Abstract: A piston crown for a combustion system is disclosed. The piston crown includes a piston bowl having a circumferential recess and a plurality of first recesses arranged spaced apart from each other along a circumferential direction. The circumferential recess is disposed proximate to a circumference of the piston crown. Each recess of the plurality of the first recesses extends between a center of the piston crown and the circumferential recess, and a width and a depth of each recess of the plurality of first recesses are extended along a radial direction for an entire length of each recess of the plurality of first recesses.

Abstract: A piston crown for a combustion system is disclosed. The piston crown includes a piston bowl having a circumferential recess and a plurality of first recesses arranged spaced apart from each other along a circumferential direction. The circumferential recess is disposed proximate to a circumference of the piston crown. Each recess of the plurality of the first recesses extends between a center of the piston crown and the circumferential recess, and a width and a depth of each recess of the plurality of first recesses are extended along a radial direction for an entire length of each recess of the plurality of first recesses.

Abstract: A piston crown for a combustion system is disclosed. The piston crown includes a piston bowl having a circumferential recess and a plurality of first recesses arranged spaced apart from each other along a circumferential direction. The circumferential recess is disposed proximate to a circumference of the piston crown. Each recess of the plurality of the first recesses extends between a center of the piston crown and the circumferential recess, and a width and a depth of each recess of the plurality of first recesses are extended along a radial direction for an entire length of each recess of the plurality of first recesses.

Abstract: A piston crown for a combustion system is disclosed. The piston crown includes a piston bowl having a circumferential recess and a plurality of first recesses arranged spaced apart from each other along a circumferential direction. The circumferential recess is disposed proximate to a circumference of the piston crown. Each recess of the plurality of the first recesses extends between a center of the piston crown and the circumferential recess, and a width and a depth of each recess of the plurality of first recesses are extended along a radial direction for an entire length of each recess of the plurality of first recesses.

Abstract: A piston crown for a combustion system is disclosed. The piston crown includes a piston bowl having a circumferential recess and a plurality of first recesses arranged spaced apart from each other along a circumferential direction. The circumferential recess is disposed proximate to a circumference of the piston crown. Each recess of the plurality of the first recesses extends between a center of the piston crown and the circumferential recess, and a width and a depth of each recess of the plurality of first recesses are extended along a radial direction for an entire length of each recess of the plurality of first recesses.

Abstract: A piston crown for a combustion system is disclosed. The piston crown includes a piston bowl having a circumferential recess and a plurality of first recesses arranged spaced apart from each other along a circumferential direction. The circumferential recess is disposed proximate to a circumference of the piston crown. Each recess of the plurality of the first recesses extends between a center of the piston crown and the circumferential recess, and a width and a depth of each recess of the plurality of first recesses are extended along a radial direction for an entire length of each recess of the plurality of first recesses.

Abstract: A coal gasifier is retrofitted to achieve multiple advantages such as reduced oxygen consumption, reduced CO2 and NOx emissions, better H:C ratio, better carbon conversion etc. This is achieved by dividing the coal into at least two zones and modifying the gasifier and operating it as described. The coal is injected into a first zone, configured to devolatilize a substantial portion of the injected coal to produce coal char and volatiles. The operation is tuned to substantially consume the oxidant injected in the first zone. A low-calorific-value, high oxidant feedstock is injected in second zone of the gasifier. The devolatilization of the low-calorific-value, high oxidant content feedstock provides the oxygen containing compounds which gasify at least a portion of the coal char generated in the first zone.

Abstract: A coal gasifier is retrofitted to achieve multiple advantages such as reduced oxygen consumption, reduced CO2 and NOx emissions, better H:C ratio, better carbon conversion etc. This is achieved by dividing the coal into at least two zones and modifying the gasifier and operating it as described. The coal is injected into a first zone, configured to devolatilize a substantial portion of the injected coal to produce coal char and volatiles. The operation is tuned to substantially consume the oxidant injected in the first zone. A low-calorific-value, high oxidant feedstock is injected in second zone of the gasifier. The devolatilization of the low-calorific-value, high oxidant content feedstock provides the oxygen containing compounds which gasify at least a portion of the coal char generated in the first zone.

