Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
Flow Boiling Pressure Drop of R134a in Microdiameter Tubes: Experimental Results and Assessment of Correlations
Faculty
Science
Year:
2014
Type of Publication:
Article
Pages:
178-192
Authors:
Mahmoud, Mohamed M, Karayiannis, Tassos G, Kenning, David B. R
DOI:
10.1080/01457632.2013.812491
Journal:
HEAT TRANSFER ENGINEERING TAYLOR \& FRANCIS INC
Volume:
35
Research Area:
Thermodynamics; Engineering; Mechanics
ISSN
ISI:000323999100007
Keywords :
Flow Boiling Pressure Drop , R134a , Microdiameter
Abstract:
The experimental results of two-phase flow boiling pressure drop of R134a in vertical microdiameter stainless steel tubes are presented in this paper. The tests were conducted using four tubes: one tube with an inner diameter of 0.52mm and 100mm heated length and three tubes with an inner diameter of 1.1mm and different heated lengths (150, 300, and 450mm). Other experimental conditions include mass flux range of 200-500kg/m(2)-s, system pressure range of 6-10 bar, inlet subcooling value of about 5K, and heat flux range of 1-140 kW/m(2). The results indicated that the total measured two-phase pressure drop increases with increasing mass flux, heat flux (exit quality) and decreasing system pressure and tube inner diameter. The test section heated length was found to have a significant effect on the measured pressure drop per metre length. The total measured two-phase pressure drop results were also compared with eighteen macro- and microscale models and correlations.
Online
PDF
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف