TECHNO-ECONOMIC ANALYSIS OF AN ALTERNATIVE SOLAR CONCENTRATION SYSTEM FOR LOW-PRESSURE STEAM GENERATION IN SMALL-SCALE INDUSTRIAL APPLICATIONS

Alatrista-Corrales A.; García-Velásquez A.; Cari-Apaza J.; Flores-Larico P. · International Journal of Energy, Environment and Economics (2022)

Resumen

Industrial applications of solar heat not only represent a promising opportunity for commercial diffusion of solar energy but a sustainable way for promoting energy access and economic development in rural areas. With the purpose of addressing the need for efficient and cost-effective design alternatives, this paper presents a novel design for a solar concentration system consisting of an asymmetric parabolic trough concentrator and a fixed-point receiver designed for low concentration ratios. The system does not require an automatic sun tracking system and can be manufactured by hand. The system allows the generation of low-pressure saturated steam, which can be used in small-scale industrial and rural applications. The system was tested in a discontinuous process of ironing for textile garments made with alpaca fiber. The system’s thermal efficiency was calculated using computational fluid dynamics (CFD) models; Likewise, the Levelized cost of heat (LCOH) was evaluated as well as the return on investment considering the location of the city of Arequipa-Peru. The system achieved a thermal efficiency of 25%. The investment cost was US$210.00/m2, and the LCOH was US$0.052/kWh. The results show that this system can be cost-effective in non-continuous processes of small-scale industrial applications, specially those that are located in areas with limited or more expensive access to conventional fuels.

Instituciones: Universidad Nacional de San Agustín de Arequipa