Optimization of the Friction Factor and Frictional Pressure Drop of R22 and R290

International Journal of Technology

卷:7

SentotNovianto¹  Agus S.Pamitran¹  NormahGhazali²  Qais AbidYousif²  RobiahAhmad³ 

[1] Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, KampusUI Depok, Depok 16424, Indonesia;

[2] Faculty of Mechanical Engineering, Universiti Teknologi Malaysia 81310 Skudai, Johor, Malaysia;

[3] UTM Razak School of Engineering and Advanced Technology, Universiti Teknologi Malaysia54100 JalanSemarak, Kuala Lumpur, Malaysia;

关键词: Darcy friction factor, Genetic algorithm, Optimization, Pressure drop;   

DOI  :  10.14716/ijtech.v7i2.1609

来源: DOAJ

【 摘 要 】

Today, the air-conditioning andrefrigeration industry is still searching for environmentally friendlyrefrigerants that could replace hazardous, ozone-depleting coolants –refrigerants that behave similarly, if not better, than the present ones. Thepresent study examines optimization of the frictional pressure drop of R22 andR290 using genetic algorithm. Outcomes are compared against the measuredpressure drop obtained from a horizontal 7.6 mm channel with a length of 1.07meters. Three equations have been used for calculating the Darcy frictionfactor and two-phase flow pressure drop for both laminar and turbulent flowregimes in smooth and rough tubes. The effects of the different correlationsfor the friction factor and pressure drop utilized are demonstrated. Theresults illustrate that the differences between values of the Darcy frictionfactor are very small for the two refrigerants examined, with the frictionalpressure of R-290 higher than R-22. Use of a smaller channel induced a muchhigher frictional pressure drop, as well.

【 授权许可】

Unknown