Patent SG-11201909695X-A (SG)
Title: Water recovery in desiccant enhanced evaporative cooling systems
Inventor: LEPOUDRE PHILIP PAUL
IPC: F24F5/00
Filed: 2017-04-18
Abstract: Tank A A -- — System Controller 32 FIG. 1 Outdoor E —> Air y-24 24- N _ Tank Concentration C3 52 12- N Air i 4 Inlet Concentratio n C2 42 34 Desiccant Dryer LAMEE Concentration C1 66 76 y-71 x 72 Regenerator Energy Input 30Y Distilled Water External 74 78 73 Water Supply 30 y-14 is* Air Outet 20 30 10 -' • • • EC 68 28 24 26- f6 66 70 36 1-1 N 1-1 1-1 00 1-1 O (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 25 October 2018 (25.10.2018) WIP0 I PCT IiiimmoimiolollmonolomomimolmonlmovoimIE (10) International Publication Number WO 2018/191807 Al (51) International Patent Classification: F24F 5/00 (2006.01) F25B 15/14 (2006.01) F24F 12/00 (2006.01) F25B 19/00 (2006.01) (21) International Application Number: PCT/CA2017/050480 (22) International Filing Date: 18 April 2017 (18.04.2017) (25) Filing Language: English (26) Publication Language: English (71) Applicant: NORTEK AIR SOLUTIONS CANADA, INC. [CA/CA]; 1502D Quebec Avenue, Saskatoon, Saskatchewan S7K 1V7 (CA). (72) Inventor: LEPOUDRE, Philip Paul; 153 Mount Allison Crescent, Saskatoon, Saskatchewan S7H 4A4 (CA). (74) Agent: SMART & BIGGAR; 900 - 55 Metcalfe Street, Ot- tawa, Ontario K11 3 6L5 (CA). (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, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 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, (54) Title: WATER RECOVERY IN DESICCANT ENHANCED EVAPORATIVE COOLING SYSTEMS (57) : Disclosed are systems and methods for conditioning air for an enclosed space using a liquid to air membrane energy exchanger (LAMEE) as a pre-dryer for removing moisture from an air stream with a desiccant flowing through the LAMEE. The LAMEE can be arranged inside a plenum configured to receive and condition an air stream. The LAMEE can be used in combination with a regeneration system to recover water from the dilute desiccant exiting the LAMEE for use as make up water for one or more evaporative coolers in the conditioning system. This can reduce or eliminate an external water supply for operation of the one or more evaporative coolers. The conditioning system can operate effectively with only a portion of the dilute desiccant being regenerated. In an example, a mixing tank can be used to mix the dilute desiccant (exiting the LAMEE) with a concentrated desiccant stream from regeneration. [Continued on next page] WO 2018/191807 Al MIDEDIMOMMIDIREIDIMICIMMENHINVOIMIE 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). Published: — with international search report (Art. 21(3))