	US 11,840,931 B2
	Recompressed transcritical cycle with post-expanding in criogenic- or low-temperature applications, and/or with coolants
Salvatore De Rinaldis, San Donato Milanese (IT); Massimiliano Sbarsi, San Donato Milanese (IT); Lucio Aurilio, San Donato Milanese (IT); and Anton Marco Fantolini, San Donato Milanese (IT)
Assigned to SAIPEM S.P.A., San Donato Milanese (IT)
Appl. No. 17/599,764
Filed by SAIPEM S.P.A., San Donato Milanese (IT)
PCT Filed Mar. 19, 2020, PCT No. PCT/IB2020/052524 § 371(c)(1), (2) Date Sep. 29, 2021, PCT Pub. No. WO2020/201877, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 102019000004733 (IT), filed on Mar. 29, 2019.
Prior Publication US 2022/0154593 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F01D 15/10 (2006.01); F01D 25/10 (2006.01)

CPC F01D 15/10 (2013.01) [F01D 25/10 (2013.01)]

9 Claims

1. A process for regasifying a fluid and producing electrical energy, said process comprising subjecting a flow of a working fluid to the steps of:

1) high-pressure pumping,

2) heating in a recovery unit, thus obtaining a heated flow, said heating step comprising a low-temperature heat recovery step 2a) and a high-temperature heat recovery step 2b),

3) further heating, thus obtaining a further heated flow,

4) expanding in a turbine, with production of electrical energy, thus obtaining an expanded flow,

5) cooling in a recovery unit by heat exchange, in a step 5a) with the flow of step 2b) and in a step 5b) with the flow of step 2a), thus obtaining a cooled flow,

6) expanding with production of mechanical energy, and

7) condensing said flow of the working fluid and regasifying said flow,

wherein, after step 5), a portion of the flow of said working fluid is not subjected to step 6) but is subjected to a recompressing step.