NDLI: Cleanliness Maintenance for an Amonix Lens System

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Sahm, Aaron Gray, Allison Boehm, Robert Stone, Ken
Copyright Year	2005
Abstract	The Amonix system is a high concentration PV system that utilizes Fresnel lenses to focus the sun’s rays on PV cells. This paper deals with issues related to the cleanliness of the lenses, the impact on performance, and the methods that can be used to clean the lenses. Issues addressed in the paper include the estimation of air-borne dirt accumulation with time. Data found in the course of our study were compared to data given in the literature about loss of transmissivity with acrylic soiling. These data were then modified to account for the two-axis tracking used for the Amonix unit, compared to the fixed orientation of the test. The effects of the loss of transmissivity were used to estimate decreases of the power produced. Costs of cleaning were compared to the lost revenue due to the decrease in sunlight reaching the cell. It is shown that rain is a good cleaning agent for the lenses. Barring precipitation, though, cleaning once a month is recommended.
Sponsorship	Solar Energy Division
Starting Page	817
Ending Page	822
Page Count	6
File Format	PDF
ISBN	0791847373
DOI	10.1115/ISEC2005-76036
e-ISBN	0791837653
Volume Number	Solar Energy
Conference Proceedings	ASME 2005 International Solar Energy Conference
Language	English
Publisher Date	2005-08-06
Publisher Place	Orlando, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Sunlight Photovoltaic power systems Precipitation Maintenance Lenses (optics)
Content Type	Text
Resource Type	Article

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