Patent SG-11201910083R-A (SG)
Title: Method and system for efficient nonsynchronous lng production using large scale multi-shaft gas tusbines
Inventor: GUY ASHLEY R
IPC: F25J1/00
Filed: 2018-03-23
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 22 November 2018 (22.11.2018) WIPO I PCT 011101010 VIII OH o 10010111 VIII OH mil 0111110 111110 oimIE (10) International Publication Number WO 2018/212830 Al (51) International Patent Classification: F25J 1/00 (2006.01) F25J 1/02 (2006.01) (21) International Application Number: PCT/US2018/024037 (22) International Filing Date: 23 March 2018 (23.03.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/506,922 16 May 2017 (16.05.2017) US 62/570,998 11 October 2017 (11.10.2017) US (71) Applicant: EXXONMOBIL UPSTREAM RESEARCH COMPANY [US/US]; (EMHC-E2-4A-296), 22777 Springwoods Village Parkway, Spring, TX 77389 (US). (72) Inventors; and (71) Applicants (for US only): GUY, Ashley R. [US/US]; 1302 Waugh Drive #732, Houston, TX 77019 (US). LUPASCU, Sorin T. [US/US]; 6610 Pelham Chase Drive, Spring, TX 77389 (US). PARKER, Donna J. [US/US]; 103 Trinity Oaks Circle, The Woodlands, TX 77381 (US). LEE, Yow- Yeen [MY/US]; 39 Pebble Cove Drive, The Woodlands, TX 77381 (US). (74) Agent: JENSEN, Nathan 0. et al.; Exxonmobil Upstream Research Company, (EMHC-E2-4A-296), 22777 Spring- woods Village Parkway, Spring, TX 77389 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (54) Title: METHOD AND SYSTEM FOR EFFICIENT NONSYNCHRONOUS LNG PRODUCTION USING LARGE SCALE = MULTI-SHAFT GAS TUSBINES 400 402 \s„ .. 442 412 422 432 404 444 414 424 434 406 l y 446 416 426 436 FIG. 4 cc 00 O O (57) : A drive system for liquefied natural gas (LNG) refrigeration compressors in a LNG liquefaction plant. Each of three refrigeration compression strings include refrigeration compressors and a multi-shaft gas turbine capable of non-synchronous operation. The multi- shaft gas turbine is operationally connected to the refrigeration compressors and is configured to drive the one or more refrigeration compressors. The multi-shaft gas turbine uses its inherent speed turndown range to start the one or more refrigeration compressors from rest, bring the one or more refrigeration compressors up to an operating rotational speed, and adjust compressor operating points to maximize efficiency of the one or more refrigeration compressors, without assistance from electrical motors with drive-through capability and variable frequency drives. [Continued on next page] WO 2018/212830 Al MIDEDIMOMOIDEIRDERIHIllfilinlIONVOIMIE MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(11)) as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) Published: — with international search report (Art. 21(3))