ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Journal of Enhanced Heat Transfer
インパクトファクター: 0.562 5年インパクトファクター: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN 印刷: 1065-5131
ISSN オンライン: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v24.i1-6.330
pages 459-472

A REVIEW ON HEAT TRANSFER AND PRESSURE DROP DURING EVAPORATION AND CONDENSATION OF R22 INSIDE 9.52-MM O.D. MICROFIN TUBES OF DIFFERENT GEOMETRIES

Adriano Muzzio
Dipartimento di Energetica - Politecnico di Milano, Milan, Italy
Alfonso Niro
Department of Energy, Politecnico di Milano, Via Lambruschini 4, Milano IT−20156, Italy
S. Arosio
Dipartimento di Ingegneria Energetica, Universita di Genova, Politecnico di Milano piazza Leonardo da Vinci 32, 20133 Milano, Italy

要約

Saturated flow boiling and convective condensation experiments for oil-free Refriger-ant-22 have been carried out with a microfin tube with a new cross-section profile, as well as with two traditional microfin tubes and with a smooth one. All tubes have the same outer diameter. Data are for mass fluxes ranging from about 90 to 400 kg/m2·s. In boiling tests, the nominal saturation temperature is 5°C, with inlet quality varying from 0.2 to 0.6 and the quality variation along the test section ranging from 0.1 to 0.5. In condensation, results are for saturation temperature equal to 35°C, with inlet and outlet qualities of 0.8 and 0.2, respectively. The new microfin tube shows the best thermal performances among the microfin tubes tested, especially in evaporation. For this case, the enhancement factor comes up to 4. Experimental results for microfin tubes are compared with predictions of a correlation scheme recently proposed; these predictions correlate well only with data for the microfin tube with a geometry much similar to one accounted by the scheme.


Articles with similar content:

Heat Transfer and Pressure Drop During Evaporation and Condensation of R22 inside 9.52-mm O.D. Microfin Tubes of Different Geometries
Journal of Enhanced Heat Transfer, Vol.5, 1998, issue 1
Alfonso Niro, S. Arosio, Adriano Muzzio
Experimental heat transfer coefficient and pressure drop during condensation of R22 and R407C inside a horizontal microfin tube
International Heat Transfer Conference 12, Vol.48, 2002, issue
Luca Doretti, Luisa Rossetto, Claudio Zilio, Giuseppe Censi, Giovanni Antonio Longo, Alberto Cavallini, Davide Del Col
HEAT TRANSFER AND PRESSURE DROP DURING EVAPORATION AND CONDENSATION OF R134a INSIDE TWO MICROFIN TUBES OF NEW DESIGN
International Heat Transfer Conference 13, Vol.0, 2006, issue
Alfonso Niro, Andrea Lucchini, Luigi Pietro Maria Colombo, Adriano Muzzio
CONDENSATION HEAT TRANSFER IN SMALL DIAMETER TUBES
International Heat Transfer Conference 11, Vol.17, 1998, issue
Ming Zhang , Ram Narayanamurthy, Ralph L. Webb
Convective Vaporization of Pure Refrigerants in Enhanced and Integral-Fin Tube Banks
Journal of Enhanced Heat Transfer, Vol.1, 1994, issue 4
Neelkanth S. Gupte, Ralph L. Webb