International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Parametric Optimization of Solar Parabolic Collectors Using AHPTOPSIS J Ravi Kumar1, K Dharma reddy2, P Venkataramaiah3
1PG
Scholar, Dept. of Mechanical Engineering, Sri Venkateswara University, Tirupati, A.P., India. Professor, Dept. of Mechanical Engineering, Sri Venkateswara University, Tirupati, A.P., India. 3Professor, Dept. of Mechanical Engineering, Sri Venkateswara University, Tirupati, A.P., India.
2Assistant
---------------------------------------------------------------------***--------------------------------------------------------------------1.1 Introduction of Solar Thermal systems Abstract - In the present work the behavior of linear solar parabolic Collector is studied. An experimental design is prepared based on the considered parabolic collector parameters such as Temperature, Discharge and Period of Sun Incidence (POI). The copper alloy c101 tube and aluminum alloy 1199 are used in experimental setup as absorbers. Copper alloy c101 tube has composition of Copper(99.998%), Antimony (0.1ppm), Arsenic(0.1ppm), Bisumasu (0.1ppm), Cadmium (<0.1ppm), Iron (1ppm), Lead (1ppm), Manganese (<=0.1ppm), Nickel (0.5ppm) and Aluminium alloy1199 has aluminium (99.98%), copper (0.006%), gallium (0.005%), iron (0.005%), titanium(0.002%), magnesium (0.006%) and the reflective surfaces are considered at two levels, one is Glass mirror and other is polished aluminum. Present work is focused on improvement of temperature of working fluid (water) and discharge of fluid, which influenced by parameters such as absorber tube materials, reflective sheet materials, time duration. The experiments are conducted according to the Taguchi design on the solar parabolic collector. This data is analyzed using AHP-TOPSIS and optimal parameter combination has been identified.
Concentrating solar technologies, such as the parabolic dish, compound parabolic collector and parabolic trough can operate at high temperatures and are used to supply industrial process heat, off-grid electricity and bulk electrical power. In a parabolic trough solar collector, or PTSC, the reflective profile focuses sunlight on a linear heat collecting element (HCE) through which a heat transfer fluid is pumped. The fluid captures solar energy in the form of heat that can then be used in a variety of applications.
1.2 Experimental Setup (a) The experimental setup consists of the following components: 1)Parabolic Shaped Structure, 2) Supporting legs, 3) Reflective Surfaces, 4) Heat collecting element(Absorber), 5) Auto Tracking System, 6) Piping system and Storage tank. The whole experimental setup is placed on the top of the buildings. All the components are assembled to form the entire setup. The entire set is placed in the N_S direction to face the axis of the parabolic trough towards east. (b) Plan of investigation: It is planned that the experiments are conducted according to the L 36 array with respect of factors and levels of problem. Table2.: Process parameters and their levels
Key Words: 1)Parabolic Shaped Structure, 2) Supporting legs, 3) Reflective Surfaces, 4) Heat collecting element(Absorber), 5) Auto Tracking System, 6) Piping system and Storage tank. 1. INTRODUCTION The powerful presence of the sun is hard to ignore in one’s everyday life: indeed, the majority of life on Earth could not exist without its vast output of radiant energy. At any given moment, the Earth’s upper atmosphere receives solar radiation amounting to 174 PW (Peta Watts) of power. As shown in Figure 1.2, about 55% of this reaches the Earth’s surface and is either absorbed or reflected by land and oceans. With such a vast amount of solar energy available, humanity could meet its demands by harnessing just a small fraction of this. Indeed, the total annual solar radiation falling on the Earth is more than 7500 times greater than the world’s total annual primary energy consumption (WEC 2007). Furthermore, unlike fossil fuels, solar energy will continue to be available for billions of years.
© 2017, IRJET
|
Impact Factor value: 5.181
|
S. No
Process Parameters
Level 1
Level 1
Level 1
1
Reflectivity
Polished Aluminum (AP)
Glass Mirror (GM)
-
2
Absorptivity
Copper Alloy C101 tube
Aluminum Alloy 1199 tube
-
3
Period of sun incidence (POI)
10.00AM12.00PM
12.00PM2.00PM
2.00PM4.00PM
ISO 9001:2008 Certified Journal
|
Page 270