Browse by Author "Jacobi, A.M."

  • Ge, H.; Jacobi, A.M.; Dutton, J.C. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2002-10)
    Offset-strip fins are used in many compact heat exchanger applications because of excellent thermalhydraulic performance. Enhancing the air-side heat transfer performance for offset-strip fins can lead to smaller, more ...

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  • Tang, A.D.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2001-07)
    The effect of condensate retention on the air-side heat transfer and pressure drop performance of automotive evaporator coils was studied. Experiments under wet and dry conditions were conducted using offset strip and ...

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  • Park, Y.G.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2001-05)
    The air-side thermal-hydraulic performance of serpentine-fin, flat-tube heat exchangers is compared to that of conventional plate-fin, round-tube designs for various fin geometries and surface conditions. Heat exchanger ...

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  • Xia, Y.; Hrnjak, P.S.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2006-12)
    The thermal-hydraulic behavior of folded-louvered-fin, microchannel heat exchangers is explored under conditions of air-side frosting, defrosting, and refrosting. The temperature distribution within a two-dimensional composite ...

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  • Kim, G.J.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-01)
    Fin-and-tube heat exchangers are commonly used in air-conditioning systems and ,. improving the efficiency of this component is very important. For a fin-and-tube heat exchanger used as an evaporator, moisture from the ...

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  • Korte, C.M.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1997-08)
    The effects of condensation on the air-side performance of plate-fin-tube heat exchangers have been experimentally investigated by conducting experiments under dry conditions and then repeating these experiments under ...

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  • Kaiser, J.M.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-07)
    The effect of condensate accumulation and shedding on the air-side thermal performance of automotive evaporator coils has been studied. Experiments under wet and dry conditions were conducted to expose the impact of ...

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  • Yin, J.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-01)
    The effect of condensation on air-side heat transfer performance has been studied for plain-fin-and-tube and wavy-louvered heat exchangers with fin spacings of 2.12, 1.57, and 1.27 mm. Wet and dry heat exchanger experiments ...

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  • Aldana, J.P.; Georgiadis, J.G.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2002-03)
    The connection between chlorofluorocarbons and ozone depletion has prompted a resurgence in the study of environmentally friendly refrigerants for heat exchanger applications. Recent studies have shown compact heat exchangers ...

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  • Hu, Xiaolan; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1997-10)
    When a liquid film falls from one tube to another below it, the flow can take the form of discrete droplets, individual jets or a continuous sheet. Experiments exploring the effects of thermophysical properties and ...

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  • Pira, J.V.; Bullard, C.W.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-08)
    This report describes analyses aimed at integrating component optimization and system design by developing heat-exchanger performance evaluation criteria (PEC) that account for the system-level performance impacts of ...

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  • Davis, M.A.; Jacobi, A.M.; Hrnjak, P.S. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1996-09)
    The objective of this study was to develop a flexible facility for evaluating the to-scale thermal performance of heat exchangers. During this phase of the project, exchanger testing was completed on three refrigerator ...

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  • El Sherbini, A.I.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-07)
    Longitudinal vortex generation is a technique for enhancing heat transfer. Recent studies have tried to simulate the conditions for vortex generators in heat exchangers. In this work, the effectiveness of delta-wing ...

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  • DeJong, N.C.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1995-10)
    The efficiency of heat exchangers is important in the HV ACIR industry. Driven by high energy standards and increasing competition, manufacturers are seeking to decrease air-side resistance in heat exchangers by increasing ...

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  • Rush, T.A.; Jacobi, A.M.; Newell, T.A. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1997-07)
    Wavy passages are one of the many devices being considered by manufacturers in the HV ACIR industry to increase the air-side heat transfer coefficient for a variety of heat exchanger applications. The purpose of this ...

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  • Wartick, N.W.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-01)

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  • Zeller, S.E.; Weaver, R.L.; Dutton, J.C.; Jacobi, A.M.; Balachandar, S. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 2000-04)
    Project 84 concentrated on understanding the noise generating mechanisms of axial-flow fans with the intent of proposing methods of component design and system assembly by which noise generation is reduced or minimized. ...

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  • DeJong, N.C.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1999-01)
    In many compact heat exchanger applications, interrupted-fin surfaces are used to enhance air-side heat transfer performance. One of the most common interrupted surfaces is the louvered fin. The goal of this work is to ...

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  • Storey, B.D.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1997-07)
    An experimental study of frost growth under the influence of streamwise vortices in a laminar channel flow is presented. A new model of frost growth is developed to normalize the growth rate of frost with respect to the ...

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  • Shelton, J.C.; Jacobi, A.M. (Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign., 1995-03)

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