Abstract:
A system is disclosed that provides at least two turboexpanders operatively linked to a generator that generates electrical power from the reduction of the pressure of a natural gas stream wherein the system reduces the pressure of the natural gas stream in at least two pressure reduction stages, and wherein heat is added to the natural gas stream by the system to adjust the temperature before each pressure reduction stage. The generator can be a permanent magnet generator.
Abstract:
Bei einer Vorrichtung (1) zur Erzeugung elektrischer Energie strömt ein Druckfluid (6) aus einem Druckfluid-Behälter (5) zu einer Turbine-Generator-Einheit (3), die elektrische Energie erzeugt. Das Druckfluid (6) kühlt sich beim Ausströmen ab, so dass der mindestens eine thermoelektrische Generator (16) aus einer Temperaturdifferenz (ΔT) zwischen der Temperatur (T 2 ) des ausströmenden Druckfluids (6) und einer Umgebungstemperatur (T 0 ) elektrische Energie erzeugt. Die Vorrichtung (1) ermöglicht auf einfache, effiziente, zuverlässige und flexible Weise die Erzeugung elektrischer Energie mittels eines Druckfluids (6).
Abstract:
Compressed Air Energy Storage System or Other System with Cold Storage An energy storage apparatus comprises a compressor arrangement configured to compress air or other process gas and to supply the compressed air or other process gas to a compressed gas store; an expander arrangement configured to expand the air or other process gas from the compressed gas store; a first heat transfer device associated with the expander arrangement; a thermal store including a thermal storage medium; and a second heat transfer device associated with the compressor arrangement. The first heat transfer device is configured to transfer heat to the air or other process gas which has passed through the expander arrangement from the thermal storage medium, the transfer producing a reduction in the thermal energy of the thermal storage medium in order to store cold in the thermal store. The second heat transfer device is configured to transfer heat between the thermal storage medium and the air or other process gas before the air or other process gas is stored in the compressed gas store, the transfer producing an increase of the thermal energy of the thermal storage medium. The thermal store is configured to store cold such that the temperature of the thermal storage medium in use is below ambient temperature. The thermal transfer fluid and/or the thermal storage medium may be a phase change material.
Abstract:
The present invention relates to a heater suitable for heating a flow of natural gas. There is provided a heater (1) suitable for heating a flow of natural gas, comprising a vessel (2) containing a heat transfer fluid, a heat source tube (3) passing through the vessel and being at least partially immersed in the heat transfer fluid, the heat source tube (3) being suppliable with heated gas to allow the heated gas to flow along the heat source tube (3) to evaporate the heat transfer fluid and at least one heat exchanger being connectable to a source of second fluid (9) to be heated, the heat exchanger being arranged so that the second fluid can be heated by the evaporated heat transfer fluid.
Abstract:
A method and an apparatus (100) for reducing the pressure of a natural gas (2) at a wellhead of a natural gas field. The method provides prearranging an energy recovery expansion device (20), which comprises a stator and a rotor mechanically connected with a power generator (29), and a gas passageway between the rotor and the stator, and conveying the natural gas into the passageway of the energy recovery expansion device (24) to cause a rotation of the rotor and the expansion of the gas, the pressure being reduced from the extraction pressure (Pi) to the use pressure (Pa), which makes it possible to obtain an electric power (W) during the expansion, adapted to satisfy the energy requirements of the gas extraction unit, in particular of an offshore platform, without installing local electric generators. In order to allow a reliable operation of a recovery expansion device, such as a turbine, a means is provided for finely separating solid and liquid matter present in the gas, as well as a means (7) for conditioning the gas entering the expansion device, which may comprise a feeding means (12) of an additive into the gas (3), said additive adapted to decrease the formation temperature of the solid, and, in an advantageous way in case of higher amount of water, a means for heating the gas such that the temperature is maintained above the formation temperature of the solid.
Abstract:
The present invention relates to flowing LNG revaporization equipment. The flowing LNG revaporization equipment comprises an LNG storage tank (10) and an LNG revaporizer (20), wherein the flowing LNG revaporization equipment further comprises power generation equipment which is capable of generating power, as well as generating gas through the LNG revaporizer (20). Accordingly, since a gas turbine generator which is a power generating equipment to generate power is additionally included in the revaporization equipment to revaporize LNG, more specifically, it is possible to supply gas and electricity at the same time. Also, since it is possible to drive the gas turbine generator with gas generated from the revaporization equipment, a compressor for processing gas is removed from the gas turbine generator, so that it is possible to reduce the cost for installing the gas turbine generator. In addition, after vapor is generated using exhaust gas which is generated from the gas turbine generator, the generated gas can be used as the driving power for the LNG revaporizer and a steam turbine generator which is additionally included to generate electricity. Thus, it is possible to minimize the energy required for the entire equipment according to waste heat recovery, so that it is possible to reduce the cost and to prevent oceanic pollution through the usage of waste heat.