Browse Technical Reports - Air Conditioning and Refrigeration Center by Issue Date

  • Laleman, M.R. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-05)
    This thesis examines the modes of energy loss incurred when the door of a refrigerator is opened. An analysis is done on the fresh food compartment of a 20 cu. ft. refrigerator unit, which is instrumented with aluminum ...

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  • Staley, D.M.; Bullard, C.W.; Crawford, R.R. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-06)
    This paper develops a steady-state system design model for a standard 18 ft3 refrigerator/freezer. Models for the compressor, condenser, evaporator, and suction line interchanger are considered. Experimental data for both ...

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  • Wang, S.P.; Chato, J.C. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-08)
    The fundamental physics and application of boiling and condensation of mixtures have attracted more and more attention. In this paper, the recent research in this field is reviewed. More than one hundred papers concerned with ...

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  • Meyer, J.J.; Jabardo, J.M.S. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-09)
    Liquid refrigerant/oil concentrations in a flowing system were monitored using speed of sound and temperature measurements. Data were taken for R12 with 3GS and 5GS oils and an R-134a/Ester mixture with concentrations ...

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  • Souza, A.L.; Chato, J.C.; Jabardo, J.M.S.; Wattelet, J.P.; Panek, J.S.; Christoffersen, B.R.; Rhines, N. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-10)
    A single tube evaporator test facility capable of measuring pressure drop and heat transfer coefficients inside horizontal tubes has been designed and developed at the Air Conditioning and Refrigeration Center at the ...

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  • Hinde, D.K. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-10)
    This study investigated local condensation heat transfer and pressure drop for pure R- 12, pure R-134a and R-134a/oil mixtures and examined the results based on two-phase flow patterns. Condensing conditions simulated ...

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  • Purvis, B.D. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-11)
    This report examines the phenomena of flashing fluid flow in small diameter tubes (on the order of 1 mm). Small diameter tubing is often used as the expansion device in refrigeration systems. Tubing used as a refrigeration ...

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  • Sheiretov, T.K.; Van Glabbeek, W.; Cusano, C. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-12)

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  • Barnhart, J.S. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-12)
    An experimental study of two-phase flow patterns and droplet entrainment in a horizontal-tube evaporator was conducted. The study is an element of the worldwide change from the current generation of refrigerants to ...

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  • Porter, K.J.; Bullard, C.W. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-12)

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  • Gonzalez G, J.M.; Jabardo, J.M.S.; Stoecker, W.F. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-12)
    This paper is a literature review and correlation of data on falling film and spray evaporators. This type of evaporator offers the potential advantages of improved heat-transfer coefficients and a reduction in charge ...

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  • Marin, O. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1992-12)

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  • Smith, M.K.; Wattelet, J.P.; Newell, T.A. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1993-01)
    An average R12 refrigerant correlation has been developed for the mass flux range of 25-100 kg/m2-s and the heat flux range of 2-10 kW/m2. Refrigerant mixtures of 80% R22/lO% R141b and 65% R22/35% R123 have also been ...

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  • Orth, L.A.; Zeitlow, D.C.; Pederson, C.O. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1993-04)
    Currently, the refrigerant inventory for vapor compression systems is determined using a costly trial and error procedure. An accurate computer model of the refrigerant in a system would reduce the time and expense ...

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  • Wattelet, J.P.; Chato, J.C.; Souza, A.L.; Christoffersen, B.R. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1993-05)
    Experimental heat transfer coefficients for R-134a, MP-39, and R-12 are reported herein. Tests were conducted using a single-tube evaporator test facility. The test section used was a 2.43 m (8-foot) long, 7.04 mm ...

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  • VanderZee, J.C. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1993-05)
    The objective of the work presented in this paper is the development of a transient model of a mobile air conditioning condenser. Refmement of a steady state model is an intermediate task that is especially important for ...

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  • Smith, S.A. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1993-05)
    The objectives of this study were to develop semi-theoretical steady state and transient models of a mobile air conditioning evaporator for use in a complete system simulation. The steady state evaporator heat transfer ...

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  • Dobson, M.K.; Chato, J.C.; Hinde, D.K.; Wang, S.P. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1993-05)
    Experimental and analytical work has been performed on local heat transfer for intube condensation of pure R-134a and R-12. The data were taken in a 4.57 mm (0.18 in) ill smooth copper tube of 2.90 m (9.5 ft) length. The ...

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  • Hahn, G.W. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1993-06)
    A model capable of simulating the preformance of room air conditioners was developed. The new model uses a Newton-Raphson solution scheme framework in which the equations are uncoupled from the solution algorithm. The ...

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  • Dobson, M.K.; Wattelet, J.P.; Chato, J.C. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1993-06)

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