US 12,066,154 B2
Recompressed transcritical cycle with vaporization in cryogenic or low-temperature applications, and/or with coolant fluid
Massimiliano Sbarsi, San Donato Milanese (IT); Lucio Aurilio, San Donato Milanese (IT); Anton Marco Fantolini, San Donato Milanese (IT); and Salvatore De Rinaldis, San Donato Milanese (IT)
Assigned to SAIPEM S.P.A., San Donato Milanese (IT)
Appl. No. 17/598,773
Filed by SAIPEM S.P.A., San Donato Milanese (IT)
PCT Filed Mar. 18, 2020, PCT No. PCT/IB2020/052455
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/201871, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 102019000004727 (IT), filed on Mar. 29, 2019.
Prior Publication US 2022/0186884 A1, Jun. 16, 2022
Int. Cl. F17C 9/02 (2006.01); F17C 5/06 (2006.01)
CPC F17C 9/02 (2013.01) [F17C 5/06 (2013.01); F17C 2221/033 (2013.01); F17C 2223/0161 (2013.01); F17C 2223/033 (2013.01); F17C 2227/0135 (2013.01); F17C 2227/0323 (2013.01); F17C 2227/0327 (2013.01); F17C 2227/0362 (2013.01); F17C 2260/046 (2013.01); F17C 2265/05 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A process for regasifying a fluid and generating electrical energy, said process comprising subjecting a flow of an operating fluid to the following steps:
1) pumping, said pumping step comprising a low pressure pumping step 1a) using a low-pressure pump and a high pressure pumping step 1b) using a high-pressure pump,
2) heating in a recuperator, thus obtaining a heated flow, said heating step comprising a low temperature heat recovery step 2a), thus obtaining a first heated flow, and a high temperature heat recovery step 2b), thus obtaining a second heated flow,
3) further heating through a high temperature source, thus obtaining a further heated flow,
4) expanding in a turbine, with generation of electrical energy, thus obtaining an expanded flow,
5) cooling in a heat recuperator by heat exchange, in a step 5a) with the second heated flow of step 2b), and in a step 5b) with the first heated flow of step 2a), thus obtaining a cooled flow, and
6) condensing said cooled flow of said operating fluid to regasify said operating fluid,
wherein after the low pressure pumping step 1a), a portion of the flow of said operating fluid output from the low-pressure pump is subjected to a recompression step, thus obtaining a flow which is combined with the first heated flow of the operating fluid obtained from step 2a).