The experimental evaluation and improvements of a novel thermal diode pre-heatsolar water heater under simulated solar conditions

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Abstract

This paper presents the development through experimental performance characterisation of a pre-heat Integrated Collector Storage Solar Water Heater using a novel thermal diode operation to reduce ambient heat loss during non-collection periods. Using a solar simulator facility at Ulster University, the novel prototype pre-heat Mark IV unit was tested and evaluated. The concept has been designed and developed to be a sustainable pre-heat alternative to other types of solar water heating systems traditionally used in domestic hot water installations. The highest 6 hour collection efficiency was 36.17% under solar simulated conditions. The lowest system 'U' value was 0.98 Wm-2K-1 with no draw-off conditions. When the current prototype ICS units are compared with other conventional ICS systems, particularly in terms of thermal retention during non-collection periods, an improved performance is clearly demonstrated. The measured thermal losses were approximately 40% less than other similarly measured systems
LanguageEnglish
PagesNA
JournalRenewable Energy
VolumeNA
Early online date29 Dec 2017
DOIs
Publication statusE-pub ahead of print - 29 Dec 2017

Fingerprint

Water heaters
Diodes
Solar water heaters
Heat losses
Hot Temperature
Water
Simulators
Heating

Keywords

  • ICSSWH
  • pre-heat
  • solar simulation
  • thermal diode

Cite this

@article{f5297a0c44d64b999d691aef2ca4e3e2,
title = "The experimental evaluation and improvements of a novel thermal diode pre-heatsolar water heater under simulated solar conditions",
abstract = "This paper presents the development through experimental performance characterisation of a pre-heat Integrated Collector Storage Solar Water Heater using a novel thermal diode operation to reduce ambient heat loss during non-collection periods. Using a solar simulator facility at Ulster University, the novel prototype pre-heat Mark IV unit was tested and evaluated. The concept has been designed and developed to be a sustainable pre-heat alternative to other types of solar water heating systems traditionally used in domestic hot water installations. The highest 6 hour collection efficiency was 36.17{\%} under solar simulated conditions. The lowest system 'U' value was 0.98 Wm-2K-1 with no draw-off conditions. When the current prototype ICS units are compared with other conventional ICS systems, particularly in terms of thermal retention during non-collection periods, an improved performance is clearly demonstrated. The measured thermal losses were approximately 40{\%} less than other similarly measured systems",
keywords = "ICSSWH, pre-heat, solar simulation, thermal diode",
author = "Mervyn Smyth and Patrick Quinlan and Mondol, {Jayanta Deb} and Aggelos Zacharopoulos and Dominic McLarnon and Adrian Pugsley",
year = "2017",
month = "12",
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doi = "10.1016/j.renene.2017.12.083",
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journal = "Renewable Energy",
issn = "0960-1481",
publisher = "Elsevier",

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T1 - The experimental evaluation and improvements of a novel thermal diode pre-heatsolar water heater under simulated solar conditions

AU - Smyth, Mervyn

AU - Quinlan, Patrick

AU - Mondol, Jayanta Deb

AU - Zacharopoulos, Aggelos

AU - McLarnon, Dominic

AU - Pugsley, Adrian

PY - 2017/12/29

Y1 - 2017/12/29

N2 - This paper presents the development through experimental performance characterisation of a pre-heat Integrated Collector Storage Solar Water Heater using a novel thermal diode operation to reduce ambient heat loss during non-collection periods. Using a solar simulator facility at Ulster University, the novel prototype pre-heat Mark IV unit was tested and evaluated. The concept has been designed and developed to be a sustainable pre-heat alternative to other types of solar water heating systems traditionally used in domestic hot water installations. The highest 6 hour collection efficiency was 36.17% under solar simulated conditions. The lowest system 'U' value was 0.98 Wm-2K-1 with no draw-off conditions. When the current prototype ICS units are compared with other conventional ICS systems, particularly in terms of thermal retention during non-collection periods, an improved performance is clearly demonstrated. The measured thermal losses were approximately 40% less than other similarly measured systems

AB - This paper presents the development through experimental performance characterisation of a pre-heat Integrated Collector Storage Solar Water Heater using a novel thermal diode operation to reduce ambient heat loss during non-collection periods. Using a solar simulator facility at Ulster University, the novel prototype pre-heat Mark IV unit was tested and evaluated. The concept has been designed and developed to be a sustainable pre-heat alternative to other types of solar water heating systems traditionally used in domestic hot water installations. The highest 6 hour collection efficiency was 36.17% under solar simulated conditions. The lowest system 'U' value was 0.98 Wm-2K-1 with no draw-off conditions. When the current prototype ICS units are compared with other conventional ICS systems, particularly in terms of thermal retention during non-collection periods, an improved performance is clearly demonstrated. The measured thermal losses were approximately 40% less than other similarly measured systems

KW - ICSSWH

KW - pre-heat

KW - solar simulation

KW - thermal diode

U2 - 10.1016/j.renene.2017.12.083

DO - 10.1016/j.renene.2017.12.083

M3 - Article

VL - NA

SP - NA

JO - Renewable Energy

T2 - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

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