کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5017012 | 1466383 | 2017 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Diagrams of entropy for ammonia-water mixtures: Applications to absorption refrigeration systems
ترجمه فارسی عنوان
نمودارهای آنتروپی برای مخلوط آمونیاک و آب: برنامه های کاربردی برای سیستم های تبرید جذب
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
The objective of this work is to calculate the entropy of ammonia-water mixture as a function of temperature, pressure, concentration, and other thermodynamic properties associated to absorption process, to support energy and exergy analysis of absorption refrigeration systems. This calculation is possible because a novel mathematical modelling was developed for this attempt. This determination will allow simulation and optimisation of absorption refrigeration systems, giving major importance in determining the values of thermodynamic properties of ammonia-water mixtures, such as enthalpy and entropy. A mathematical modelling for thermodynamics properties calculation at liquid and vapour phases of ammonia-water system is developed. The studies were based on the enthalpy vs. concentration diagram obtaining the enthalpy in the liquid phase corresponding at a temperature range from 80 °C to â40 °C. The mixtures enthalpy values were calculated for ammonia (h1c) and water (h2c) by using a non-linear regression program. The evaluation of thermodynamic properties in this work was discretised by formulating appropriate equations for each type of substance. However, thermodynamic properties of mixtures can be determined based on data from simple substances and mixing laws, or from an equation of state that considers the mixture concentration. The consistency of experimental data indicates the most suitable method to be used in entropy calculation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 82, October 2017, Pages 335-347
Journal: International Journal of Refrigeration - Volume 82, October 2017, Pages 335-347
نویسندگان
Diovana Aparecida dos Santos Napoleao, Jose Luz Silveira, Giorgio Eugenio Oscare Giacaglia, Wendell de Queiroz Lamas, Fernando Henrique Mayworm Araujo,