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An experimental investigation of the heat transfer and energy storage characteristics of a latent heat thermal energy storage system with a vertically-oriented multi-pass tube heat exchanger for domestic hot water applications

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conference contribution
posted on 31.05.2019, 10:39 by Mohamed Fadl, Philip C. Eames
This paper presents the experimental performance analysis of a latent heat energy storage system (LHESS) designed for domestic hot water (DHW) applications. The designed, fabricated and characterised thermal store comprised of a vertically-oriented multi-pass tube heat exchanger in a rectangular cross-section container filled with PCM paraffin RT44HC. The experimental investigation evaluated the heat transfer within the system, measured the transient temperature distribution, determined the cumulative thermal energy stored, charging time and the instantaneous charging power. The experimental work was conducted under controlled experimental conditions using different heat transfer fluid (HTF) inlet temperatures and different volume flow rates for store charging. It was found that during charging process natural convection in the melt played a significant role. Higher HTF inlet temperature during charging significantly decreased store charging time. Increasing HTF inlet temperature from 60 to 70 oC shortened the charging time by 3.5 hours, a further increase to 80 oC decreased melting time by a further 2 hours.

Funding

The authors are grateful to the Engineering and Physical Sciences Research Council (EPSRC) for funding this work through Grant reference EP/N021304/1.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Eurotherm Seminar #112 Advances in Thermal Energy Storage

Citation

FADL, M.S. and EAMES, P.C., 2019. An experimental investigation of the heat transfer and energy storage characteristics of a latent heat thermal energy storage system with a vertically-oriented multi-pass tube heat exchanger for domestic hot water applications. Presented at the Eurotherm Seminar no. 112: Advances in Thermal Energy Storage, Universitat de Lleida, 15-17th May.

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

15/05/2019

Publication date

2019

Notes

This is a conference paper.

ISBN

9788491441557

Language

en

Location

Universitat de Lleida