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Porto Alegre, Brazil

Stradioto D.A.,APS Engineering | Seelig M.F.,Federal University of Rio Grande do Sul | Schneider P.S.,Federal University of Rio Grande do Sul
Journal of Natural Gas Science and Engineering | Year: 2015

This paper examines the performance of a combined cycle gas turbine plant (CCGT) when integrated to the cold energy released during the regasification process of liquefied natural gas (LNG). A growing number of LNG import terminals supply regasified natural gas for power generation, with an adjacent CCGT plant providing an anchor market for the facility itself. Two integration alternatives with mutual energetic gains are proposed and simulated, and compared to a reference case without any use of the LNG cold potential. The first alternative consists on exchanging heat among LNG and the Brayton cycle air intake. The second alternative adds to the first one a novel recovery opportunity by exchanging heat with the Rankine cycle condenser. On both cases, heat from the CCGT is rejected to a lower temperature level than the one of the regular dead state. From the regasification side, the process is performed without any help of extra external energy. Both integration alternatives led to an electrical efficiency enhancement when comparing to the non-integrated cycle: 6.32% and 9.09%, respectively. The energy return on investment (EROI) of each alternative was also analyzed and gains of 12.92% and 18.57% are predicted by upon the simulation data. © 2015.

A printing system that comprises a media transport system configured to transport media along a media path. A printhead module that has a fluid inlet and spanning the media path. An ink delivery system that provides ink to the printhead module that includes a main ink supply and a buffer tank. A first pressure regulation unit that includes an overflow weir over which fluid flows from a fluid chamber to a sump. The fluid chamber is fluidly coupled to the fluid inlet whereby a height of liquid in the fluid chamber regulates a pressure at the fluid inlet. An ink supply control module coupled to the main ink supply, the buffer tank, and to the pressure regulation unit and controlling fluid flow in fluid paths that includes a first fluid path that supplies ink from the main ink supply to the buffer tank. A second fluid path that supplies ink from the buffer tank to the fluid chamber. A third fluid path that receives ink from the sump and returns the ink to the buffer tank.

Aps Engineering | Date: 2014-10-21

A printing system includes a media transport system configured to transport a web of print media through a printing zone at a transport speed in a transport direction proceeding from up-web to down-web. A plurality of printheads each at least spanning the print zone and each configured to eject a radiation-curable ink. At least one PIN is unit positioned between two of the printheads relative the transport direction and configured to emit radiation onto the print media to partially cure the ink emitted by a printhead that is up-web from the PIN unit. A controller controls a power level of the PIN unit so that the radiative power level of the PIN unit decreases as the transport speed increases.

A printing system that comprises a media transport system for conveying a print media along a media path in a first direction. A plurality of print modules each spanning the print media path along a second direction. Each print module defines a major axis along the second direction. A minor axis that aligns along the first direction and an intermediate axis with each of the print modules. A printhead array that includes printheads spaced from the media path. A fluid regulator portion configured to regulate a fluid pressure in the printhead portion. Each of the print modules are configured to be installed into and removed from the printing system as an integral unit.

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