Enhancing Thermal Efficiency in Solar Water Heaters Using Reflective Mirrors
الباحث الأول:
Qusay J. Abdul-Ghafoor
الباحثين الآخرين:
Faez Abid Muslim Abd Ali
Wajeeh K. Hasan
Karrar A. Hammoodi
المجلة:
International Journal of Design & Nature and Ecodynamics
تاريخ النشر:
29 فبراير، 2024
مختصر البحث:
With the development of solar energy collection technologies and the mechanism of
exploiting solar energy as renewable energy, it was necessary to develop a solar vacuum
tube system, which is considered one of the old systems with little efficienc…
With the development of solar energy collection technologies and the mechanism of
exploiting solar energy as renewable energy, it was necessary to develop a solar vacuum
tube system, which is considered one of the old systems with little efficiency. In order
for the development process to be completed, it was necessary to place side reflectors
that border the pipes from all sides to better reflect solar radiation and raise the
temperature of the pipes to the required level. The optimal angle for increasing
temperature was determined by adjusting the sidewalls of mirrors, adjusting the wall
width, and comparing angles at various angles (30, 40, 50, 60, 70, 80, 90) degrees, to
achieve the best results. The angle of the mirrors on the pipes is adjusted from 30 to 90
degrees, as well as their width from 250 mm to 500 mm, and from 5 a.m. to 5 p.m., with
a difference of one hour each reading. The temperature gradient on solar collector tubes
increases with time and mirror angle, reaching maximum at noon and 30 degrees.
Infrastructural radiation increases significantly at 30 degrees, reaching 700 W/m2. The
width of the mirror wall affects radiation reflection and distribution, with a 500 mm width
being more effective. The 30-degree angle had the highest thermal efficiency at 84%,
while a 500 mm width difference achieved 86%. The novelty of the work varies in terms
of developing the thermal efficiency of the solar collector by adding these influential
factors to it.
