Browse by Subject "stationary air conditioning system analysis"

  • Meyer, J.J.; Dunn, W.E. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1996-12)
    This study examines the mass flow rate of refrigerants in adiabatic capillary tubes, with an emphasis on the nature of the metastable region for both single component refrigerants and mixtures. The metastable region of ...

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  • Andrade, M.A.; Bullard, C.W. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1999-07)
    Residential-scale ale systems control indoor temperature but not humidity. The advent of variable-speed compressors and blowers make such control possible. This paper uses a detailed simulation model to explore the ...

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  • Mullen, C.E.; Bridges, B.D.; Porter, K.J.; Hahn, G.W.; Bullard, C.W. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1997-04)
    Component submodels for a room air conditioner computer simulation were developed and validated using data from a 1.5-ton room air conditioner. The room air conditioner was tested over an extremely wide range: both indoor ...

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  • Kirby, E.S.; Bullard, C.W.; Dunn, W.E. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1997-07)
    A 1.5 ton window air conditioner was extensively instrumented and tested over a wide range of wet- and dry-coil operating conditions. The results were used to improve a steady-state simulation model. Published air- and ...

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  • Harshbarger, D.S. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-08)
    This report describes a method that allows finite element solutions to be simply implemented within a Newton-Raphson (NR) solution. The ACRC air conditioner system simulation model has been modified to accurately simulate ...

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  • Barnes, P.R.; Bullard, C.W. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-08)
    A simulation model was developed to investigate strategies for reducing total equivalent warming impact (TEWI) in compact water chillers. The focus was on minimizing R-410A refrigerant charge while increasing efficiency. ...

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  • Kirkwood, A.C. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1999-03)
    A steady-state microchannel split-system simulation model has been developed based on previous research at the ACRC. This model was utilized as a design tool to optimize a microchannel split system with the goal of ...

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  • Barnes, P.R.; Bullard, C.W. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-06)

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  • Jensen, A.C. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1996-07)
    A refrigerant-side instrumentation system has been developed, installed, and utilized to obtain steady-state data from a 1.5-ton capacity room air conditioner for the continued validation of a simulation model. This ...

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  • Jain, G.; Bullard, C.W. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2004-10)
    Issues involved in the solution of thermal system problems within a Newton-Raphson framework have been addressed. The physical limitations of Newton-Raphson variables and limited range of thermodynamic property calculation ...

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  • Yin, J.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1998-07)
    A mathematical model of adiabatic refrigerant flow through capillary tubes is presented. When using this model for R22, Chen et al.' s metastable model was improved by a correction factor related to Reynolds number. The ...

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  • Yin, J.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1998-02)
    A new theoretical model for predicting short tube orifice performance is presented. The new model can be used over wide parameter ranges, with subcooling from O°C to 50°C, inlet pressures as high as 35bar, and inlet ...

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