24) coaxial and external to said second tube (16); a fourth tube (35) positioned perpendicular to said first tube (15); a fifth tube (36) coaxial and internal to said fourth tube (35); a flue gas outlet passage (27) positioned inside said fifth tube (36); a first gap (17) between said first tube (15) and said second tube (16); a second gap (25) between said third tube (24) and said second tube (16); a sixth gap (40) between said fourth tube (35) and said fifth tube (36); said first gap (17) communicates with said sixth gap (40); said second gap (25) communicates with said flue gas outlet passage (27); a Venturi tube (41, 52) positioned transverse to said fifth tube (36); the inlet of the Venturi tube (41, 52) communicates with said sixth gap (40); said Venturi tube (41, 52) has an outlet that is in communication with said flue gas outlet passage (27); and with a connection pipe (42) between said heat exchanger (13) and said burner (11).

An apparatus and method for generating electricity wherein the apparatus comprises a burner operably connected to a fuel source, an energy receiving housing radially surrounding the burner having an energy receiving surface inwardly oriented towards the radian burner, at least one thermoelectric generator applied to an outer surface of the energy receiving housing and a cooler in contact with the at least one thermoelectric generator so as to position the thermoelectric generator between the cooler and the energy receiving housing. The method comprises combusting a fuel with a burner, capturing the heat from the burner with the energy receiving housing and generating electricity with a thermoelectric generator applied to the outer surface of the housing between the housing and a cooler.

An apparatus and method for generating electricity wherein the apparatus comprises a burner operably connected to a fuel source, an energy receiving housing radially surrounding the burner having an energy receiving surface inwardly oriented towards the radian burner, at least one thermoelectric generator applied to an outer surface of the energy receiving housing and a cooler in contact with the at least one thermoelectric generator so as to position the thermoelectric generator between the cooler and the energy receiving housing. The method comprises combusting a fuel with a burner, capturing the heat from the burner with the energy receiving housing and generating electricity with a thermoelectric generator applied to the outer surface of the housing between the housing and a cooler.

The present disclosure provides a nozzle structure for a hydrogen gas burner apparatus capable of reducing an amount of generated NOx. A nozzle structure for a hydrogen gas burner apparatus includes an outer tube and an inner tube concentrically disposed inside the outer tube. The inner tube is disposed so that an oxygen-containing gas is discharged from an opened end of the inner tube in an axial direction of the inner tube. The outer tube extends beyond the opened end of the inner tube in the axial direction of the inner tube so that a hydrogen gas passes through a space between an inner circumferential surface of the outer tube and an outer circumferential surface of the inner tube.