four kinds of refrigerant mixtures R22/Rl34a, R22/Rl52a, R22/Rl42b and R22/Rl23, which contain some new halocarbons which are considered to be the alternatives for CFCs, were evaluated in order to realize higher condensing temperature than that using R22 at high temperature operation, and larger heating capacity than that using R22/Rll4 at normal temperature operation. These mixtures were appli...

Music is often discussed to be emotional because it reflects expressive movements in audible form. Thus, a valid approach to measure musical emotion could be to assess movement stimulated by music. In two experiments we evaluated the discriminative power of mobile-device generated acceleration data produced by free movement during music listening for the prediction of ratings on the Geneva Emot...

This paper investigates the effects of nonazeotropic refrigerant mixtures (NARMs) as replacement of CFCs. The thermodynamic propert1es of NARM R22/R142b which is harmless to ozone layer are analyzed. The tests about water-to-water heat pump and dual-evaporator refrigerator-freezer using R22/R142b as alternative to R12 are introduced. The test results show R22/Rl42b is of energy conserving effec...

CFCs have been phased out, except for essential users, and HCFCs are to be eliminated by 2020, because of their ozone depletion potential. This generates a need for the investigation of zero ozone depletion potential (ODP) refrigerants or refrigerant blends. R410A is among newer brand of refrigerant blends, with zero ODP. The biggest difference to R22 is the pressure levels generated which are ...

AN EVALUATION OF TWO REFRIGERANT MIXTURES IN A BREADBOARD AIR CONDITIONER William Mulroy Michael Kauffeld Mark McLinden David Didion National Bureau of Standards Gaithersburg, Maryland 20899 An experimental, water-to-water, breadboard heat pump, tha t is one which could easily be reconfigured, was constructed fo r comparison of pure R22 to the refrigerant mixtures R22/R11 4 ahd R13/Rl2. Three e...

The calculation of two-phase flow boiling heat transfer of R22 in channels is required in a variety of applications, such as chemical process cooling systems, refrigeration, and air conditioning. A number of correlations for flow boiling heat transfer in channels have been proposed. This work evaluates the existing correlations for flow boiling heat transfer coefficient with 1669 experimental d...

In this paper, an experimental study of R1234yf replacing R22 in window air conditioning was carried out. The optimum types capillary tubes and the charge amount were obtained, system performance charged with tested conditioner teat facility under nominal high-temperature conditions. results revealed that cooling capacity coefficient (COP) 28.5% 11.1%, respectively, conditions, which lower than...

This paper presents the experimental performance analysis of a window air conditioner using two refrigerants R22 and R410A.The effect of the different parameters of performance analysis (refrigeration capacity, COP, compressor power ,pressure ratio ) were investigated for various evaporating temperature and ambient temperature. .The result shows that refrigerant R22 is better than R410A in case...

A. 1 ohansson and P. Lundqvist Dept. of Energy Technology Div. of Applied Thennodynamics and Refrigeration The Royal Institute of Technology, KTH Stockholm, Sweden Test results from field retrofit situations, where R22 has been changed to Isceon 59 1 and R407C in two identical chillers, shows that both substitutes require more subcooling than R22 to give the system a satisfying performance. It ...