(19)
(11) EP 4 814 378 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.10.2026 Bulletin 2026/43

(43) Date of publication A2:
30.09.2026 Bulletin 2026/40

(21) Application number: 26167555.7

(22) Date of filing: 25.03.2026
(51) International Patent Classification (IPC): 
F22B 1/16(2006.01)
F22B 1/18(2006.01)
F22B 29/02(2006.01)
F22G 3/00(2006.01)
F28D 1/02(2006.01)
F22G 1/00(2006.01)
 F22B 1/02(2006.01)
F22B 15/00(2006.01)
F22D 1/00(2006.01)
F25B 39/02(2006.01)
F22D 1/20(2006.01)
(52) Cooperative Patent Classification (CPC):
F22B 1/16; F22B 15/00; F22B 29/023; F22G 1/00; F22D 1/20; F22B 1/021; F22D 1/006; F22G 3/006; F25B 39/02; F28D 1/02; F22B 1/1884; F28B 1/02; F28D 21/0017; F28D 9/0093; F28D 2021/0064; F28D 7/1607; F28F 2009/226; F28D 2021/0071; F28D 7/0066; F28D 7/0075; F28D 9/0006; F28D 7/163; F28B 9/08; F28D 7/16; F28D 7/0091; F28D 2021/0066; F25B 2339/0242; F25B 2339/046; F25B 2339/047; F25B 30/02; F25B 2400/13; F25B 2339/0241; F25B 25/005
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH LA MA MD TN

(30) Priority: 25.03.2025 IN 202541028193
25.03.2025 IN 202541028191

(71) Applicant: Trane International Inc.
Davidson, NC 28036 (US)

(72) Inventors:
  • SUBRAHMANYA, Praveena Alangar
    Davidson, North Carolina, 28036 (US)
  • G, Venkatesh
    Davidson, North Carolina, 28036 (US)
  • DINGEL, Benjamin Elias
    Davidson, North Carolina, 28036 (US)
  • V, Yadunandan
    Davidson, North Carolina, 28036 (US)

(74) Representative: Haseltine Lake Kempner LLP 
One Portwall Square Portwall Lane
Bristol BS1 6BH
Bristol BS1 6BH (GB)

   


(54) STEAM GENERATION UNIT USING A HEAT EXCHANGER


(57) A steam generation unit includes a heat exchanger that has a shell, end plates for receiving a process fluid in a volume defined by the shell and the end plates, and channels for a working fluid. The shell and the channels define at least a first heat exchange zone, a second heat exchange zone, and a third heat exchange zone each having a respective pass of the channels for preheating the process fluid, for boiling the process fluid, and for superheating the process fluid, respectively. The process fluid is heated sequentially from the first to the second to the third heat exchange zone. A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a refrigerant circuit with a compressor, a steam generation unit, an expander, and an evaporator fluidly connected.







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Search report