کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4992751 | 1457394 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparison of temperature difference measurement technologies used in vehicular heat exchangers
ترجمه فارسی عنوان
مقایسه تکنیک های اندازه گیری تفاوت دما که در مبدل های حرارتی خودرو استفاده می شود
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کلمات کلیدی
اندازه گیری تفاوت دما تعادل حرارتی، ترموکوپل ترکیبی، کالیبراسیون،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In the vehicle industry, thermal balance experiments have been extensively conducted on engines to determine energy distribution from fuel to engine power. The temperature differences between the hot and cold sides of the vehicular heat exchanger are the key parameters used to calculate the heat quantity. However, in certain gas-liquid heat exchangers, the temperature difference of the liquid side is significantly smaller than that of the gas side. Measurement errors can be increased if an inappropriate measurement method is adopted. To minimize the measurement errors, a new temperature difference measurement method based on compound thermocouple (CTC) is introduced in this study. This method is calibrated using a thermostatic oil tank. An empirical formula is used to evaluate cases in which the basic temperature ranges from 20 °C to 120 °C, and a temperature difference of less than 20 °C is gained. The proposed method has been implemented in a practical thermal balance experiment using a vehicle radiator, and the results are compared with that of pairing calibrated resistance temperature detectors (RTDs). The results show that the CTC-based method can reduce the averaged thermal balance error in vehicular cooling systems to less than 4%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 82, April 2017, Pages 94-101
Journal: Experimental Thermal and Fluid Science - Volume 82, April 2017, Pages 94-101
نویسندگان
Jiahong Fu, Zhentao Liu, Song Han, Jisheng Zhao, Yuqi Huang,