ZHANGJun,LIMeng-kai,FUZhi-min,et al.Water Temperature Characteristic of Low?pressure Mercury Lamp Electro-optical Conversion Efficiency[J].China Water & Wastewater,2023,39(15):89-93.
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Water Temperature Characteristic of Low?pressure Mercury Lamp Electro-optical Conversion Efficiency

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第15期 Page: 89-93 Column: Date of publication: 2023-08-01
Author(s):
ZHANG　Jun1; 2;  LI　Meng-kai1;  FU　Zhi-min3;  ZHANG　Fan4;  LI　Wen-tao1;  HE　Zhi-ming3;  QIANG　Zhi-min1; 2
（1. Key Laboratory of Drinking Water Science and Technology， Research Center for Eco? Environmental Sciences， Chinese Academy of Sciences， Beijing 100085， China； 2. School of Civil and Surveying & Mapping Engineering， Jiangxi University of Science and Technology， Ganzhou 341000， China； 3. Foshan Comwin Light & Electricity Co. Ltd.， Foshan 528500， China； 4. Zhengzhou Litong Water Co. Ltd.， Zhengzhou 450007， China）
Keywords:
low-pressure mercury lamp;  electro-optical conversion efficiency;  water temperature characteristic;  UV reactor;  water treatment
Abstract:
The electro-optical conversion efficiency (ECE) of low-pressure mercury lamp is affected by water temperature. Therefore, the water temperature characteristic of the lamp is very important for the optimal design and operation maintenance of UV reactor for water treatment. Based on the self-developed micro fluorescent silica detector (MFSD) and the ECE test method in air proposed by International Ultraviolet Association, this paper proposed a test method for determining water temperature characteristics of low-pressure mercury lamp ECE, and built a device to test the water temperature characteristics of low-pressure mercury lamps produced by 4 manufacturers. The method accurately determined the relationship between ECE of low-pressure mercury lamp and water temperature. When the water temperature was increased from 5 ℃ to 35 ℃, the ECE of the tested lamp showed an overall increasing trend. The ECEs of lamp A and B measured in water were similar to those measured in air, the ECE of lamp C in water was higher than that at room temperature (35.5%), and the ECEs of lamp D in both water and air were the lowest. The application of the ECE measured in air to water treatment would introduce errors. Therefore, the appropriate low-pressure mercury lamp should be selected based on the water temperature characteristics of low-pressure mercury lamp accurately measured in actual application scenarios, so as to improve the efficiency and ensure the reliability.
Last Update: 2023-08-01