Abstract: A coal gasifier is retrofitted to achieve multiple advantages such as reduced oxygen consumption, reduced CO2 and NOx emissions, better H:C ratio, better carbon conversion etc. This is achieved by dividing the coal into at least two zones and modifying the gasifier and operating it as described. The coal is injected into a first zone, configured to devolatilize a substantial portion of the injected coal to produce coal char and volatiles. The operation is tuned to substantially consume the oxidant injected in the first zone. A low-calorific-value, high oxidant feedstock is injected in second zone of the gasifier. The devolatilization of the low-calorific-value, high oxidant content feedstock provides the oxygen containing compounds which gasify at least a portion of the coal char generated in the first zone.

Abstract: A method of operating a gasifier is provided that envisions dividing the gasifier into multiple zones. A high-calorific-value feedstock with an oxidant is injected in the first zone. The gasifier is operated to substantially consume the oxidant within the first gasification zone. The method of operating the gasifier further includes injecting a low-calorific-value, high-oxygen-content feedstock in a second gasification zone. The low-calorific-value, high-oxygen-content feedstock is devolatilized and gasified in second zone. A method of operation provides for a synergistic co-gasification of the high-calorific-value feedstock and the low-calorific-value, high oxidant content feedstock. The method provides for specific control actions that enable operation of multi-fuel, multizone gasifier.

Abstract: A gas evolving bipolar electrolysis system is provided which includes multiple cells. Each cell further includes a cathode, an anode, at least one inlet and at least one outlet for flow of electrolyte and the cathode and the anode are configured to maintain a variable interelectrode gap between the cathode and the anode. In some embodiments, the cell includes a membrane disposed between the electrodes and in some other embodiments the electrodes are coated with electrocatalysts configured to provide uniform current density on the electrode surface.

Abstract: A coal gasifier is retrofitted to achieve multiple advantages such as reduced oxygen consumption, reduced CO2 and NOx emissions, better H:C ratio, better carbon conversion etc. This is achieved by dividing the coal into at least two zones and modifying the gasifier and operating it as described. The coal is injected into a first zone, configured to devolatilize a substantial portion of the injected coal to produce coal char and volatiles. The operation is tuned to substantially consume the oxidant injected in the first zone. A low-calorific-value, high oxidant feedstock is injected in second zone of the gasifier. The devolatilization of the low-calorific-value, high oxidant content feedstock provides the oxygen containing compounds which gasify at least a portion of the coal char generated in the first zone.

Abstract: A method of operating a gasifier is provided that envisions dividing the gasifier into multiple zones. A high-calorific-value feedstock with an oxidant is injected in the first zone. The gasifier is operated to substantially consume the oxidant within the first gasification zone. The method of operating the gasifier further includes injecting a low-calorific-value, high-oxygen-content feedstock in a second gasification zone. The low-calorific-value, high-oxygen-content feedstock is devolatilized and gasified in second zone. A method of operation provides for a synergistic co-gasification of the high-calorific-value feedstock and the low-calorific-value, high oxidant content feedstock. The method provides for specific control actions that enable operation of multi-fuel, multizone gasifier.

Abstract: A gasifier is provided gasify multiple fuels. The gasifier is configured to include a first gasification zone for gasifying a high-calorific-value feedstock with an oxidant. The gasifier is configured to substantially consume the oxidant within the first gasification zone. The gasifier further includes a second gasification zone for gasifying a low-calorific-value, high-oxygen-content feedstock. The high-calorific-value fuel may be coal and the low-calorific-value fuel may be biomass.

Abstract: An apparatus is provided that includes a housing having an interior surface defining a volume, and an air inlet and an air outlet through which the volume is in fluid communication with the ambient environment. The apparatus includes a plurality of electrodes including at least one emitter electrode and at least one attracting electrode, and the plurality of electrodes are in fluid communication with the air inlet. The apparatus can include a potential generating device capable of applying a potential across the plurality of electrodes sufficient to cause a corona current between the at least one emitter electrode and the at least one attracting electrode. The corona current imparts momentum to surrounding gaseous atoms and molecules. The momentum results in a net fluid flow towards and through the one air inlet. And, the apparatus can still further include a fuel cell disposed within the volume and configured to receive the net fluid flow.

Abstract: A gas evolving bipolar electrolysis system is provided which includes multiple cells. Each cell further includes a cathode, an anode, at least one inlet and at least one outlet for flow of electrolyte and the cathode and the anode are configured to maintain a variable interelectrode gap between the cathode and the anode. In some embodiments, the cell includes a membrane disposed between the electrodes and in some other embodiments the electrodes are coated with electrocatalysts configured to provide uniform current density on the electrode surface.