Title: Energy and exergy analysis of a novel multi-fluid heat exchanger for sustainable space and water heating application

Authors: Belal Almasri; Taraprasad Mohapatra; Sudhansu S. Mishra

Addresses: Department of Mechanical Engineering, C.V. Raman Global University, Bhubaneswar, India ' Department of Mechanical Engineering, C.V. Raman Global University, Bhubaneswar, India ' Department of Mechanical Engineering, Government College of Engineering, Keonjhar, India

Abstract: The novel multi-fluid heat exchanger (NMFHE) is a modified double-tube exchanger, tested under various flow rates, temperatures, and flow configurations. The overall heat transfer coefficient (U_o), effectiveness, Colburn factor (j), JF factor, exergy efficiency, and sustainability index (SI) are determined as the thermal and sustainability parameters for this study. The maximum (U_o of 276.1 W/m².K and 22.03 W/m².K are observed at 300 LPH flow rate, 80°C inlet temperature of HF1, and CF1 configurations. The maximum (j, JF factor, exergy efficiency, and SI were 0.006, 0.08, 0.785, and 4.066, respectively, at 100 LPH flow rate and 60°C inlet temperature of HF1.

Keywords: multi-fluid; brazed helix tube; BHT; heat transfer; exergy efficiency; sustainability index.

DOI: 10.1504/IJEX.2024.140179

International Journal of Exergy, 2024 Vol.44 No.3/4, pp.293 - 310

Received: 25 Jun 2023
Accepted: 13 Feb 2024
Published online: 27 Jul 2024 *

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