TY - JOUR
T1 - Experimental study of heat retention performance of thermal diode Integrated Collector Storage Solar Water Heater (ICSSWH) configurations
AU - Muhumuza, Ronald
AU - Zacharopoulos, A
AU - Mondol, Jayanta
AU - Smyth, Mervyn
AU - Pugsley, Adrian
N1 - Author manuscript was uploaded as a Word file so converted to PDF and re-uploaded.
PY - 2019/8/31
Y1 - 2019/8/31
N2 - Integrated Collector Storage Solar Water Heaters (ICSSWHs) can support growing hot water demands of off-grid populations and reduce harm to human health and the environment. Despite their simple design and fewer associated components, stored thermal energy dissipates easily in foul weather. While thermal diodes are beneficial heat retention enhancement features in ICSSWHs, other simple additional strategies can enhance heat retention without significantly complicating the fabrication process. This article examines techniques of differing levels of complexity for the improvement of heat retention of a basic thermal diode ICSSWH. A basic thermal diode ICSSWH is adapted into a scalable Asymmetric Formed Reflector with Integrated Collector and Storage (AFRICaS) system and tested for heat retention performance along with other thermal insulation measures. The AFRICaS system improves heat retention efficiency and reduces heat loss coefficient to at least 35% and 1.46 W/K respectively. These results contrast with a heat retention efficiency and heat loss coefficient of 20% and 2.25 W/K respectively for a basic thermal diode ICSSWH. The AFRICaS prototype is potential launchpad for sustainable solar energy cogeneration.
AB - Integrated Collector Storage Solar Water Heaters (ICSSWHs) can support growing hot water demands of off-grid populations and reduce harm to human health and the environment. Despite their simple design and fewer associated components, stored thermal energy dissipates easily in foul weather. While thermal diodes are beneficial heat retention enhancement features in ICSSWHs, other simple additional strategies can enhance heat retention without significantly complicating the fabrication process. This article examines techniques of differing levels of complexity for the improvement of heat retention of a basic thermal diode ICSSWH. A basic thermal diode ICSSWH is adapted into a scalable Asymmetric Formed Reflector with Integrated Collector and Storage (AFRICaS) system and tested for heat retention performance along with other thermal insulation measures. The AFRICaS system improves heat retention efficiency and reduces heat loss coefficient to at least 35% and 1.46 W/K respectively. These results contrast with a heat retention efficiency and heat loss coefficient of 20% and 2.25 W/K respectively for a basic thermal diode ICSSWH. The AFRICaS prototype is potential launchpad for sustainable solar energy cogeneration.
KW - Integrated Collector SIntegrated Collector Storage Solar Water Heaters (ICSSWH)
KW - Thermal diode
KW - Non-imaging reflector
KW - Thermal retention
KW - Integrated Collector Storage Solar Water Heaters (ICSSWH)
UR - http://www.scopus.com/inward/record.url?scp=85066507035&partnerID=8YFLogxK
U2 - 10.1016/j.seta.2019.05.010
DO - 10.1016/j.seta.2019.05.010
M3 - Article
VL - 34
SP - 214
EP - 219
JO - Sustainable Energy Technologies and Assessments
JF - Sustainable Energy Technologies and Assessments
SN - 2213-1388
ER -