Performance Evaluation of Small Scale Air-Conditioning System Using R22 and Alternative Refrigerants

A mathematical model has been formulated to predict the influence of high outdoor air temperature on the performance of small scale air - conditioning system using R22 and alternative refrigerants R290, R407C, R410A. All refrigerants were investigated in the cooling mode operation. The mathematical model results have been validated with experimental data extracted from split type air conditioner of 2 TR capacity. This entailed the construction of an experimental test rig which consists of four main parts. They are, the refrigeration system, psychrometric test facility, measuring instrumentation, and auxiliary systems. The conditioned air was maintained at 25 0 C dry bulb and 19 0 C wet bulb for all tests. The outdoor ambient air temperature was varied from 35 0 C to 55 0 C in 5 0 C increments. The study showed that R290 is the better replacement for R22 when the air conditioning system works under high ambient temperature. It has better performance as a drop in refrigerant. R407C has the closest performance to R22, followed by R410A.

[1]  Yuang-Cherng Chiou,et al.  Experimental study on temperature distributions within the workpiece during friction stir welding of aluminum alloys , 2008 .

[2]  James E. Kelley,et al.  Critical-Path Planning and Scheduling: Mathematical Basis , 1961 .

[3]  Katsunori Nagano,et al.  Steady state vapor compression refrigeration cycle simulation for a monovalent inverter-driven water-to-water heat pump with a desuperheater for low energy houses , 2012 .

[4]  James E. Braun,et al.  The Impact of Modeling Complexity and Two-Phase Flow Parameters on the Accuracy of System Modeling for Unitary Air Conditioners , 2004 .

[5]  K. Sakaino,et al.  Some Approaches Towards a High Efficient Rotary Compressor , 1984 .

[6]  Jeffrey D. Spitler,et al.  A Parameter Estimation Based Model of Water-to-Water Heat Pumps for Use in Energy Calculation Programs , 2002 .

[7]  Chung-Wei Feng,et al.  Construction Time-Cost Trade-Off Analysis Using LP/IP Hybrid Method , 1995 .

[8]  Thomas Stützle,et al.  Ant Colony Optimization , 2009, EMO.

[9]  R. H. Kropschot,et al.  Perlite for Cryogenic Insulation , 1963 .

[10]  Bing Xu.  A numerical investigation of refrigerant flow through non-adiabatic capillary tubes , 2001 .

[11]  D. R. Robinson.  A Dynamic Programming Solution to Cost-Time Tradeoff for CPM , 1975 .

[12]  Abbas Afshar,et al.  Nondominated archiving genetic algorithm for multi-objective optimization of time-cost trade-off , 2007 .

[13]  Ramón Cabello,et al.  Simplified steady-state modelling of a single stage vapour compression plant. Model development and validation , 2005 .

[14]  Chi-Chuan Wang,et al.  A generalized heat transfer correlation for Iouver fin geometry , 1997 .

[15]  Jean Lebrun,et al.  Simplified modelling of an open-type reciprocating compressor , 2002 .

[16]  William Prager.  A Structural Method of Computing Project Cost Polygons , 1963 .

[17]  S. Wongwises,et al.  Numerical investigation of refrigerant flow through non-adiabatic capillary tubes , 2002 .

[18]  J D Verschoor,et al.  HEAT TRANSFER BY GAS CONDUCTION AND RADIATION IN FIBROUS INSULATION , 1952 .

[19]  S. Wongwises,et al.  A comparison of flow characteristics of refrigerants flowing through adiabatic straight and helical capillary tubes , 2011 .

[20]  Clark W. Bullard,et al.  A Simple Approach to Performance Analysis of Alternative Refrigerant Rolling-Piston-Type Rotary Compressors , 2001 .

[21]  A. Hofmann.  The thermal conductivity of cryogenic insulation materials and its temperature dependence , 2006 .

[22]  S. K. Goyal.  Note---A Note on “A Simple CPM Time-Cost Tradeoff Algorithm” , 1975 .

[23]  H. Assadi,et al.  Effect of friction stir welding speed on the microstructure and mechanical properties of a duplex stainless steel , 2008 .

[24]  Ihn-Sung Cho,et al.  Lubrication characteristics of a rotary compressor used for refrigeration and air-conditioning systems (the influence of alternative refrigerants) , 2010 .

[25]  이정호,et al.  Fundamentals of Fluid Mechanics, 6th Edition , 2009 .

[26]  M. Shah.  A general correlation for heat transfer during film condensation inside pipes , 1979 .

[27]  W. Chen,et al.  A comparative study on the performance and environmental characteristics of R410A and R22 residential air conditioners , 2008 .

[28]  Frank P. Incropera,et al.  Fundamentals of Heat and Mass Transfer , 1981 .

[29]  H. Wakabayashi,et al.  Analysis of Performance in a Rotary Compressor , 1982 .

[30]  Donald E. Grierson,et al.  Comparison among five evolutionary-based optimization algorithms , 2005, Adv. Eng. Informatics.

[31]  M. Spatz.  Replacements for HCFC-22 in Air Conditioning and Heat Pump Systems , 2000 .

[32]  P. Techarungpaisan,et al.  Modeling of a split type air conditioner with integrated water heater , 2007 .

[33]  P. Domanski,et al.  Performance of a finned-tube evaporator optimized for different refrigerants and its effect on system efficiency * , 2005 .

[34]  Shan K. Wang,et al.  Handbook of Air Conditioning and Refrigeration , 1993 .

[35]  A. Abdel-azim.  Fundamentals of Heat and Mass Transfer , 2011 .

[36]  M. Hollingsworth,et al.  The Performance of Glass Fiber Insulation under High Vacuum , 1960 .

[37]  James H. Patterson,et al.  A Horizon-Varying, Zero-One Approach to Project Scheduling , 1974 .

[38]  Jonathan M. Winkler,et al.  Development of a Component Based Simulation Tool for the Steady State and Transient Analysis of Vapor Compression Systems , 2009 .

[39]  Chris Hendrickson,et al.  Project Management for Construction: Fundamental Concepts for Owners, Engineers, Architects, and Builders , 1989 .

[40]  Haitao Hu,et al.  Experimental investigation and correlation of two-phase frictional pressure drop of R410A-oil mixture flow boiling in a 5 mm microfin tube , 2009 .

[41]  Eric Dumont,et al.  Modelling of reciprocating and scroll compressors , 2007 .

[42]  Abbas Afshar,et al.  Stochastic time–cost optimization using non-dominated archiving ant colony approach , 2011 .

[43]  F. C. McQuiston.  Finned tube heat exchangers: State of the art for the air side , 1980 .

[44]  Peter E.D. Love,et al.  Using improved genetic algorithms to facilitate time-cost optimization , 1997 .