UV-C LED Devices and Systems: Current and Future State

Transcription

1 UV-C LED Devices and Systems: Current and Future State IUVA Americas Conference February 2018 Authors: Molly McKain Dr. Jennifer Pagan, Oliver Lawal, Jim Cosman

2 What are Light Emitting Diodes (LEDs)? Lens Submount LED Chip Outer Package Wafer with over 20,000 LEDs Detailed view of an LED Individually packaged 2

3 LEDs are High Power Density Light Sources More photons per surface area Smaller lamp footprint Smaller UV system 3

4 Small is Problematic for Hg Smallest Hg lamp is double the size of LED lamp LED lamp includes drive and monitoring circuitry Parameter Brand Ushio Philips Philips2 Ushio3 AquiSense MPN (Part No.) PL-S5W/TUV PAQC-1 Lamp Architecture T7 Twin-Tube Twin-Tube Twin-Tube PCB Base Type E17 G23 G23 G23 PCB Life Hours (Hours) 3,000 8,000 8,000 8,000 10,000 Wattage (Watts) 3 Watt 5.5 Watt 9 Watt 9 Watt 8 Watt Voltage Current (Amps) UV-C Output (Watts) Wavelength nm nm nm nm nm Length (mm) X 30 Diameter (Inches) 20 25, (height) WPE 5% 20% 26% 27% 2% 4

5 Lamp Output [%] Lamp Output [%] Lamp Output [%] Potential (Application Specific) Additive Benefits Lamp Warm-Up Time Lamp Heat and Light Direction Fouling Potential 20 UV-LED Gas Discharge Time [sec] Lamp Output vs. Water Temperature Lamp Aging with High On-Off Cycling (over 10/day) UV-LED Gas Discharge 20 UV-LED Gas Discharge Water Temperature [ C] Time [hrs] 5

6 Historical UV-C LED Device Efficiency 6 Best-in-Class Single Devices Source: Dept of Energy & Internal AquiSense Measurement Data Source: Internal AquiSense Measurement Data Current Best-In-Class Device Wall Plug Efficiency 4% UV Intensity Output 70mW Lifetime L70 10,000 hours

7 Why System Design Matters The design of the system is just as important as the LEDs within it. Mercury lamps are 15-35% efficient so they can be pared with a moderately efficient reactor. UV LEDs are less than 5% efficient so they must be paired with a highly efficient reactor. 7

8 Example Applications Under Development Transportation RV & Boating Automotive Aviation (fuel systems & DW) Space (Habitats & Exploration) Health Care HAI Control Dialysis Dental Life Sciences Bio-pharma UPW Commercial Food & Beverage Service Water Dispensers & Fountains Residential POE White Goods Faucets Defense/Emergency Response Personal Hydration Remote Treatment 8

9 Current Commercial Systems Commercially available UV-C LED systems are more common in sub 20lpm range Targeting small footprint, intermittent flow applications (not ideal for mercury gas discharge) Price point remains challenging Not competing with large scale Hg systems 9

10 Case Study: Commercial Steam Oven Problem: Pathogens in low temperature steam ovens Goals: Disinfect inlet water Key Design Parameters: 4-log target pathogen reduction Intermittent flow (6 sec On, 30 Sec off) Small envelope Warm environment Solution: PearlAqua Micro Met all design parameters Completed product robustness testing Volume Production Start Date Q

11 Haitz s Law So Far, So Good For every decade of development LED Optical Power increases 20x and cost/lumen falls by 10x Implication for 2026 is 1.4 Watt per LED at 0.1 $/mw 11

12 Reported Performance Records (Research) Benchmark: Typical Medium Pressure, Hg lamp Research grade UVC LEDs are already more efficient than some UV lamps will debut products in excess of 100mW per single chip

13 Implications for Future Commercialization LED Devices Increase Efficiency LED Devices Lower Cost Refined System Engineering Larger Systems 4% best-in-class commercial 20% lab devices If LEDs become ultra-low cost, then efficiency has a lower factor Novel LED reactors have shown higher efficiencies than conventional lamp reactors LEDs have specific characteristics that can lower Operating Cost

14 Municipal Water Treatment Piloting Started in 2017 Expect the first municipal system installations in 2019 Source: Typhon Treatment Source: MetaWater 10

15 Surface & Air Applications Distributed, batch applications progress to centralized continuous applications 15 Source: SealShield

16 Space Habitats & Exploration ISS currently has 88% water recycling efficiency Over 92% required for long term exploration and closed habitat UV-C LED systems playing key role in process solution UV-C LED technology will help us get to, and live on Mars Strong correlation to terrestrial treatment solutions 16

17 Summary LEDs offer some application specific advantages Evaluation on-going in large range of applications High volume commercial applications exist If Haitz s Law continues, larger systems will follow 17 Molly McKain - Applications Engineer AquiSense Technologies molly.mckain@aquisense.com