Abstract
Common ultraviolet (UV) photodiodes or detectors for measuring the intensity of UV-light-emitting diodes (LEDs) in UV disinfection systems are costly. This study explores the potential of using low-cost UV-LEDs as photometers for monitoring UV intensity in water systems. Reverse LEDs (rLEDs) generate a small current proportional to the incident light intensity on the p-n junction when operated in unbiased mode. rLEDs with different wavelengths and power levels were examined to find the optimal rLED for monitoring the intensity of a 275 nm LED strip, achieving less than 1% deviation from a calibrated spectroradiometer. The influence of temperature was also examined on rLED measurements and found non-negligible. This work demonstrates the feasibility of using rLEDs as intensity monitoring sensors for UV-C LED sources, offering a low-cost and reliable alternative for UV intensity monitoring in UV-LED water disinfection systems.
| Original language | English |
|---|---|
| Pages (from-to) | 2407-2415 |
| Number of pages | 9 |
| Journal | Energy Advances |
| Volume | 3 |
| Issue number | 9 |
| DOIs | |
| State | Published - 19 Aug 2024 |
All Science Journal Classification (ASJC) codes
- Energy (miscellaneous)
- Energy Engineering and Power Technology
- Fuel Technology
- Renewable Energy, Sustainability and the Environment
