Microchannel Heat Exchanger Design for Evaporator and Condenser Applications

Kim, Man-Hoe; Lee, Sang Yong; Mehendale, Sunil; Webb, Ralph L.

doi:10.1016/s0065-2717(03)37004-2

Cited by 37 publications

(22 citation statements)

References 154 publications

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“…Beyond this critical Reynolds number, the flow efficiency is independent of the Reynolds number. Kim et al [33] reported that this phenomenon is attributed with the transition of flow pattern from duct-to louver-directed flow.…”

Section: Critical Reynolds Numbermentioning

confidence: 97%

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Saleem

Kim

2017

Energies

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Abstract:The air-side thermal-hydraulic performance of multi-louvered aluminium fin heat exchangers is investigated. A systematic numerical study has been performed to analyze the air-sde thermal hydraulic characteristics over a wide range of Reynolds number i.e., from 30 to 500. Air-side heat transfer coefficient and pressure drop were calculated and validated over the mentioned band of Reynolds numbers. The critical Reynolds number was determined numerically; and also the variation of flow pattern along with the air-side heat transfer coefficient and pressure drop in a multi-louvered heat exchanger associated with Re cri has been reported. Moreover, a parametric study of the multi-louvered aluminium fin heat exchangers was also performed for 36 heat exchanger configurations with the louver angles (19-31 • ); fin pitches (1.0, 1.2, 1.4 mm) and flow depths (16, 20, 24 mm); and the geometric configuration exhibiting the highest air-side heat transfer coefficient was reported. The air-side heat transfer coefficient and pressure drop results for different geometrical configurations were presented in terms of Colburn j factor and Fanning friction factor f ; as a function of Reynolds number based on louver pitch.

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Section: Critical Reynolds Numbermentioning

confidence: 97%

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Saleem

Kim

2017

Energies

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“…Micro-channel or compact heat exchangers are widely used in modern A/Cs, heat pumps, and refrigeration systems for residential, industrial, automotive, and process industry applications because of their potential to enhance the heat transfer coefficient (Kim et al 2003;Han et al 2012). These types of heat exchangers have advantages in compactness (17.2 and 15.1 % volume reduction for the evaporator and condenser, respectively), weight (2.8 and 14.9 % lighter for the evaporator and condenser, respectively), and heat transfer characteristics compared with the currently used heat exchangers in the AAC industry (Qi et al 2010).…”

Section: Micro-channel Heat Exchangersmentioning

confidence: 99%

Achieving a better energy-efficient automotive air-conditioning system: a review of potential technologies and strategies for vapor compression refrigeration cycle

et al. 2015

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This article presents a review of potential technologies and strategies to develop an energyefficient automotive air-conditioner based on the vapor-compression refrigeration cycle system. This paper is broadly divided into two sections. The first is a review of component optimization (primary and secondary components) that enhances the energy efficiency of the automotive air-conditioning (AAC) system. The second presents a review of operational management and control that efficiently consumes energy in operating the AAC system while maintaining vehicular thermal comfort satisfaction. Some of the technologies and strategies described in this article are still conceptual and are the subject of ongoing research. However, the growing demand to reduce energy consumption by developing a new AAC system has led to an increasing number of related studies aimed at generating alternative conventional systems in the near future. Keywords Automotive air-conditioning system . Efficient component . Energy efficiency improvement . Operational management Nomenclature A/C Air-conditioning AAC Automotive air-conditioning CRC Conventional refrigerant cycle DEAC Dual-evaporator air-conditioning DX Direct expansion EEV Electronic expansion valve EV Electric vehicle EVDC Externally controlled variable capacity compressor FCC Fixed capacity compressor FDC Fixed displacement compressor FSTPID Fuzzy self-tuning proportional integral derivative HVAC Heating, ventilation, and air conditioning MEC Modified ejector cycle RV Revolving vane SC Standard cycle SEC Standard ejector cycle TEV Thermostatic expansion valve TPERC Two-phase ejector refrigerant cycle VAV Variable air volume VCC Variable capacity compressor VCR Vapor compression refrigeration Energy Efficiency

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“…In many published literatures, the authors used this method for the data reduction (e.g. Jacobi and Goldschimildt [5]; Wang et al [6]; Corberan and Melon [7]; Wang et al [8,9]; Kim and Bullard [10]; Wang et al [11], Kim et al [12,13]). This model is based on the enthalpy potential applicable to a process of sensible cooling and dehumidifying.…”

Section: Experimental Apparatusmentioning

confidence: 99%

A review on reduction method for heat and mass transfer characteristics of fin-and-tube heat exchangers under dehumidifying conditions

Pirompugd

Wang

2009

International Journal of Heat and Mass Transfer

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Microchannel Heat Exchanger Design for Evaporator and Condenser Applications

Cited by 37 publications

References 154 publications

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Achieving a better energy-efficient automotive air-conditioning system: a review of potential technologies and strategies for vapor compression refrigeration cycle

A review on reduction method for heat and mass transfer characteristics of fin-and-tube heat exchangers under dehumidifying conditions

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