Quick Answer
Research by the National Renewable Energy Laboratory (NREL) and the University of California, Los Angeles (UCLA) demonstrates the effectiveness of solar panel desiccants in reducing summer heat derating and improving solar panel efficiency.
Reducing Summer Heat Derating
Solar panel desiccants have been shown to mitigate the effects of high temperatures on solar panel efficiency. A study conducted by UCLA in 2018 found that using a desiccant to control temperature fluctuations resulted in a 2.5% increase in average solar panel efficiency over the course of a summer day. This is significant, as high temperatures can cause solar panels to lose up to 25% of their efficiency.
Design and Implementation Considerations
When designing a solar panel desiccant system, it’s essential to consider factors such as panel temperature, humidity, and air flow. A common technique is to use a finned heat exchanger to increase the surface area for heat transfer. For example, a study by NREL in 2015 found that using a finned heat exchanger in a solar panel desiccant system increased cooling capacity by 30%. Additionally, the system should be designed to operate in a closed-loop mode to minimize energy losses.
Case Studies and Future Research Directions
One notable case study is the installation of a solar panel desiccant system at the University of Arizona’s College of Engineering. The system, which used a desiccant to control temperature fluctuations, resulted in a 4.5% increase in average solar panel efficiency over the course of a summer day. Future research directions may include the development of more efficient desiccant materials and the exploration of new cooling techniques, such as evaporative cooling.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.