Title of article :
FLOW BOILING HEAT TRANSFER CHARACTERISTICS OF R600A AND R290 IN VERTICAL MINI-CHANNELS
Author/Authors :
Anwar, Z. University of Engineering and Technology - Mechanical Engineering Department, Pakistan , Ahmed, I. University of Engineering and Technology - Mechanical Engineering Department, Pakistan , Noor, F. University of Engineering and Technology - Mechanical Engineering Department, Pakistan , Ali, Z. University of Engineering and Technology - Mining Engineering Department, Pakistan , Imran, S. University of Engineering and Technology - Mechanical Engineering Department, Pakistan , Siyal, S. H. Quaid e Awam University of Engineering Sciences and Technology - Energy and Environment Department, Pakistan , Sultan, T. COMSATS Institute of Engineering and Technology - Chemical Engineering Department, Pakistan
Abstract :
High heat dissipation from compact modern electronic devices demands smart cooling solutions to ensure proper functionality. Two phase heat transfer has the capability to cope with high heating/cooling demands with better temperature uniformity along the chip. Refrigerant related environmental concerns (ozone depletion, global warming etc.) instigated recent surge for new alternatives. Natural refrigerants are regaining their fame, however reliable experimental studies under wide operating conditions are required for designing novel practical devices. Keeping in view the current demands, this study is focused on the thermal performance of two natural hydrocarbon refrigerants (Isobutane R600a, and Propane R290) in uniformly heated small vertical stainless steel tubes. The heat transfer performance of natural refrigerants is also compared with R134a under similar experimental conditions. The experiments werecarried out under wide operating conditions and continued till completion of dryout. The effects of operating parameters (heat flux, mass flux, vapor quality, saturation temperature etc.) along with assessment of macro and micro-scale correlations are the very subjects of this study
Keywords :
Mini , channel , Heat Flux , Isobutane , Propane , Correlation
Journal title :
Journal of Faculty of Engineering and technology (JFET)
Journal title :
Journal of Faculty of Engineering and technology (JFET)
