A flameless industrial air heater comprising: a combustion engine having a drive shaft and a combustion exhaust gas conduit to direct hot exhaust gases away from the engine; a mixing chamber having an air inlet and being in fluid communication with the exhaust gas conduit to mix the hot exhaust gasses with air flowing into the mixing chamber to produce a warmed air stream; and a compressor connected to the drive shaft and being driven thereby, the compressor being downstream of the mixing chamber to receive the warmed air stream and to pressurize the warmed air stream for delivery to applications requiring heating.

A system for treating engine exhaust gas, which engine exhaust gas has a temperature of between T1 and T2, comprises a SCR reactor for converting NOx in a medium containing the engine exhaust gas into N2 and H2O. The SCR reactor has an inlet for receiving the medium and an outlet for outputting the NOx reduced medium. A first boiler unit has an outlet for outputting boiler exhaust gas (temperature greater than T3, T3>T1) from the first boiler unit. A mixing unit mixes the engine exhaust gas with the boiler exhaust gas to produce the medium. The mixing unit has a first inlet communicating with the engine for receiving the engine exhaust gas, a second inlet communicating with the outlet of the first boiler unit for receiving the boiler exhaust gas and an outlet for outputting the medium. The mixing unit outlet communicates with the inlet of the SCR reactor.

An energy recovery device comprising a drive mechanism; an engine comprising a plurality of Shape Memory Alloy (SMA) elements or Negative Thermal Expansion (NTE) elements fixed at a first end by a holder element and connected at a second end to a drive mechanism wherein Shape Memory Alloy (SMA) elements or Negative Thermal Expansion (NTE) elements are positioned to from a gap between adjacent elements and configured to improve heat transfer from a fluid to each element.

A heat exchanger comprises a plurality of heat exchange segments juxtaposed in a housing, and a plug member connected fluid-tightly to the housing, and supporting the heat exchange segments to provide a coolant or cooling medium passage in each gap between the heat exchange segments adjacent to each other. Each heat exchange segment comprises a case having an opening only on a surface of the case, at least outside of the opening being plugged fluid-tightly by the plug member, and a guide member, e.g., fin accommodated in the case, and provided with a plurality of passages allowing only gas flow in a predetermined direction, and gas intake passages and gas exhaust passages at the upstream and downstream thereof, wherein an opening of the case is provided with a gas inlet port communicated with the gas intake passage, and a gas outlet port communicated with the gas exhaust passages.

A heat exchanger comprises a plurality of heat exchange segments juxtaposed in a housing, and a plug member connected fluid-tightly to the housing, and supporting the heat exchange segments to provide a coolant or cooling medium passage in each gap between the heat exchange segments adjacent to each other. Each heat exchange segment comprises a case having an opening only on a surface of the case, at least outside of the opening being plugged fluid-tightly by the plug member, and a guide member, e.g., fin accommodated in the case, and provided with a plurality of passages allowing only gas flow in a predetermined direction, and gas intake passages and gas exhaust passages at the upstream and downstream thereof, wherein an opening of the case is provided with a gas inlet port communicated with the gas intake passage, and a gas outlet port communicated with the gas exhaust passages.

A power system including a variable volume combustion chamber for a two-stroke engine having a controlled exhaust port, a fuel injector to the combustion chamber and an oxygen injector to the combustion chamber. The oxygen injector provides repeated oxygen injection pulses to complete a charge. The controlled exhaust port includes an oscillating rotatably mounted valve. A source of pressurized concentrated oxygen to the oxygen injector is in a closed case having a ceramic fiber membrane. An air inlet and a waste outlet are in communication with a first side of the ceramic fiber membrane. An oxygen outlet is in communication with a second side of the ceramic fiber Ionic transport membrane. The case has a heat transfer surface in communication with the controlled exhaust port from the combustion chamber.

A thermoelectric generator includes a first channel for passing a warm fluid along a direction of flow, a second channel for passing a cold fluid, a plurality of thermocouple elements disposed along the direction of flow between the first and second channels, a first member includes portions disposed between the elements and the first channel and associated with the individual elements for providing a heat coupling between the associated element and the first channel, and a second member including portions disposed between the elements and the second channel and associated with the individual elements for providing a heat coupling between the associated element and the second channel. The sum of the thermal resistances of those portions that are associated with a first element positioned upstream of a second element is bigger than the sum of the thermal resistances of those portions that are associated with the second element.

An integrated internal combustion engine and waste heat recovery system including an internal combustion engine, a system of exhaust gas conduits, a first heat exchanger in fluid communication with the exhaust gas conduits, a second heat exchanger in fluid communication with the exhaust gas conduits downstream of the first exchanger, a selective catalytic reduction unit positioned between the first and second heat exchangers, a waste heat recover system (WHR) and a mechanical connection. The WHR system includes a system of working fluid conduits in fluid communication with the first and second heat exchangers, an expander, a condenser, and a pump. The mechanical connection connects the internal combustion engine and the expander. The heat exchangers are configured to facilitate thermal communication between the working fluid and exhaust gas conduits. The working fluid and exhaust gas conduits include bypass conduits around the heat exchangers.

A system includes an exhaust passage and a waste heat recovery system. The exhaust passage is structured to fluidly couple to an exhaust manifold of an engine, and to receive exhaust gas from the engine. The waste heat recovery system includes a working fluid circuit, a superheater, and an expander. The working fluid circuit includes a pump to circulate a working fluid through the working fluid circuit, including through the engine. Heat is transferred from the engine to the working fluid. The superheater is positioned along the working fluid circuit downstream of the engine. The superheater is fluidly coupled to the exhaust passage and transfers heat from the exhaust gas to the working fluid. The expander is positioned along the working fluid circuit downstream of the superheater. The expander generates useful energy from the heat transferred to the working fluid from the exhaust gas and the engine.

A system includes an exhaust passage and a waste heat recovery system. The exhaust passage is structured to fluidly couple to an exhaust manifold of an engine, and to receive exhaust gas from the engine. The waste heat recovery system includes a working fluid circuit, a superheater, and an expander. The working fluid circuit includes a pump to circulate a working fluid through the working fluid circuit, including through the engine. Heat is transferred from the engine to the working fluid. The superheater is positioned along the working fluid circuit downstream of the engine. The superheater is fluidly coupled to the exhaust passage and transfers heat from the exhaust gas to the working fluid. The expander is positioned along the working fluid circuit downstream of the superheater. The expander generates useful energy from the heat transferred to the working fluid from the exhaust gas and the engine.